200842209 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種以鍍鋅代替鐘錄 ，特別是可運用於某些五金零件的防備工藝 &丨士 ^ τ什的防5隻裝飾性電鍍，於1 外表之傳統防護性鍍鋅層上施铲一层 、八 金光亮鑛層，俾可在一‘使H 飾性之錫基合 鐘層者。皁了纟&使用條件下取代昂貴的電鍍錦路 【先前技術】 ，二：般鐵金屬表面的電鍍層體系’大致可分為防護 裝=鑛層體係和防護鍍層體系，前者裝飾 備 ，後者主要側重其防謨性，而扭祕μ P 裳備 ㈣技· 據鍍層與鐵金屬基體的電 位關係，淹可分為陽極性防護 扪电 體係兩類；其中： 請層體係和陰極性防護鍍層 …、用於鐵金屬上電鍍防護裝飾性錄/路或鋼/錄/ :鑛層體係，因其鍍層電位較基體鐵金屬電位正、 極性防護鑛層’該體系的電鑛層必須達一定厚 = 2針孔，使制對鐵基體形成遮罩賴作用，從= 基體金屬遭腐蝕損壞。 止 一、鋼鐵零件廣泛换用恭' 你七 ““ 刼用电鍍鋅來防止其生銹腐蝕，因 為鋅鑛層的電位較基體鐵金屬 屬基體而言，屬陽極性防護 ::腐一本身來保護基體鐵金屬; :層對鐵基，保護又稱為「犧牲性保護鍍層」，過去電 斟甘& 緞辞層表面不再加其他鍍層，而是 、、進行鉻酸鹽鈍化處理’以進—步提高鑛鋅層的相性 200842209 惟，由於銅和鎳的價格近年來已提高了數倍，防護裝 飾性錦/鉻或銅/鎳//鉻錢層體系、面臨極大的成本問題與 壓力，相較之下，鍍鋅層價格低廉，但存在裝飾性不足的 π題疋以尋求-種在—定使用條件下能取代防護裝飾性 鎳/鉻或銅/鎳/鉻鍍層體系的新型防護裝飾性鍍層體系 ’乃成為業界關注且致力研發的目標。 【發明内容】 本發明之主要目的乃在於提供一種新型防護裝飾性鍍 鋅層體系及其製備卫藝，特収在傳統防護性鑛鋅層上^ 鑛一層具有祕層裝飾外觀的防護性錫基合金光亮鐘層， 使其能在-定使用條件下取代防護裝飾性錄/鉻或鋼;錄 /鉻鍍層體系，達節約鎳、鉻金屬資源、顯著降低生產成 本、有利環境保護和實現電鍍清潔生產之目的。 •為達前揭目的，本發明係通過以下技術方案來實現的 •即’本發明之-種新型防護裝飾性鍍鋅層體系及 工藝’其防魏飾性鑛鋅層體系，包括在鐵基體上ς次電 =鍍鋅層、錫基合金光亮裝飾鍍層、以及其表面純化膜 層或表面清漆層，其特徵在於在傳統防護性 覆極具裝飾性的錫基合金光亮鍍層，形成—外觀與 鉻：層相似的鍍層表面’俾在一定鑛層厚度範圍内其防護 同厚度的鎳鉻鍍層’ ®而能在-定條件下使用 的零件（如：電風扇網罩、超市貨架...等） 的鎳鉻鍍層，達到節約鎳金屬資源的目的。 儿 【實施方式】 200842209 有關本發明之製備方法及達成之技術手段，謹在此舉 例具體說明於后： 根據本發明防護裝飾性鋅鍍層體系的製備工藝，主要 包括鐵基體前處理、電鍍鋅、鋅鍍層的化學或置換型去霧 拋光、電鍍錫基合金鍍層、錫基合金鍍層表面鈍化處理或 表面塗覆清漆、烘乾。 而製備本發明防護裝飾性鍍辞體系的工藝步驟如下： 1、 鐵基體零件鍍前除油酸洗—清洗—電鍍鋅—清洗 ( 置換型去霧抛光—清洗—電鑛錫一始一鋅或錫一銘光亮 锻層―鑛青銅（或黑鎳或黃金）清洗—鈍化—清洗—乾燥 Ο 2、 鐵基體零件鍍前除油酸洗—清洗—電鑛鋅—清洗 ^置換型去霧拋光—清洗—電鍍錫一敍一鋅或錫一銘光亮 錢層〜鍍青銅（或黑鎳或黃金）清洗—乾燥—塗覆清漆— 供乾或自然乾燥。 ^ 上述兩種工藝可根據實際需要選擇一種實施，而由於 1 第2種工藝是在錫一钻一鋅或錫一鈷光亮鍍層表面上塗覆 β漆’所以避免了涉及六價鉻的水溶液的鈍化處理，實現 /月/糸生產環保要求，而且防腐餘性和防變色性比鈍化的 更好。 而刚述之鍍前除油酸洗與一般鋼鐵件鍍鋅前處理基本 相同，故不再予贅述，其他相關步驟則再予闡述如下： 電鍍鋅： 鍍鋅可用氯化鉀、氯化錄、鋅酸鹽或氰化的光亮性鑛 辞溶液，但以光亮氯化鉀鍍鋅溶液為更佳，一是因為它有 200842209 車又好的整平性，出光後鍍層光亮度好，在其上面施鍍一層 錫p鈷一鋅或錫一鈷光亮鍍層，可獲得外觀更接近光亮鍍 錄後的鍍鉻層，甚至達到從外觀上幾乎難以區分兩種鑛層 體f的程度；二是對環境污染少；三是節能，可比鋅酸鹽 或氰化鍍鋅能降低電耗5 〇 %左右。 下面…出種性旎極好的光亮氯化鉀鍍鋅配方和工藝 i卞件可比同類光売氯化鉀鍍鋅工藝縮短電鍍時間2 〇 % 心右該工藝既適合挂卜鍍也適宜滾鍍，滾鍍時電流密度要 :用下限’如〇 · 5〜◦ · 8 A/d ，而掛鍍時陰極採 =動的更好，移動速度為8 4 2次/心η，而對其 ==鍍鋅的㈣則可參考㈣“㈣㈣ 位的技術資料。 光亮氯化钾鑛鋅配方和操作條件. 氣化鉀 氣化鋅 硼酸 Z L柔軟劑 Z L光亮劑 Ρ Η值 溫度 陰極電流密度 鍍層厚度200842209 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a kind of anti-preparation process for galvanizing instead of clock recording, in particular, it can be applied to certain hardware parts & Sex plating, on the traditional protective galvanized layer of 1 appearance, a layer of shovel, eight gold bright mineral layer, can be used to make the H-based tin-based bell layer. Soap 纟 & use of the replacement of expensive electroplating Jin [previous technology], two: the ferrous metal surface of the plating system 'can be roughly divided into protective equipment = ore system and protective coating system, the former decoration, the latter Mainly focus on its anti-cracking properties, and the twisted μ P 裳 ( (4) technology · According to the potential relationship between the coating and the iron metal matrix, flooding can be divided into two types of anodic protective 扪 electric system; ..., for the plating protection of iron metal on the decorative record / road or steel / record /: layer system, because its plating potential is positive compared with the base iron metal potential, the polarity of the protective layer 'the system's electric ore layer must reach a certain thickness = 2 pinholes, which make the masking effect on the iron matrix, from the corrosion of the base metal. First, the steel parts are widely used. Christine 'you seven' "Use galvanized zinc to prevent rust and corrosion, because the potential of the zinc ore layer is anodic protection compared to the base iron metal matrix:: rot itself To protect the base iron metal; : layer-to-iron base, protection is also called "sacrificial protective coating". In the past, the surface of the satin layer was no longer added with other coatings, but chromate passivation was performed. To improve the phase of the mineral zinc layer by step-by-step. 200842209 However, since the price of copper and nickel has been increased several times in recent years, the decorative decorative chrome/chromium or copper/nickel/chromium layer system is facing a huge cost problem. Pressure, in contrast, the galvanized layer is inexpensive, but there is a lack of decorative π-question to seek a new type of protective nickel/chromium or copper/nickel/chromium coating system. The protective decorative coating system has become the focus of the industry and is committed to research and development. SUMMARY OF THE INVENTION The main object of the present invention is to provide a novel protective decorative galvanized layer system and a preparation technique thereof, which are specially provided on a conventional protective mineral zinc layer, and a protective tin base having a secret layer decorative appearance on the first layer. The alloy bright clock layer enables it to replace the protective decorative record/chromium or steel under the conditions of use; the recording/chromium plating system can save nickel and chrome metal resources, significantly reduce production cost, protect the environment and achieve electroplating cleaning. The purpose of production. • For the purpose of the prior disclosure, the present invention is achieved by the following technical solutions: that is, a novel protective decorative galvanized layer system and process of the present invention, the anti-weaving mineral zinc layer system, including the iron matrix Upper ς 电 = galvanized layer, tin-based alloy bright decorative coating, and its surface-purified film layer or surface varnish layer, characterized by a traditional protective coating of tin-based alloy bright coating, forming - appearance and Chromium: A layer of similarly coated surface '俾 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 防护 镍 镍 镍 镍 镍 镍 镍 镍 镍 镍 镍 零件 零件 零件 零件 零件 零件 零件 零件 零件Nickel-chromium plating to achieve the purpose of saving nickel metal resources. [Embodiment] 200842209 The preparation method and the technical means for achieving the present invention are specifically illustrated hereafter: The preparation process of the