Corrosion and crack growth inhibiting composition for metals, a method to prevent corrosion and crack growth of metal by it, and is used for corrosion and crack growth prevention of metal, curable liquid polymer composition to the elastomer, with metal it corrosion crack growth prevention method

摘要

PURPOSE: To prevent the corrosion and crack growth of metals by applying Ce₂(MoO₄)₃ in the amt. effective for corrosion prevention on the metallic surface to be exposed to a sea water environment. ;CONSTITUTION: The Ce₂(MoO₄)₃ is applied in the amt. effective for corrosion prevention on the metallic surface of Al, etc., to be exposed to the seawater environment. At the time of this application, about 0.1 top 10wt.%, more preferably 1 to 5% Ce₂(MoO₄)₃ is used by mixing the same with the curable elastomer. The use of the Ce₂(MoO₄)₃ by mixing the same with ZnCl₂ is possible as well. As a result, the corrosion and crack growth of the metal are prevented. An equally good alternative is to compound the highly elastic and curable elastomer-like polymer with the Ce₂(MoO₄)₃ and ZnCl₂ of the amt. effective for prevention to prepare a coating or sealing compsn. for preventing the corrosion and crack growth and to use the compsn. by applying the same on the metallic surface. A polysulfide polymer, polyurethane polymer, etc., are used for the elastomer-like polymer described above. The weight ratio of the Ce₂(MoO₄)₃ and the ZnCl₂ is adequately about 0.5:2 to 2:0.5.;COPYRIGHT: (C)1991,JPO