| 摘要 |
The rustproof coating compositions contain alkyl orthosilicate or alkali metal silicate and powder Zn as main components, and finely powder Al2O3 or TiO2 of average particle diameter 5-40μ and surface area 30-120 m2/g in 0.05-1.0 part /100 parts Zn powder. Thus, a steel plate was sand-blasted, spray-coated with a mixture of powder Zn 100, fine Al2O3 powder 0.05, and a hydrolyzed Et silicate solution 43 parts at 50μ thickness and kept at 20oC and 75% relative humidity for 7 days. when the steel plate was immersed in 3% NaCl for 90 days, no rusting was obtained.
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