Essentially chromium-free method for passivating metallic surfaces consisting of zn, zn alloys, al or al alloys
    7.
    发明申请
    Essentially chromium-free method for passivating metallic surfaces consisting of zn, zn alloys, al or al alloys 失效
    用于钝化由zn,zn合金,Al或Al合金组成的金属表面的基本无铬方法

    公开(公告)号:US20070082193A1

    公开(公告)日:2007-04-12

    申请号:US10595494

    申请日:2004-10-15

    IPC分类号: B32B15/082

    摘要: The present invention relates to a substantially chromium-free process for passivating metallic surfaces of Zn, Zn alloys, Al or Al alloys by treating the surface with an acidic aqueous formulation which comprises at least one substantially noncrosslinked, water-soluble polymer or copolymer containing at least 50% by weight of (meth)acrylic acid units and comprises water or an aqueous solvent mixture comprising at least 50% by weight of water, and by further treating the surface with at least one water-soluble crosslinker comprising at least 2 crosslinking groups selected from the group consisting of azirane, oxirane, and thiirane groups. The invention further relates to passivating layers obtainable by means of the process and to a formulation suitable for this process.

    摘要翻译: 本发明涉及通过用含有至少一种基本上非交联的水溶性聚合物或共聚物的酸性含水制剂处理表面来钝化Zn,Zn合金,Al或Al合金的金属表面的基本上无铬的方法。 至少50重量%的(甲基)丙烯酸单元,并且包含水或包含至少50重量%的水的水性溶剂混合物,并且通过用至少一种包含至少2个交联基团的水溶性交联剂进一步处理该表面 选自由氮丙烷,环氧乙烷和硫杂环丁烷基组成的组。 本发明还涉及通过该方法可获得的钝化层和适用于该方法的制剂。