protective decorative zinc plating system according to the present invention mainly includes iron matrix pretreatment, electrogalvanizing, Chemical or displacement defogging polishing of zinc coating, electroplating of tin-based alloy coating, surface passivation of tin-based alloy coating or surface coating varnish, drying. The process steps for preparing the protective decorative plating system of the present invention are as follows: 1. Iron base parts before plating, degreasing, pickling, cleaning, electroplating, zinc plating, cleaning (replacement type defogging polishing, cleaning, electroforming tin, zinc or Tin Yiming bright forging layer - mine bronze (or black nickel or gold) cleaning - passivation - cleaning - drying Ο 2, iron base parts before plating degreasing pickling - cleaning - electric mine zinc - cleaning ^ displacement type defogging polishing - Cleaning - electroplating tin - a zinc or tin - a bright light layer ~ bronze (or black nickel or gold) cleaning - drying - coating varnish - for dry or natural drying. ^ The above two processes can be selected according to actual needs Implementation, and since the second process is to coat the surface of the tin-tin-zinc or tin-cobalt bright coating with β-paint, the passivation treatment of the aqueous solution involving hexavalent chromium is avoided, and the environmental requirements for the production of /month/糸 are achieved. Moreover, the anti-corrosion and anti-tarnishing properties are better than the passivation. The pre-plating degreasing and pickling just described is basically the same as the pre-galvanizing treatment of general steel parts, so it will not be described again. Other relevant steps are explained as follows: Galvanized: Zinc plating can be used as a bright mineral solution of potassium chloride, chloride, zincate or cyanide, but it is better to use bright potassium chloride galvanizing solution. First, because it has good flatness of 200842209 car. After the light is emitted, the plating brightness is good, and a layer of tin p-cobalt-zinc or tin-cobalt bright plating is applied thereon, so that the chrome layer which is closer to the bright plating can be obtained, and even the two minerals are hardly distinguished from the appearance. The degree of layer f; the second is less environmental pollution; the third is energy saving, which can reduce the power consumption by about 5 〇% compared with zincate or cyanide galvanizing. The following... excellent bright potassium chloride galvanizing Formulation and process i 可 可 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 缩短 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心 心~◦ · 8 A/d, while the cathode plating is better when moving, the moving speed is 8 4 2 times / heart η, and the == galvanized (4) can refer to (4) "(4) (four) position of technical information Bright potassium chloride ore zinc formula and operating conditions. Gasification potassium vaporized zinc boric acid ZL softener ZL bright Ρ Η value of temperature of the cathode current density plating thickness
