Chromium and fluoride free metal treatment
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United States of America Patent
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May 21, 1996
Issued Date -
N/A
app pub date -
Mar 1, 1995
filing date -
Aug 16, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heavy metal and fluoride free pretreatment for a metal surface which enhances corrosion resistance and surface adhesion properties is described. The pretreatment is an aqueous solution of an anionic polyacrylamide which can be rinsed or dried in place.
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