Method and agent for chemical conversion treatment and chemically conversion-Treated members
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United States of America Patent
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Issued Date -
Apr 9, 2009
app pub date -
Jun 23, 2006
filing date -
Jul 1, 2005
priority date (Note) -
Abandoned
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Abstract
A method is provided for chemical conversion treatment by which a chemical conversion layer attaining satisfactory substrate-covering properties, adhesion to coating and corrosion resistance can be formed on any metal structure surface. More specifically, a method for chemical conversion treatment is provided by treating a metal structure with an agent for chemical conversion treatment, in which the agent contains zirconium, fluorine, an amino-containing alkoxysilane, and a hydroxyl-containing alkoxysilane with the contents of zirconium and the amino-containing alkoxysilane being 100 to 700 ppm in terms of metal and 50 to 500 ppm in terms of solid matter respectively at a fluorine/zirconium molar ratio of 3.5 to 7.0 and has a pH of 2.8 to 4.5.
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