200〜230g/L 50〜l〇Og/L200~230g/L 50~l〇Og/L
23〜28g/L 20〜25ml/L 1 〜2 m 1 / l 4 · 8 〜5 · 6 1 〇 〜5 〇 °。 0 · 5 〜5 A / d m2 $ 8微米 置換型去霧拋光：23~28g/L 20~25ml/L 1~2 m 1 / l 4 · 8 ~ 5 · 6 1 〇 ~5 〇 °. 0 · 5 〜 5 A / d m2 $ 8 μm Displacement defogging polishing:
置換型去霧拋光劑 1 5 D〜α η ADisplacement type defogging polishing agent 1 5 D~α η A
JU〜200ml/L 200842209 水 餘量 溫度 室溫 時間 5〜1 Os 電鐘錫一始一辞光亮鑛 焦磷酸鉀 氣化亞錫 氣化钻 氣化鋅 代鉻穩定劑 代鉻添加劑 溫度 陰極電流密度 電鍍時間 鍍層厚度 陽極JU~200ml/L 200842209 Water balance temperature room temperature time 5~1 Os Electric bell Tin begins with a bright mineral pyrophosphate potassium vaporized stannous gasification drill gasification zinc chrome stabilizer chrome additive temperature cathode current density Plating time plating thickness anode
層配方和工藝條件： 240〜280g/L 25〜30g/L 8 〜1 2 g / LLayer formula and process conditions: 240~280g/L 25~30g/L 8~1 2g / L
5 〜1 0 g / L5 to 1 0 g / L
40〜60ml/L 20〜30ml/L40~60ml/L 20~30ml/L
2 0 〜4 5 °C 0· 5 〜1. 5A/dm2 3 〜5 m i η 0 · 5〜1 . 5微米 錫板/石墨 電鑛錫一 鈷 光亮鐘 層配方 和 工 藝 條件 • 焦磷酸鉀 2 4 0 2 8 0 g / L 氯化亞錫 3 0 3 5 g / L 氯化钻 8 1 2 g / L 代鉻穩定 劑 2 0 r^/ 4 0 m 1 / L 代鉻添加 劑 2 0 3 0 m 1 / L 溫度 2 0 4 5 °C 陰極電流 密 度 0 5 1 5 A /dm 200842209 電鍍時間 鍍層厚度 陽極 3 〜5 m i n 〇 · 5〜1 · 5微米 錫板/石墨 如前述第1種製備工藝採電鍍 舌辦既友 緞鎢一鈷—鋅或錫一鈷光 7C鍍層表面鈍化處理，然後鈍化— 缺點是·· β洗—乾無的方法，其 1、 鉻酸鹽純化溶液有毒有害； 2、 鍍層易變色和耐磨性差。 是以，如採用鈍化處理 低鉻鈍化處理配方和工藝： 5ml/L，溫度為室溫， 鈍化後清洗並乾燥。 ，則應採用低鉻鈍化處理，其 重鉻酸納5 g/L，醋酸3〜 鈍化時間0 · 5〜lmin， ❹弟J種製備工藝在電鑛錫—銘—鋅或錫—銘代鉻 鍍層表面塗覆漆層的方式，其優點是： 1、 能較長久保持鍍層光亮的外觀； 2、 可進一步提高鍍層的耐蝕性和耐磨性； 3、 鍍後不需鈍化處理，可完全摒棄有害的六價鉻。 ^其塗覆清漆的種類可根據產品需要，並結合漆品的烘 乾溫度、漆膜硬度和保色性等綜合性指標考慮，加以選擇 為更環保考慮，如對產品要求不太高的話，特別是小 7件也可塗覆水溶性清漆，塗覆水溶性清漆前，零件在 清洗後不需乾燥，但要求最後一道清洗用去離子水。 本發明所獲得的鍍層外觀與防護裝飾性的光亮鎳/絡 Ί0" 200842209 =很以達到fL真的程度’而在抗卿能 μ^ X曰在1 〇微米以下的同樣鎳/鉻鍍層相比，政 _，過鎳/鉻鍍層，這是因為該鍍層體系是陽極 的關係，陽極性鍍層是靠鍍層的犧牲來保護基體金 德X腐1虫’只有當鑛層全部腐餘掉後，基體金屬才開始 搞辦鎳’鉻鍍層的電位比基體鐵的電位正，目而屬於陰 錢層，陰極性鍍層對基體金屬是屬於機械性的 保農匕包覆在基體金屬表面，使鐵金屬與大氣隔絕 ，因鎳鉻鐘層本身具有極佳的抗腐錄，這樣雖可使鐵基 -免^腐ϋ但㉜極性錢層在其鐘層較薄日夺，往往是多孔 陡的/朝濕的空氣得以透過鍍層的孔隙達到鐵基體，使鐵 從鎳鉻鍍層下面產生錄敍，並逐漸從孔隙處向内部擴展， 所，鍍層常會有銹點出,見，日子一久，有時由表面上 看去退可以，但鍍層卻能剝落下來，待鍍層剝去後，可看 到裡面的鐵已經銹得很嚴重了，所以陰極鑛層只有在錢層 達到：定厚度日寺（如鍍鎳層要求達到20微米以上），鍍 層才月b /又有孔隙’才會有較好的抗蝕性，但陽極性的辞鍍 層並不會發生上述現象，只有當鍍層全部腐蝕後，基體的 鐵才會生錄。 而在傳統工藝中，鍍鋅層上是不鍍其他鍍層的，也認 為疋不忐鍍其他鍍層的，這是因為辞是兩性金屬，在酸性 和鹼性條件下，鋅都會腐蝕，而錫一鈷一鋅或錫一鈷代鉻 鍍層是焦磷酸鹽鍍液，是弱鹼性的，對鋅鍍層在短時間内 不會腐蝕，而且這兩種鍍層的外觀接近鉻鍍層，因而從理 瀹上推理，這兩種鍍層有可能在光亮鍍鋅層上電鍍沉積出 ~ 11 ** 200842209 光亮的代鉻鍍層。 又’欲解決在鋅層上雷 層的關鍵問題，主要Η X ' 〃 '辛或錫一銘代鉻鍍 潛之前，對辞鑛層行電錢錫一姑—辞或錫一㈣ 置換型去霧拋光溶液出光二霧抱光處理，採用 這種鑛層結構盘塗心先嗔鉻鑛層。 罩、超市貨架、自行車裳株“… 用於電風扇網 不但裝飾性外觀好、防腐榀口 幻五孟零件， (大幅下降。 防篇儀性好，而且能使電鑛生產成本 經由以上說明，可知本發明鑛層體 鍍鋅層表面，增加了餛„ 、 疋在吊規 〜鈷一鋅或錫一鈷合金代鉻鍍層， 而根據本發明鍍層料項的核心収解 :或錫-繼錄層之前，對辞鑛層進行有效的L = 務抛先處理，錢辞後用傳統卜2 %的淡硝酸溶液出光， 在其上鑛錫—録—辞或錫—銘合金代絡鑛層，鑛層要是發 化、發務，是得不到光亮鐘層的，所以本發明採用置換: 霧拋光劑出光’將可獲得滿意的不發花、發霧的光亮表面 ，能達到滿意的處理效果。 例1 : 光凴氯化鉀鍍鋅（鍍層厚度要求在8 以上）〜、、主 洗-置換去霧出光劑！ 〇 〇m 1/L，溫度室溫，時^ 0 s，經自來水清洗，立即電鍍錫一鈷一鋅或錫一鈷合金 代鉻鍍層，所獲得的鍍層光亮不發霧，但光亮度稍差。 例 2 ·· ° 光亮氯化鉀鍍鋅（鍍層厚度要求在8 //m以上）〜、、主 -12- 200842209 ^置換去霧出光劑15()則八，溫度室溫，時間丄 f s，經自來水清洗’立即電鍍錫—鈷_鋅或錫一鈷合金 鍍層’所獲得的鍍層光亮不發霧，鑛層光亮度好。 