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Metal alloy coating for mitigation of stress corrosion cracking of metal components in high-temperature water
Metal alloy coating for mitigation of stress corrosion cracking of metal components in high-temperature water
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机译:用于减轻高温水中金属部件的应力腐蚀开裂的金属合金涂层
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摘要
A method for mitigating crack initiation and propagation on the surface of metal components in a water-cooled nuclear reactor. A metal coating having an electrically insulating outer layer is applied on the surfaces of IGSCC-susceptible reactor components. The preferred metal coating is a zirconium alloy with a zirconia outer layer. The presence of an electrically insulating layer on the surface of the metal components shifts the corrosion potential in the negative direction without the addition of hydrogen and in the absence of a noble metal catalyst. Corrosion potentials-0.5 V.sub.SHE can be achieved even at high oxidant concentrations and in the absence of hydrogen.
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机译:一种减轻水冷核反应堆中金属部件表面裂纹萌生和扩展的方法。将具有电绝缘外层的金属涂层施加在易IGSCC的反应堆组件表面上。优选的金属涂层是具有氧化锆外层的锆合金。在金属成分的表面上存在电绝缘层在不添加氢且在不存在贵金属催化剂的情况下使腐蚀电位向负方向移动。即使在高氧化剂浓度和没有氢气的情况下,也可以达到0.5 V SHE的腐蚀电位。
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