초록 ▼

Method and composition for applying a coating to a metallic surface, the surface being immersed in an acidic aqueous coating composition comprising dispersed solid particles of an organic polymeric resinous coating-forming material and an oxidizing agent, wherein the weight or thickness of the coati

Method and composition for applying a coating to a metallic surface, the surface being immersed in an acidic aqueous coating composition comprising dispersed solid particles of an organic polymeric resinous coating-forming material and an oxidizing agent, wherein the weight or thickness of the coating formed on the surface is a function of the time the surface is immersed in the composition.

대표청구항 ▼

An acidic aqueous coating composition having a pH of about 1.6 to about 3.8 for use in coating a ferriferous surface comprising an acidic aqueous solution of at least about 0.01 oxidizing equivalent/liter of an oxidizing agent which contains oxygen and which has a positive reduction potential greate

An acidic aqueous coating composition having a pH of about 1.6 to about 3.8 for use in coating a ferriferous surface comprising an acidic aqueous solution of at least about 0.01 oxidizing equivalent/liter of an oxidizing agent which contains oxygen and which has a positive reduction potential greater than that of hydrogen, and about 5 to about 550 g/l of solid particles of a coating-forming polymeric resinous material dispersed throughout the composition, said composition being effective to chemically attack, in the absence of an external electrical potential, a ferriferous surface immersed therein to dissolve therefrom metal in an amount of at least about 25 to about 60 mg/sq. ft. within the first minute of immersion to release ions of said metal and sufficient to cause said resinous material to deposit on said ferriferous surface in the form of an initially adherent coating which increases in weight or thickness the longer the time said surface is immersed in said composition.