例J · 光亮氯化鉀鐘辞（鑛層厚度要求在“m以上）—清 洗—置換去霧出来密jf p n n 務出光^ 0 0 m 1 / L，溫度室溫，時間i 〇 S，您自來水清洗，立 外屯鍍錫一鈷一鋅或錫一鈷合金 代鉻鑛層’所獲得的鍍層光亮不發霧，鑛層光亮度好。 例4 : ( 《亮氯化鉀鑛鋅（鑛層厚度要求在8 _以上）—清 洗—置換去霧出光劑2 5 n n ^ ^ 5 0 m 1八，溫度室溫，時間工 0 s 、纟i自來水清洗，立即雷輕總 Μ ^ 卩電鍍錫一鈷一鋅或錫一鈷合金 口、X曰所獲知的鍍層光亮，但隱約有點發霧。 總結以上說明，可知女 ^ /ϋ, 本I月在解決以鍍鋅代替鍍鎳鉻 鐘層的衣備工藝上、ηχ^卩义电各 在傳、、先防護性鑛鋅層上施鑛一層里 有鑛鉻層裝飾外觀的卩六1 ρ 〃 一 m: 錫基合金光亮鍍層，使其能在 疋吏用條件下取代防護裝飾性鎳/鉻或 體系，達節約錄、絡金屬資源、顯著降低生產成本^ %境保護和實現電鑛清潔生產之目的，整體而言，確h 有極佳之產業利用價值’爰依法提出專利申請。只、 【圖式簡單說明】 無 申請專利範園： 種以錢鋅代替鍍鎳鉻鍍層的製備工藝， -13-2 0 〜4 5 °C 0· 5 〜1. 5A/dm2 3 〜5 mi η 0 · 5~1 . 5 micron tin plate / graphite electro-tin-tin-cobalt bright clock layer formula and process conditions • Potassium pyrophosphate 2 4 0 2 8 0 g / L Stannous chloride 3 0 3 5 g / L Chlorination drill 8 1 2 g / L Chromium stabilizer 2 0 r^/ 4 0 m 1 / L Chromium additive 2 0 3 0 m 1 / L temperature 2 0 4 5 °C cathode current density 0 5 1 5 A /dm 200842209 plating time plating thickness anode 3 ~ 5 min 〇 · 5~1 · 5 micron tin plate / graphite as described above for the first preparation process The plated tongue is treated with a satin-tungsten-cobalt-zinc or tin-cobalt light 7C coating surface passivation treatment, and then passivated - the disadvantage is that · · β wash - dry no method, 1, the chromate purification solution is toxic and harmful; 2 The coating is easy to change color and wear resistance. Therefore, if passivation treatment is used, the formulation and process of low chromium passivation: 5ml/L, the temperature is room temperature, after passivation, it is washed and dried. , should be treated with low chromium passivation, its sodium dichromate 5 g / L, acetic acid 3 ~ passivation time 0 · 5 ~ lmin, the preparation process of the younger brother J in the iron ore - Ming - zinc or tin - Ming chrome The method of applying the lacquer layer on the surface of the coating has the following advantages: 1. The appearance of the coating can be kept bright for a long time; 2. The corrosion resistance and wear resistance of the coating can be further improved; 3. After the plating, no passivation treatment is required, and the coating can be completely discarded. Harmful hexavalent chromium. ^The type of varnish can be selected according to the needs of the product, combined with the drying index of the paint, the hardness of the film and the color retention, etc., and selected for more environmental considerations, such as the product requirements are not too high, In particular, the small 7 pieces can also be coated with water-soluble varnish. Before applying the water-soluble varnish, the parts do not need to be dried after cleaning, but the last cleaning is required to use deionized water. The appearance of the coating obtained by the present invention is comparable to that of the decorative decorative bright nickel/complex [200842209 = very good to achieve fL degree] compared to the same nickel/chromium coating with anti-clearing energy below 1 〇 micron. , _ _, over nickel / chrome plating, this is because the coating system is the