經濟部智慧財產局員工消費合作社印製 1245080 A7五、發明説明（1) 〔技術領域〕 本發明有關很適合作爲汽車車體用防銹鋼板之滑動性 優異的合金化熔融浸鋅鋼板。 〔背景技術〕 合金化熔融浸鋅鋼板，係廣泛被作爲汽車車體用防銹 鋼板使用。由於將合金化熔融浸鋅鋼板加工爲汽車車體時 進行加.壓（press)成型之故，不僅防銹特性，尙需要優異 的滑動性。 合金化熔融浸鋅鋼板之製造過程，可大別爲：將成爲 毛坯材料的鋼板浸漬於浸浴中，於鋼板表面形成熔融浸鋅 層的過程、及於具有熔融浸鋅層的鋼板上施行合金化處理 以形成合金化熔融浸鋅層的過程。 浸浴中，於鋼板表面所形成的熔融浸鋅層，係由Ζ η (鋅）與 F e (鐵）之金屬互化物（in ter metallic compound )(Γ，5 1 ，Γ )而成，因合金化處理所形成的合金化 熔融浸鋅層之滑動性，將按照其金屬互化物之組成而變動 。於是，曾經有各種關於控制將施行合金化處理前形成的 熔融浸鋅層之金屬互化合物之組合，藉以改善合金化熔融 浸鋅鋼板之滑動性的技術的提案。 例如，日本專利特開平9 一 2 0 9 1 0 6號公報中， 揭示有合金化熔融浸鋅用鋼板及合金化熔融浸鋅鋼板。此 技術，係藉由作爲毛还材料的鋼板之成份之調整，而欲形 成滑動性良好的合金化熔融浸鋅層者。但，如浸鍍過程之 本紙張尺度適用中國國家標準（CNS ) A4規;^^210X 297公釐） T"~ (請先閲讀背面之注意事項再填寫本頁) 1245080 A7 B7 經濟部智慧財產局員工消費合作社印製 五、發明説明（2) 操作條件變動，則熔融浸鋅層之組成亦變化，以致合金化 熔融浸鋅層將受其影響。因而’特開平9 一 2 0 9 1 0 6 號公報所揭示的技術而言’難於獲得良好的滑動性。 又，特開平1 1 — 2 0 0 0 0 4號公報中，揭示有滑 動性優異的合金化熔融浸鋅鋼板。該技術，係藉由於合金 化熔融浸鋅層表面使以T i (鈦）及A 1 (鋁）爲主成份 的結晶析出，而欲製造兼具滑動性及耐鍍剝離性的合金化 熔融浸鋅鋼板者。但，爲使以T i及A 1爲主成份的結晶 析出，則必須在浸鍍浴中添加T i 。另一方面，如浸鍍浴 中添加T i ，則產生T i 一 A 1系之金屬互化物（俗稱浮 渣（dross ))而附著於熔融浸鋅層之故，從浸鍍鋼板之表 面外觀而言，成爲問題。 〔發明揭示〕 本發明係爲解決如上述的問題，而以提供一種能安定 獲得優異的滑動性的合金化熔融浸鋅鋼板爲目的。 本發明人等，曾就滑動性良好的合金化熔融浸鋅層加 以詳細調查。 本發明人等，將各種合金化熔融浸鋅鋼板作爲陽極， 將硫酸鋅-氯化鈉水溶液作爲電解液，依恒電位電解法（ C 〇 111 r ο 11 e d ρ 〇 t e n t i a 1 e 1 e c t r ο 1 y s i s )電解合金化熔融浸鋅層， 並調查當時之電解性能（e 1 e c t r ο 1 y t i c b e h a v i o r )。再者，調 •查恒電位電解所需電量與滑動性之間的關係之結果，發現 浸漬於上述電解液中時之電位爲一定値以下之情形，或恒 (請先閲讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -5- 1245080 A7 B7 五、發明説明（4) 6 :電解液 7:爲設定電位之用之裝置 〔實施本發明之最佳形態〕 本發明之合金化熔融浸纟¥鋼板，在硫酸鋅一氯化鈉系 之電解液中必須爲··對飽和甘汞電解的電位在〜9 4 〇 m V至- 9 2 0 m V之範圍內而依恒電位電解法進行電解 時所流通的電量爲0 · 5 c / c m 2以下，或者，浸漬於該 電解液中時之對飽和甘汞電極的電位在一 8 5 〇 m V以下 。視作爲襯底的鋼板之組織或表面形狀，有時不一定能同 時充份滿足兩條件的情形，惟如能滿足任何一種條件，即 可達成目的。 如進行1旦電位電解時所流通的電量爲〇 · 5 c / c m 2 以下之合金化熔融浸鋅鋼板，即可在評估滑動性的各種試 驗中，獲得良好的特性。另外，作爲恒電位電解之結束時 期，則選擇隨著恒電位電解之進行而電解電流密度減少並 到達5 // A / c m 2的時期。評估滑動性的試驗可例舉圓筒 平底杯形件拉延（cupping draw )試驗。恒電位電解係在硫 酸鋅-氯化鈉系之電解液中，將合金化熔融浸鋅鋼板作爲 陽極，而對飽和甘汞電極的電位在- 9 4 0 m V至 ~ 9 2 0 m V之範圍內進行之。將電位作成—9 4 0 m V 至- 9 2 0 m V之理由，係爲在合金化熔融浸鋅層中對滑 動性影響較大的部份進行選擇性電解之故。在硫酸鋅-氯 化鈉系之電解液中進行電解之理由，係由於該電解液對合 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項存填寫本貢) -装.Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 1245080 A7 V. Description of the Invention (1) [Technical Field] The present invention relates to an alloyed molten zinc-plated steel sheet which is very suitable as an anti-rust steel sheet for automobile bodies and has excellent sliding properties. [Background Art] An alloyed molten zinc-plated steel sheet is widely used as a rust-proof steel sheet for automobile bodies. Since the alloyed molten zinc-coated steel sheet is press-formed when it is processed into a car body, it must have excellent sliding properties in addition to rust prevention properties. The manufacturing process of an alloyed molten zinc-coated steel sheet can be distinguished as follows: the process of immersing a steel sheet that becomes a blank material in an immersion bath, forming a molten zinc-plated layer on the surface of the steel sheet, and performing an alloy on the steel sheet with the molten zinc-plated layer Process of forming an alloyed