Phosphate conversion coating and compositions and concentrates t

Details Phosphate conversion coating and compositions and concentrates t Phosphate conversion coating and compositions and concentrates t

1993-12-15

1995-01-03

Green, Anthony

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148260, 148261, 148262, 106 1412, 106 1444, C23C 2207

Patent

active

053782925

ABSTRACT:
The following water soluble materials are all satisfactory internal accelerators for otherwise conventional zinc phosphate conversion coating solutions: reducing sugars, starch, urea, and poly{acrylates and methacrylates}. Concentrates including these ingredients and otherwise conventional constituents of zinc phosphate conversion coating compositions, except for excluding conventional accelerators other than nitrate, are stable in composition during storage, unlike most conversion coating compositions containing conventional accelerators. Thus concentrates according to the invention are practical single-package concentrates that can be made into working phosphating compositions by dilution with water only.

REFERENCES:
patent: 3181976 (1965-05-01), Yager
patent: 3625777 (1971-12-01), Okabe et al.
patent: 3723334 (1973-03-01), Maurer
patent: 4824490 (1989-04-01), Oei et al.
patent: 4865653 (1989-09-01), Kramer
patent: 5000799 (1991-03-01), Miyawaki
patent: 5039361 (1991-08-01), Hauffe et al.

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