Methylene chloride phosphatizing

Details Methylene chloride phosphatizing Methylene chloride phosphatizing

1976-06-07

1978-02-14

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 36, 148 615R, 148 315, 252372, C23F 708

Patent

active

040730662

ABSTRACT:
A liquid composition, containing methylene chloride, can provide phosphate coatings on metal articles. In addition to the methylene chloride, the composition contains a phosphatizing proportion of phosphoric acid and a solubilizing solvent capable of solubilizing phosphoric acid in methylene chloride. Most critically, the composition contains water in an amount exceeding the proportion of phosphoric acid, yet, the water-containing liquid composition maintains liquid phase homogeneity. Phosphatized coatings of desirable water insolubility are thereby obtained.

REFERENCES:
patent: 2992146 (1961-07-01), Low
patent: 3100728 (1963-08-01), Vullo
patent: 3306785 (1967-02-01), Hitchcock

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