Test method for phosphate coatings

Details Test method for phosphate coatings Test method for phosphate coatings

1984-06-20

1985-08-06

Turk, Arnold

Chemistry: analytical and immunological testing

Process or composition for determination of physical state...

436 5, 436 81, 436 84, 436103, 436175, G01N 100, G01N 3320

Patent

active

045336393

ABSTRACT:
A method for determining the coating weight and composition of a zinc phosphate coating on a ferrous metal surface comprises stripping the coating from a known area using an aqueous solution of sodium hydroxide and triethanolamine, thereafter measuring the iron and phosphate contents by colorimetric analysis of the stripping solution and then determining the coating weight and composition based on such measurements.

REFERENCES:
patent: 3615825 (1971-10-01), Gansser
patent: 3671447 (1972-06-01), Kowalski

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