Metal surface treatment composition, metal surface treatment method, and galvanized steel plate
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United States of America Patent
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Issued Date -
Feb 3, 2005
app pub date -
Jul 16, 2004
filing date -
Jul 17, 2003
priority date (Note) -
Abandoned
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Abstract
It is an object of the present invention to provide a metal surface treatment composition and a metal surface treatment method superior in stability, which can apply a good chemical conversion treatment to a galvanized steel plate without requiring a burden of waste water treatment, and a galvanized steel plate superior in a rust-preventive property and adhesion, which is obtained by such a metal surface treatment method. A metal surface treatment composition comprising niobium oxide colloidal particles, wherein the niobium oxide colloidal particles are derived from a niobium oxide sol which is stabilized by containing citric acid or salts thereof in an amount of 0.02 to 1.0 by a mole ratio relative to Nb.
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