以下，一面參照隨附圖式，一面對本發明之一實施形態進行說明。 本實施形態之防蝕結構體具有2層以上之層。 又，如圖1所示，本實施形態之防蝕結構體1具備覆蓋金屬製構件20之防蝕片層A、及覆蓋該防蝕片層A之保護層B。防蝕片層A係由防蝕片形成。保護層B係藉由面塗材料而形成。 本實施形態之防蝕結構體1具備防蝕片層A，藉此容易增大防蝕結構體1本身之厚度，其結果為，容易抑制防蝕結構體1內部之乾燥。並且，本實施形態之防蝕結構體1具有容易發揮防蝕性能之優勢。 本實施形態之防蝕結構體1具備保護層B，藉此具有可抑制防蝕片層A劣化，其結果為，耐候性變得優異之優勢。 又，本實施形態之防蝕結構體1具備保護層B，藉此具有可抑制防蝕片層A剝落之優勢。 進而，本實施形態之防蝕結構體1具備保護層B，藉此具有耐摩擦性變得優異之優勢。 進而，本實施形態之防蝕結構體1進而具備由防蝕漿料(以下，亦稱為「底塗材料」)形成之防蝕漿料層C(以下，亦稱為「底塗層C」)。上述防蝕漿料層C形成於較上述防蝕片層A更靠上述金屬製構件20側，且與上述金屬製構件20之表面接觸。 本實施形態之防蝕結構體1具備底塗層C，藉此具有容易密接於金屬製構件20而防蝕性能變得優異之優勢。 又，於金屬製構件20之表面存在凹凸部及異形部之至少一者之情形時，本實施形態之防蝕結構體1較佳為進而具備由防蝕膠黏劑形成之防蝕膠黏劑層D。上述防蝕膠黏劑層D形成於較上述防蝕片層A更靠上述金屬製構件側。又，上述防蝕膠黏劑層D配置於上述防蝕片層A與上述防蝕漿料層C之間。 本實施形態之防蝕結構體1根據金屬製構件20之凹凸部或異形部之形狀而設置上述防蝕膠黏劑層D，藉此具有防蝕片層A之施工變得容易之優勢。 又，本實施形態之防蝕結構體1根據金屬製構件20之凹凸部或異形部之形狀而設置上述防蝕膠黏劑層D，藉此具有對金屬製構件20之密接性變得良好之優勢。 又，本實施形態之防蝕結構體1具備上述防蝕膠黏劑層D，藉此具有可縮短防蝕結構體1之施工時間之優勢。 即，於防蝕結構體不具備防蝕膠黏劑層之情形時，於將防蝕片捲繞於金屬製構件20時，於金屬製構件20之凹凸部或異形部空氣容易進入至金屬製構件20與防蝕片或防蝕片彼此之間。於該情形時，為了提高防蝕性能，產生一面於防蝕片形成切口而使空氣逃逸一面捲繞防蝕片之作業。 然而，本實施形態之防蝕結構體1具備上述防蝕膠黏劑層D，藉此具有容易避免用以使空氣逃逸之作業，從而可縮短防蝕結構體1之施工時間之優勢。 根據以上說明，本實施形態之防蝕結構體1藉由具有上述優勢而容易保持防蝕性。 上述金屬製構件20可用作輸送流體物之管線。上述金屬製構件20係具備複數個具有凸緣部21之圓筒狀之管且管彼此由凸緣部21連接而成。鄰接之管之凸緣部21彼此由螺栓22及螺母23固定。即，上述金屬製構件20成為圓筒狀，又，藉由凸緣部21、螺栓22、螺母23等而於外表面形成有凹凸。 以下，對各層詳細地進行說明。 (C：防蝕漿料層(底塗層)) 上述底塗層C可藉由在金屬製構件20之表面塗佈底塗材料而形成。具體而言，上述底塗層C可藉由在圓筒狀之金屬製構件20之整個外側表面較薄地塗佈底塗材料而形成。上述底塗層C之外表面藉由上述金屬製構件之凹凸而形成有凹凸。 上述底塗層C通常係以成為0.01～10 mm之平均厚度之方式形成。 構成該底塗層C之第1防蝕複合物(防蝕漿料)(底塗材料)C含有包含防銹劑等之有機黏合劑C1及無機填充材料C2。 若考慮到於金屬製構件20之表面上塗開時之作業性或填充性，則該底塗材料較佳為於常溫區域下之“稠度”之值較高。 於本說明書中，該“稠度”意指基於JIS K2235-1991「「石油蠟 5.10稠度試驗方法」所測定之值。 具體而言，本實施形態之底塗材料於20℃下之“稠度”較佳為150以上，更佳為200以上，尤佳為250以上。 又，若考慮到冬季之施工，則本實施形態之底塗材料於0℃下之“稠度”較佳為100以上，更佳為150以上，尤佳為200以上。 又，若考慮到使防蝕帶12牢固地固接於金屬製構件，則底塗材料之“稠度”之值較高未必較佳。 尤佳為底塗材料即便於加溫時亦為一定以下之“稠度”。 具體而言，本實施形態之底塗材料於20℃下之“稠度”較佳為400以下，更佳為350以下，尤佳為300以下。 進而，底塗材料於40℃下之“稠度”較佳為500以下，更佳為450以下，尤佳為400以下。 並且，於將0℃下之“稠度”之值設為N0
、將20℃下之“稠度”之值設為N20
之情形時，本實施形態之底塗材料之下述式(2)所表示之低溫感溫比較佳為0.6以上，更佳為0.75以上。 低溫感溫比＝[N0
/N20
]・・・(2) 又，於將40℃下之“稠度”之值設為N40
之情形時，本實施形態之底塗材料之下述式(3)所表示之高溫感溫比較佳為2以下，更佳為1.5以下。 再者，關於上述低溫感溫比之上限值、及上述高溫感溫比之下限值，通常為「1.0」。 高溫感溫比＝[N40
/N20
]・・・(3) 以下，更詳細地對各成分進行說明。 (C1：底塗材料中之有機黏合劑) 本實施形態之底塗材料為了發揮此種溫度特性而上述有機黏合劑C1之主成分成為聚丁烯。又，關於下述之上述無機填充材料，一部分成為經有機化處理之膨潤土粒子。 作為上述聚丁烯，可採用一般之聚丁烯，可採用將異丁烯作為主成分並使1-丁烯或2-丁烯與一部分反應而成之共聚物且於常溫(23℃)下為液狀之鏈狀烴化合物。 若考慮到於冬季之室外等低溫環境下將底塗材料於金屬製構件之表面塗開時之作業性，則上述聚丁烯基於JIS K2269：1987「原油及石油製品之流動點以及石油製品霧點試驗方法」所測定之流動點較佳為5.0℃以下，更佳為2.5℃以下。 又，若考慮到抑制於底塗材料發揮過度之流動性，則上述聚丁烯之流動點較佳為-7.5℃以上，更佳為-5.0℃以上。 上述聚丁烯基於JIS K2283：2000「原油及石油製品-動黏度試驗方法及黏度指數算出方法」所測定之40℃下之動黏度較佳為10 mm2
/s以上且3000 mm2
/s以下，更佳為50 mm2
/s以上且1500 mm2
/s以下。 聚丁烯之數量平均分子量較佳為300～3000，更佳為500～2000，進而更佳為700～2000，尤佳為1000～2000。 再者，本說明書中之聚丁烯之「數量平均分子量」意指藉由凝膠滲透層析法(GPC)所求出之分子量。 更詳細而言，所謂「數量平均分子量」，意指藉由下述條件所測定之值。 ＜分子量測定方法＞ GPC裝置： HLC-8120GPC(管柱：TSKgel SuperHZM-H/HZ4000/HZ3000/ HZ2000、管柱尺寸：6.0 mm I.D.×150 mm)，檢測器：示差折射率檢測器(RI)、東曹公司製造 GPC測定條件： 流動相四氫呋喃、流量0.6 mL/min、管柱溫度40℃、樣品濃度1.0 g/L、注入量20 μL 底塗材料中之有機黏合劑較佳為含有如上述之聚丁烯40質量%以上，更佳為含有45質量%以上，進而更佳為含有50質量%以上。 該有機黏合劑中，亦可進而含有常溫下為液狀之聚異戊二烯或常溫下為液狀之聚丁二烯等作為聚丁烯以外之成分。 再者，聚異戊二烯或聚丁二烯之較佳之流動點或動黏度之值與上述聚丁烯共通。 上述有機黏合劑中，可進而適當含有石蠟系油、環烷系油、芳香系油、各種蠟等。 此外，作為構成有機黏合劑之上述防銹劑，例如可列舉：無機系防銹劑、有機系防銹劑。 作為無機系防銹劑，例如可列舉：鉻酸鹽、亞硝酸鹽、矽酸鹽、磷酸鹽、聚磷酸鹽等。 作為有機系防銹劑，例如可列舉：單寧酸、羧酸(油酸、二聚酸、環烷酸等)、羧酸金屬皂(羊毛脂鈣、環烷酸鋅、氧化蠟鈣、氧化蠟鋇等)、磺酸鹽(磺酸鈉、磺酸鈣、磺酸鋇等)、胺鹽、酯(高級脂肪酸與甘油反應而獲得之酯、山梨糖醇酐單異硬脂酸酯、山梨糖醇酐單油酸酯等)等。 其中，較佳為使上述底塗材料中一併含有上述單寧酸與氣化性防銹劑。 作為上述單寧酸，較佳為源自五倍子之單寧酸。 作為該氣化性防銹劑，例如可列舉胺類之各種鹽(例如，亞硝酸鹽、羧酸鹽、鉻酸鹽)類或羧酸之酯類。 具體而言，可使底塗材料中含有苯并三唑、甲苯并三唑、亞硝酸二環己基銨、水楊酸二環己基銨、苯甲酸單乙醇胺、苯甲酸二環己基銨、苯甲酸二異丙基銨、亞硝酸二異丙基銨、胺基甲酸環己基胺、亞硝酸硝基萘銨、苯甲酸環己基胺、環己烷羧酸二環己基銨、環己烷羧酸環己基胺、丙烯酸二環己基銨、丙烯酸環己基胺等作為氣化性防銹劑。 底塗材料中所含有之氣化性防銹劑亦可為2種以上。 有機黏合劑亦可除該等以外含有以下之樹脂作為黏度調整劑：例如二甲苯樹脂、松香或聚合松香、氫化松香、松香酯等改性松香系樹脂；萜烯樹脂、萜酚樹脂、松香酚樹脂等萜烯系樹脂；脂肪族系、芳香族系及脂環族系石油樹脂；燻草咔樹脂、苯乙烯系樹脂、烷基酚樹脂等。 又，為了提高無機填充材料與有機黏合劑中所含有之油之親和性，有機黏合劑亦可含有偶合劑或界面活性劑。 作為上述偶合劑，例如可列舉：矽烷偶合劑、鈦酸酯偶合劑等。 作為上述界面活性劑，可列舉脂肪胺。作為脂肪胺，較佳為碳數為10以上之脂肪胺。再者，碳數可利用液相層析質譜分析法(LC/MS)或氣相層析質譜分析法(GC/MS)進行測定。 進而，有機黏合劑亦可適當含有抗氧化劑、抗老化劑、防黴劑、防蟲劑、防鼠劑、抗菌劑、顏料等各種添加劑。 (C2：底塗材料中之無機填充材料) 與該有機黏合劑一起構成底塗材料之無機填充材料如上所述般含有經有機化處理之膨潤土粒子(以下，亦稱為「有機膨潤土粒子」)。 再者，作為有機膨潤土粒子，市售有各種使存在於膨潤土之結晶層間之陽離子與氯化雙(氫化牛油)二甲基銨或溴化鯨蠟基三甲基銨等四級銨離子進行離子交換而成者。 本實施形態之第1防蝕複合物中可含有此種市售品。 上述無機填充材料中，可與有機膨潤土粒子分開另外含有雲母粒子或絹雲母粒子等板狀礦物粒子。 又，上述無機填充材料中，以對底塗材料之著色等為目的，可含有二氧化鈦粒子、氧化鋅粒子、石墨粒子、碳黑粒子、鐵丹粒子等。 進而，上述無機填充材料中，可含有滑石粒子、氫氧化鋁粒子、碳酸鈣粒子、黏土粒子、氧化鋁粒子等。 上述有機膨潤土粒子係對於使底塗材料發揮觸變性而言有效之成分。 並且，即便有機黏合劑表現出較高之流動性，有機膨潤土粒子亦可分散於該有機黏合劑中而形成凝膠。 又，即便有機黏合劑於加溫時流動性大幅提高，藉由使有機膨潤土粒子分散而形成之凝膠只要不進行過度之加溫，則亦會維持凝膠狀態。 並且，該凝膠如上所述般發揮觸變性，故而於施加剪切力之情形時，表觀上之黏度大幅降低。 因此，有機膨潤土粒子係對於使底塗材料成為防蝕膠黏劑層D與金屬製構件20之固接性優異者而言有效，不僅如此，對於提高將該底塗材料於金屬製構件20之表面上塗開時之作業性而言亦有效之成分。 該有機膨潤土粒子於將底塗材料中所包含之有機黏合劑之含量設為100質量份時，較佳為以成為5質量份以上且40質量份以下之方式包含於底塗材料中，更佳為以成為10質量份以上且25質量份以下之方式包含於底塗材料中。 進而，有機膨潤土粒子較佳為以於上述無機填充材料中所占之比率成為15質量%以上且40質量%以下之方式包含於底塗材料中。 若上述有機膨潤土粒子之粒徑過大，則即便為相同之調配量，亦難以充分地發揮於有機黏合劑中之凝膠化性能。 根據此種情況，上述有機膨潤土粒子較合適為於乾燥狀態下利用450篩網(32 μm篩網)進行篩分時95質量%以上通過篩(篩網殘留部分為5質量%以下)者。 又，並不限定於有機膨潤土粒子，於上述滑石粒子等其他無機填充材料中，若採用粒徑過大者，則即便為相同之調配量，與採用粒徑較細者之情形時相比，亦有容易使底塗材料產生黏膩而導致於金屬製構件之表面塗開時之作業性降低之虞。 關於有機膨潤土粒子以外之無機填充材料中之二氧化鈦粒子、氧化鋅粒子、石墨粒子、碳黑粒子、及鐵丹粒子等，於將有機黏合劑之含量設為100質量份時，分別較佳為以成為0.1質量份以上且5質量份以下之方式包含於底塗材料中，更佳為以成為0.5質量份以上且1.5質量份以下之方式包含於底塗材料中。 有機膨潤土粒子以外之無機填充材料中之上述滑石粒子強化底塗材料之效果優異，且對於對底塗材料賦予保形性而言有效。 於將上述底塗材料中所包含之有機黏合劑之含量設為100質量份時，上述滑石粒子較佳為以成為20質量份以上且80質量份以下之方式含有，更佳為以成為30質量份以上且60質量份以下之方式含有。 又，滑石粒子較佳為以於上述無機填充材料中所占之比率成為55質量%以上且80質量%以下之方式含有於底塗材料中。 於可使底塗材料成為施工性優異者之方面，滑石粒子藉由雷射繞射式粒度分佈測定裝置而求出之中值粒徑較佳為1 μm以上且100 μm以下，更佳為1 μm以上且50 μm以下，進而更佳為10 μm以上且40 μm以下。 又，作為滑石粒子，較合適為利用75 μm篩網進行篩分時99質量%以上通過篩(篩網殘留部分為1質量%以下)者。 該底塗材料較佳為如上所述般感溫性較低。 因此，於製備底塗材料時，較佳為於將所有調配物加以混練之前，暫時將以有機膨潤土粒子與有機黏合劑為主體之混和物加以混練而製作凝膠狀物，並向該凝膠狀物中添加其他調配物而實施混練。 若為例如40～50℃左右之溫度，則以如上方式製備之底塗材料不會自金屬製構件之表面滴落，即便於夏季等，亦發揮良好之形狀保持性。 (防蝕膠黏劑層D) 上述防蝕膠黏劑層D係藉由向防蝕漿料層C之凹部填充防蝕膠黏劑(第2防蝕複合物)而形成，以減小底塗層C之凹凸。又，上述防蝕膠黏劑層D可嵌入底塗層C與防蝕片層A之間之間隙，且可抑制金屬製構件20之腐蝕。 上述防蝕膠黏劑含有黏合劑(D1)之油分及無機填充材料(D2)。 上述黏合劑含有於常溫常壓(例如20℃、1個大氣壓)下為液狀之液狀橡膠。 上述黏合劑較佳為含有上述液狀橡膠作為主成分。上述黏合劑之油分更佳為以成為油分整體之60質量%以上且100質量%以下之方式含有上述液狀橡膠，更佳為以成為油分整體之70質量%以上且100質量%以下之方式含有上述液狀橡膠。 又，上述防蝕膠黏劑較佳為含有含活性氫之有機化合物作為上述黏合劑，該含活性氫之有機化合物具備具有活性氫之官能基。作為上述含活性氫之有機化合物，可列舉具有羥基、胺基、羧基、硫醇基等官能基之有機化合物等。上述防蝕膠黏劑具有含活性氫之有機化合物，藉此可增加黏度，其結果為，可抑制成分分離。 上述防蝕膠黏劑含有較佳為5～40質量%、更佳為10～25質量%之上述含活性氫之有機化合物。 上述含活性氫之有機化合物較佳為含有具有羥基之含羥基之有機化合物。 又，就容易使防蝕膠黏劑成為所需特性之觀點而言，較佳為上述液狀橡膠之一部分或全部為含羥基之有機化合物。 再者，上述含活性氫之有機化合物亦可作為與上述液狀橡膠分開另外之成分含有於上述防蝕膠黏劑中。作為與上述液狀橡膠分開另外之成分之含活性氫之有機化合物，例如可列舉：醇類(例如乙醇、甲醇等)、胺類(例如甲基胺、二甲基胺等)、飽和脂肪酸(例如丁酸、戊酸等)、不飽和脂肪酸(例如油酸、棕櫚油酸等)、半胱胺酸等。又，亦可列舉醇類之衍生物、胺類之衍生物、飽和脂肪酸之衍生物、不飽和脂肪酸之衍生物、半胱胺酸之衍生物等。 作為上述液狀橡膠，可列舉：液狀聚異戊二烯(D1a1)、液狀聚丁二烯(D1a2)、液狀聚α烯烴(D1b)、液狀聚矽氧橡膠、液狀氯丁二烯橡膠、液狀苯乙烯-丁二烯橡膠、液狀丙烯腈-丁二烯橡膠、液狀乙烯-丙烯橡膠、液狀胺基甲酸酯橡膠、液狀氟橡膠等。 如上所述，就容易使防蝕膠黏劑成為所需特性之觀點、及抑制成分分離之觀點而言，上述液狀橡膠較佳為含有作為含活性氫之有機化合物之液狀橡膠。 上述液狀橡膠較佳為含有液狀聚異戊二烯及液狀聚丁二烯之至少一者。 又，上述液狀橡膠較佳為含有分子末端具有羥基之液狀聚異戊二烯及分子末端具有羥基之液狀聚丁二烯之至少一者作為上述含羥基之有機化合物。 又，上述液狀橡膠較佳為含有液狀聚α烯烴(D1b)。 作為上述無機填充材料，較佳為於防蝕膠黏劑中含有經有機化處理之膨潤土粉末(有機膨潤土粉末)(D2a)。 進而，於本實施形態中，較佳為於上述防蝕膠黏劑中進而含有氫氧化鋁粉末(D2b)、及碳酸鈣粉末(D2c)作為上述無機填充材料。 再者，於抑制上述防蝕膠黏劑產生分離之方面，液狀聚異戊二烯及液狀聚丁二烯較佳為於分子末端具有羥基，更佳為於分子兩末端具有羥基。 該羥基係對於使液狀聚異戊二烯及液狀聚丁二烯束縛於經有機化處理之膨潤土粉末(以下，亦稱為「有機膨潤土粉末」)中而成為凝膠狀態而言有效之官能基。 上述液狀聚α烯烴通常具有梳型之分子結構，於本實施形態中，用來將油分調整為適度之黏度。 上述黏合劑之油分較佳為以上述液狀聚異戊二烯及上述液狀聚丁二烯合計成為油分整體之60質量%以上且100質量%以下之方式含有，更佳為70質量%以上且100質量%以下。 於使上述防蝕膠黏劑含有上述液狀聚α烯烴之情形時，於可將黏合劑調整為適度之黏度而使該防蝕膠黏劑之施工性良好之方面，該液狀聚α烯烴較佳為以相對於上述液狀聚異戊二烯及上述液狀聚丁二烯之合計100質量份成為10質量份以上且40質量份以下之方式含有。 以下，更詳細地對各成分進行說明。 (D1)黏合劑 (D1a1)液狀聚異戊二烯 作為上述液狀聚異戊二烯，可使用一般之順-1,4鍵為80%以上者，較合適為依據ASTM D 2503而求出之數量平均分子量為1000～4000且30℃下之黏度為5～10 Pa・s者。 再者，數量平均分子量係依據ASTM D 2503而求出。 又，關於黏度，藉由B型黏度計(單一圓筒形旋轉黏度計)(轉子：No.4)，測定轉數為50 rpm時之黏度(JIS Z8803：2011)。 又，作為上述液狀聚異戊二烯，羥值較佳為30～60 mgKOH/g，溴值較佳為150～300 g/100 g。 再者，本實施形態中之「羥值」之值意指基於JIS K1557-1：2007「塑膠-聚胺基甲酸酯原料多元醇試驗方法-第1部：羥值之求出方法」所測定之值。 又，本實施形態中之「溴值」之值意指基於JIS K2605-1996「石油製品-溴值試驗方法-電滴定法」所測定之值。 (D1a2)液狀聚丁二烯 作為上述液狀聚丁二烯，較佳為該聚丁二烯中，70%以上且90%以下為1,4鍵且實質上不含有1,3鍵、剩餘部分為1,2鍵者。 又，作為上述液狀聚丁二烯，較合適為數量平均分子量為2000～4000且30℃下之黏度為1～10 Pa・s者。 再者，數量平均分子量係依據ASTM D 2503而求出。 又，關於黏度，藉由B型黏度計(單一圓筒形旋轉黏度計)(轉子：No.4)，測定轉數為50 rpm時之黏度(JIS Z8803：2011)。 又，作為上述液狀聚丁二烯，上述羥值較佳為40～60 mgKOH/g，溴值較佳為200～300 g/100 g。 (D1b)液狀聚α烯烴 作為上述液狀聚α烯烴，較合適為使碳數6～14之α烯烴聚合而成之合計碳數為30～50且分子量為500～600者。 又，於使黏合劑發揮適度之黏性之方面，該液狀聚α烯烴於40℃下之動黏度較佳為20～40 mm2
/s。 再者，本實施形態中之「動黏度」之值意指基於JIS K2283：2000「原油及石油製品-動黏度試驗方法及黏度指數算出方法」所測定之值。 (D1x)其他成分 上述防蝕膠黏劑中，可含有上述液狀聚異戊二烯、上述液狀聚丁二烯及上述液狀聚α烯烴以外者作為黏合劑。 作為上述防蝕膠黏劑可含有之其他黏合劑，可列舉各種石蠟系油或各種環烷系油等。 又，亦可使上述防蝕膠黏劑中含有各種蠟等油性成分。 但是，於含有其他黏合劑或油性成分之情形時，較佳為以其合計含量成為上述防蝕膠黏劑整體之10質量%以下之方式含有，更佳為設為5質量%以下。 上述防蝕膠黏劑亦可進而含有黏著賦予劑、防銹劑、防黴劑、抗菌劑、抗氧化劑、光穩定劑、紫外線吸收劑、光澤劑、顏料等添加劑作為黏合劑。 其中，於上述防蝕膠黏劑中含有包含大量雙鍵之液狀聚異戊二烯或液狀聚丁二烯之情形時，較佳為含有抗氧化劑、光穩定劑、紫外線吸收劑等，較佳為以相對於液狀聚異戊二烯與液狀聚丁二烯之合計100質量份為0.5質量份以上且2質量份以下左右之比率含有受阻酚系之抗氧化劑作為上述抗氧化劑。 又，上述防蝕膠黏劑較佳為含有0.05～1.00質量%之受阻酚系之抗氧化劑。 (D2)無機填充材料 (D2a)有機膨潤土粉末 上述有機膨潤土粉末較佳為含有於用以捕捉液狀聚異戊二烯或液狀聚丁二烯等黏合劑並使黏合劑凝膠化之上述防蝕膠黏劑中。 又，於將黏合劑整體之含量設為100質量份時，有機膨潤土粉末較佳為以成為10質量份以上且35質量份以下之方式含有於上述防蝕膠黏劑中，更佳為以成為15質量份以上且25質量份以下之方式含有於上述防蝕膠黏劑中。 進而，較佳為以於上述無機填充材料中所占之比率成為2質量%以上且10質量%以下之方式含有有機膨潤土粉末。 於上述防蝕膠黏劑含有液狀聚異戊二烯與液狀聚丁二烯之情形時，於將液狀聚異戊二烯與液狀聚丁二烯之合計含量設為100質量份時，有機膨潤土粉末通常以成為10質量份以上且50質量份以下之方式含有於上述防蝕膠黏劑中即可，更佳為以成為20質量份以上且30質量份以下之方式含有於上述防蝕膠黏劑中。 又，上述防蝕膠黏劑較佳為含有1～15質量%之有機膨潤土粉末。 再者，關於有機膨潤土粉末，市售有各種使氯化雙(氫化牛油)二甲基銨或溴化鯨蠟基三甲基銨等四級銨離子與存在於結晶層間之陽離子進行離子交換而成者，上述防蝕膠黏劑可利用此種市售品。 該有機膨潤土粉末若採用粒徑過大者，則即便為相同之調配量，與採用粒徑較細者之情形時相比，亦有如下之虞：容易導致含活性氫之有機化合物(液狀聚異戊二烯、液狀聚丁二烯等)之捕捉能力不足，為了抑制上述防蝕膠黏劑產生成分分離(油分離)而必須大量調配於上述防蝕膠黏劑中。 又，並不限定於有機膨潤土粉末，於下述氫氧化鋁粉末或碳酸鈣粉末等中，若採用粒徑過大者，則與以相同之調配量採用粒徑較細者之情形時相比，亦有如下之虞：容易使上述防蝕膠黏劑產生黏膩而導致膩子掩埋等中之作業性降低。 根據此種情況，上述有機膨潤土粉末較合適為於乾燥狀態下利用450篩網(32 μm篩網)進行篩分時95質量%以上通過篩(篩網殘留部分為5質量%以下)者。 (D2b)氫氧化鋁粉末 為了對上述防蝕膠黏劑賦予保形性，例如即便於50℃之高溫下亦抑制自然流動，並且對上述防蝕膠黏劑賦予阻燃性，較佳為含有上述氫氧化鋁粉末。 就上述保形性或上述阻燃性之觀點而言，於將黏合劑整體之含量設為100質量份時，氫氧化鋁粉末較佳為以成為150質量份以上且300質量份以下之方式含有於上述防蝕膠黏劑中，更佳為以成為180質量份以上且250質量份以下之方式含有於上述防蝕膠黏劑中。 又，氫氧化鋁粉末較佳為以於上述無機填充材料中所占之比率成為40質量%以上且60質量%以下之方式含有。 氫氧化鋁於200℃～350℃之溫度下產生分解脫水，由於該脫水反應為吸熱反應，故而發揮於將上述防蝕膠黏劑加熱而欲開始燃燒時迅速進行冷卻之效果。 於使上述防蝕膠黏劑發揮此種阻燃效果之方面，氫氧化鋁粉末較佳為粒徑較細者。 另一方面，若採用粒徑過小之氫氧化鋁粉末，則有如下之虞：上述防蝕膠黏劑會成為牢固地繃緊之狀態而導致上述防蝕膠黏劑之易變形性或延展性受損，從而導致形成防蝕結構時之施工性降低。 因此，於可使上述防蝕膠黏劑成為施工性優異、阻燃性優異者之方面，藉由雷射繞射式粒度分佈測定裝置而求出之中值粒徑為1 μm以上且50 μm以下(較佳為10 μm以上且40 μm以下)且利用75 μm篩網進行篩分時99質量%以上通過篩(篩網殘留部分為1質量%以下)者適合作為本實施形態中之氫氧化鋁粉末。 (D2c)碳酸鈣粉末 為了與氫氧化鋁粉末同樣地對上述防蝕膠黏劑賦予保形性，較佳為含有上述碳酸鈣粉末。 就上述保形性之觀點而言，於將黏合劑整體之含量設為100質量份時，碳酸鈣粉末較佳為以成為100質量份以上且200質量份以下之方式含有於上述防蝕膠黏劑中，更佳為以成為130質量份以上且170質量份以下之方式含有於上述防蝕膠黏劑中。 又，碳酸鈣粉末較佳為以於上述無機填充材料中所占之比率為30質量%以上且50質量%以下而含有。 再者，於可使上述防蝕膠黏劑成為施工性優異者之方面，中值粒徑為1 μm以上且50 μm以下且利用75 μm篩網進行篩分時99質量%以上通過篩(篩網殘留部分為1質量%以下)者適合作為本實施形態中之碳酸鈣粉末。 (D2x) 上述防蝕膠黏劑中，可含有如上述之有機膨潤土、氫氧化鋁粉末、及碳酸鈣粉末以外之無機填充材料。 作為上述防蝕膠黏劑可含有之其他無機填充材料，可列舉：滑石粉末、黏土粉末、氧化鋁粉末等。 但是，於含有該等無機填充材料之情形時，較佳為以其合計含量成為無機填充材料整體之10質量%以下之方式含有，更佳為設為5質量%以下。 就冬季之施工性、夏季之施工性、及向表面溫度成為高溫(例如80℃)之配管之膩子掩埋等之利用性之觀點而言，防蝕膠黏劑較佳為成為以下之構成。 即，於防蝕膠黏劑中，較佳為無機填充材料含有經有機化處理之有機膨潤土粉末、氫氧化鋁粉末、及碳酸鈣粉末。 又，防蝕膠黏劑相對於油分100質量份，含有較佳為10質量份以上、更佳為15～25質量份、進而更佳為20～25質量份之上述有機膨潤土粉末。 進而，於防蝕膠黏劑中，上述氫氧化鋁粉末相對於上述碳酸鈣粉末之質量比較佳為1.00～1.50，更佳為1.08～1.40，進而更佳為1.20～1.33。 於將黏合劑整體之含量設為100質量份時，無機填充材料較佳為以成為200質量份以上且500質量份以下之方式含有於上述防蝕膠黏劑中，更佳為以成為300質量份以上且400質量份以下之方式含有於上述防蝕膠黏劑中。 於將黏合劑整體之含量設為100質量份時，使無機填充材料以成為200質量份以上之方式含有於上述防蝕膠黏劑中，藉此防蝕膠黏劑具有阻燃性優異之優勢。 又，於將黏合劑整體之含量設為100質量份時，使無機填充材料以成為500質量份以下之方式含有於上述防蝕膠黏劑中，藉此防蝕膠黏劑具有不易變硬而於形成防蝕膠黏劑層時容易操作之優勢。 上述無機填充材料之吸油量較佳為5 mL/100 g～50 mL/100 g，更佳為10 mL/100 g～40 mL/100 g，進而更佳為20 mL/100 g～30 mL/100 g。 再者，於本說明書中，該“吸油量”意指基於JIS K5101-13-1：2004「顏料試驗方法-第13部：吸油量-第1節：精製亞麻仁油法」所測定之值。 無機填充材料之吸油量可藉由構成無機填充材料之材料或無機填充材料中之各種材料之調配量進行調整。 就冬季之施工性之觀點而言，上述防蝕膠黏劑於0℃下之稠度較佳為30以上，更佳為40以上且100以下，進而更佳為50以上且90以下。 又，若考慮到夏季之使用等，則上述防蝕膠黏劑於40℃下之稠度較佳為150以下，更佳為50以上且130以下，進而更佳為60以上且100以下。 進而，於可成為延展性優異而對應保護之金屬製構件之形狀之追隨性優異者之方面、以及可使用指尖或刮刀等而容易地使表面平滑之方面，上述防蝕膠黏劑於常溫(例如20℃)下之稠度較佳為50以上且100以下，更佳為70以上且90以下。 又，上述防蝕膠黏劑於通常之使用狀況下所假定之高溫(例如50℃)下，稠度較佳為200以下，更佳為150以下。 再者，於本說明書中，該“稠度”意指基於JIS K2235-1991「石油蠟 5.10稠度試驗方法」所測定之值。 於本實施形態中，就可對防蝕膠黏劑賦予保形性或阻燃性之方面、及容易對防蝕膠黏劑之稠度進行微調整之方面而言，含有氫氧化鋁粉末或碳酸鈣粉末作為無機填充材料，但本實施形態之防蝕膠黏劑亦可僅含有有機膨潤土作為無機填充材料。 即，就若將無機填充材料僅設為有機膨潤土，則有所製作之防蝕膠黏劑之稠度等特性會根據液狀聚異戊二烯或液狀聚丁二烯之混合攪拌條件等大幅變動之虞之方面而言，於本實施形態中，以如上述之比率含有氫氧化鋁粉末或碳酸鈣粉末，但抑制油分自防蝕膠黏劑分離之效果之大部分係藉由有機膨潤土而帶來。 又，於本實施形態中，就可使油分發揮適度之黏性之方面而言，例示將液狀聚α烯烴與分子末端具有羥基之液狀聚異戊二烯或液狀聚丁二烯一起併用之情形，但本實施形態之防蝕膠黏劑亦可僅含有液狀聚異戊二烯或液狀聚丁二烯作為油分。 即，防蝕膠黏劑只要基本上含有有機膨潤土粉末、及分子末端具有羥基之液狀聚異戊二烯或液狀聚丁二烯，則可抑制油分自防蝕膠黏劑分離，而無需含有如上述所例示之所有成分。 (防蝕片層A) 形成上述防蝕片層A之防蝕片成為形成為帶狀之防蝕帶12。 本實施形態之防蝕結構體具有上述防蝕片層A，藉此可抑制物體觸碰等而導致防蝕結構體剝落，其結果為，可抑制金屬製構件之腐蝕。 上述防蝕片層A係將帶狀之防蝕片(防蝕帶)於底塗層C及防蝕膠黏劑層D上纏繞而形成，且藉由將防蝕帶半繞而形成。 因此，本實施形態之防蝕結構體1如圖2所示般具有包含自外側與防蝕膠黏劑層D接觸之第1層A1及自外側與該第1層A1接觸之第2層A2之2層結構之防蝕片層A。 另一方面，本實施形態中之防蝕片層A設置於防蝕結構體1，以發揮對金屬製構件之防蝕性，並且保護底塗材料及防蝕膠黏劑。 上述防蝕片具有基材、及含浸於該基材中之防蝕複合物(第3防蝕複合物)。該基材成為多孔質之片狀之基材片。 即，上述防蝕帶12係藉由將第3防蝕複合物12b含浸、擔載於帶狀之基材片12a而形成。 作為上述基材片，只要為可對防蝕帶12賦予適度之強度者，則材質並無特別限定，例如可使用包含聚酯纖維或聚丙烯纖維、聚醯胺纖維等之織布、不織布等。 又，關於上述基材片，其厚度亦並無特別限定，通常可採用0.1～15 mm厚度者、較佳為0.2～12 mm厚度者、進而較佳為0.3～10 mm厚度者。 上述第3防蝕複合物含有包含油之黏合劑(A1)及無機填充材料(A2)。 又，上述第3防蝕複合物較佳為含有不飽和油作為油。 進而，上述第3防蝕複合物之碘值較佳為10以上，更佳為20～50。 再者，關於碘值之值，可藉由實施基於JIS K5421：2000「沸油及煮亞麻仁油」之測定而求出。 又，上述第3防蝕複合物較佳為含有作為上述黏合劑之油及功能性添加劑以及無機填充材料，含有作為上述油之沸油，含有作為上述功能性添加劑之表面處理材料。上述第3防蝕複合物含有沸油、無機填充材料、及表面處理材料，藉此無機填充材料與油容易親和，其結果為，防蝕片層A之表面可變得光滑。 又，第3防蝕複合物較佳為相對於黏合劑100質量份而含有150～300質量份之無機填充材料，尤佳為含有200～250質量份。 進而，第3防蝕複合物較佳為相對於油100質量份而含有2～20質量份之表面處理材料，尤佳為含有5～15質量份。 作為構成第3防蝕複合物之防銹劑或無機填充材料，可採用與用作上述底塗材料之第1防蝕複合物相同者。 以下，更詳細地對各成分進行說明。 (防蝕片之黏合劑A1) 上述黏合劑A1含有油(A1a)、及功能性添加劑(A1b)。 (防蝕片之油A1a) 作為上述油中所含有之沸油，較合適為於乾燥劑之存在下將如上述之油進行加熱處理所得之碘值為130以上者。 該沸油較佳為基於JIS K5600-2-2：1999「塗料一般試驗方法-第2部：塗料之性狀-穩定性-第2節：黏度」所規定之Gardner型氣泡黏度計法所測定之黏度(23℃)為「A1」至「C」之間。 又，於本實施形態中，作為第3防蝕複合物所含有之沸油，碘值較佳為130～210，碘值尤佳為150～190。 進而，於本實施形態中，作為第3防蝕複合物所含有之沸油，較佳為利用JIS K5601-2-1：1999「塗料成分試驗方法-第2部：溶劑可溶物中之成分分析-第1節：酸值(滴定法)」所規定之方法而求出之酸值為2以下。 本實施形態之第3防蝕複合物中，較佳為含有10～30質量%之上述油，上述沸油於該油分中所占之比率較佳為30質量%以上。該沸油於上述油中所占之比率更佳為40質量%以上，尤佳為50質量%以上。 即，本實施形態之第3防蝕複合物之基油較佳為沸油。 本實施形態之第3防蝕複合物之基油為乾性油，藉此於使用防蝕帶12形成防蝕片層A後，可使該防蝕片層A成為牢固地繃緊之狀態。 又，本實施形態之第3防蝕複合物為沸油，藉此可使於使用防蝕帶12形成防蝕片層A後之乾燥適度。 防蝕片層A進行適度之乾燥，藉此可防止急遽之乾燥所導致之龜裂或形成與內部之性狀大幅不同之表面覆膜，從而可抑制因該覆膜過早地形成而導致產生漿泡狀之發泡。 上述油較佳為含有菜籽油。藉由上述油含有菜籽油，可抑制防蝕片層A之乾燥，其結果為，容易維持防蝕片層A之柔軟性。 上述菜籽油於上述油中所占之比率較佳為25～60質量%，更佳為35～50質量%。 作為構成上述第3防蝕複合物之油，除沸油及菜籽油以外，亦可列舉石蠟系油、環烷系油、芳香系油、各種蠟等。 其中，較佳為該油中包含乾性油。 作為上述第3防蝕複合物所含有之乾性油，例如可採用亞麻籽油、罌粟子油、桐油、紫蘇油、核桃油、荏油、紅花油、向日葵油等油。 關於上述第3防蝕複合物所含有之乾性油，其一部分或全部亦可為玉米油、棉籽油、芝麻油、大豆油等碘值為100以上且未達130之被稱為「半乾性油」等之油。 又，為了調整此種防蝕片層A之乾燥性等，上述第3防蝕複合物中，亦可適當含有山茶油、橄欖油、蓖麻油、椰子油等碘值未達100之不乾性油。 (防蝕片層A之功能性添加劑(A1b)) 功能性添加劑較佳為含有表面處理材料。 上述表面處理材料較佳為含有矽烷偶合劑、鈦偶合劑、及鋁酸鹽偶合劑之至少任一偶合劑。又，上述表面處理材料更佳為含有下述式(1)所表示之偶合劑。 上述第3防蝕複合物含有無機填充材料、及沸油，進而含有表面處理材料，藉此無機填充材料與沸油容易親和，其結果為，防蝕片層A之表面可變得光滑。又，由於無機填充材料與油容易親和，故而即便無機填充材料含有氫氧化鎂及氫氧化鋁之至少任一者，且上述第3防蝕複合物中之氫氧化鎂及氫氧化鋁之合計含有率為50質量%以上，防蝕片層A之表面亦可變得光滑。 [化1](此處，X為Si或Ti，R1
為經取代或未經取代之碳數6以上之烴基，R2
為甲基或乙基，R3
為甲基或乙基，R4
