发明名称 |
Novel electrolytes for electrochemically treated metal plates |
摘要 |
According to the invention there is provided an electrochemical process for applying a firmly bonded insoluble metal oxide-organic complex on a metal surface by employing the metal as anode and a water-soluble polybasic organic acid as electrolyte. The polybasic acid may be a polyphosphonic acid, polyphosphoric and polycarboxyl acid, or polysulfonic acid and is advantageously polymeric. Polyvinyl phosphonic acid (PVPA) is a preferred electrolyte. Repetitive cycle pulsed direct current is used. The insoluble metal oxide-organic complex formed is composed of anodic oxide combined with polyacid, which forms a protective layer on the metal of improved corrosion resistance. The metal oxide-organic complex is well-suited to bond light sensitive coatings thereto. The metal may be steel, aluminum or magnesium.
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申请公布号 |
US4399021(A) |
申请公布日期 |
1983.08.16 |
申请号 |
US19820359457 |
申请日期 |
1982.03.18 |
申请人 |
AMERICAN HOECHST CORPORATION |
发明人 |
GILLICH, THOMAS N.;WALLS, JOHN E.;WANAT, STANLEY F.;ROZELL, WILLIAM J. |
分类号 |
B41N3/03;C25D11/06;C25D11/12;(IPC1-7):C25D11/10;C25D11/24 |
主分类号 |
B41N3/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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