Methylene chloride phosphatizing

Details Methylene chloride phosphatizing Methylene chloride phosphatizing

C - Chemistry, Metallurgy

23

C

148/17, 148/24

C23C 22/03 (2006.01)

Patent

CA 1066998

Abstract of the Disclosure 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 phosphonic 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. Phospha- tized cou?tings of desirable water insolubilty are thereby obtained.

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