為甲基或乙基) 上述表面處理材料相對於上述無機填充材料100質量份，較佳為設為1～10質量份，更佳為設為2～6質量份。 進而，上述第3防蝕複合物較佳為含有防銹劑作為上述功能性添加劑。 上述第3防蝕複合物中所包含之防銹劑、無機填充材料、表面處理材料及油之調配比率等可適當決定，相對於油100質量份，較佳為含有1～10質量份之上述防銹劑，尤佳為含有3～8質量份。 又，上述第3防蝕複合物較佳為含有萜烯樹脂作為上述功能性添加劑。藉由使上述功能性添加劑含有萜烯樹脂，可提高防蝕片層A之黏性。 上述萜烯樹脂於上述第3防蝕複合物中所占之比率較佳為3～30質量%，更佳為5～20質量%。 構成第3防蝕複合物之無機填充材料較佳為其一部分或全部為氫氧化鋁粒子，較佳為50質量%以上為氫氧化鋁粒子。 上述功能性添加劑中，與底塗材料同樣地，可進而含有黏度調整劑或各種添加劑。 (防蝕片層A之無機填充材料A2) 構成第3防蝕複合物之無機填充材料中，亦可進而含有氫氧化鎂粒子。 於使無機填充材料含有氫氧化鋁粒子與氫氧化鎂粒子之情形時，其合計量相對於上述油分100質量份，較佳為設為100～250質量份，更佳為設為150～200質量份。 又，氫氧化鋁粒子(ATH)與氫氧化鎂粒子(MDH)較理想為以於第3防蝕複合物中之比率(質量比)成為1：1～2：1(ATH：MDH)之方式含有於第3防蝕複合物中。 進而，於本實施形態中，為了調整防蝕片層A之乾燥性等，上述第3防蝕複合物中，可進而含有環烷酸鈷或環烷酸鈣等乾燥劑。 (保護層B(面塗層B)) 上述保護層B設置於防蝕結構體1之最表面側，以謀求藉由擔載於基材片之第3防蝕複合物而形成之防蝕片層A之表面保護。 該保護層B係藉由將面塗材料塗佈於防蝕片層A之表面並進行乾燥而成之皮膜形成。 上述保護層B之UV透過率較佳為1%以下，更佳為0.5%以下。本實施形態之防蝕結構體1藉由使上述保護層B之UV透過率為1%以下，可抑制上述防蝕片層A中之不飽和油之聚合反應過度進行。其結果為，可將防蝕片層A維持為適度之硬度，從而可抑制防蝕片層A之龜裂。並且，可進一步抑制金屬製構件之腐蝕。 再者，上述UV透過率中之UV(紫外線)意指300 nm之波長。 上述面塗材料較佳為含有黏合劑(B1)與無機填充材料(B2)，且上述無機填充材料含有板狀粒子。 藉此，於形成保護層B時，該板狀粒子可以沿著保護層之平面方向之形態配向。其結果為，可藉由板狀粒子發揮保護層B之阻隔功能。 上述無機填充材料較佳為除上述板狀粒子(實心之板狀粒子)以外，進而含有中空粒子。 藉此，於形成保護層時，中空粒子可密集於保護層B之表面。其結果為，可藉由中空粒子使保護層B之強度變得優異。 以下，更詳細地對各成分進行說明。 (保護層B之黏合劑B1) 面塗材料中所包含之上述黏合劑於形成上述皮膜之前於常溫下為液狀，於塗佈於上述防蝕片層A之表面後進行乾燥、固化而成為該皮膜之主體。 即，構成本實施形態之保護層B之上述皮膜成為使無機填充材料分散於藉由上述黏合劑之固化物而形成之基質中而成之結構體。 本實施形態之上述黏合劑可製成使聚合性單體、聚合性低聚物、及聚合物等聚合物成分溶解於有機溶劑中而成之溶液或使上述聚合物成分分散於水性溶劑中而成之乳膠等。 再者，就因有機溶劑之種類不同而有使上述防蝕片層A溶解或膨潤之虞之方面而言，上述黏合劑較佳為水性乳膠。 於將上述黏合劑設為水性乳膠之情形時，就容易使上述皮膜之基質13a發揮優異之強度之方面而言，該黏合劑較佳為使丙烯酸系聚合物或藉由聚合反應而成為丙烯酸系聚合物之丙烯酸系單體或丙烯酸系低聚物分散於水性溶劑中而成之水性丙烯酸系乳膠。 作為該丙烯酸系單體，例如可列舉一般之成為丙烯酸系樹脂之結構單元之丙烯酸酯類或甲基丙烯酸酯類。 又，作為丙烯酸系低聚物，例如可列舉上述丙烯酸系單體進行多聚體化而成者。 於將上述黏合劑設為水性丙烯酸系乳膠之情形時，該黏合劑中較佳為進而含有聚甲基丙烯酸系之高分子界面活性劑。 於將上述黏合劑設為水性丙烯酸系乳膠之情形時，較佳為含有造膜助劑。 作為面塗材料所含有之上述造膜助劑，例如可列舉：乙基卡必醇、丁基卡必醇、丁基卡必醇乙酸酯、乙基溶纖素、丁基溶纖素、丁基溶纖素乙酸酯、乙酸苄酯、2,2,4-三甲基-1,3-戊二醇單異丁酸酯、乙二醇、二乙二醇丙二醇、己二醇等醇類；丙二醇甲醚、二丙二醇甲醚、三丙二醇甲醚、丙二醇甲醚乙酸酯、二丙二醇甲醚乙酸酯、丙二醇正丙醚、二丙二醇正丙醚、三丙二醇正丙醚、丙二醇正丁醚、二丙二醇正丁醚、三丙二醇正丁醚、丙二醇苯醚、二丙二醇二甲醚、二丙二醇甲醚與丙二醇苯醚之混合物、四丙二醇之甲醚與高級烷醚之混合物等醚類；苄醇等。 (保護層B之無機填充材料B2) 保護層B包含中空粒子作為第1無機物粒子，包含板狀粒子作為上述第2無機物粒子，故而不會成為如上述防蝕片層A般具有明確之界面者，但於形成上述皮膜時，可形成如圖2所示之積層結構。 並且，本實施形態之面塗材料可藉由對防蝕片層A之表面之塗佈、乾燥之單純之製程簡單地形成具有如圖2所示之3層積層結構之皮膜。 關於該點，若一面參照圖3，一面進行說明，則於藉由刮板SC等將面塗材料13x於形成防蝕片層A之防蝕帶12之表面塗開時，該面塗材料13x受到刮板SC所產生之剪切力，而上述板狀粒子13b於該面塗材料13x之剪切方向(與防蝕片層A之表面平行之方向)上配向。 即，於藉由面塗材料13x而形成之濕塗膜中，板狀粒子13b容易成為與防蝕片層A之表面對向之配置。 又，於將面塗材料於防蝕片層A之表面塗開時，黏合劑之凝聚力成為對中空粒子13c之斥力而發揮作用，將該中空粒子13c擠至濕塗膜之表層部。 進而，於包含內包之空隙之中空粒子之表觀密度低於黏合劑之密度之情形時，中空粒子藉由浮力之作用而容易移動至塗膜表面。 並且，隨著中空粒子向塗膜表面移動，而板狀粒子朝向防蝕片層A之表面沈降。 此處，於濕塗膜之表面形成藉由中空粒子而成之凹凸而確保較大之表面積。 因此，於本實施形態中，藉由上述凹凸而使至濕塗膜形成乾燥狀態之皮膜為止之速度提高。 於本實施形態中，可藉由此種簡便之方法使如圖2所示之3層積層結構形成為上述皮膜。 根據上述說明，該皮膜之3層結構中與防蝕片層A之表面接觸之第1層B1中，板狀粒子13b之濃度(質量%)與其他2層相比相對增高，成為上述皮膜之表層部之第3層B3中，上述中空粒子13c之濃度(質量%)與其他2層相比相對增高。 因此，該皮膜之3層結構中構成厚度方向中央部之第2層B2中，上述基質13a之濃度(質量%)與其他2層相比相對增高。 如上所述，本實施形態之防蝕結構體1成為於最表面具有第3層B3且使中空狀之無機物粒子密集於表面之狀態，故而具有優異之表面潤滑性與表面強度。 進而，本實施形態之防蝕結構體1由於使中空狀之無機物粒子密集於最表面，故而隔熱性亦優異。 於使防蝕結構體1發揮此種優異之表面硬度之方面，上述中空粒子13c較佳為球狀粒子，較佳為玻璃微球。 作為該玻璃微球，較佳為將鈉玻璃、二氧化矽、鋁矽酸鹽(白砂、飛灰)等作為原材料之球狀粒子且藉由雷射繞射式粒度分佈測定裝置而求出之中值粒徑(D50)為5～500 μm者，較佳為具有藉由250 μm篩網之篩網殘留部分成為5質量%以下之粒度。 本實施形態之防蝕結構體1沿著防蝕片層A之表面而配向之板狀粒子13b密集於防蝕片層A之附近。 該板狀粒子13b對遮光性或阻氣性等有效地發揮作用。 即，本實施形態之防蝕結構體1可藉由上述板狀粒子13b抑制構成防蝕片層A之第3防蝕複合物之成分通過保護層B而滲出至該防蝕結構體1之外表面。 較佳為含有於防蝕片層A之上述乾性油包含大量不飽和鍵，且具有藉由基於該不飽和鍵切斷之聚合反應之進行而呈乾燥狀態之性質。 因此，本實施形態之防蝕結構體1即便於藉由如上述之第3防蝕複合物形成防蝕片層A之情形時，由於具有使上述板狀粒子13b密集於第1層B1之皮膜，故而亦可抑制太陽光等來自外部之光能量到達至上述防蝕片層A。 即，本實施形態之防蝕結構體1之防蝕片層A藉由光能量而硬化至所需以上之虞較低。 如上所述，本實施形態之防蝕結構體1即便於設置於室外等環境溫度之變化較大且受到太陽光照射之機會較多之場所之情形時，不僅底塗層C之感溫性較低，且因面塗層B亦發揮遮光性，而實現防止自金屬製構件20脫落。 再者，於發揮此種效果之方面，上述板狀粒子較佳為金屬粒子或金屬氧化物粒子，較佳為氧化鐵粒子。 又，板狀粒子13b之平均長度(Lave
)較佳為10～200 μm，平均長度(Lave
)相對於平均厚度(tave
)之比率(Lave
/tave
)較佳為5倍以上且30倍以下。 板狀粒子13b之平均長度(Lave
)或上述比率(Lave
/tave
)例如可藉由掃描型電子顯微鏡(SEM)觀察等求出。 更詳細而言，可以5000倍左右之倍率對板狀粒子13b進行SEM觀察並找出平面方向與觀察方向成為大致平行之(直立狀態之)粒子，求出該粒子於SEM觀察方向上之輪廓形狀，並求出該輪廓形狀中之最長尺寸作為該粒子之長度(L)。 又，可將上述輪廓形狀之面積除以上述長度(L)而求出上述粒子之厚度(t)。 接下來，針對隨機選擇之10個以上之粒子求出長度(L)與厚度(t)，對該等進行算術平均，藉此可求出板狀粒子13b之平均長度(Lave
)與平均厚度(tave
)。 再者，上述面塗材料較佳為將上述板狀粒子13b或上述中空粒子13c於上述皮膜13中以各者之質量比率成為10～30質量%之方式含有。 本實施形態之面塗材料中，除板狀粒子13b或中空粒子13c以外，亦可含有第3無機物粒子(第3無機物粒子)。 作為該第3無機物粒子，例如可列舉如燻製二氧化矽等之實心球狀粒子。 該燻製二氧化矽發揮如下效果：發揮對黏合劑之增黏作用，而抑制在塗佈於防蝕片層A之表面之面塗材料硬化而形成皮膜之前之期間內產生滴液。 於更顯著地發揮該效果之方面，燻製二氧化矽較佳為藉由BET(Brunauer-Emmett-Teller，布厄特)法所得之比表面積為90～300 m2
/g。 再者，藉由BET法所得之比表面積意指依據JIS Z8830：2013(基於氣體吸附之粉體(固體)之BET比表面積測定方法)所測得之值。 上述面塗材料於發揮防蝕帶上之良好之延展性之方面，固形物成分濃度較佳為50質量%以上且70質量%以下，更佳為具有60質量%以上且65質量%以下之固形物成分濃度。 於防止塗佈時之滴液之方面，上述面塗材料較佳為含有燻製二氧化矽，較佳為以1～5質量%之比率含有燻製二氧化矽，較佳為將燻製二氧化矽於無機物粒子中所占之比率設為2～4質量%。 就成為不易分離、不易滴液且不易產生龜裂者之觀點而言，較佳為成為以下之構成。 即，面塗材料較佳為具備板狀粒子與燻製二氧化矽。 又，於面塗材料之板狀粒子中，平均長度相對於平均厚度之比率較佳為7～15。 進而，於面塗材料之燻製二氧化矽中，BET比表面積較佳為100～400 m2
/g，更佳為150～300 m2
/g。 上述面塗材料中，無機物粒子於乾燥皮膜中之比率、即面塗材料中之無機固形物成分於有機固形物成分與無機固形物成分之合計中所占之比率越高，對於形成強度優異之保護層B越有利，但另一方面，越容易使該保護層B產生龜裂等。 因此，上述面塗材料中之無機固形物成分於有機固形物成分與無機固形物成分之合計中所占之比率較佳為50質量%以上且70質量%以下。 又，於將無機固形物成分整體設為100質量%時，上述板狀粒子13b或上述中空粒子13c較佳為以兩者之合計量成為70質量%以上且90質量%以下之方式含有於面塗材料中。 本實施形態之面塗材料藉由包含中空粒子13c，於塗佈於防蝕帶上時於表面形成微小之凹凸而使該表面上之溶劑之揮發性優異，並且藉由含有上述造膜助劑，可於表面快速形成皮膜。 即，本實施形態之面塗材料藉由含有上述造膜助劑而表面乾燥性變得優異。 上述造膜助劑亦對防止面塗層B之龜裂有效，且於面塗材料中所占之比率較佳為5質量%以上。 再者，過度含有上述造膜助劑並不特佳。 因此，上述造膜助劑於面塗材料中所占之比率較佳為10質量%以下。 本實施形態之面塗材料由於係構成防蝕結構體1之最表面者，故而較佳為除上述以外，亦含有紫外線吸收劑或抗氧化劑。 又，關於可使面塗材料中進而含有各種添加劑等之方面，與上述第3防蝕複合物或底塗材料相同。 本實施形態之防蝕結構體係如上所述般構成，因此具有下述優勢。 本實施形態之防蝕結構體係具備覆蓋金屬製構件之防蝕片層A、及覆蓋該防蝕片層A之保護層B之防蝕結構體。 上述防蝕片層A係由防蝕片形成。 上述防蝕片具有基材、及含浸於該基材中之防蝕複合物。 上述防蝕片含有不飽和油作為上述防蝕複合物。 上述保護層B係藉由面塗材料而形成。 上述保護層B之UV透過率為1%以下。 該防蝕結構體藉由上述防蝕片層A含有不飽和油，不飽和油進行聚合反應而硬化。其結果為，不易產生滴液，從而抑制成分自防蝕片層A分離。 又，該防蝕結構體藉由上述保護層B之UV透過率為1%以下，可抑制不飽和油之聚合反應過度進行。其結果為，可將防蝕片層A維持為適度之硬度，從而可抑制防蝕片層A之龜裂。 因此，該防蝕結構體可抑制成分自防蝕片層分離，並且可抑制防蝕片層之龜裂。 根據本實施形態，可抑制成分自防蝕片分離，並且可抑制防蝕片之龜裂。 再者，本發明之防蝕結構體並不限定於上述實施形態。又，本發明之防蝕結構體並不限定於上述作用效果。本發明之防蝕結構體可於不脫離本發明之主旨之範圍內進行各種變更。 [實施例] 以下，列舉試驗例對本發明進而詳細地進行說明，但本發明並不限定於該等。 ＜試驗例1＞ (防蝕結構體之形成) 首先，形成成為比較對象之防蝕結構體(以下，稱為「防蝕結構體A」)。 由該防蝕結構體A保護之金屬製構件使用100A之鋼管。 防蝕結構體A之底塗層之形成係使用將石蠟脂、氧化石蠟脂、凡士林、礦物油以大致等量調配而成之漿料。 將該漿料以成為300 g/m2
之塗佈量之方式塗佈於鋼管之表面而形成底塗層。 於形成防蝕結構體A時，將防蝕帶藉由半繞捲繞於該底塗層上而形成中間層。 又，於形成防蝕結構體A時，使用使包含丙烯酸系乳膠與造膜助劑之液體含浸於聚酯不織布基材中而成之帶件(以下，稱為「乳膠帶」)形成面塗層。 接下來，於形成防蝕結構體A時，於捲繞該乳膠帶之前，將具有17 μm之厚度之聚丙烯樹脂帶捲繞於防蝕帶之外周，藉由聚丙烯樹脂帶形成將中間層與面塗層之間阻斷之阻斷層。 繼而，製作與此種防蝕結構體A分開另外之防蝕結構體(以下，稱為「防蝕結構體B」)。 該防蝕結構體B於將100A之鋼管用作金屬製構件之方面，與防蝕結構體A相同。 另一方面，防蝕結構體B之底塗層使用以聚丁烯為約60質量%、有機膨潤土粒子為約10質量%、滑石粒子為約25質量%之比率包含各者且剩餘部分包含防銹劑等之底塗材料。 接下來，於形成防蝕結構體B時，將防蝕帶半繞於該底塗層(底塗材料：約300 g/m2
)上而形成中間層，且不設置藉由聚丙烯樹脂帶形成之阻斷層而形成面塗層。 再者，形成面塗層時，使用以下之面塗材料，其包含水性丙烯酸系乳膠、造膜助劑、飛灰微球(中空粒子：平均粒徑約150 μm、最大粒徑約400 μm、鬆密度0.7 g/cm3
)、雲母狀氧化鐵(板狀粒子：平均長度約50 μm、平均厚度約5 μm)、及燻製二氧化矽，且固形物成分濃度高於60質量%(有機固形物成分：無機固形物成分≒4：6、質量比)，有機成分之主體係上述水性丙烯酸系乳膠中所包含之丙烯酸系樹脂，無機固形物成分之約80質量%為飛灰微球或雲母狀氧化鐵之任一者，飛灰微球與雲母狀氧化鐵之質量比大約為2：3。 又，面塗層之UV透過率(UV之波長：300 nm)為1%以下。 (作業性) 為了即便於寒冷地區等施工時亦對被黏著體發揮良好之接著性，防蝕帶通常成為於常溫下會感覺到黏膩者。 因此，於形成防蝕結構體A時，捲繞聚丙烯樹脂帶後捲繞乳膠帶。 另一方面，防蝕結構體B之面塗材料為液狀，故而容易直接塗佈於防蝕帶而形成面塗層。 即，防蝕結構體B與防蝕結構體A相比容易製作。 (滲出評價) 使用孔徑(直徑)2 mm之打孔機，於防蝕結構體A、防蝕結構體B之兩者開設到達至鋼管之孔而製成試驗體。 將該試驗體以鋼管之長度方向成為水平方向且孔朝向下方之方式設置於吉爾老化恆溫箱中，並以90℃之溫度加熱3個月。 其結果為，防蝕結構體A於試驗開始後不久觀測到底塗材料之滲出，防蝕結構體B未觀測到滲出。 (熱循環試驗) 使用防蝕結構體B(未利用打孔機開孔者)實施熱循環試驗。 於試驗中，將「40℃×4小時」與「110℃×4小時」之合計8小時設為1次循環，對防蝕結構體B施加50次循環之熱循環。 其結果為，於防蝕結構體B完全未發現滲出或其他外觀上之異常。 (低溫龜裂試驗) 將金屬製構件變更為25A之鋼管，製作具有與防蝕結構體A相同構成之防蝕結構體(以下，稱為「防蝕結構體a」)、及具有與防蝕結構體B相同構成之防蝕結構體(以下，稱為「防蝕結構體b」)。 該防蝕結構體a及防蝕結構體b係於在氣溫2℃下出現降雪之冬季之室外製作。 將防蝕結構體a及防蝕結構體b直接於室外放置一夜，第二天確認各者之狀態。再者，放置該等當天之夜間之氣溫為-4℃。 其結果為，防蝕結構體a於表面發現大量龜裂，相對於此，防蝕結構體b幾乎未發現龜裂。 (面塗材料之組成研究) 關於防蝕結構體B，對變更面塗材料之組成之情況進行了研究。 首先，製作面塗材料(以下稱為「面塗材料#1」)，該面塗材料除添加相當於面塗材料之約1成之水而使水分量增大以外，組成與用於形成防蝕結構體B之面塗材料(以下，稱為「面塗材料#0」)相同。 該面塗材料#1之固形物成分濃度低於60質量%，且防蝕帶上之塗佈性優異，但容易產生滴液而難以形成厚度均勻之面塗層。 又，於製備面塗材料#1時，期待於較早之階段添加燻製二氧化矽而發揮觸變性，但於該面塗材料#1之評價中，結果如上所述般產生滴液。 繼而，製作將加水之比率設為約0.8成(約8分)而並非約1成之面塗材料(以下，稱為「面塗材料#2」)。 於該面塗材料#2之評價中，雖與面塗材料#1相比輕微，但亦產生滴液。 繼而，製作水分量與面塗材料#0相同但所使用之飛灰微球之種類不同之面塗材料。 此處所使用之飛灰微球較面塗材料#0中所使用之飛灰微球包含更多之粗大粒子。 利用250 μm篩網將該飛灰微球篩分成篩網殘留部分(粗粒)與篩網通過部分(細粒)。 製備以下之3種面塗材料：使用篩網殘留部分之面塗材料(以下，稱為「面塗材料#3」)、使用篩網通過部分之面塗材料(以下，稱為「面塗材料#4」)、及未進行篩分而直接使用上述飛灰微球之面塗材料(以下，稱為「面塗材料#5」)。 該面塗材料#3～面塗材料#5於形成面塗層時，表現出優異之塗佈性，並且未產生滴液。 但是，藉由面塗材料#3及面塗材料#5而形成之面塗層於表面觀察到原因視為存在粗大粒子之凹凸，與藉由面塗材料#4而形成之面塗層相比，外觀較差。 製作對該面塗材料#4進行約4分之加水之面塗材料(以下，稱為「面塗材料#6」)、及對面塗材料#4進行約0.4成(約4分)之加水並且進行了造膜助劑之增量之面塗材料(以下，稱為「面塗材料#7」)。 再者，面塗材料#6及面塗材料#7之固形物成分濃度約為60質量%，面塗材料#6之造膜助劑之濃度低於5質量%，相對於此，面塗材料#7之造膜助劑之濃度高於5質量%。 面塗材料#6及面塗材料#7均不存在滴液，而於形成面塗層時均表現出優異之塗佈性。 但是，針對面塗材料#1～面塗材料#7，進行於形成面塗層後於5℃之環境下保持8小時之評價，結果僅藉由面塗材料#6而形成之面塗層於表面發現破裂。 根據以上說明，可確認固形物成分濃度為60質量%以上且造膜助劑之濃度為5質量%以上於使濕塗膜及乾燥皮膜成為良好之狀態之方面有利。 (耐候性評價) 模擬上述防蝕結構體B，形成用於藉由Suga Test Instruments公司製造之碳弧式耐候性試驗機「Sunshine weather meter」對耐候性進行評價之試驗體。 具體而言，準備如圖4所示者。 再者，圖4之左圖係耐候性試驗之試驗體之俯視圖，右圖表示沿左圖之I-I線方向觀察之剖視圖。 亦如該圖所示，於製作耐候性試驗之試驗體時，準備厚度0.6 mm×寬度70 mm、長度150 mm之不鏽鋼板BP(材質：SUS304)，將正方形之鋼板SP放置於該不鏽鋼板BP之中央部，以自其上方利用底塗材料覆蓋整個該鋼板SP之方式於50 mm×100 mm之範圍內形成底塗層C。 於該底塗層C上積層2片相同面積(50 mm×100 mm)之防蝕帶而形成防蝕片層A，進而自其上方利用面塗材料形成面塗層B。 再者，該防蝕帶之防蝕複合物係將沸油、菜籽精製油及氫化萜烯樹脂混合而成者。沸油、菜籽精製油及氫化萜烯樹脂之質量比成為1：1：2。又，面塗層之UV透過率(UV之波長：300 nm)為1%以下。 將該試驗體安裝於「Sunshine weather meter」之試樣保持器，於黑面板溫度63℃、降雨條件為120分鐘中降雨18分鐘之條件下實施1000小時之耐候性試驗。 試驗後觀察面塗層B之表面狀態或滲出，然後將試驗體解體而確認內部之鋼板中之鏽之產生。 其結果為，關於面塗層B，於外觀上並未特別發現因碳弧之照射所導致之劣化。 又，未發現自試驗體之滲出。 進而，自試驗體取出之鋼板未產生銹。 根據該情況，確認該防蝕結構體具有優異之耐候性，於實際使用中可長期持續地發揮優異之防蝕性能。 ＜試驗例2＞ 使用下述材料製作下述表1所示之底塗材料。 聚丁烯A：數量平均分子量640 聚丁烯B：數量平均分子量1500 膨潤土A：經有機處理 膨潤土B：未經處理 滑石A：中值粒徑250 μm 滑石B：中值粒徑50 μm 防銹劑 (防蝕結構體之製作) 形成防蝕結構體。 由該防蝕結構體保護之金屬製構件使用100A之鋼管。 形成防蝕結構體之底塗層時，使用下述表1之底塗材料。 將該底塗材料以成為300 g/m2
之塗佈量之方式塗佈於鋼管之表面而形成底塗層。 又，藉由半繞將防蝕帶捲繞於該底塗層上而形成中間層。 進而，使用使包含丙烯酸系乳膠與造膜助劑之液體含浸於聚酯不織布基材中而成之帶件(以下，稱為「乳膠帶」)形成面塗層。 接下來，於捲繞該乳膠帶之前，將具有17 μm之厚度之聚丙烯樹脂帶捲繞於防蝕帶之外周，藉由聚丙烯樹脂帶形成將中間層與面塗層之間阻斷之阻斷層。 接下來，針對各試驗例之底塗材料進行下述評價試驗。將結果示於表1。 (滲出之難易度) 使用孔徑(直徑)2 mm之打孔機，於防蝕結構體開設到達至鋼管之孔而製成試驗體。將該試驗體以鋼管之長度方向成為水平方向且孔朝向下方之方式放置於吉爾老化恆溫箱中，並以90℃之溫度加熱3個月。 ○：未觀察到底塗材料之滴落，又，亦未觀察到底塗材料向表面滲出。 △：未觀察到底塗材料之滴落，但觀察到底塗材料向表面滲出。 ×：觀察到底塗材料之滴落。 (施工性) 將底塗材料塗佈於鋼管時之底塗材料之延伸程度(藉由目視之評價) ○：充分地延伸 △：略微延伸 ×：不延伸 [表1]
如表1所示，於使用試驗例2-5之底塗材料之防蝕結構體中未觀察到滲出。又，試驗例2-5之底塗材料之施工性良好。 ＜試驗例3＞ 使用下述表2、3之材料製作表2、3所示之防蝕膠黏劑。 接下來，進行下述評價試驗。將結果示於表2、3。 (稠度) 防蝕膠黏劑於0℃、20℃、40℃下之稠度係利用上述方法進行測定。 (坍落度試驗) 關於上述防蝕膠黏劑之熱變形性，利用如於圖5中模式性地表示之方法進行評價試驗。 首先，使用截切刀自防蝕膠黏劑之塊切取25 mm×25 mm×100 mm之方棒狀試樣製成評價用試樣(S)。 繼而，準備2根25 mm×25 mm之L形角鋼材(L)，將其等如圖5所示般隔開50 mm之距離平行地配置於頂面大致成為水平之作業台(D)上。 繼而，將評價用試樣S以長度方向成為與上述角鋼材L正交之方向之方式載置於角鋼材L上，而藉由2根角鋼材L分別支持該評價用試樣S之距端部約為25 mm內側之位置。 於該狀態下將環境溫度設為80℃，觀察12小時後之變形程度。 關於變形程度，測定於2根角鋼材L之間防蝕膠黏劑下垂最大之距離(變形距離)。 [表2]
[表3]
於相對於油分100質量份含有20質量份以上之有機膨潤土粉末且氫氧化鋁粉末相對於碳酸鈣粉末之質量比為1.08～1.33之試驗例3-1～3-8之防蝕膠黏劑中，與試驗例3-9、3-11、3-12相比，坍落度試驗中之變形距離較小。 因此，得知試驗例3-1～3-8之防蝕膠黏劑適合用於表面溫度成為高溫(例如80℃)之配管之膩子掩埋等。 又，於試驗例3-1～3-8之防蝕膠黏劑中，與試驗例3-10、3-12相比，0℃下之稠度較高為30以上。 因此，得知試驗例3-1～3-8之防蝕膠黏劑之冬季之施工優異。 進而，於試驗例3-1～3-8之防蝕膠黏劑中，與試驗例3-9、3-11相比，40℃下之稠度較低為150以下。 因此，得知試驗例3-1～3-8之防蝕膠黏劑適合於夏季使用。 ＜試驗例4＞ 使用下述材料製作下述表4、5所示之面塗材料。 再者，飛灰微球係利用250 μm篩網篩分成篩網殘留部分(粗粒)與篩網通過部分(細粒)。 水性丙烯酸系乳膠 飛灰微球A：未進行篩分者 飛灰微球B：篩網通過部分(細粒) 飛灰微球C：篩網殘留部分(粗粒) 鋁矽酸鹽系中空微球(Phyllite 52/7FG) 板狀粒子A：平均長度120 μm、平均長度相對於平均厚度之比率為10之雲母狀氧化鐵 板狀粒子B：平均長度50 μm、平均長度相對於平均厚度之比率為3之雲母狀氧化鐵 碳酸鈣 燻製二氧化矽A：BET比表面積200 m2
/g 燻製二氧化矽B：BET比表面積50 m2
/g 造膜助劑 水 其他添加劑 接下來，進行下述評價試驗。將結果示於表4、5。 (黏度) 關於黏度，藉由B型黏度計(單一圓筒形旋轉黏度計)(轉子：No.3)，測定轉數為20 rpm時、及轉數為2 rpm時之黏度(JIS Z8803：2011)。 又，觸變指數(TI值)係利用下述式求出。 TI值＝2 rpm時之黏度/20 rpm時之黏度 (分離之難易度) 將試驗例之面塗材料於5℃下放置12小時。接下來，目視觀察分離之難易度。 ×：目視確認到大幅分離。 ○：×以外。 (產生滴液之難易度、及產生龜裂之難易度) 於5℃下將帶件捲繞於沿垂直方向延伸之圓柱物，並於帶件表面塗佈試驗例之面塗材料。 接下來，目視確認產生滴液之難易度。 ○：未確認到滴液。 △：確認到微量之滴液。 ×：確認到多於「△」評價之滴液。 又，塗佈後將面塗層於5℃下放置8小時，目視確認面塗層有無龜裂。 ○：未確認到龜裂。 △：確認到少量龜裂。 ×：確認到多於「△」評價之龜裂。 (塗裝外觀) 於常溫(25℃)下將帶件捲繞於沿垂直方向延伸之圓柱物，並於帶件表面塗佈試驗例之面塗材料。接下來，於4小時後目視觀察外觀。 ×：確認到龜裂。 △：未確認到龜裂，但表面粗糙。 ○：×、△以外 (綜合評價) ×：成為×之項目有至少一個之情形 △：所有項目中均不存在×且成為△之項目有至少一個之情形 ○：所有項目中均為○之情形 [表4]
[表5]
如表4所示，得知具備平均長度相對於平均厚度之比率為7～15之板狀粒子、及BET比表面積為100～400 m2
/g之燻製二氧化矽之試驗例5-1～5-5之面塗材料不易分離、不易產生滴液、且不易產生龜裂。 又，如表4、5所示，得知試驗例5-1～5-5之面塗材料與水之含有比率較高之試驗例5-9、5-10相比，不易分離，且不易產生滴液。 [相關申請案之相互參照] 本申請案主張日本專利特願2017-068964號之優先權，且藉由引用而併入至本案說明書之記載中。Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. The anticorrosive structure of the present embodiment has two or more layers. Further, as shown in FIG. 1, the corrosion-resistant structure 1 of the present embodiment includes an etching resist layer A covering the metal member 20 and a protective layer B covering the etching resist layer A. The anti-corrosion sheet layer A is formed of an anti-corrosion sheet. The protective layer B is formed by a top coat material. The anti-corrosion structure 1 of the present embodiment is provided with the anti-corrosion sheet layer A, whereby the thickness of the anti-corrosion structure 1 itself is easily increased, and as a result, drying of the inside of the anti-corrosion structure 1 is easily suppressed. Further, the corrosion-resistant structure 1 of the present embodiment has an advantage that the corrosion resistance is easily exhibited. The corrosion-resistant structure 1 of the present embodiment is provided with the protective layer B, whereby the deterioration of the corrosion-resistant sheet layer A can be suppressed, and as a result, the weather resistance is excellent. Further, the corrosion-resistant structure 1 of the present embodiment is provided with the protective layer B, whereby the advantage of suppressing the peeling of the corrosion-resistant sheet layer A is obtained. Further, the anti-corrosion structure 1 of the present embodiment is provided with the protective layer B, whereby the anti-friction property is excellent. Further, the corrosion-resistant structure 1 of the present embodiment further includes an anti-corrosion slurry layer C (hereinafter also referred to as "undercoat layer C") formed of an anti-corrosion slurry (hereinafter also referred to as "primer material"). The anti-corrosion slurry layer C is formed on the side of the metal member 20 from the anti-corrosion sheet layer A, and is in contact with the surface of the metal member 20. The anti-corrosion structure 1 of the present embodiment is provided with the undercoat layer C, and thus has an advantage of being easily adhered to the metal member 20 and having excellent corrosion resistance. Further, in the case where at least one of the uneven portion and the irregular portion is present on the surface of the metal member 20, the corrosion-resistant structure 1 of the present embodiment preferably further includes an anti-corrosive adhesive layer D formed of an anti-corrosive adhesive. The anti-corrosive adhesive layer D is formed on the side of the metal member more than the anti-corrosion sheet layer A. Further, the anti-corrosive adhesive layer D is disposed between the etching resist layer A and the anti-corrosion slurry layer C. In the anti-corrosion structure 1 of the present embodiment, the anti-corrosion adhesive layer D is provided in accordance with the shape of the uneven portion or the irregular portion of the metal member 20, whereby the construction of the anti-corrosion sheet layer A is advantageous. Further, in the corrosion-resistant structure 1 of the present embodiment, the corrosion-resistant adhesive layer D is provided in accordance with the shape of the uneven portion or the irregular portion of the metal member 20, whereby the adhesion to the metal member 20 is improved. Further, the anti-corrosion structure 1 of the present embodiment is provided with the above-described anti-corrosion adhesive layer D, whereby the construction time of the anti-corrosion structure 1 can be shortened. In other words, when the anti-corrosion structure does not have the anti-corrosion adhesive layer, when the anti-corrosion sheet is wound around the metal member 20, the air in the uneven portion or the irregular portion of the metal member 20 easily enters the metal member 20 and The anti-etching sheet or the anti-etching sheet is between each other. In this case, in order to improve the corrosion resistance, an operation of forming an anti-corrosion sheet while forming a slit in the etching resist to allow the air to escape is generated. However, the corrosion-resistant structure 1 of the present embodiment includes the above-described corrosion-resistant adhesive layer D, whereby the operation for escaping air can be easily avoided, and the advantage of the