molten zinc coating. In the immersion bath, the molten zinc coating layer formed on the surface of the steel plate is made of in ter metallic compound (Γ, 5 1, Γ) of Z η (zinc) and Fe (iron), because The sliding properties of the alloyed molten zinc coating layer formed by the alloying treatment will vary according to the composition of the intermetallic compound. Therefore, there have been various proposals for a technology for controlling the combination of intermetallic compounds of the molten zinc-plated layer formed before the alloying treatment, so as to improve the sliding property of the alloyed zinc-plated steel sheet. For example, Japanese Patent Laid-Open No. 9-2009 106 discloses an alloyed molten zinc-plated steel sheet and an alloyed molten zinc-plated steel sheet. This technique is intended to form an alloyed molten zinc coating layer with good sliding properties by adjusting the composition of a steel sheet as a material for wool reduction. However, if the paper size of the dip coating process is in accordance with Chinese National Standard (CNS) A4; ^^ 210X 297 mm) T " ~ (Please read the precautions on the back before filling this page) 1245080 A7 B7 Intellectual Property of the Ministry of Economic Affairs Printed by the Bureau's Consumer Cooperatives V. Description of the Invention (2) When the operating conditions change, the composition of the molten zinc coating will also change, so that the alloyed molten zinc coating will be affected by it. Therefore, it is difficult to obtain a good sliding property in the technique disclosed in JP-A-Hei 9-2009106. In addition, Japanese Patent Application Laid-Open No. 11-2004 has disclosed an alloyed molten zinc-plated steel sheet having excellent sliding properties. This technology is intended to produce alloyed melt-dip with both sliding properties and resistance to plating peeling by precipitating crystals containing Ti (titanium) and A 1 (aluminum) as the main components due to the surface of the alloyed molten zinc-dip layer Those who are zinc plate. However, in order to precipitate crystals containing Ti and A1 as main components, Ti must be added to the dipping bath. On the other hand, if T i is added to the dipping bath, T i -A 1 series intermetallic compounds (commonly referred to as dross) are generated and adhere to the molten zinc coating layer. In terms of it, it becomes a problem. [Disclosure of the Invention] The present invention has been made in order to solve the problems described above, and an object thereof is to provide an alloyed molten zinc-coated steel sheet which can stably obtain excellent sliding properties. The inventors of the present invention investigated the alloyed molten zinc coating layer having good sliding properties in detail. The present inventors have used various alloyed molten zinc-impregnated steel plates as anodes and zinc sulfate-sodium chloride aqueous solution as electrolytes, according to a constant potential electrolytic method (C 〇111 r ο 11 ed ρ 〇tentia 1 e 1 ectr ο 1 ysis) electrolytically