METHOD FOR TREATING SURFACE OF ZINC-ALUMINUM-MAGNESIUM ALLOY-PLATED STEEL SHEET
    1.
    发明公开
    METHOD FOR TREATING SURFACE OF ZINC-ALUMINUM-MAGNESIUM ALLOY-PLATED STEEL SHEET 有权
    VERFAHREN ZUROBERFLÄCHENBEHANDLUNGVON MIT EINER ZINK-ALUMINUM-MAGNESIUM-LEGIERUNG BESCHICHTETEM STAHLBLECH

    公开(公告)号:EP3075879A4

    公开(公告)日:2017-08-16

    申请号:EP14866659

    申请日:2014-11-28

    摘要: Provided is a method for obtaining a chemical conversion coating-treated zinc-aluminum-magnesium alloy-plated steel sheet having extremely excellent in corrosion resistance and adhesiveness to a resin coating film. The method is for treating the surface of a zinc-aluminum-magnesium alloy-plated steel sheet with a metal surface treatment agent, in which the metal surface treatment agent contains a compound (A) having a zirconyl ([Zr=O] 2+ ) structure, a vanadium compound (B), a titanium fluorocomplex compound (C), an organic phosphorus compound (Da) containing a phosphoric acid group and/or a phosphonic acid group, an inorganic phosphorus compound (Db), a specific aqueous acrylic resin (E), and an oxazoline group-containing polymer (F) as a curing agent, each in a predetermined amount, and the pH of the metal surface treatment agent is 3 to 6.

    摘要翻译: 本发明提供一种获得耐腐蚀性和对树脂涂膜的密合性非常优异的化学转化处理被膜处理锌 - 铝 - 镁合金电镀钢板的方法。 该方法是用金属表面处理剂处理镀锌 - 镁 - 镁合金钢板的表面,其中金属表面处理剂含有具有氧化锆([Zr = O] 2+)的化合物(A) )结构,钒化合物(B),钛氟化物化合物(C),含有磷酸基和/或膦酸基的有机磷化合物(Da),无机磷化合物(Db),特定的含水丙烯酸 树脂(E)和含有恶唑啉基的聚合物(F)作为固化剂,各自以规定量混合,金属表面处理剂的pH为3〜6。