construction time of the corrosion-resistant structure 1 can be shortened. According to the above description, the corrosion-resistant structure 1 of the present embodiment can easily maintain the corrosion resistance by having the above advantages. The above-described metal member 20 can be used as a line for conveying a fluid. The metal member 20 includes a plurality of cylindrical tubes having the flange portions 21 and the tubes are connected to each other by the flange portion 21. The flange portions 21 of the adjacent tubes are fixed to each other by bolts 22 and nuts 23. In other words, the metal member 20 has a cylindrical shape, and the flange portion 21, the bolt 22, the nut 23, and the like are formed with irregularities on the outer surface. Hereinafter, each layer will be described in detail. (C: Anti-corrosion slurry layer (undercoat layer)) The undercoat layer C described above can be formed by applying a primer material to the surface of the metal member 20. Specifically, the undercoat layer C can be formed by coating a primer material thinly on the entire outer surface of the cylindrical metal member 20. The outer surface of the undercoat layer C is formed with irregularities by the irregularities of the above-described metal member. The undercoat layer C is usually formed to have an average thickness of 0.01 to 10 mm. The first anticorrosive composite (anticorrosive slurry) (primer material) C constituting the undercoat layer C contains an organic binder C1 and an inorganic filler C2 containing a rust preventive agent or the like. When the workability or the filling property at the time of coating on the surface of the metal member 20 is taken into consideration, the primer material preferably has a higher value of "consistency" in the normal temperature region. In the present specification, the "consistency" means a value measured based on JIS K2235-1991 ""Petroleum Wax 5.10 Consistency Test Method". Specifically, the "consistency" of the undercoat material of the present embodiment at 20 ° C is preferably 150 or more, more preferably 200 or more, and still more preferably 250 or more. Further, in consideration of the winter construction, the "consistency" of the undercoat material of the present embodiment at 0 ° C is preferably 100 or more, more preferably 150 or more, and still more preferably 200 or more. Further, in consideration of the fact that the corrosion-resistant belt 12 is firmly fixed to the metal member, the value of the "consistency" of the primer material is not necessarily high. It is especially preferred that the primer material has a certain "consistency" even when heated. Specifically, the "consistency" of the undercoat material of the present embodiment at 20 ° C is preferably 400 or less, more preferably 350 or less, and still more preferably 300 or less. Further, the "consistency" of the undercoat material at 40 ° C is preferably 500 or less, more preferably 450 or less, and still more preferably 400 or less. Also, set the value of "consistency" at 0 °C to N. 0 Set the value of "consistency" at 20 °C to N 20 In the case of the undercoat material of the present embodiment, the low-temperature temperature resistance represented by the following formula (2) is preferably 0.6 or more, more preferably 0.75 or more. Low temperature temperature ratio =[N 0 /N 20 ]・・・(2) Also, set the value of "consistency" at 40 °C to N. 40 In the case of the undercoat material of the present embodiment, the high temperature temperature resistance represented by the following formula (3) is preferably 2 or less, more preferably 1.5 or less. In addition, the lower limit of the low temperature temperature sensitivity ratio and the lower limit of the high temperature temperature sensitivity ratio are usually "1.0". High temperature temperature ratio =[N 40 /N 20 ] (3) Hereinafter, each component will be described in more detail. (C1: Organic binder in the undercoat material) The undercoat material of the present embodiment is a polybutene in order to exhibit such temperature characteristics, and the main component of the organic binder C1. Further, a part of the inorganic filler described below is an organically treated bentonite particle. As the polybutene, a general polybutene can be used, and a copolymer obtained by reacting isobutylene as a main component and 1-butene or 2-butene can be used as a liquid at normal temperature (23 ° C). a chain hydrocarbon compound. Considering the workability of coating a primer material on the surface of a metal member in a low temperature environment such as outdoors in winter, the above polybutene is based on JIS K2269:1987 "Pour point of crude oil and petroleum products and fog of petroleum products" The pour point measured by the "point test method" is preferably 5.0 ° C or lower, more preferably 2.5 ° C or lower. Further, in consideration of suppressing excessive fluidity of the primer material, the flow point of the polybutene is preferably -7.5 ° C or higher, more preferably -5.0 ° C or higher. The above polybutene is preferably 10 mm based on JIS K2283:2000 "Crude oil and petroleum products - Dynamic viscosity test method and viscosity index calculation method" at 40 ° C. 2 /s above and 3000 mm 2 /s or less, more preferably 50 mm 2 /s above and 1500 mm 2 /s below. The number average molecular weight of the polybutene is preferably from 300 to 3,000, more preferably from 500 to 2,000, still more preferably from 700 to 2,000, still more preferably from 1,000 to 2,000. Incidentally, the "number average molecular weight" of the polybutene in the present specification means the molecular weight determined by gel permeation chromatography (GPC). More specifically, the "number average molecular weight" means a value measured by the following conditions. <Molecular weight determination method> GPC apparatus: HLC-8120GPC (column: TSKgel SuperHZM-H/HZ4000/HZ3000/HZ2000, column size: 6.0 mm ID × 150 mm), detector: differential refractive index detector (RI), The conditions for GPC production by Tosoh Corporation: mobile phase tetrahydrofuran, flow rate 0.6 mL/min, column temperature 40 ° C, sample concentration 1.0 g/L, injection volume 20 μL. The organic binder in the primer material preferably contains the above. The polybutene is 40% by mass or more, more preferably 45% by mass or more, and still more preferably 50% by mass or more. The organic binder may further contain, as a component other than polybutene, polyisoprene which is liquid at normal temperature or polybutadiene which is liquid at normal temperature. Further, the preferred flow point or dynamic viscosity of polyisoprene or polybutadiene is common to the above polybutene. Further, the organic binder may further contain a paraffinic oil, a naphthenic oil, an aromatic oil, various waxes, or the like. In addition, examples of the rust preventive agent constituting the organic binder include an inorganic rust preventive and an organic rust preventive. Examples of the inorganic rust inhibitor include chromate, nitrite, citrate, phosphate, polyphosphate, and the like. Examples of the organic rust inhibitor include tannic acid, carboxylic acid (oleic acid, dimer acid, naphthenic acid, etc.), metal carboxylic acid soap (calcium lanolin, zinc naphthenate, calcium oxidized wax, oxidation). Wax, etc.), sulfonate (sodium sulfonate, calcium sulfonate, sulfonate sulfonate, etc.), amine salt, ester (ester obtained by reaction of higher fatty acid with glycerol, sorbitan monoisostearate, sorbus Sugar alcohol anhydride monooleate, etc.). Among them, it is preferable that the above-mentioned primer material contains the above-mentioned tannic acid and a gasifying rust preventive agent. As the above tannic acid, tannic acid derived from gallnut is preferred. Examples of the vaporized rust preventive agent include various salts of amines (for example, nitrites, carboxylates, chromates) or esters of carboxylic acids. Specifically, the primer material may contain benzotriazole, tolyltriazole, dicyclohexylammonium nitrite, dicyclohexylammonium salicylate, monoethanolamine benzoate, dicyclohexylammonium benzoate, benzoic acid. Diisopropylammonium, diisopropylammonium nitrite, cyclohexylamine carbazate, nitronaphthalene nitrite, cyclohexylamine benzoate, dicyclohexylammonium cyclohexanecarboxylate, cyclohexanecarboxylic acid ring Hexylamine, dicyclohexylammonium acrylate, cyclohexylamine acrylate or the like is used as a vaporization rust inhibitor. The vaporization rust inhibitor contained in the primer material may be two or more. The organic binder may contain, in addition to these, a resin as a viscosity modifier: for example, a xylene resin, a rosin or a polymerized rosin, a hydrogenated rosin, a rosin ester, or the like, a modified rosin resin; a terpene resin, a phenol resin, and a rosin phenol; Terpene resin such as resin; aliphatic, aromatic or alicyclic petroleum resin; smoked cocoon resin, styrene resin, alkylphenol resin, and the like. Further, in order to improve the affinity between the inorganic filler and the oil contained in the organic binder, the organic binder may contain a coupling agent or a surfactant. Examples of the coupling agent include a decane coupling agent and a titanate coupling agent. As the above surfactant, a fatty amine can be mentioned. The fatty amine is preferably a fatty amine having a carbon number of 10 or more. Further, the carbon number can be measured by liquid chromatography mass spectrometry (LC/MS) or gas chromatography mass spectrometry (GC/MS). Further, the organic binder may suitably contain various additives such as an antioxidant, an anti-aging agent, an anti-fungal agent, an insect repellent, a rodenticide, an antibacterial agent, and a pigment. (C2: Inorganic filler in the undercoat material) The inorganic filler which constitutes the undercoat material together with the organic binder contains the organicized bentonite particles (hereinafter also referred to as "organic bentonite particles") as described above. . Further, as the organic bentonite particles, various cations which are present between the crystal layers of bentonite and quaternary ammonium ions such as bis(hydrogenated tallow) dimethylammonium chloride or cetyl cetyltrimethylammonium bromide are commercially available. Ion exchange is the result. Such a commercially available product can be contained in the first anticorrosive composite of the present embodiment. The inorganic filler may contain plate-like mineral particles such as mica particles or sericite particles separately from the organic bentonite particles. In addition, the inorganic filler may contain titanium dioxide particles, zinc oxide particles, graphite particles, carbon black particles, iron oxide particles or the like for the purpose of coloring the undercoat material or the like. Further, the inorganic filler may contain talc particles, aluminum hydroxide particles, calcium carbonate particles, clay particles, alumina particles, or the like. The above organic bentonite particles are components effective for causing the undercoat material to exhibit thixotropy. Further, even if the organic binder exhibits high fluidity, the organic bentonite particles may be dispersed in the organic binder to form a gel. Moreover, even if the organic binder is greatly improved in fluidity when heated, the gel formed by dispersing the organic bentonite particles maintains the gel state as long as it is not excessively heated. Further, since the gel exhibits thixotropic properties as described above, when the shearing force is applied, the apparent viscosity is largely lowered. Therefore, the organic bentonite particles are effective for making the undercoat material excellent in the adhesion between the corrosion-resistant adhesive layer D and the metal member 20, and the surface of the underlying coating material is improved on the surface of the metal member 20. It is also an effective ingredient in the workability when it is applied. When the content of the organic binder contained in the primer material is 100 parts by mass, the organic bentonite particles are preferably contained in the primer material in an amount of 5 parts by mass or more and 40 parts by mass or less, more preferably It is contained in the undercoat material in such a manner that it is 10 parts by mass or more and 25 parts by mass or less. Furthermore, the organic bentonite particles are preferably contained in the undercoat material so that the ratio of the inorganic filler is 15% by mass or more and 40% by mass or less. When the particle diameter of the above-mentioned organic bentonite particles is too large, it is difficult to sufficiently exhibit the gelation performance in the organic binder even at the same compounding amount. In this case, the organic bentonite particles are preferably passed through a sieve (the remaining portion of the screen is 5% by mass or less) when the sieve is sieved by a 450 mesh (32 μm sieve) in a dry state. Further, the organic bentonite particles are not limited to those of other inorganic fillers such as the talc particles, and even if the particle size is too large, even if the same amount is used, compared with the case where the particle size is finer, There is a tendency to make the undercoat material sticky and cause workability when the surface of the metal member is coated. In the inorganic filler other than the organic bentonite particles, the titanium oxide particles, the zinc oxide particles, the graphite particles, the carbon black particles, and the iron oxide particles are preferably used in an amount of 100 parts by mass per 100 parts by mass of the organic binder. The content is 0.1 part by mass or more and 5 parts by mass or less, and is contained in the undercoat material, and more preferably 0.5 part by mass or more and 1.5 parts by mass or less. The talc particle reinforced primer material in the inorganic filler other than the organic bentonite particles is excellent in effect and imparts shape retaining property to the undercoat material. When the content of the organic binder contained in the primer material is 100 parts by mass, the talc particles are preferably contained in an amount of 20 parts by mass or more and 80 parts by mass or less, more preferably 30 parts by mass. It is contained in the form of a part or more and 60 mass parts or less. In addition, the talc particles are preferably contained in the undercoat material so that the ratio of the inorganic filler is 55% by mass or more and 80% by mass or less. In order to make the undercoat material excellent in workability, the talc particles are preferably obtained by a laser diffraction type particle size distribution measuring device to have a median diameter of preferably 1 μm or more and 100 μm or less, more preferably 1 It is not more than μm and not more than 50 μm, and more preferably 10 μm