White rust prevention for zinc coated surfaces

Details White rust prevention for zinc coated surfaces White rust prevention for zinc coated surfaces

1972-06-15

1976-03-09

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Corrosion inhibiting coating composition

427404, 148 62, 252396, C09D 508

Patent

active

039429890

ABSTRACT:
A hot galvanized strip, plate or other ferrous metal workpiece is moved continuously from a cooling tower, and while at a temperature within a range of about 130.degree. to 180.degree. F. its zinc coating surfaces are subjected to the application of a white rust inhibiting master aqueous chemical treating solution. The solution forms a substantially transparent protective film on the coating surfaces that is adherent thereto. The solution contains the compounds and reaction products of two solutions as mixed together, one of which is made up of sodium dichromate dissolved in and reacted with ethylene glycol and the other of which is made of potassium dichromate dissolved in and reacted with ethylene glycol.

REFERENCES:
patent: 2434525 (1948-01-01), Thomas et al.
patent: 2559812 (1951-07-01), Watson
patent: 2768103 (1956-10-01), Schuster et al.
patent: 2911332 (1959-11-01), Schuster et al.
patent: 2991205 (1961-07-01), Lincoln et al.
patent: 3421949 (1969-01-01), Halverson
patent: 3706603 (1972-12-01), Vessey et al.

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