relationship of the anode, the anodic coating is to protect the substrate by the sacrifice of the coating Jinde X rot 1 worm 'only when the ore layer is completely rotted, the substrate The metal began to work on the potential of the nickel chrome plating, which is the positive potential of the base iron. It belongs to the yin layer. The cathodic coating on the base metal is a mechanical auxiliaries coated on the surface of the base metal to make the iron metal and Atmospheric insulation, because the nickel-chromium clock layer itself has excellent anti-corrosion record, so that although the iron-based - free corrosion, but the 32 polar money layer is thinner in its clock layer, it is often porous steep / wet The air can pass through the pores of the coating to reach the iron matrix, so that the iron is recorded from below the nickel-chromium coating, and gradually expands from the pores to the inside. The plating often has rust spots. See, for a long time, sometimes by the surface. Look can go back, but the coating can peel Down, after the coating is peeled off, it can be seen that the iron inside has been rusted very seriously, so the cathode ore layer is only reached in the money layer: the thickness of the temple (such as the nickel plating layer required to reach 20 microns or more), the plating layer b / there are pores ' will have better corrosion resistance, but the anode plating layer will not occur the above phenomenon, only when the coating is completely corroded, the matrix iron will be recorded. In the traditional process, the galvanized layer is not plated with other coatings, and it is considered that it is not coated with other coatings. This is because the words are amphoteric metals, and under acidic and alkaline conditions, zinc will corrode, while tin Cobalt-zinc or tin-cobalt-chromium plating is a pyrophosphate plating solution, which is weakly alkaline, does not corrode the zinc coating in a short time, and the appearance of the two coatings is close to that of the chrome plating. It is inferred that the two coatings are capable of electroplating on the bright galvanized layer to deposit a bright chrome plating of ~ 11 ** 200842209. Also, 'I want to solve the key problem of the thunder layer on the zinc layer, mainly Η X ' 〃 'Xin or Tin Yi Ming chrome plating potential, before the remarks of the remarks of the money, Qianxi, aunt, or Xiyi (four) replacement type The mist polishing solution is treated with light and fog, and the core layer is coated with a chrome ore layer. Covers, supermarket shelves, bicycles and skirts... "For electric fan nets, not only decorative appearance, anti-corrosion, but also five parts, (substantial decline. Anti-theft instrument is good, and can make the cost of electricity production through the above instructions, It can be seen that the surface of the galvanized layer of the ore body of the present invention is increased by 馄 , 疋 吊 〜 钴 钴 cobalt-zinc or tin-cobalt alloy chrome plating, and the