or more and 40 μm or less. In addition, as the talc particles, those which pass through a sieve (the residual portion of the screen is 1% by mass or less) when sieved by a 75 μm sieve are preferably used. The undercoat material preferably has a lower temperature sensitivity as described above. Therefore, in the preparation of the primer material, it is preferred to temporarily knead a mixture of organic bentonite particles and an organic binder before mixing all the preparations to prepare a gel and apply the gel to the gel. The mixture was added to the mixture to carry out kneading. When the temperature is, for example, about 40 to 50 ° C, the undercoat material prepared as described above does not drip from the surface of the metal member, and exhibits good shape retention even in summer. (Anti-corrosion Adhesive Layer D) The above-mentioned anti-corrosion adhesive layer D is formed by filling an anti-corrosion adhesive (second anti-corrosion compound) into the concave portion of the anti-corrosion slurry layer C to reduce the unevenness of the undercoat layer C. . Further, the above-mentioned corrosion-resistant adhesive layer D can be embedded in the gap between the undercoat layer C and the etching resist layer A, and the corrosion of the metal member 20 can be suppressed. The above-mentioned anti-corrosion adhesive contains an oil component of the binder (D1) and an inorganic filler (D2). The binder contains a liquid rubber which is liquid at normal temperature and normal pressure (for example, 20 ° C, 1 atm). The binder preferably contains the above liquid rubber as a main component. The oil component of the above-mentioned binder is more preferably contained in an amount of 60% by mass or more and 100% by mass or less of the entire oil component, and more preferably 70% by mass or more and 100% by mass or less of the entire oil component. The above liquid rubber. Further, the anti-corrosion adhesive preferably contains an organic compound containing active hydrogen as the binder, and the active hydrogen-containing organic compound has a functional group having an active hydrogen. The organic compound containing an active hydrogen may, for example, be an organic compound having a functional group such as a hydroxyl group, an amine group, a carboxyl group or a thiol group. The above-mentioned anti-corrosion adhesive has an organic compound containing active hydrogen, whereby viscosity can be increased, and as a result, separation of components can be suppressed. The above-mentioned anticorrosive adhesive contains the above active hydrogen-containing organic compound in an amount of preferably 5 to 40% by mass, more preferably 10 to 25% by mass. The above active hydrogen-containing organic compound is preferably an organic compound containing a hydroxyl group having a hydroxyl group. Further, from the viewpoint of easily making the corrosion-resistant adhesive into a desired property, it is preferred that part or all of the liquid rubber is an organic compound containing a hydroxyl group. Further, the active hydrogen-containing organic compound may be contained in the above-mentioned anti-corrosion adhesive as a separate component from the above-mentioned liquid rubber. Examples of the active hydrogen-containing organic compound which is a separate component from the above liquid rubber include alcohols (for example, ethanol, methanol, etc.), amines (for example, methylamine, dimethylamine, etc.), and saturated fatty acids (for example). For example, butyric acid, valeric acid, etc.), unsaturated fatty acids (such as oleic acid, palmitoleic acid, etc.), cysteine, and the like. Further, examples thereof include derivatives of alcohols, derivatives of amines, derivatives of saturated fatty acids, derivatives of unsaturated fatty acids, and derivatives of cysteine. Examples of the liquid rubber include liquid polyisoprene (D1a1), liquid polybutadiene (D1a2), liquid polyalphaolefin (D1b), liquid polyoxyethylene rubber, and liquid chloroprene. Diene rubber, liquid styrene-butadiene rubber, liquid acrylonitrile-butadiene rubber, liquid ethylene-propylene rubber, liquid urethane rubber, liquid fluororubber, and the like. As described above, the liquid rubber preferably contains a liquid rubber as an organic compound containing active hydrogen from the viewpoint of easily forming the corrosion-resistant adhesive into a desired property and suppressing separation of components. The liquid rubber preferably contains at least one of liquid polyisoprene and liquid polybutadiene. Further, the liquid rubber preferably contains at least one of a liquid polyisoprene having a hydroxyl group at a molecular terminal and a liquid polybutadiene having a hydroxyl group at a molecular terminal as the hydroxyl group-containing organic compound. Further, the liquid rubber preferably contains a liquid polyalphaolefin (D1b). As the inorganic filler, it is preferred to contain an organicized bentonite powder (organic bentonite powder) (D2a) in the anti-corrosion adhesive. Further, in the present embodiment, it is preferable that the anti-corrosion adhesive further contains aluminum hydroxide powder (D2b) and calcium carbonate powder (D2c) as the inorganic filler. Further, in terms of suppressing the separation of the above-mentioned corrosion-resistant adhesive, the liquid polyisoprene and the liquid polybutadiene preferably have a hydroxyl group at the molecular terminal, and more preferably have a hydroxyl group at both ends of the molecule. The hydroxy group is effective for binding the liquid polyisoprene and the liquid polybutadiene to the organicized bentonite powder (hereinafter also referred to as "organic bentonite powder") to be in a gel state. Functional group. The liquid polyalphaolefin generally has a comb-like molecular structure, and in the present embodiment, it is used to adjust the oil content to a moderate viscosity. The oil component of the above-mentioned binder is preferably contained in an amount of 60% by mass or more and 100% by mass or less, based on the total of the liquid polyisoprene and the liquid polybutadiene, and more preferably 70% by mass or more. And 100% by mass or less. When the above-mentioned anti-corrosion adhesive contains the above liquid poly-α-olefin, the liquid poly-α-olefin is preferably used in that the adhesive can be adjusted to a moderate viscosity to make the anti-corrosion adhesive work well. The content is contained in an amount of 10 parts by mass or more and 40 parts by mass or less based on 100 parts by mass of the total of the liquid polyisoprene and the liquid polybutadiene. Hereinafter, each component will be described in more detail. (D1) Binder (D1a1) Liquid polyisoprene As the above liquid polyisoprene, generally 80% or more of the cis-1,4 bond can be used, and it is suitable to be based on ASTM D 2503. The number average molecular weight is from 1,000 to 4,000 and the viscosity at 30 ° C is from 5 to 10 Pa·s. Further, the number average molecular weight is determined in accordance with ASTM D 2503. Further, regarding the viscosity, the viscosity at a rotation number of 50 rpm was measured by a B-type viscometer (single cylindrical rotational viscometer) (rotor: No. 4) (JIS Z8803: 2011). Further, as the liquid polyisoprene, the hydroxyl value is preferably from 30 to 60 mgKOH/g, and the bromine number is preferably from 150 to 300 g/100 g. In addition, the value of the "hydroxy value" in the present embodiment means a method based on JIS K1557-1:2007 "Test method for plastic-polyurethane raw material polyol - Part 1: Method for determining hydroxyl value" The value of the measurement. In addition, the value of the "bromine number" in the present embodiment means a value measured based on JIS K2605-1996 "Petroleum Products - Bromine Value Test Method - Electro-Titration Method". (D1a2) liquid polybutadiene as the liquid polybutadiene, preferably 70% or more and 90% or less of the polybutadiene is 1,4 bond and substantially does not contain 1,3 bond, The remaining part is the 1, 2 button. Further, the liquid polybutadiene is preferably one having a number average molecular weight of from 2,000 to 4,000 and a viscosity at 30 ° C of from 1 to 10 Pa·s. Further, the number average molecular weight is determined in accordance with ASTM D 2503. Further, regarding the viscosity, the viscosity at a rotation number of 50 rpm was measured by a B-type viscometer (single cylindrical rotational viscometer) (rotor: No. 4) (JIS Z8803: 2011). Further, as the liquid polybutadiene, the hydroxyl value is preferably 40 to 60 mgKOH/g, and the bromine number is preferably 200 to 300 g/100 g. (D1b) The liquid poly-α-olefin is preferably a liquid poly-α-olefin, and is preferably a polymer having a carbon number of 6 to 14 and having a total carbon number of 30 to 50 and a molecular weight of 500 to 600. Moreover, the dynamic viscosity of the liquid polyalphaolefin at 40 ° C is preferably 20 to 40 mm in terms of imparting a moderate viscosity to the binder. 2 /s. In addition, the value of the "dynamic viscosity" in the present embodiment means a value measured based on JIS K2283:2000 "Crude oil and petroleum products - dynamic viscosity test method and viscosity index calculation method". (D1x) Other components The above-mentioned corrosion-resistant adhesive may contain the liquid polyisoprene, the liquid polybutadiene, and the liquid poly-α-olefin as a binder. Examples of other binders which may be contained in the above-mentioned anticorrosive adhesive include various paraffinic oils or various naphthenic oils. Further, the above-mentioned corrosion-resistant adhesive may contain various oil components such as wax. In the case where the other adhesive or the oily component is contained, it is preferable that the total content is 10% by mass or less of the total amount of the above-mentioned corrosion-resistant adhesive, and more preferably 5% by mass or less. The above-mentioned anti-corrosion adhesive may further contain an additive such as an adhesion-imparting agent, a rust preventive agent, an anti-fungal agent, an antibacterial agent, an antioxidant, a light stabilizer, an ultraviolet absorber, a gloss agent, a pigment, or the like as a binder. Wherein, in the case where the above-mentioned anti-corrosion adhesive contains liquid polyisoprene or liquid polybutadiene containing a large amount of double bonds, it preferably contains an antioxidant, a light stabilizer, an ultraviolet absorber, etc. It is preferable to contain a hindered phenol-based antioxidant as the antioxidant in a ratio of 0.5 part by mass or more to 2 parts by mass or less based on 100 parts by mass of the total of the liquid polyisoprene and the liquid polybutadiene. Further, the above-mentioned anticorrosive adhesive preferably contains 0.05 to 1.00% by mass of a hindered phenol-based antioxidant. (D2) Inorganic Filler (D2a) Organic Bentonite Powder The organic bentonite powder is preferably contained in the above-mentioned organic bentonite powder for capturing a binder such as liquid polyisoprene or liquid polybutadiene and gelling the binder. In the anti-corrosion adhesive. In addition, when the content of the entire binder is 100 parts by mass, the organic bentonite powder is preferably contained in the above-mentioned anticorrosive adhesive in an amount of 10 parts by mass or more and 35 parts by mass or less, more preferably 15 parts by mass. The above-mentioned anti-corrosion adhesive is contained in a mass part or more and 25 parts by mass or less. Furthermore, it is preferable to contain an organic bentonite powder so that the ratio of the inorganic filler may be 2% by mass or more and 10% by mass or less. When the above-mentioned anti-corrosion adhesive contains liquid polyisoprene and liquid polybutadiene, when the total content of the liquid polyisoprene and the liquid polybutadiene is 100 parts by mass The organic bentonite powder is usually contained in the above-mentioned anti-corrosion adhesive in an amount of 10 parts by mass or more and 50 parts by mass or less, more preferably 20 parts by mass or more and 30 parts by mass or less or less. In the adhesive. Further, the above-mentioned anti-corrosion adhesive preferably contains 1 to 15% by mass of an organic bentonite powder. Further, regarding the organic bentonite powder, various kinds of cations such as bis(hydrogenated tallow) dimethylammonium chloride or cetyl cetyltrimethylammonium chloride are ion-exchanged with cations existing between the crystal layers. As a result, the above-mentioned anti-corrosion adhesive can utilize such a commercial product. If the organic bentonite powder is used in an excessively large particle size, even if it is the same blending amount, compared with the case where the particle size is finer, there are the following defects: an organic compound containing active hydrogen is easily caused (liquid polymerization) The trapping ability of isoprene, liquid polybutadiene, etc. is insufficient, and it is necessary to mix a large amount of the above-mentioned anti-corrosion adhesive in order to suppress component separation (oil separation) of the above-mentioned anti-corrosion adhesive. In addition, it is not limited to the organic bentonite powder, and when the particle size is too large in the following aluminum hydroxide powder or calcium carbonate powder, it is compared with the case where the particle size is finer than the case where the particle size is fine. There are also the following problems: it is easy to make the above-mentioned anti-corrosive adhesive sticky, and the workability in the putty and the like is lowered. In this case, the organic bentonite powder is preferably one of 95% by mass or more passing through a sieve (the remaining portion of the screen is 5% by mass or less) when it is sieved by a 450 mesh (32 μm sieve) in a dry state. (D2b) The aluminum hydroxide powder preferably contains the hydrogen in order to impart shape retention to the above-mentioned corrosion-resistant adhesive, for example, to suppress natural flow even at a high temperature of 50 ° C, and to impart flame retardancy to the above-mentioned corrosion-resistant adhesive. Alumina powder. In the case of the above-mentioned shape retention property or the above-mentioned flame retardancy, when the content of the entire binder is 100 parts by mass, the aluminum hydroxide powder is preferably contained in an amount of 150 parts by mass or more and 300 parts by mass or less. In the above-mentioned anti-corrosion adhesive, it is more preferably contained in the above-mentioned anti-corrosion adhesive in an amount of 180 parts by mass or more and 250 parts by mass or less. In addition, the aluminum hydroxide powder is preferably contained in such a ratio that the ratio of the inorganic filler is 40% by mass or more and 60% by mass or less. The aluminum hydroxide is