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    TREATING SOLUTION FOR FORMING BLACK HEXAVALENT CHROMIUM-FREE CHEMICAL COATING ON ZINC OR ZINC ALLOY PLATED SUBSTRATE, AND METHOD FOR FORMING BLACK HEXAVALENT CHROMIUM-FREE CHEMICAL COATING ON ZINC OR ZINC ALLOY PLATED SUBSTRATE
    1.
    发明公开
    TREATING SOLUTION FOR FORMING BLACK HEXAVALENT CHROMIUM-FREE CHEMICAL COATING ON ZINC OR ZINC ALLOY PLATED SUBSTRATE, AND METHOD FOR FORMING BLACK HEXAVALENT CHROMIUM-FREE CHEMICAL COATING ON ZINC OR ZINC ALLOY PLATED SUBSTRATE 有权
    用于黑色的制造处理液，六价铬含化学涂层对锌或锌合金卷起的基材及其制造方法BLACK，六价铬含化学涂层对锌或锌合金卷起的基材

    公开(公告)号：EP1484432A1

    公开(公告)日：2004-12-08

    申请号：EP03708593.3

    申请日：2003-03-13

    申请人： Dipsol Chemicals Co., Ltd.

    发明人： INOUE, Manabu Dipsol Chemicals Co., Ltd. ,  NAKAJIMA, Ryo Dipsol Chemicals Co., Ltd. ,  WATANABE, Kazuhiro Dipsol Chemicals Co., Ltd. ,  WATANABE, Kimitaka Dipsol Chemicals Co., Ltd.

    IPC分类号： C23C22/53

    CPC分类号： C23C22/74 ,  C23C22/10 ,  C23C22/46 ,  C23C22/47 ,  C23C22/53 ,  C23C28/023 ,  C23C28/025 ,  C23C2222/10

    摘要： It is an object of the present invention to provide a processing solution used for forming a hexavalent chromium free, black conversion film, which is applied onto the surface of zinc or zinc alloy plating layers, and which has corrosion resistance identical to or higher than that achieved by the conventional hexavalent chromium-containing conversion film.
    According to an aspect of the present invention, there is provided a processing solution for forming a hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers, the processing solution comprising:

    nitrate ions and trivalent chromium in a mole ratio (NO 3- /Cr 3+ ) of less than 0.5/1, wherein the trivalent chromium is present in the form of a water-soluble complex with a chelating agent; and
    cobalt ions and / or nickel ions, wherein the cobalt ions and / or nickel ions are stably present in the processing solution without causing any precipitation by forming a hardly soluble metal salt with the chelating agent; wherein the solution reacts with zinc when it is brought into contact with the zinc or zinc alloy plating to form a hexavalent chromium free, black conversion film containing zinc, chromium, cobalt and / or nickel, and the chelating agent on the plating.

    摘要翻译： 它是本发明的一个目的是提供用于形成不含六价铬，黑转换电影的处理溶液中，所有这一切都被施加到锌或锌合金电镀层的表面上，并且其具有耐腐蚀性相同或高于 通过常规的含六价铬的转化电影实现。 。根据在本发明的一个方面，提供了一种处理溶液用于形成不含六价铬，黑转换薄膜上锌或锌合金电镀层，该处理溶液包含：硝酸根离子和三价铬的摩尔 比（NO <3 - > / Cr的<3+>）小于0.5 / 1时，三价铬的worin是存在于与螯合剂的水溶性配合物的形式; 和钴离子和/或镍离子，钴离子和worin /或镍离子在而不引起通过形成与螯合剂难溶性金属盐任何沉淀的处理溶液稳定地存在; worin溶液与锌反应当它被带入与锌或锌合金镀层接触，以形成不含六价铬，黑转换膜含锌，铬，钴和/或镍，和在镀螯合剂。