alloying the molten zinc coating and investigating the electrolytic performance at that time (e 1 ectr ο 1 yticbehavior). In addition, as a result of adjusting and checking the relationship between the amount of electricity required for potentiostatic electrolysis and the sliding property, it was found that the potential when immersed in the electrolyte described above is constant or below, or constant (Fill in this page) This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) -5- 1245080 A7 B7 V. Description of the invention (4) 6: Electrolyte 7: Device for setting potential [Implement this The best form of the invention] The alloyed molten immersion steel sheet of the present invention must be in a zinc sulfate-sodium chloride-based electrolytic solution. The potential for electrolysis of saturated calomel is ~ 9 4 0 m V to-9 In the range of 20 m V, the amount of electricity flowing during electrolysis according to the potentiostatic electrolytic method is 0 · 5 c / cm 2 or the potential of the saturated calomel electrode when immersed in the electrolyte is at 8 500 m V or less. Depending on the structure or surface shape of the steel plate as the substrate, sometimes the two conditions may not be fully satisfied at the same time. However, if either of these conditions can be satisfied, the purpose can be achieved. If the alloyed molten zinc-coated steel sheet with a current of 0.5 c / cm2 or less when conducting 1 denier potential electrolysis, good characteristics can be obtained in various tests for evaluating sliding properties. In addition, as the end time of the potentiostatic electrolysis, a period in which the electrolytic current density decreases and reaches 5 // A / cm 2 as the potentiostatic electrolysis proceeds is selected. The test for evaluating the sliding property may be exemplified by a cup flat draw cup drawing test. The potentiostatic electrolysis is based on zinc sulfate-sodium chloride electrolyte. The alloyed molten zinc-plated steel plate is used as the anode, and the potential for the saturated calomel electrode is between-9 40 m V to ~ 9 2 0 m V. Perform it within the scope. The reason for making the potential from -940 mV to -920 mV is to selectively electrolyze the part of the alloyed molten zinc coating that has a greater effect on the sliding properties. The reason for electrolysis in zinc sulfate-sodium chloride based electrolyte is that the electrolyte applies the Chinese National Standard (CNS) A4 specification (210X297 mm) to the paper size. (Please read the precautions on the back first to save (Fill in the bonbon)-loaded.
