Method for anticorrosive treatment of galvanized steel
    13.
    发明授权
    Method for anticorrosive treatment of galvanized steel 失效
    镀锌钢板防腐处理方法

    公开(公告)号:US4385940A

    公开(公告)日:1983-05-31

    申请号:US224480

    申请日:1981-01-12

    CPC classification number: C23C22/46 C23C22/40 C23C22/42

    Abstract: An anticorrosive treatment for preventing white rust on galvanized steels, comprises applying to the surface of a galvanized steel sheet an acidic solution containing molybdic acid or a molybdate in a concentration of 10-200 g/l calculated as molybdenum and adjusted to a pH value of 1-6 by addition of an organic or inorganic acid.

    Abstract translation: 一种用于防止镀锌钢板白锈的防腐蚀处理方法,其特征在于,在镀锌钢板的表面上,以钼计算浓度为10〜200g / l的钼酸或钼酸盐的酸性溶液,调整为pH值 1-6,通过加入有机或无机酸。

    Method for nickel-free phosphating metal surfaces

    公开(公告)号:US10738383B2

    公开(公告)日:2020-08-11

    申请号:US15562970

    申请日:2016-04-07

    Applicant: Chemetall GmbH

    Abstract: Described herein is a method for substantially nickel-free phosphating of a metallic surface, wherein a metallic surface, optionally after cleaning and/or activation, is first treated with an acidic aqueous phosphating composition that includes zinc ions, manganese ions, and phosphate ions, and is optionally rinsed and/or dried, and is thereafter treated with an aqueous after-rinse composition that includes at least one kind of metal ion selected from the group consisting of the ions of molybdenum, copper, silver, gold, palladium, tin, antimony, titanium, zirconium, and hafnium and/or at least one polymer selected from the group consisting of the polymer classes of the polyamines, polyethyleneamines, polyanilines, polyimines, polyethyleneimines, polythiophenes, and polypryroles and also mixtures and copolymers thereof, with both the phosphating composition and the after-rinse composition being substantially nickel-free.

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