decomposed and dehydrated at a temperature of from 200 ° C to 350 ° C. Since the dehydration reaction is an endothermic reaction, it exhibits an effect of rapidly cooling the above-mentioned anti-corrosion adhesive to start combustion. In order to make the above-mentioned anti-corrosive adhesive exert such a flame retarding effect, the aluminum hydroxide powder is preferably one having a fine particle diameter. On the other hand, if the aluminum hydroxide powder having an excessively small particle diameter is used, there is a case where the above-mentioned corrosion-resistant adhesive is in a state of being firmly tightened, resulting in impaired deformability or ductility of the above-mentioned corrosion-resistant adhesive. This results in a decrease in workability when forming an anti-corrosion structure. Therefore, the above-mentioned corrosion-resistant adhesive can be excellent in workability and excellent in flame retardancy, and the median diameter is 1 μm or more and 50 μm or less by a laser diffraction type particle size distribution measuring apparatus. (preferably 10 μm or more and 40 μm or less) and 99% by mass or more of the sieve passing through the 75 μm sieve (the residual portion of the sieve is 1% by mass or less) is suitable as the aluminum hydroxide in the present embodiment. powder. (D2c) The calcium carbonate powder preferably contains the calcium carbonate powder in order to impart shape retaining property to the above-mentioned anticorrosive adhesive in the same manner as the aluminum hydroxide powder. In view of the above-mentioned conformality, when the content of the entire binder is 100 parts by mass, the calcium carbonate powder is preferably contained in the above-mentioned anticorrosive adhesive in an amount of 100 parts by mass or more and 200 parts by mass or less. In the above, the above-mentioned anti-corrosion adhesive is more preferably contained in an amount of 130 parts by mass or more and 170 parts by mass or less. In addition, the calcium carbonate powder is preferably contained in an amount of 30% by mass or more and 50% by mass or less based on the ratio of the inorganic filler. In addition, in the case where the above-mentioned corrosion-resistant adhesive can be made excellent in workability, the median diameter is 1 μm or more and 50 μm or less, and 99% by mass or more is sieved by a 75 μm sieve (screen) The residual portion is 1% by mass or less, and is suitable as the calcium carbonate powder in the present embodiment. (D2x) The above-mentioned anti-corrosion adhesive may contain an inorganic filler other than the above-described organic bentonite, aluminum hydroxide powder, and calcium carbonate powder. Examples of the other inorganic filler which may be contained in the above-mentioned anti-corrosion adhesive include talc powder, clay powder, alumina powder and the like. In the case where the inorganic filler is contained, the total content is preferably 10% by mass or less based on the total amount of the inorganic filler, and more preferably 5% by mass or less. The anti-corrosion adhesive preferably has the following constitution from the viewpoints of the workability in the winter, the workability in the summer, and the use of the putty such as the piping in which the surface temperature becomes a high temperature (for example, 80 ° C). That is, in the anti-corrosion adhesive, it is preferred that the inorganic filler contains the organically treated organic bentonite powder, the aluminum hydroxide powder, and the calcium carbonate powder. Further, the anti-corrosion adhesive contains the above-mentioned organic bentonite powder in an amount of preferably 10 parts by mass or more, more preferably 15 to 25 parts by mass, still more preferably 20 to 25 parts by mass, per 100 parts by mass of the oil component. Further, in the anti-corrosion adhesive, the mass of the aluminum hydroxide powder relative to the calcium carbonate powder is preferably from 1.00 to 1.50, more preferably from 1.08 to 1.40, still more preferably from 1.20 to 1.33. When the content of the entire binder is 100 parts by mass, the inorganic filler is preferably contained in the above-mentioned anti-corrosion adhesive in an amount of 200 parts by mass or more and 500 parts by mass or less, more preferably 300 parts by mass. The above and 400 parts by mass or less are contained in the above-mentioned anti-corrosion adhesive. When the content of the entire binder is 100 parts by mass, the inorganic filler is contained in the above-mentioned corrosion-resistant adhesive so as to be 200 parts by mass or more, whereby the corrosion-resistant adhesive has an advantage of being excellent in flame retardancy. In addition, when the content of the entire binder is 100 parts by mass, the inorganic filler is contained in the above-mentioned anticorrosive adhesive so as to be 500 parts by mass or less, whereby the anticorrosive adhesive is hard to be hardened and formed. The advantage of easy operation when resisting the adhesive layer. The oil absorption amount of the above inorganic filler is preferably 5 mL/100 g to 50 mL/100 g, more preferably 10 mL/100 g to 40 mL/100 g, and even more preferably 20 mL/100 g to 30 mL/ 100 g. In addition, in the present specification, the "oil absorption amount" means a value measured based on JIS K5101-13-1:2004 "Pigment Test Method - Part 13: Oil absorption amount - Section 1: Refined linseed oil method". . The oil absorption amount of the inorganic filler can be adjusted by the amount of the various materials in the material constituting the inorganic filler or the inorganic filler. The consistency of the above-mentioned corrosion-resistant adhesive at 0 ° C is preferably 30 or more, more preferably 40 or more and 100 or less, and still more preferably 50 or more and 90 or less from the viewpoint of the workability in winter. Moreover, the thickness of the above-mentioned corrosion-resistant adhesive at 40 ° C is preferably 150 or less, more preferably 50 or more and 130 or less, and still more preferably 60 or more and 100 or less, in consideration of use in summer or the like. Furthermore, the above-mentioned corrosion-resistant adhesive can be used at a normal temperature in terms of excellent followability of the shape of the metal member which is excellent in ductility and corresponding to the protection, and the surface can be easily smoothed by using a fingertip or a doctor blade or the like. For example, the consistency at 20 ° C) is preferably 50 or more and 100 or less, more preferably 70 or more and 90 or less. Further, the above-mentioned corrosion-resistant adhesive preferably has a consistency of 200 or less, more preferably 150 or less, at a high temperature (for example, 50 ° C) assumed under normal use conditions. In the present specification, the "consistency" means a value measured based on JIS K2235-1991 "Petroleum Wax 5.10 Consistency Test Method". In the present embodiment, the aluminum oxide powder or the calcium carbonate powder is contained in terms of imparting shape retention or flame retardancy to the anti-corrosion adhesive and easily adjusting the consistency of the anti-corrosion adhesive. As the inorganic filler, the anti-corrosion adhesive of the present embodiment may contain only organic bentonite as an inorganic filler. In other words, if the inorganic filler is only organic bentonite, the properties such as the consistency of the produced anti-corrosion adhesive may vary greatly depending on the mixing conditions of the liquid polyisoprene or the liquid polybutadiene. Further, in the present embodiment, the aluminum hydroxide powder or the calcium carbonate powder is contained in the above ratio, but most of the effect of suppressing the separation of the oil from the anti-corrosion adhesive is brought about by the organic bentonite. . Further, in the present embodiment, the liquid polyalphaolefin may be exemplified by liquid polyisoprene having a hydroxyl group at the molecular terminal or liquid polybutadiene in terms of imparting an appropriate viscosity to the oil component. In the case of use, the anti-corrosion adhesive of the present embodiment may contain only liquid polyisoprene or liquid polybutadiene as the oil component. That is, the anti-corrosion adhesive can inhibit the separation of the oil from the anti-corrosion adhesive as long as it contains substantially the organic bentonite powder and the liquid polyisoprene or the liquid polybutadiene having a hydroxyl group at the molecular end. All the ingredients exemplified above. (Corrosion Sheet Layer A) The etching resist sheet forming the above-described etching resist layer A is formed into a strip-shaped corrosion-resistant belt 12. The anti-corrosion structure of the present embodiment has the above-described anti-corrosion sheet layer A, whereby the anti-corrosion structure is peeled off by the contact of an object or the like, and as a result, corrosion of the metal member can be suppressed. The above-mentioned anti-corrosion sheet layer A is formed by winding a strip-shaped anti-corrosion sheet (anti-corrosion tape) on the undercoat layer C and the anti-corrosion adhesive layer D, and is formed by half-wraping the anti-corrosion tape. Therefore, as shown in FIG. 2, the corrosion-resistant structure 1 of the present embodiment includes the first layer A1 which is in contact with the corrosion-resistant adhesive layer D from the outside and the second layer A2 which is in contact with the first layer A1 from the outside. The corrosion-resistant sheet layer A of the layer structure. On the other hand, the etching resist layer A in the present embodiment is provided on the corrosion-resistant structural body 1 to exhibit corrosion resistance to the metal member, and to protect the primer material and the corrosion-resistant adhesive. The anti-corrosion sheet has a substrate and an anti-corrosion composite (third anti-corrosion composite) impregnated into the substrate. This base material becomes a porous sheet-like base material sheet. In other words, the corrosion-resistant tape 12 is formed by impregnating the third corrosion-resistant composite 12b and carrying it on the belt-shaped base material sheet 12a. The material of the base material sheet is not particularly limited as long as it can impart a moderate strength to the corrosion-resistant belt 12, and for example, a woven fabric such as polyester fiber, polypropylene fiber, polyamide fiber or the like, a nonwoven fabric or the like can be used. Further, the thickness of the base material sheet is not particularly limited, and it is usually 0.1 to 15 mm thick, preferably 0.2 to 12 mm thick, and more preferably 0.3 to 10 mm thick. The third anti-corrosion composite contains an oil-containing binder (A1) and an inorganic filler (A2). Further, it is preferable that the third corrosion-resistant composite contains an unsaturated oil as an oil. Further, the iodine value of the third anti-corrosion composite is preferably 10 or more, more preferably 20 to 50. Further, the value of the iodine value can be determined by performing measurement based on JIS K5421: 2000 "Boiling oil and boiled linseed oil". Further, the third anticorrosive composite preferably contains an oil and a functional additive as the binder, and an inorganic filler, and contains a surface oil as the boiling oil of the oil and a surface treatment material as the functional additive. The third anti-corrosion composite contains a boiling oil, an inorganic filler, and a surface treatment material, whereby the inorganic filler is easily affinity with the oil, and as a result, the surface of the anticorrosive sheet layer A can be made smooth. Further, the third anticorrosive composite is preferably contained in an amount of 150 to 300 parts by mass based on 100 parts by mass of the binder, and more preferably 200 to 250 parts by mass. Further, the third anticorrosive composite is preferably contained in an amount of 2 to 20 parts by mass based on 100 parts by mass of the oil, and more preferably 5 to 15 parts by mass. As the rust preventive or inorganic filler constituting the third anticorrosive composite, the same as the first anticorrosive composite used as the undercoat material can be used. Hereinafter, each component will be described in more detail. (Adhesive A1 of Anti-etching Sheet) The above-mentioned adhesive A1 contains oil (A1a) and a functional additive (A1b). (Anti-corrosion sheet oil A1a) The boiling oil contained in the above-mentioned oil is preferably one having an iodine value of 130 or more obtained by heat-treating the oil as described above in the presence of a desiccant. The boiling oil is preferably measured by a Gardner-type bubble viscometer method according to JIS K5600-2-2:1999 "General Test Method for Coatings - Part 2: Properties of Coatings - Stability - Section 2: Viscosity" The viscosity (23 ° C) is between "A1" and "C". Further, in the present embodiment, the boiling oil contained in the third anticorrosive composite preferably has an iodine value of 130 to 210 and an iodine value of preferably 150 to 190. Further, in the present embodiment, the boiling oil contained in the third anticorrosive composite is preferably JIS K5601-2-1:1999 "Test Method for Coating Composition - Part 2: Component Analysis in Solvent Soluble - The acid value obtained by the method specified in Section 1: Acid value (titration method) is 2 or less. In the third anticorrosive composite of the present embodiment, the oil is preferably contained in an amount of 10 to 30% by mass, and the ratio of the boiling oil to the oil component is preferably 30% by mass or more. The ratio of the boiling oil to the above oil is more preferably 40% by mass or more, and particularly preferably 50% by mass or more. That is, the base oil of the third anti-corrosion composite of the present embodiment is preferably a boiling oil. The base oil of the third anti-corrosion composite of the present embodiment is a dry oil, and after the anti-corrosion sheet layer A is formed by using the anti-corrosion tape 12, the anti-corrosion sheet layer A can be firmly tightened. Further, the third anticorrosive composite of the present embodiment is a boiling oil, whereby the anticorrosive tape 12 can be used to form the anticorrosive sheet layer A, and the drying is moderate. The anti-corrosion sheet layer A is appropriately dried, thereby preventing cracking caused by rapid drying or forming a surface coating film which is largely different from the internal properties, thereby suppressing generation of a bubble film due to premature formation of the coating film. Foaming. The above oil preferably contains rapeseed oil. When the oil contains rapeseed oil, the drying of the etching resist layer A can be suppressed, and as a result, the flexibility of the etching resist layer A can be easily maintained. The ratio