Zinc phosphate-containing surface conditioning agent phosphate conversion-treated steel plate and painted steel plate, and zinc phosphate dispersion
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United States of America Patent
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Issued Date -
Jan 22, 2004
app pub date -
Jun 12, 2003
filing date -
Jun 13, 2002
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Abandoned
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Abstract
A zinc phosphate-containing surface conditioning agent to be used for surface conditioning as pretreatment for zinc phosphate conversion coating of a metallic material, which contains from 500 to 20,000 ppm of zinc phosphate and which has a pH of from 3 to 11, wherein said zinc phosphate has an average particle size of at most 3 .mu.m and D.sub.90 of at most 4 .mu.m.
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