•tT 經濟部智慧財產局員工消費合作社印製 1245080 Μ 五、發明説明（5) (請先閲讀背面之注意事項再填寫本頁} 金化熔融浸鋅層之化學溶解作用較小，且不易受浸鑛層表 面所生成的氧化皮膜等之影響之故。另外，如欲更換電解 液的情形，由於隨著其更換，而合金化熔融浸鋅層中能對 滑動性影響較大的部份進行選擇性電解之電位會變化之故 ，.必須依靠預備試驗事先確認其變化。 如將合金化熔融浸鋅鋼板浸漬於硫酸鋅-氯化鈉系電 解液中時之電位愈低，則可觀察到進行恒電位電解時所流 通的電量愈小的傾向。將恒電位電解裝置1之一例，表示 於第1圖及第2圖。將合金化熔融浸鋅鋼板（試料）2作 爲陽極，對電極（c 〇 u n t e r e 1 e c t r 〇 d e )(陰極）3則使用白 金環或白金板等，分別使用白金線5，與爲設定電位之用 之裝置7結線。電位之設定較佳爲使用恒電位裝置（ potentiostat )設定之，而作爲電位基準使用飽和甘汞電極 ，銀一氯化銀電極等之參考電極（RE，reference electrode) 4 〇 經濟部智慧財產局員工消費合作社印製 電解液6，使用合金化熔融浸鋅層之化學溶解作用小 ，且不易受表面所生成的氧化皮膜等之影響的硫酸鋅-氯 化鈉水溶液。硫酸鋅濃度較佳爲1至5 0質量％，氯化鈉 濃度較佳爲1至3 0質量％。本發明之合金化熔融浸鋅鋼 板，並不因製造方法而有所規定，惟可依例如特開平7 -4 1 9 2 5號或特開平1 0 - 1 3 0 8 0 2號公報所揭示 的方法控制合金化條件，再緻細調整浸鍍、合金化條件， 即可製造之。特別是將浸鍍層中之A 1含量控制爲偏高之 方式，即可控制爲較通常者爲高溫合金化條件。 本紙張尺度適用中國國ϋ準（CNS ) Α4ϋ7210Χ297^^ ) ~ ~ 1245080 A7 ______ _ 五、發明説明（6) (請先閱讀背面之注意事項再填寫本頁) 又，爲生成具有本發明之合金化熔融浸鋅鋼板之特徵 的合金化熔融浸鋅層起見，較佳爲作成浸鋅層中之F e含 有率9至13質量％，A1含有率〇 · 20至0 · 30質 量％，Pb (鉛）含有率〇 · 〇〇2至0 · 2質量％、 Μη (錳）含有率〇 . 〇〇1至0 . 1質量％，Si (矽 )含有率〇 . 〇〇〇1至〇 · 〇1質量％、P (磷）含有 率〇.0001至0.01質量％。“]1、31、？不需 要同時被含有。 鋼種而言，並不予以限定，惟例如極低碳鋼（一例爲 C0.〇020 — Si0.01-Mn0.10 — P0.01-A10.030 - Ti0.025- Nb( 鈮）0 · 0 1 0質量％ )等較好用。特別是如能充分滿足 B (硼）含有率〇 . 0002至0 . 015質量％、Sb (銻）含有率0 · 002至0 . 015質量％之任一’或 兩者，則可製得具有滑動性特別優異的浸鍍層的鋼板。 <實施例> 經濟部智慧財產局員工消費合作社印製 在轉爐中熔製具有第1表所示組成的極低碳鋼之後’ 依連續鑄造作成扁坯（slab )。將此扁坯作成扁坯加熱溫度 爲1 1 5 0至1 2 5 0 °C、熱軋過程之最終精煉溫度爲 9 2〇t、於5 5 0 °C下捲取，以製作3 · 2 m m厚之熱 軋板卷料，以酸洗去除黑皮後進行冷軋，作成〇 · 8 m m 厚之冷軋鋼板。 -9- 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） 1245080 A7 Β 五、發明説明（7) 經濟部智慧財產局員工消費合作社印製 〇 啊 〇 o o ί 卜 o o o ιπίπτί] o 111网 t—H o o τπΐΐπΐ] un 111同 CS o o S mlml] o 111同 CO o o _ r—H ft o o s mlml] 111网 I 1¾ o r-H o m|inl] … CO t—H o o Ϊ o CO Λ o o 〇 I---------批衣--(請先閱讀背面之注意事項再填寫本頁)• tT printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 1245080 Μ 5. Description of the invention (5) (Please read the precautions on the back before filling out this page} The chemical dissolution effect of the aluminized molten zinc coating is less, and it is not susceptible The effect of the oxide film and the like formed on the surface of the leaching layer. In addition, if the electrolyte is to be replaced, the part of the alloyed molten zinc leaching layer that has a large effect on the sliding property will be changed with the replacement. The potential of selective electrolysis changes. It is necessary to confirm the change in advance by relying on preliminary tests. The lower the potential when the alloyed molten zinc-plated steel sheet is immersed in a zinc sulfate-sodium chloride-based electrolyte, it can be observed The amount of electricity flowing during potentiostatic electrolysis tends to decrease. An example of potentiostatic electrolysis device 1 is shown in Figs. 1 and 2. An alloyed molten zinc-plated steel sheet (sample) 2 is used as an anode, and a counter electrode ( c 〇untere 1 ectr 〇) (cathode) 3 use platinum ring or platinum plate, etc., use platinum wire 5, respectively, and the device 7 for setting the potential. The potential setting is preferably constant. Potentiostat is set, and reference electrodes (RE, reference electrode) such as saturated calomel electrode, silver-silver chloride electrode, etc. are used as the potential reference 4 〇 Electrolyte printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs6, A zinc sulfate-sodium chloride aqueous solution that has a small chemical dissolution effect and is not easily affected by the oxide film and the like formed on the surface, and the zinc sulfate concentration is