Process for manufacturing zinc-silica composite plated steel
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United States of America Patent
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Apr 7, 1987
Grant Date -
N/A
app pub date -
Dec 13, 1985
filing date -
Dec 15, 1984
priority date (Note) -
Expired
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Abstract
A process for manufacturing zinc-silica composite plated steel performed by electrolyzation in a galvanization bath containing fine grains of silica, particularly colloidal silica fine particles. Surfactant having cationic property, such as polyoxyethylenelaurylamine or dodecyltrimethylammonium chloride is further added to the galavinization bath so that a zinc-silica layer is formed over the steel. The plated steel surfaces are further treated with a silane coupling agent, such as gamma-aminopropyltriethoxysilane. The steel plated with zinc-silica composite thus obtained has excellent resistance against corrosion and adhesion to organic paints or organic adhesives. The steel is suitable for various steel members and sheet iron for automobile bodies and parts which require high corrosion resistance.
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