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US 5,209,788 AGranted
Non-chrome final rinse for phosphated metal
AssigneePPG Industries, Inc.
InventorsMark W. McMillen, F. Leon Bergeron
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Abstract
This application relates to a water-based passivating composition comprising: (a) an amino compound which is selected from the group consisting of an amino acid and salts thereof and an amino alcohol and salt thereof, and (b) a metal compound selected from a group IIIB transition metal compound, a group IVB transition metal compound and a rare earth metal compound.
Claims9
A process for treating a phosphated metal surface comprising contacting said phosphated metal surface with a water-based composition comprising:
- (a) an amino compound present at a level about 50 to 100,000 parts per million, which is an amino acid or an amino alcohol, said amino acid being selected from the group consisting of glycine, sarcosine, iminodiacetic acid, leucine, tyrosine, taurine, N-methyl taurine, aminobenzoic acid, gamma-aminobutyric acid and salts thereof;
- said amino alcohol being selected from the group consisting of imidazoline, oleyl imidazoline, choline, triethanolamine, diethanol glycine, ethanol diglycine, 2-amino-2-ethyl-1,3-propanol and amino-propanol;
- and
- (b) a group IVB metal compound.
1 more element
Dependencies are inferred from the claim text.