preferably 1 to 50% by mass, and sodium chloride is used. The concentration is preferably from 1 to 30% by mass. The alloyed molten zinc-coated steel sheet of the present invention is not limited by the manufacturing method, but may be according to, for example, Japanese Patent Application Laid-Open No. 7 -4 1 9 2 5 or Japanese Patent Application Laid-Open No. 10 -The method disclosed in No. 1 3 0 8 0 2 can be manufactured by controlling the alloying conditions, and then finely adjusting the conditions of dip plating and alloying. In particular, the method of controlling the A 1 content in the dip coating to a high level It can be controlled to be a higher temperature alloying condition than usual. This paper size is applicable to China National Standard (CNS) Α4ϋ7210 × 297 ^^) ~ ~ 1245080 A7 ______ _ V. Description of the invention (6) (Please read the precautions on the back first Fill in again (This page) In order to form an alloyed molten zincized layer having the characteristics of the alloyed molten zincized steel sheet of the present invention, it is preferred that the Fe content in the zincized layer be 9 to 13% by mass, and A1 contains The ratio of 0.2 to 0. 30% by mass, the content of Pb (lead) from 0.002 to 0.2% by mass, the content of Mn (manganese) from 0.001 to 0.1% by mass, Si (silicon ) The content rate is from 0.0001 to 0.001 mass%, and the P (phosphorus) content is from 0.0001 to 0.01 mass%. "] 1, 31,? Need not be included at the same time. As for the steel type, it is not limited, but for example, very low carbon steel (an example is C0.〇020 — Si0.01-Mn0.10 — P0.01-A10. 030-Ti0.025- Nb (niobium) 0 · 0 1 0 mass%), etc. are particularly useful, especially if it can sufficiently satisfy the B (boron) content ratio of 0.002 to 0.015 mass%, and Sb (antimony) content Any one or both of the ratios from 0. 002 to 0.015 mass% can be used to produce a steel sheet having an impregnated coating having particularly excellent sliding properties. ≪ Examples > After melting the ultra-low carbon steel having the composition shown in Table 1 in a converter, the slab is made by continuous casting. The slab is made into a slab and the heating temperature is 1 150 to 1250 ° C, The final refining temperature of the hot rolling process is 920 t, and it is coiled at 5 50 ° C to produce a 3.2 mm thick hot-rolled sheet coil. The black skin is removed by pickling, and cold rolling is performed. · 8 mm thick cold-rolled steel sheet. -9- This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) 1245080 A7 Β 5. Description of the invention (7) Ministry of Economic Affairs wisdom Printed by the Consumer Cooperative of the Property Bureau 〇 啊 〇oo ί oo o ιπίπτί] o 111 net t—H oo τπΐΐπΐ] un 111 same as CS oo S mlml] o 111 same as CO oo _ r—H ft oos mlml] 111 net I 1¾ o rH om | inl]… CO t—H oo Ϊ o CO Λ oo 〇I --------- batch clothes-(Please read the precautions on the back before filling this page)
