Corrosion Behavior of Stainless and Carbon Steels in High Temperature and Pressure Water Systems with Addition of Zr and Si Compounds
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概要
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The corrosion behavior of stainless and carbon steels in high temperature and high pressure (HT/HP) water systems with addition of Zr and Si compounds was investigated. The corrosion of stainless and carbon steels was inhibited by addition of a Zr compound. This is due to formation of a stable film by Zr oxide and then the increase of protective ability of the film. Only corrosion of stainless steel was depressed by addition of a Si compound. It is thought that this is owing to depression of outer-diffusion and dissolution of CrO<SUB>4</SUB><SUP>2-</SUP> by adsorption of SiO<SUB>3</SUB><SUP>2-</SUP> on a steel surface and then stabilization of the film containing a Cr component.
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