of the above rapeseed oil to the above oil is preferably from 25 to 60% by mass, more preferably from 35 to 50% by mass. Examples of the oil constituting the third anticorrosive composite include a paraffinic oil, a naphthenic oil, an aromatic oil, and various waxes in addition to the boiling oil and the rapeseed oil. Among them, it is preferred that the oil contains a dry oil. As the drying oil contained in the third anticorrosive composite, for example, oil such as linseed oil, poppy seed oil, tung oil, perilla oil, walnut oil, eucalyptus oil, safflower oil, or sunflower oil can be used. A part or all of the dry oil contained in the third anti-corrosion compound may be referred to as "semi-dry oil" such as corn oil, cottonseed oil, sesame oil or soybean oil, and the iodine value is 100 or more and less than 130. Oil. In addition, in order to adjust the drying property of the anti-corrosion sheet layer A, the third anti-corrosion compound may contain a non-drying oil having an iodine value of less than 100, such as camellia oil, olive oil, castor oil, or coconut oil. (Functional Additive (A1b) of the Anticorrosive Sheet Layer A) The functional additive preferably contains a surface treatment material. The surface treatment material preferably contains at least any coupling agent of a decane coupling agent, a titanium coupling agent, and an aluminate coupling agent. Moreover, it is more preferable that the surface treatment material contains a coupling agent represented by the following formula (1). The third anti-corrosion composite contains an inorganic filler and a boiling oil, and further contains a surface-treating material, whereby the inorganic filler is easily affinity with the boiling oil, and as a result, the surface of the anti-corrosion sheet layer A can be made smooth. In addition, since the inorganic filler is easily compatible with the oil, the inorganic filler contains at least one of magnesium hydroxide and aluminum hydroxide, and the total content of magnesium hydroxide and aluminum hydroxide in the third anticorrosive composite. When the content is 50% by mass or more, the surface of the etching resist layer A may be smooth. [Chemical 1] (here, X is Si or Ti, R 1 Is a substituted or unsubstituted hydrocarbon group having 6 or more carbon atoms, R 2 Is methyl or ethyl, R 3 Is methyl or ethyl, R 4 The surface treatment material is preferably 1 to 10 parts by mass, more preferably 2 to 6 parts by mass, per 100 parts by mass of the inorganic filler. Further, the third anticorrosive composite preferably contains a rust inhibitor as the functional additive. The ratio of the rust preventive agent, the inorganic filler, the surface treatment material, and the oil contained in the third anticorrosive composite may be appropriately determined, and it is preferably 1 to 10 parts by mass per 100 parts by mass of the oil. The rust agent is particularly preferably contained in an amount of from 3 to 8 parts by mass. Further, the third anti-corrosion composite preferably contains a terpene resin as the functional additive. By making the functional additive contain a terpene resin, the viscosity of the etching resist layer A can be improved. The ratio of the terpene resin to the third anti-corrosion composite is preferably from 3 to 30% by mass, more preferably from 5 to 20% by mass. The inorganic filler constituting the third anticorrosive composite is preferably a part or all of the aluminum hydroxide particles, and preferably 50% by mass or more of the aluminum hydroxide particles. The functional additive may further contain a viscosity modifier or various additives in the same manner as the primer. (Inorganic Filler A2 of Anti-corrosion Sheet Layer A) The inorganic filler constituting the third anti-corrosion compound may further contain magnesium hydroxide particles. When the inorganic filler contains aluminum hydroxide particles and magnesium hydroxide particles, the total amount thereof is preferably 100 to 250 parts by mass, more preferably 150 to 200 parts by mass based on 100 parts by mass of the oil component. Share. In addition, it is preferable that the aluminum hydroxide particles (ATH) and the magnesium hydroxide particles (MDH) are contained so that the ratio (mass ratio) in the third anticorrosive composite is 1:1 to 2:1 (ATH: MDH). In the third anti-corrosion compound. Further, in the present embodiment, in order to adjust the drying property of the etching resist layer A, the third anti-corrosion composite may further contain a desiccant such as cobalt naphthenate or calcium naphthenate. (Protective layer B (top coat B)) The protective layer B is provided on the outermost surface side of the anti-corrosion structure 1 so as to be formed of the anti-corrosion sheet layer A formed by the third anti-corrosion composite supported on the base sheet. Surface protection. The protective layer B is formed by applying a top coat material to the surface of the anti-corrosion sheet layer A and drying it. The UV transmittance of the protective layer B is preferably 1% or less, more preferably 0.5% or less. In the corrosion-resistant structure 1 of the present embodiment, the UV transmittance of the protective layer B is 1% or less, and the polymerization reaction of the unsaturated oil in the etching resist layer A can be suppressed from proceeding excessively. As a result, the corrosion-resistant sheet layer A can be maintained at an appropriate hardness, and cracking of the corrosion-resistant sheet layer A can be suppressed. Further, corrosion of the metal member can be further suppressed. Further, UV (ultraviolet light) in the above UV transmittance means a wavelength of 300 nm. The top coat material preferably contains a binder (B1) and an inorganic filler (B2), and the inorganic filler contains plate-like particles. Thereby, when the protective layer B is formed, the plate-like particles can be aligned in the direction of the planar direction of the protective layer. As a result, the barrier function of the protective layer B can be exhibited by the plate-like particles. It is preferable that the inorganic filler contains hollow particles in addition to the plate-like particles (solid plate-like particles). Thereby, the hollow particles can be densely packed on the surface of the protective layer B when the protective layer is formed. As a result, the strength of the protective layer B can be made excellent by the hollow particles. Hereinafter, each component will be described in more detail. (Binder B1 of Protective Layer B) The above-mentioned binder contained in the top coat material is liquid at normal temperature before being formed on the film, and is applied to the surface of the above-mentioned corrosion-resistant sheet layer A, and then dried and solidified. The main body of the membrane. In other words, the film constituting the protective layer B of the present embodiment is a structure in which an inorganic filler is dispersed in a matrix formed by a cured product of the above-mentioned binder. The binder of the present embodiment can be obtained by dissolving a polymer component such as a polymerizable monomer, a polymerizable oligomer, and a polymer in an organic solvent or dispersing the polymer component in an aqueous solvent. Into the latex and so on. Further, in view of the fact that the above-mentioned anti-corrosion sheet layer A is dissolved or swollen due to the kind of the organic solvent, the above-mentioned binder is preferably an aqueous emulsion. When the above-mentioned binder is used as the aqueous emulsion, it is easy to make the matrix 13a of the film to have excellent strength. The binder is preferably an acrylic polymer or an acrylic resin by polymerization. An aqueous acrylic emulsion obtained by dispersing an acrylic monomer or an acrylic oligomer of a polymer in an aqueous solvent. Examples of the acrylic monomer include acrylates or methacrylates which are generally structural units of an acrylic resin. Further, examples of the acrylic oligomer include those obtained by polymerizing the above acrylic monomer. When the above-mentioned binder is used as the aqueous acrylic emulsion, it is preferred that the binder further contains a polymethacrylic polymer interface surfactant. When the above-mentioned binder is used as the aqueous acrylic emulsion, it is preferred to contain a film forming aid. Examples of the above-mentioned film-forming auxiliary agent contained in the top coat material include ethyl carbitol, butyl carbitol, butyl carbitol acetate, ethyl cellosolve, butyl cellosolve, and butyl cellosolve. Alcohol acetate, benzyl acetate, 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, ethylene glycol, diethylene glycol propylene glycol, hexanediol and other alcohols; propylene glycol Methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate, propylene glycol n-propyl ether, dipropylene glycol n-propyl ether, tripropylene glycol n-propyl ether, propylene glycol n-butyl ether, Ethers such as dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, dipropylene glycol dimethyl ether, dipropylene glycol methyl ether and propylene glycol phenyl ether, tetrapropyl propylene glycol methyl ether and higher alkyl ether; benzyl alcohol Wait. (Inorganic Filler B2 of Protective Layer B) The protective layer B contains hollow particles as the first inorganic particles and contains plate-like particles as the second inorganic particles, so that it does not have a clear interface like the above-described etching resist layer A. However, when the above film is formed, a laminated structure as shown in Fig. 2 can be formed. Further, the top coat material of the present embodiment can be simply formed into a film having a three-layer laminated structure as shown in Fig. 2 by a simple process of applying and drying the surface of the etching resist layer A. In this regard, when the surface coating material 13x is applied to the surface of the corrosion-resistant tape 12 on which the etching resist layer A is formed by the squeegee SC or the like, the surface coating material 13x is scraped. The shearing force generated by the plate SC is aligned with the plate-like particles 13b in the shearing direction of the top coating material 13x (the direction parallel to the surface of the etching resist layer A). In other words, in the wet coating film formed by the top coating material 13x, the plate-like particles 13b are likely to be disposed opposite to the surface of the etching resist layer A. When the top coat material is applied to the surface of the etching resist layer A, the cohesive force of the adhesive acts on the repulsive force of the hollow particles 13c, and the hollow particles 13c are extruded to the surface layer portion of the wet coating film. Further, when the apparent density of the hollow particles including the voids of the inner package is lower than the density of the binder, the hollow particles are easily moved to the surface of the coating film by the action of buoyancy. Further, as the hollow particles move toward the surface of the coating film, the plate-like particles settle toward the surface of the etching resist layer A. Here, a large surface area is formed on the surface of the wet coating film by the irregularities formed by the hollow particles. Therefore, in the present embodiment, the speed at which the wet coating film forms a film in a dry state is improved by the unevenness. In the present embodiment, a three-layer laminated structure as shown in Fig. 2 can be formed into the above-mentioned film by such a simple method. According to the above description, in the first layer B1 of the three-layer structure of the film which is in contact with the surface of the etching resist layer A, the concentration (% by mass) of the plate-like particles 13b is relatively higher than that of the other two layers, and becomes the surface layer of the film. In the third layer B3 of the portion, the concentration (% by mass) of the hollow particles 13c is relatively higher than that of the other two layers. Therefore, in the second layer B2 constituting the central portion in the thickness direction of the three-layer structure of the film, the concentration (% by mass) of the matrix 13a is relatively higher than that of the other two layers. As described above, the anti-corrosion structure 1 of the present embodiment has the third layer B3 on the outermost surface and the hollow inorganic particles are densely attached to the surface, so that the surface lubricity and the surface strength are excellent. Further, the anti-corrosion structure 1 of the present embodiment is excellent in heat insulating properties because the hollow inorganic particles are densely packed on the outermost surface. The hollow particles 13c are preferably spherical particles, and preferably glass microspheres, in order to impart such excellent surface hardness to the corrosion-resistant structure 1. The glass microspheres are preferably obtained by using a spherical material such as soda glass, ceria, aluminosilicate (white sand, fly ash) or the like as a raw material by a laser diffraction type particle size distribution measuring device. When the median diameter (D50) is 5 to 500 μm, it is preferable that the residual portion of the sieve having a sieve of 250 μm is 5% by mass or less. The plate-like particle 13b in which the corrosion-resistant structure 1 of the present embodiment is aligned along the surface of the etching resist layer A is densely colored in the vicinity of the etching resist layer A. The plate-like particles 13b effectively function as light blocking properties, gas barrier properties, and the like. In other words, in the corrosion-resistant structure 1 of the present embodiment, the components of the third anti-corrosion composite constituting the anti-corrosion sheet layer A can be prevented from oozing out to the outer surface of the anti-corrosion structure 1 through the protective layer B by the plate-like particles 13b. It is preferable that the above-mentioned dry oil contained in the etching resist layer A contains a large amount of unsaturated bonds, and has a property of being dried in a state in which the polymerization reaction is cut by the unsaturated bond. Therefore, even when the anti-corrosion sheet layer A is formed by the third anti-corrosion composite as described above, the anti-corrosion structure 1 of the present embodiment has a film in which the plate-like particles 13b are densely mixed with the first layer B1. It is possible to suppress the light energy from the outside such as sunlight from reaching the above-mentioned etching resist layer A. That is, the corrosion-resistant sheet layer A of the corrosion-resistant structure 1 of the present embodiment is hardened by light energy to a lower level than necessary. As described above, the anti-corrosion