SEALING FOR ANODIZED METAL
    8.
    发明申请

    公开(公告)号:US20220127745A1

    公开(公告)日:2022-04-28

    申请号:US17077181

    申请日:2020-10-22

    摘要: A sealing process includes impregnating an oxide layer of an anodized metal with a corrosion inhibitor by contacting the oxide layer with a first corrosion inhibitor solution at a first temperature and sealing the impregnated oxide layer of an anodized metal by contacting the impregnated oxide layer with a second corrosion inhibitor solution at a second temperature, wherein the first corrosion inhibitor solution has a corrosion inhibitor concentration greater than the second corrosion inhibitor solution and the first temperature is less than the second temperature.

    METHOD FOR NI-FREE PHOSPHATIZING OF METAL SURFACES AND COMPOSITION FOR USE IN SUCH A METHOD

    公开(公告)号:US20210340676A1

    公开(公告)日:2021-11-04

    申请号:US17282665

    申请日:2019-10-08

    摘要: Described herein is a method for treatment of at least one surface of a metal containing substrate including at least contacting the surface with an aqueous acidic Ni-free composition (A) including at least zinc cations, manganese cations, and phosphate anions to form a conversion coating on the surface and contacting the formed coating with an aqueous Ni-free composition (B) including one or more linear polymers (P) containing at least vinyl phosphonic acid, (meth)acrylic acid, and hydroxyethyl- and/or hydroxypropyl (meth)acrylate in form of their polymerized monomeric units. Also described herein is the composition (B), a master batch to produce the composition (B), a kit-of-parts including both compositions (A) and (B), a kit-of-parts including respective master batches to produce both compositions (A) and (B), and a coated substrate obtainable by the method described herein.