core collection of the coating material according to the invention: or tin - succession Before the layer, the effective layer of the remarking layer is treated as L = first, and after the money is resigned, it is lighted out with a traditional 2% nitric acid solution, on which the tin-recording or the tin-ming alloy is used. If the ore layer is hairline and hairline, it will not get a bright clock layer, so the invention adopts the replacement: the mist polishing agent will produce a satisfactory bright surface without blooming and fogging, and can achieve satisfactory treatment effect. Example 1: Light bismuth potassium chloride galvanizing (coating thickness required to be 8 or more) ~,, main wash-displacement defogging light agent! 〇〇m 1/L, temperature room temperature, time ^ 0 s, cleaned by tap water Immediately electroplating tin-cobalt-zinc or tin-cobalt alloy chrome plating The obtained coating is bright and not foggy, but the brightness is slightly poor. Example 2 ·· ° Bright potassium chloride galvanizing (coating thickness required to be 8 // m or more) ~,, main-12- 200842209 ^ Replacement defogging light agent 15 () then eight, temperature room temperature, time 丄 fs, cleaned by tap water 'immediate plating of tin-cobalt_zinc or tin-cobalt alloy coating' obtained by the coating is bright and does not fog, the mineral layer brightness is good. Example J · Bright potassium chloride clock (mineral thickness required to be above m) - cleaning - replacement defogging out jf pnn business light ^ 0 0 m 1 / L, temperature room temperature, time i 〇S, your tap water cleaning, stand The coating obtained by tin-plating a cobalt-zinc or tin-cobalt alloy chrome ore layer is bright and does not fog, and the brightness of the ore layer is good. Example 4: (" Bright potassium chloride ore (the thickness of the ore layer is required) 8 _ or more) - cleaning - replacement defogging light agent 2 5 nn ^ ^ 5 0 m 1 eight, temperature room temperature, time 0 s, 纟i tap water cleaning, immediately thunder light total Μ ^ 卩 electroplating tin-cobalt-zinc Or the tin-cobalt alloy port, the X-ray is known to be bright, but it is slightly foggy. Summarizing the above description, you can know the female ^ /ϋ, In the first month of this year, in the process of preparing the galvanizing instead of the nickel-plated chrome-plated clock layer, the ηχ^卩yi electric power is transmitted, and the first protective mineral zinc layer is applied to the first layer. 1 ρ 〃 a m: tin-based alloy bright coating, which can replace the protective decorative nickel/chromium or system under the conditions of use, saving the recording and metal resources, significantly reducing the production cost. The purpose of mine clean production, on the whole, is that there is an excellent industrial use value. 'Public patent application according to law. Only, [Simple description] No patent application garden: Kind of zinc instead of nickel-plated chromium plating Preparation process, -13-