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    Aqueous dip-coating composition for electroconductive substrates, comprising both dissolved and undissolved bismuth
    1.
    发明授权
    Aqueous dip-coating composition for electroconductive substrates, comprising both dissolved and undissolved bismuth 有权

    公开(公告)号：US10407578B2

    公开(公告)日：2019-09-10

    申请号：US15037362

    申请日：2013-11-18

    申请人： BASF Coatings GmbH ,  HENKEL AG & Co. KGaA

    发明人： Franz-Adolf Czika ,  Klaus Lepa ,  Kristof Wapner

    IPC分类号： C09D5/44 ,  C25D13/18 ,  C25D13/10 ,  C09D5/08 ,  C25D13/12

    摘要： The present invention relates to an aqueous coating composition (A) having a pH in a range from 4.0 to 6.5 and comprising at least one cathodically depositable binder (A1), a total amount of at least 130 ppm of Bi, based on the total weight of (A), including at least 30 ppm of Bi in a form (A3) in solution in (A) and at least 100 ppm of Bi in a form not in solution in (A), and at least one at least bidentate complexing agent (A5) suitable for complexing Bi, (A5) being present in (A) in a fraction of at least 5 mol %, based on the total amount of the Bi present in (A), for at least partly coating an electrically conductive substrate with an electrocoat material, to a method for producing (A), to the use of (A) for at least partly coating an electrically conductive substrate with an electrocoat material, to a corresponding coating method, to an at least partly coated substrate obtainable by this method, and to a method for setting and/or maintaining the concentration of component (A3) and/or (A4) in the coating composition (A) during the coating method.

    Wet on Wet Method and Chrome-Free Acidic Solution for the Corrosion Control Treatment of Steel Surfaces
    2.
    发明申请
    Wet on Wet Method and Chrome-Free Acidic Solution for the Corrosion Control Treatment of Steel Surfaces 审中-公开
    湿法湿法和无铬酸性溶液用于钢表面的腐蚀控制处理

    公开(公告)号：US20160201199A1

    公开(公告)日：2016-07-14

    申请号：US14988255

    申请日：2016-01-05

    申请人： Henkel AG & Co. KGaA

    发明人： Stefan Frey ,  Jens Krömer ,  Silvia Hohagen ,  Sophie Cornen ,  Patrick Droniou ,  Peter Kuhm ,  Franz-Adolf Czika

    IPC分类号： C23C22/34 ,  C23C22/83 ,  C25D5/36 ,  C23C22/73

    CPC分类号： C23C22/34 ,  B05D1/007 ,  B05D7/14 ,  B05D7/51 ,  C09D5/44 ,  C09D5/4488 ,  C23C22/368 ,  C23C22/44 ,  C23C22/73 ,  C23C22/83 ,  C25D5/36 ,  C25D13/20

    摘要： A process for anticorrosion treatment of bare metal surfaces comprising steel surfaces, comprising contacting the bare metal surfaces with an acidic aqueous solution of a fluoro complex of at least one element M selected from the group B, Si, Ti, Zr and Hf, at least one further component selected from among: a buffer system for the pH range from 2.5 to 5.5, nitrate ions, copper ions, silver ions, vanadium or vanadate ions, bismuth ions, magnesium ions, zinc ions, manganese ions, cobalt ions, nickel ions, tin ions, aromatic carboxylic acids with at least two groups containing donor atoms, or derivatives of such carboxylic acids, and silica particles with an average particle size of below 1 μm; and contains no more than 1 mg/l of an organic polymer with allylamine or vinylamine monomers; then rinsing the metal surfaces with water and thereafter coating them with a cathodically depositable electro-dipcoating.

    摘要翻译： 包括钢表面的裸露金属表面的防腐蚀处理方法，包括使裸露金属表面与至少一种选自B，Si，Ti，Zr和Hf的至少一种元素M的氟络合物的酸性水溶液接触，至少 选自以下的另一组分：pH范围为2.5至5.5的缓冲系统，硝酸根离子，铜离子，银离子，钒或钒酸根离子，铋离子，镁离子，锌离子，锰离子，钴离子，镍离子 ，锡离子，具有至少两个含有供体原子的芳族羧酸或这些羧酸的衍生物，以及平均粒径小于1μm的二氧化硅颗粒; 并且含有不超过1mg / l的具有烯丙胺或乙烯胺单体的有机聚合物; 然后用水冲洗金属表面，然后用阴极沉积的电泳涂层涂覆它们。