、1T 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ 297公釐） -10- 1245080 A7 B7 五、發明説明（8) 將此冷軋鋼板，於連續熔融浸鋅生產線中，在退火溫 度7 9 0至8 3 0 °C下，製作合金化熔融浸鋅鋼板。作成 侵入浸鑛浴中之侵入板溫爲4 6 0至4 7 0 t：、浸鍍浴之 浴溫爲4 6 0至47 0 °C、合金化溫度爲4 9 0至5 3 0 °C。作成單面之浸鍍附著量爲4 〇至5 〇 g / ηι 2，按兩面 之浸鍍附著量爲同一之方式製造之。 將合金化熔融浸鋅鋼板打穿爲直徑1 5 m 1Ή之圓形後 ’以對飽和甘汞電極的電位一 9 3 0 m V進行恒電位電解 。電解液使用2 0質量％硫酸鋅一 1 〇質量％氯化鈉水溶 液。進行電解至電流密度到達5 // A / c m 2，並從電解開 始測定所流通的電量。電解所需時間爲1 〇至2 〇分鐘程 度。恒電位電解之終點判定，係以電解電流密度減少而達 到5 /z A / c m 2的時期。但，由於在終點附近之電流値較 小之故，即使爲終點判定而選擇若干低的値，亦不會影響 電量之測定’仍然能獲得正確的評估。 又，將打穿爲上述之圓形的鋼板作爲試片，測定對試 片之上述電解液中的飽和甘汞電極的浸漬電位。 爲比較之用的滑動性之評估，係在塗上1 · 5 g / nl 2 之通常之防銹油之後，進行直徑3 3 m m之圓筒平底杯形 件拉延試驗，求出極限拉延係數。極限拉延係數之數字愈 小，表示良好的滑動性。評估點係將極限拉延係數2 %以 上定爲1 、1 · 9至2 · 0%定爲2，1 · 8至1 . 9% 定爲3、1 .7至1 .8%定爲4，1 .7%以下定爲5 ’並將結果表不於第2表。 本紙張尺度適用中.國國家標準（CNS ) A4規格（210X297公釐） I---------^-- (請先閱讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -11 - 1245080 A7 B7 五、發明説明（9) 經濟部智慧財產局員工消費合作社印製 滑動性評估結果 I τ—Η τ-Η r-H τ—H CO CO VO 恒電位電解時之電解電量 (C/cm2) 0.13 ι j 0.16 t—i 0.30 0.47 0.47 0.52 0.55 浸漬電位 (mV vs SCE) ο 〇〇 OO OO O OO C<l OO 1 s 1 OO C<l OO 3之含量 Fe(質量％) Ό VsD Η r—i IT) r—H 10.4 C7< Cs| a； § o o 浸鍍層弓 Zn(質量％) 90.4 ι_ \ \ 88.3 88.5 89.6 t—H 90.8 9,0 ! 90.0 單面之浸鍍附著量 ! (g/m2) ο O CO 本發明1 本發明2 本發明3 -1 本發明4 J 本發明5 本發明6 本發明7 比較例 (請先閱讀背面之注意事項再填寫本頁) -窣· * 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -12- 1245080 A7 --B7 五、發明説明（〇 11 S Q · 5 C / c m 2以下之浸鑛鋼板之滑動性均「評 Ιέ 3」Μ下，而呈現有良好的滑動性，相對地，在超過 0 · 5 C / c m 2的比較例中，滑動性爲「評估點5」而較 劣°尤其是電量〇 . 3 c / c m 2以下之浸鍍鋼板均爲「評 估點1」’而呈現特別優異的滑動性。 % ’浸漬電位爲一 8 5 0 m V以下之鋼板之滑動性均 爲「評估點3」以下，而呈現良好的滑動性。 〔產業上之利用可能性〕 #胃明可提供能安定獲得優異的滑動性的合金化熔融 浸鋅鋼板。 I---------批衣------、訂 (請先閲讀背面之注意事項再填寫本頁)、 1T This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210 × 297 mm) -10- 1245080 A7 B7 V. Description of the invention (8) The cold-rolled steel sheet is used in a continuous molten zinc coating production line at the annealing temperature At 790 to 830 ° C, alloyed molten zinc-plated steel sheets are produced. The temperature of the intruded plate in the immersion bath is 4 60 to 4 7 0 t: the bath temperature of the immersion bath is 4 60 to 47 0 ° C, and the alloying temperature is 4 9 0 to 5 3 0 ° C . The single-side immersion plating adhesion amount is 40 to 50 g / η 2, and it is manufactured in such a manner that the two-side immersion plating adhesion amount is the same. After perforating the alloyed molten zinc-plated steel sheet into a circular shape with a diameter of 15 m 1, a constant potential electrolysis was performed on the potential of the saturated calomel electrode-930 mV. As the electrolytic solution, a 20% by mass zinc sulfate-10% by mass sodium chloride aqueous solution was used. Perform electrolysis until the current density reaches 5 // A / c m 2, and measure the amount of electricity flowing from the beginning of the electrolysis. The time required for electrolysis is in the range of 10 to 20 minutes. The determination of the end point of potentiostatic electrolysis is a period when the electrolysis current density decreases and reaches 5 / z A / cm 2. However, since the current 値 near the end point is small, even if a few low 値 is selected for the end point determination, it