COMPOSITION FOR TREATING SURFACE OF METAL, METHOD FOR TREATING SURFACE OF METAL USING THE COMPOSITION, AND COATING FILM FOR TREATING SURFACE OF METAL UTILIZING THE COMPOSITION AND THE METHOD
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United States of America Patent
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Issued Date -
Dec 22, 2011
app pub date -
Feb 17, 2010
filing date -
Mar 2, 2009
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Abandoned
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Abstract
A composition for metal surface treatment capable of forming films and imparting excellent corrosion resistance in relation to metallic materials, in particular, metal formations having complex shapes through a single dipping step. A composition for metal surface treatment contains 5 to 30% by weight of a nonionic and/or cationic water-based resin, 100 to 1,000 ppm of trivalent Bi ions and an aminopolycarboxylic acid at 0.5 to 10 times in molar concentration based on the Bi ions.
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