Water based coating for roughened metal surfaces

Details Water based coating for roughened metal surfaces Water based coating for roughened metal surfaces

B - Operations, Transporting

05

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117/142, 148/17,

B05D 3/10 (2006.01) B05D 3/12 (2006.01) B05D 5/02 (2006.01) B05D 7/14 (2006.01) B05D 7/16 (2006.01) C09D 5/08 (2006.01) C23C 8/00 (2006.01) C23C 22/22 (2006.01)

Patent

CA 2016230

Abstract Calcium or other sulfonate gel in an oil carrier (such as that of U.S. 4,629,753 to Quinn), optionally mixed with a small amount of sodium sulfonate and tall oil fatty acids, can be neutralized with amine, e.g. DMEA, to form a soap which can be dispersed in water. Adding an acrylic emulsion results in an acrylic coating rich in corrosion-retarding alkali metal or alkaline earth metal sulfonates. This finish on metallurgically roughened, e.g. nitrocarburized, metal forms a firm film which can resist greater than 500 hours ASTM B117 salt spray.

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