structure 1 of the present embodiment has a low temperature sensitivity of the undercoat layer C even when it is installed in a place where the ambient temperature changes greatly and is exposed to sunlight. Further, since the top coat B also exhibits a light-shielding property, it is prevented from falling off from the metal member 20. Further, in order to exert such an effect, the plate-like particles are preferably metal particles or metal oxide particles, and preferably iron oxide particles. Also, the average length of the plate-like particles 13b (L Ave ) preferably 10 to 200 μm, average length (L) Ave Relative to the average thickness (t Ave Ratio of (L Ave /t Ave It is preferably 5 times or more and 30 times or less. Average length of the plate-like particles 13b (L Ave ) or the above ratio (L Ave /t Ave For example, it can be obtained by observation by a scanning electron microscope (SEM) or the like. More specifically, the plate-like particles 13b can be observed by SEM at a magnification of about 5,000 times, and particles having an orientation in which the plane direction and the observation direction are substantially parallel (upright state) can be found, and the contour shape of the particles in the SEM observation direction can be obtained. And determine the longest dimension of the contour shape as the length (L) of the particle. Further, the thickness (t) of the particles can be obtained by dividing the area of the outline shape by the length (L). Next, the length (L) and the thickness (t) are obtained for 10 or more randomly selected particles, and arithmetic average is performed to obtain the average length of the plate-like particles 13b (L). Ave ) with average thickness (t Ave ). In addition, it is preferable that the top surface coating material 13b or the hollow particle 13c is contained in the film 13 in a mass ratio of 10 to 30% by mass. In the top coat material of the present embodiment, in addition to the plate-like particles 13b or the hollow particles 13c, third inorganic particles (third inorganic particles) may be contained. Examples of the third inorganic particles include solid spherical particles such as smoked cerium oxide. The smoked cerium oxide exerts an effect of suppressing the adhesion of the binder and suppressing the occurrence of dripping during the period before the coating material applied to the surface of the etching resist layer A is hardened to form a film. In terms of exhibiting this effect more significantly, the smoked cerium oxide is preferably a specific surface area of 90 to 300 m by the BET (Brunauer-Emmett-Teller) method. 2 /g. Further, the specific surface area obtained by the BET method means a value measured in accordance with JIS Z8830:2013 (method for measuring BET specific surface area based on gas adsorbed powder (solid)). The surface coating material preferably has a solid content concentration of 50% by mass or more and 70% by mass or less, more preferably 60% by mass or more and 65% by mass or less, in terms of exhibiting good ductility on the corrosion-resistant belt. Ingredient concentration. In order to prevent dripping during coating, the top coat material preferably contains smoked cerium oxide, preferably containing cerium oxide in a ratio of 1 to 5% by mass, preferably smoked cerium oxide. The ratio of the inorganic particles is 2 to 4% by mass. From the viewpoint of being difficult to separate, difficult to drip, and less likely to cause cracks, it is preferable to have the following constitution. That is, the top coat material preferably has plate-like particles and smoked cerium oxide. Further, in the plate-like particles of the top coat material, the ratio of the average length to the average thickness is preferably from 7 to 15. Further, in the smoked cerium oxide of the top coating material, the BET specific surface area is preferably from 100 to 400 m. 2 /g, more preferably 150 to 300 m 2 /g. In the top coat material, the ratio of the inorganic particles in the dry film, that is, the ratio of the inorganic solid component in the top coat material to the total of the organic solid component and the inorganic solid component is higher, and the strength is excellent. The protective layer B is more advantageous, but on the other hand, it is easier to cause cracks or the like in the protective layer B. Therefore, the ratio of the inorganic solid content component in the total amount of the organic solid component and the inorganic solid component in the top coat material is preferably 50% by mass or more and 70% by mass or less. In addition, when the total amount of the inorganic solid content is 100% by mass, the plate-like particles 13b or the hollow particles 13c are preferably contained in a total amount of 70% by mass or more and 90% by mass or less. In the coating material. The top coat material of the present embodiment contains the hollow particles 13c, and when applied to the corrosion-resistant tape, fine irregularities are formed on the surface, and the volatility of the solvent on the surface is excellent, and by containing the above-mentioned film-forming auxiliary agent, The film can be formed quickly on the surface. In other words, the top coat material of the present embodiment is excellent in surface dryness by containing the above-mentioned film forming aid. The film-forming aid is also effective for preventing cracking of the top coat B, and the ratio of the film-forming material is preferably 5% by mass or more. Furthermore, it is not particularly preferable to excessively contain the above-mentioned film-forming auxiliary. Therefore, the ratio of the above-mentioned film-forming auxiliary agent to the top coat material is preferably 10% by mass or less. Since the top coat material of the present embodiment constitutes the outermost surface of the anti-corrosion structure 1, it is preferable to contain an ultraviolet absorber or an antioxidant in addition to the above. Further, the third coating material or the primer material may be the same as the above-mentioned third etching resist or primer. Since the anti-corrosion structure system of this embodiment is configured as described above, it has the following advantages. The anti-corrosion structure system of the present embodiment includes an anti-corrosion sheet layer A covering a metal member and an anti-corrosion structure body covering the protective layer B of the anti-corrosion sheet layer A. The above-mentioned anti-corrosion sheet layer A is formed of an anti-corrosion sheet. The anti-corrosion sheet has a substrate and an anti-corrosion composite impregnated into the substrate. The above-mentioned anti-corrosion sheet contains an unsaturated oil as the above-mentioned anti-corrosion compound. The protective layer B is formed by a top coat material. The protective layer B has a UV transmittance of 1% or less. The corrosion-resistant structure contains an unsaturated oil by the above-mentioned corrosion-resistant sheet layer A, and the unsaturated oil is polymerized to be hardened. As a result, it is difficult to generate a dropping liquid, and the component is prevented from being separated from the etching resist layer A. Further, in the anti-corrosion structure, the UV transmittance of the protective layer B is 1% or less, and the polymerization reaction of the unsaturated oil can be suppressed from proceeding excessively. As a result, the corrosion-resistant sheet layer A can be maintained at an appropriate hardness, and cracking of the corrosion-resistant sheet layer A can be suppressed. Therefore, the anti-corrosion structure can suppress separation of components from the anti-etching sheet layer and can suppress cracking of the anti-corrosion sheet layer. According to the present embodiment, it is possible to suppress separation of components from the etching resist and to suppress cracking of the etching resist. Furthermore, the corrosion-resistant structure of the present invention is not limited to the above embodiment. Further, the corrosion-resistant structure of the present invention is not limited to the above-described effects. The anti-corrosion structure of the present invention can be variously modified without departing from the gist of the present invention. [Examples] Hereinafter, the present invention will be described in detail with reference to test examples, but the present invention is not limited thereto. <Test Example 1> (Formation of Anti-corrosion Structure) First, an anti-corrosion structure to be compared (hereinafter referred to as "anti-corrosion structure A") is formed. A 100A steel pipe is used for the metal member protected by the corrosion-resistant structure A. The undercoat layer of the anti-corrosion structure A is formed by slurrying paraffin wax, oxidized paraffin, vaseline, and mineral oil in substantially equal amounts. The slurry was made to be 300 g/m 2 The coating amount is applied to the surface of the steel pipe to form an undercoat layer. When the anti-corrosion structure A is formed, the anti-corrosion tape is formed by winding a semi-wound on the undercoat layer to form an intermediate layer. Further, when the corrosion-resistant structure A is formed, a surface coating is formed by using a belt member (hereinafter referred to as "milk tape") obtained by impregnating a liquid containing an acrylic latex and a film-forming auxiliary agent into a polyester nonwoven fabric substrate. . Next, when the anti-corrosion structure A is formed, a polypropylene resin tape having a thickness of 17 μm is wound around the outer periphery of the corrosion-resistant tape before the latex tape is wound, and the intermediate layer and the surface are formed by a polypropylene resin tape. A blocking layer that blocks between coatings. Then, another anti-corrosion structure (hereinafter referred to as "anti-corrosion structure B") separated from the anti-corrosion structure A is produced. This anti-corrosion structure B is the same as the anti-corrosion structure A in that the steel pipe of 100 A is used as a metal member. On the other hand, the undercoat layer of the anti-corrosion structure B contains a ratio of about 60% by mass of polybutene, about 10% by mass of the organic bentonite particles, and about 25% by mass of the talc particles, and the remainder contains rust prevention. Primer materials such as agents. Next, when the anti-corrosion structure B is formed, the anti-corrosion tape is half-circle around the undercoat layer (primer material: about 300 g/m) 2 The intermediate layer is formed thereon, and a barrier layer formed of a polypropylene resin tape is not provided to form a top coat layer. Further, when forming the top coat layer, the following top coat material is used, which comprises an aqueous acrylic emulsion, a film forming aid, and fly ash microspheres (hollow particles: an average particle diameter of about 150 μm, a maximum particle diameter of about 400 μm, Bulk density 0.7 g/cm 3 ), mica-like iron oxide (plate-like particles: average length of about 50 μm, average thickness of about 5 μm), and smoked cerium oxide, and the solid content concentration is higher than 60% by mass (organic solid component: inorganic solid component ≒4:6, mass ratio), main component of organic component, the acrylic resin contained in the above aqueous acrylic latex, and about 80% by mass of the inorganic solid component is either fly ash microsphere or mica iron oxide The mass ratio of fly ash microspheres to mica iron oxide is about 2:3. Further, the UV transmittance (wavelength of UV: 300 nm) of the top coat layer was 1% or less. (Workability) In order to exhibit good adhesion to the adherend even during construction in a cold area, the corrosion-resistant belt usually feels sticky at normal temperature. Therefore, when the anti-corrosion structure A is formed, the polypropylene resin tape is wound and the latex tape is wound. On the other hand, since the top coating material of the corrosion-resistant structure B is liquid, it is easy to apply directly to the corrosion-resistant belt to form a top coat. That is, the corrosion-resistant structure B is easier to manufacture than the corrosion-resistant structure A. (Evaluation of Exudation) Using a punch having a hole diameter (diameter) of 2 mm, a hole reaching the steel pipe was formed in both the corrosion-resistant structure A and the corrosion-resistant structure B to prepare a test body. The test piece was placed in a Jill aging incubator so that the longitudinal direction of the steel pipe was horizontal and the holes were directed downward, and heated at a temperature of 90 ° C for 3 months. As a result, the corrosion-resistant structure A was observed to seep out of the primer material shortly after the start of the test, and no seepage was observed in the corrosion-resistant structure B. (Thermal cycle test) The heat cycle test was carried out using the corrosion-resistant structure B (the hole was not opened by the puncher). In the test, a total of 8 hours of "40 ° C × 4 hours" and "110 ° C × 4 hours" was set as one cycle, and a thermal cycle of 50 cycles was applied to the corrosion-resistant structure B. As a result, no bleeding or other abnormalities in appearance were observed in the corrosion-resistant structure B at all. (Cryogenic Cracking Test) A metal member is changed to a steel pipe of 25 A, and an anti-corrosion structure (hereinafter referred to as "anti-corrosion structure a") having the same structure as the anti-corrosion structure A is produced, and has the same structure as the anti-corrosion structure B. An anti-corrosion structure (hereinafter referred to as "anti-corrosion structure b"). The anti-corrosion structure a and the anti-corrosion structure b are produced outdoors in the winter where snowfall occurs at a temperature of 2 °C. The anti-corrosion structure a and the anti-corrosion structure b were placed outdoors for one night, and the state of each was confirmed the next day. Furthermore, the temperature at night of the day of the day was -4 °C. As a result, a large number of cracks were observed on the surface of the corrosion-resistant structure a, and on the other hand, cracks were hardly observed in the corrosion-resistant structure b. (Study on the composition of the top coat material) Regarding the corrosion-resistant structure B, the case of changing the composition of the top coat material was examined. First, a top coat material (hereinafter referred to as "top coat material #1") is prepared, and the top coat material is used for forming an anti-corrosion except that about 10% of the water corresponding to the top coat material is added to increase the moisture content. The top coat material of the structure B (hereinafter referred to as "top coat material #0") is the same. The top coating material #1 has a solid content concentration of less than 60% by