| 摘要 |
A coating of the inorganic zinc type which has, among other uses, excellent performance in the cathodic protection of metal from corrosion, especially when exposed to hot water. The coating is composed of mixture of zinc dust, extremely fine, high purity aluminum, sodium aluminum silicate and red iron oxide or titanium dioxide. Clay may be added for flow control and/or thixotrophy. The powder mixture is mixed with an alcoholic solution of partially hydrolyzed ethyl silicate liquid to form a slurry, and the slurry is thereafter sprayed or otherwise applied to a metal substrate to provide a coating having a thickness of 2 to 10 mils. Drying of the coating acts to evaporate the alcohol, and exposure to atmospheric humidity will fully hydrolyze the ethyl silicate to produce a dense, hard, tightly adherent coating which provides excellent corrosion resistance in a hot water environment.
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