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Treatment solution to form a chemical coating of trivalent chromium black on zinc or zinc alloy and method of forming the trivalent chromium chemical coating on zinc black or zinc alloy
Treatment solution to form a chemical coating of trivalent chromium black on zinc or zinc alloy and method of forming the trivalent chromium chemical coating on zinc black or zinc alloy
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机译：在锌或锌合金上形成三价铬黑化学涂层的处理溶液以及在锌黑或锌合金上形成三价铬化学涂层的方法
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摘要
A treatment solution to form a coating film of black trivalent chromium chemical conversion on zinc or zinc alloy, the solution comprising: a trivalent chromium ion; a chelating agent capable of forming a water soluble complex with the trivalent chromium ion; a zinc ion; an organic sulfur compound; and a phosphite ion, wherein a concentration of zinc C ions (mol / l) ion concentration of trivalent chromium A (mol / l), and a concentration of the sulfur compound D (mol / l) in the solution treatment, they are in the range represented by the following expression (1) 0,0431C + a / 4 = D = 0,0431C + a / 50
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机译：在锌或锌合金上形成黑色三价铬化学转化的涂膜的处理溶液，该溶液包含：三价铬离子;和能够与三价铬离子形成水溶性络合物的螯合剂;锌离子;有机硫化合物;和亚磷酸根离子，其中在固溶处理中的三价铬A的锌C离子浓度（mol / l）（mol / l）和硫离子化合物D的浓度（mol / l）在下式（1）表示的范围0,0431C + a / 4> = D> = 0,0431C + a / 50
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