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1.发明申请公开(公告)号：US20030148122A1
公开(公告)日：2003-08-07
申请号：US10085083
申请日：2002-03-01
IPC分类号： B32B015/04
CPC分类号： C23C22/46 , C23C22/47 , C23C2222/10 , Y10T428/12583 , Y10T428/12792 , Y10T428/12799
摘要： A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises: trivalent chromium and oxalic acid in a molar ratio ranging from 0.5/1 to 1.5/1, wherein the trivalent chromium is present in the form of a water-soluble complex with oxalic acid; and cobalt ions, which do not form a hardly soluble metal salt with oxalic acid and are stably present in the processing solution without causing any precipitation; wherein the solution reacts with zinc when bringing it into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, corrosion resistant, trivalent chromate conversion film containing zinc, chromium, cobalt, oxalic acid and silicon on the plating. The film is quite thin, free of any hexavalent chromium, has corrosion resistance identical to or higher than that achieved by the conventional hexavalent chromium-containing film and can be formed using a processing solution having a quite low concentration.
摘要翻译： 一种用于在锌或锌合金镀层上形成六价铬无铬耐腐蚀三价铬酸盐转化膜的处理溶液包括：摩尔比为0.5 / 1至1.5 / 1的三价铬和草酸，其中存在三价铬 呈草酸形式的水溶性复合物; 和钴离子，其不与草酸形成难溶的金属盐，并且稳定地存在于处理溶液中而不引起任何沉淀; 其中当与锌或锌合金镀层接触时，溶液与锌反应，以在镀层上形成含有锌，铬，钴，草酸和硅的六价铬，耐腐蚀的三价铬酸盐转化膜。 该膜相当薄，没有任何六价铬，具有与常规六价铬含量膜相同或更高的耐腐蚀性，并且可以使用浓度非常低的处理溶液形成。
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2.发明申请公开(公告)号：US20030121570A1
公开(公告)日：2003-07-03
申请号：US10085705
申请日：2002-03-01
IPC分类号： C23C022/46
CPC分类号： C23C28/3225 , C23C22/46 , C23C22/47 , C23C28/00 , C23C28/02 , C23C28/321 , C23C28/345 , C23C28/3455 , C23C2222/10 , Y10T428/12583 , Y10T428/12799 , Y10T428/31678
摘要： A processing solution for forming a hexavalent chromium free, corrosion resistant trivalent chromate conversion film on zinc or zinc alloy plating layers comprises a silicon compound; trivalent chromium and oxalic acid in a molar ratio ranging from 0.5 to 1.5, wherein the trivalent chromium is present in the form of a water-soluble complex with oxalic acid; and cobalt ions, which form a hardly soluble metal salt with oxalic acid and are stably present in the processing solution without causing any precipitation, wherein the solution reacts with zinc when bringing it into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, corrosion resistant, trivalent chromate conversion film containing zinc, chromium, cobalt, oxalic acid and silicon on the plating. This solution can provide a corrosion resistant trivalent chromate conversion film excellent in the corrosion resistance after heating.
摘要翻译： 用于在锌或锌合金镀层上形成六价铬无腐蚀的三价铬酸盐转化膜的处理溶液包括硅化合物; 三价铬和草酸的摩尔比范围为0.5至1.5，其中三价铬以与草酸的水溶性络合物的形式存在; 和钴离子，其与草酸形成难溶的金属盐，并且稳定地存在于处理溶液中而不引起任何沉淀，其中溶液与锌在与锌或锌合金镀层接触时与锌反应形成六价铬 在镀层上含有锌，铬，钴，草酸和硅的三价铬酸盐转化膜。 该溶液可以提供加热后的耐腐蚀性优异的耐腐蚀性的三价铬酸盐转化膜。
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