Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1990-06-26
1992-05-12
Woo, Jay H.
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
4273882, 4273884, 427409, 106 1411, 524543, 524547, 524551, 524555, C23C 2205
Patent
active
051124130
ABSTRACT:
Methods for treating metal surfaces including contacting the surface with a water soluble or water dispersible polymer comprising a repeat unit (a) having the structure ##STR1## or salt form of said repeat unit, wherein R and R.sub.1 are the same or different and are independently chosen from C.sub.1 -C.sub.3 lower alkylene and wherein z is an integer of from 1-3. The methods also include use of copolymers having in addition to repeat unit (a) above, a repeat unit (b) having the structure ##STR2## from wherein X is OH, NH.sub.2, or OM wherein M is a cation, the molar ration of (a.sub.1):(b) being present in said copolymer being from about 20:1 to 1:20. The methods provide chromium free rinse solutions for use in rinsing phosphate-based conversion coated metal surfaces.
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Carey William S.
Chen Fu
Reichgott David W.
Betz Laboratories Inc.
Durkin II Jeremiah F.
Peacock Bruce E.
Ricci Alexander D.
Woo Jay H.
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