mass and is excellent in coating properties on the corrosion-resistant belt, but it is easy to cause dripping, and it is difficult to form a top coat having a uniform thickness. Further, when the topcoat material #1 was prepared, it was expected that the smoked cerium oxide was added at an early stage to exhibit thixotropy. However, in the evaluation of the topcoat material #1, the drip was produced as described above. Then, a topcoat material (hereinafter referred to as "top coat material #2") having a ratio of added water of about 0.8% (about 8 minutes) and not about 10% was produced. In the evaluation of the top coat material #2, although it was slightly lighter than the top coat material #1, a dripping liquid was also produced. Then, a top coat material having the same moisture content as the top coat material #0 but different types of fly ash microspheres used was produced. The fly ash microspheres used herein contain more coarse particles than the fly ash microspheres used in the topcoat material #0. The fly ash microspheres were sieved into a sieve residue (coarse grain) and a sieve passing portion (fine particle) using a 250 μm sieve. The following three kinds of top coat materials were prepared: a top coat material using a residual portion of the screen (hereinafter referred to as "top coat material #3"), and a surface coating material using a screen (hereinafter referred to as "top coat material"#4"), and a top coat material (hereinafter referred to as "top coat material #5") in which the fly ash microspheres were used without being sieved. When the top coat material #3 to top coat material #5 formed a top coat layer, it exhibited excellent coatability, and no dripping liquid was produced. However, the top coat formed by the top coat material #3 and the top coat material #5 was observed on the surface as the cause of the presence or absence of the unevenness of the coarse particles, compared with the top coat formed by the top coat material #4. The appearance is poor. A topcoat material (hereinafter referred to as "top coat material #6") in which the top coat material #4 is added with water for about 4 minutes, and a top coat material #4 is added with water of about 0.4% (about 4 minutes). A top coat material (hereinafter referred to as "top coat material #7") in which the film forming aid was added was carried out. Further, the solid content concentration of the top coating material #6 and the top coating material #7 is about 60% by mass, and the concentration of the film forming aid of the top coating material #6 is less than 5% by mass, whereas the top coating material The concentration of the film forming aid of #7 is higher than 5% by mass. Both the top coat material #6 and the top coat material #7 did not have a drip, and both exhibited excellent coatability when the top coat was formed. However, the top coat material #1 to the top coat material #7 were evaluated by holding the top coat layer in an environment of 5 ° C for 8 hours, and as a result, only the top coat layer formed by the top coat material #6 was used. The surface was found to be broken. According to the above description, it is confirmed that the solid content concentration is 60% by mass or more and the concentration of the film forming aid is 5% by mass or more, which is advantageous in that the wet coating film and the dried film are in a good state. (Evaluation of weather resistance) The above-described corrosion-resistant structure B was molded to form a test body for evaluating weather resistance by a carbon arc weather resistance tester "Sunshine weather meter" manufactured by Suga Test Instruments. Specifically, it is prepared as shown in FIG. Further, the left diagram of Fig. 4 is a plan view of the test body of the weather resistance test, and the right diagram is a cross-sectional view as seen along the line II of the left diagram. As shown in the figure, in the production of the test piece for the weather resistance test, a stainless steel plate BP (material: SUS304) having a thickness of 0.6 mm, a width of 70 mm, and a length of 150 mm was prepared, and a square steel plate SP was placed on the stainless steel plate BP. In the central portion, the undercoat layer C is formed in a range of 50 mm × 100 mm from the upper side of the steel sheet SP by the undercoat material. Two anticorrosive strips of the same area (50 mm × 100 mm) are laminated on the undercoat layer C to form an anticorrosive sheet layer A, and a top coat layer B is formed from the top surface by using a top coat material. Further, the anti-corrosion compound of the anti-corrosion tape is obtained by mixing a boiling oil, a rapeseed refined oil, and a hydrogenated terpene resin. The mass ratio of boiling oil, rapeseed refined oil and hydrogenated terpene resin was 1:1:2. Further, the UV transmittance (wavelength of UV: 300 nm) of the top coat layer was 1% or less. The test piece was attached to a sample holder of "Sunshine weather meter", and a weather resistance test was performed for 1,000 hours under the conditions of a black panel temperature of 63 ° C and a rainfall condition of 120 minutes for 120 minutes. After the test, the surface state or bleed of the top coat B was observed, and then the test body was disintegrated to confirm the generation of rust in the inner steel plate. As a result, regarding the top coat B, the deterioration due to the irradiation of the carbon arc was not particularly observed in appearance. Further, no exudation from the test body was found. Further, the steel sheet taken out from the test piece did not generate rust. In view of this, it was confirmed that the corrosion-resistant structure has excellent weather resistance, and it can exhibit excellent corrosion resistance for a long period of time in actual use. <Test Example 2> The undercoat materials shown in Table 1 below were produced using the following materials. Polybutene A: number average molecular weight 640 polybutene B: number average molecular weight 1500 bentonite A: organically treated bentonite B: untreated talc A: median diameter 250 μm talc B: median particle size 50 μm rust prevention Agent (Production of Anti-corrosion Structure) An anti-corrosion structure is formed. A 100A steel pipe is used for the metal member protected by the corrosion-resistant structure. When the undercoat layer of the anti-corrosion structure was formed, the undercoat material of Table 1 below was used. The primer material is made into 300 g/m 2 The coating amount is applied to the surface of the steel pipe to form an undercoat layer. Further, an intermediate layer is formed by winding a corrosion resistant tape on the undercoat layer by half winding. Further, a top coat is formed by using a belt member (hereinafter referred to as "milk tape") obtained by impregnating a liquid containing an acrylic latex and a film forming aid into a polyester nonwoven fabric substrate. Next, before winding the latex tape, a polypropylene resin tape having a thickness of 17 μm is wound around the outer periphery of the corrosion-resistant tape, and the barrier between the intermediate layer and the top coating layer is formed by the formation of the polypropylene resin tape. Fault. Next, the following evaluation test was performed for the primer materials of the respective test examples. The results are shown in Table 1. (Ease of Exudation) A hole having a hole diameter (diameter) of 2 mm was used to form a test body by opening a hole reaching the steel pipe in the corrosion-resistant structure. The test piece was placed in a Jill aging incubator so that the longitudinal direction of the steel pipe was horizontal and the holes were directed downward, and heated at a temperature of 90 ° C for 3 months. ○: The dripping of the undercoat material was not observed, and the undercoat material was not observed to ooze out to the surface. △: The dripping of the undercoat material was not observed, but the undercoat material was observed to seep out to the surface. ×: The dripping of the coating material was observed. (Constructive property) The degree of elongation of the primer material when the primer material was applied to the steel pipe (evaluated by visual observation) ○: Fully extended Δ: slightly extended ×: not extended [Table 1] As shown in Table 1, no bleeding was observed in the corrosion-resistant structure using the primer material of Test Example 2-5. Further, the primer materials of Test Examples 2 to 5 were excellent in workability. <Test Example 3> The corrosion-resistant adhesives shown in Tables 2 and 3 were produced using the materials of Tables 2 and 3 below. Next, the following evaluation test was performed. The results are shown in Tables 2 and 3. (Consistency) The consistency of the anti-corrosion adhesive at 0 ° C, 20 ° C, and 40 ° C was measured by the above method. (Slumping Test) Regarding the thermal deformability of the above-mentioned corrosion-resistant adhesive, an evaluation test was carried out by a method as schematically shown in Fig. 5 . First, a strip sample of 25 mm × 25 mm × 100 mm was cut out from the block of the anti-corrosion adhesive using a cutting knife to prepare a sample for evaluation (S). Then, two L-angle steels (L) of 25 mm × 25 mm were prepared, and they were placed in parallel on the top surface of the work table (D) which was horizontally placed at a distance of 50 mm as shown in Fig. 5 . . Then, the evaluation sample S is placed on the angular steel material L such that the longitudinal direction thereof is perpendicular to the angular steel material L, and the end portions of the evaluation sample S are supported by the two angular steel materials L, respectively. It is about 25 mm inside. The ambient temperature was set to 80 ° C in this state, and the degree of deformation after 12 hours was observed. Regarding the degree of deformation, the maximum distance (distortion distance) of the anti-corrosion adhesive between the two angle steels L was measured. [Table 2] [table 3] In the anti-corrosion adhesives of Test Examples 3-1 to 3-8 which contain 20 parts by mass or more of the organic bentonite powder and the mass ratio of the aluminum hydroxide powder to the calcium carbonate powder is 1.08 to 1.33 with respect to 100 parts by mass of the oil component, Compared with Test Examples 3-9, 3-111, and 3-12, the deformation distance in the slump test was small. Therefore, it is known that the corrosion-resistant adhesives of Test Examples 3-1 to 3-8 are suitable for use in putty burying of pipes having a surface temperature of high temperature (for example, 80 ° C). Further, in the anti-corrosion adhesives of Test Examples 3-1 to 3-8, the consistency at 0 ° C was higher than 30 or more in comparison with Test Examples 3-10 and 3-12. Therefore, it was found that the anti-corrosion adhesives of Test Examples 3-1 to 3-8 were excellent in construction in winter. Further, in the anti-corrosion adhesives of Test Examples 3-1 to 3-8, the consistency at 40 ° C was lower than 150 in the test examples 3-9 and 3-11. Therefore, it was found that the corrosion resists of Test Examples 3-1 to 3-8 are suitable for use in summer. <Test Example 4> The top coat materials shown in the following Tables 4 and 5 were produced using the following materials. Further, the fly ash microspheres were sieved into a sieve residue (coarse grain) and a sieve passing portion (fine grain) by using a 250 μm sieve. Waterborne Acrylic Latex Fly Ash Microspheres A: Unscreened Fly Ash Microspheres B: Screen Passing Part (fine Particles) Fly Ash Microspheres C: Screen Residues (Coarse Grains) Aluminum Tellurite System Hollow Micro Sphere (Phyllite 52/7FG) platy particles A: mica-like iron oxide plate-like particles B having an average length of 120 μm and an average length to average thickness of 10: average length 50 μm, average length to average thickness ratio Smoked cerium oxide for a mica-like iron oxide calcium carbonate of 3: BET specific surface area 200 m 2 /g Smoked ceria B: BET specific surface area 50 m 2 /g Film-forming auxiliary water and other additives Next, the following evaluation test was carried out. The results are shown in Tables 4 and 5. (Viscosity) Regarding the viscosity, the viscosity was measured at a rotation number of 20 rpm and a rotation number of 2 rpm by a B-type viscometer (single cylindrical rotary viscometer) (rotor: No. 3) (JIS Z8803: 2011). Further, the thixotropic index (TI value) was obtained by the following formula. TI value = viscosity at 2 rpm / viscosity at 20 rpm (difficulty of separation) The top coat material of the test example was allowed to stand at 5 ° C for 12 hours. Next, the ease of separation was visually observed. ×: A large separation was visually confirmed. ○: Other than ×. (Ease of Producing Drip and Easiness of Crack Formation) The tape was wound around a cylindrical member extending in the vertical direction at 5 ° C, and the top coat material of the test example was applied to the surface of the tape. Next, the difficulty in producing the drip was visually confirmed. ○: The drip was not confirmed. △: A trace amount of the liquid was confirmed. ×: A drop larger than the "△" evaluation was confirmed. Further, after coating, the top coat layer was allowed to stand at 5 ° C for 8 hours, and it was visually confirmed whether or not the top coat layer was cracked. ○: No crack was confirmed. △: A small amount of cracks were confirmed. ×: It was confirmed that the crack was more than the "△" evaluation. (Appearance of Coating) The belt member was wound around a cylindrical member extending in the vertical direction at a normal temperature (25 ° C), and the surface coating material of the test example was applied to the surface of the belt member. Next, the appearance was visually observed after 4 hours. ×: The crack was confirmed. △: No crack was confirmed, but the surface was rough. ○: ×, △ (Comprehensive evaluation) ×: At least one of the items that become × △: There is no case where there are at least × in all items, and there are at least one item in which △ is ○: ○ in all items [Table 4] [table 5] As shown in Table 4, it was found that the plate-like particles having a ratio of the average length to the average thickness of 7 to 15 and the BET specific surface area of 100 to 400 m were obtained. 2 The surface coating materials of Test Examples 5-1 to 5-5 of the smoked cerium oxide of /g were not easily separated, dripping liquid was hard to occur, and cracking was hard to occur. Further, as shown in Tables 4 and 5, it was found that the test examples 5 to 5 and 5 to 10 in which the surface coating materials of the test examples 5-1 to 5-5 were high were not easily separated, and it was difficult to separate. A drop is produced. [Reciprocal Reference to Related Applications] The present application claims priority to Japanese Patent Application No. Hei. No. Hei.