will not affect the measurement of the electric quantity, and the correct evaluation can still be obtained. In addition, a steel plate punched into the above-mentioned circular shape was used as a test piece, and the immersion potential of the saturated calomel electrode in the electrolyte of the test piece was measured. For the evaluation of the sliding property for comparison, after applying ordinary rust preventive oil of 1.5 g / nl 2, a drawing test of a cylindrical flat-bottomed cup with a diameter of 3 3 mm is performed to determine the ultimate drawing. coefficient. The smaller the number of the ultimate drawing coefficient, the better the sliding property. The evaluation points are defined as 1 for the ultimate drawing coefficient of 2% or more, 2 for 1.9 to 2.0%, 3 for 1.8 to 1.9%, and 4 for 1.7 to 1.8%. The value is less than 1.7% as 5 'and the result is shown in Table 2. The size of this paper is applicable. National Standard (CNS) A4 (210X297 mm) I --------- ^-(Please read the precautions on the back before filling this page) Order the intellectual property of the Ministry of Economic Affairs Printed by the Bureau's Consumer Cooperatives -11-1245080 A7 B7 V. Description of the Invention (9) Printed sliding evaluation results of the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs I τ—Η τ-Η rH τ—H CO CO VO potentiostatic electrolysis Electrolytic capacity at the time (C / cm2) 0.13 ι j 0.16 t-i 0.30 0.47 0.47 0.52 0.55 Dipping potential (mV vs SCE) ο 〇〇OO OO O OO C < l OO 1 s 1 OO C < l OO 3 Fe (mass%) Ό VsD Η r—i IT) r—H 10.4 C7 < Cs | a; § oo Dip coating bow Zn (mass%) 90.4 ι_ \ \ 88.3 88.5 89.6 t—H 90.8 9,0! 90.0 single (G / m2) ο O CO The present invention 1 The present invention 2 The present invention 3 -1 The present invention 4 J The present invention 5 The present invention 6 The present invention 7 Comparative example (Please read the precautions on the back first (Fill in this page)-窣 · * This paper size applies to China National Standard (CNS) A4 specification (210X297 mm) -12- 1245080 A7 --B7 V. Description of invention (〇 The sliding properties of immersed steel plates below 11 SQ · 5 C / cm 2 were all evaluated as "I 3", and they exhibited good sliding properties. In contrast, in the comparative examples exceeding 0 · 5 C / cm 2, The sliding property is "evaluation point 5" and inferior °, especially the immersion-plated steel sheets below 0.3 c / cm 2 are "evaluation point 1" and exhibit particularly excellent sliding properties.% 'Immersion potential is -8 The sliding properties of steel plates below 50 m V are all below "Evaluation Point 3" and exhibit good sliding properties. [Industrial Possibilities] #Weiming can provide alloying and melting that can stably obtain excellent sliding properties. Zinc-coated steel sheet. I --------- batch clothes ------, order (please read the precautions on the back before filling this page)
經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -13-Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) A4 (210X297 mm) -13-