Non-flammable solvent phosphatizing compositions yielding non water soluble coatings

摘要

A liquid phosphatizing composition, containing organic solvent such as 1,1,1-trichlorethane or trichlorofluoromethane, can provide phosphate coatings on metal articles. In addition to the organic solvent, the composition contains a phosphatizing proportion of phosphoric acid and a solubilizing liquid capable of solubilizing phosphoric acid in the organic solvent. The composition contains a minor amount of water, yet it is an amount exceeding the proportion of phosphoric acid, and the composition is non-flammable. Phosphatized coatings of desirable water insolubility are obtained.