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首页> 外文期刊>Corrosion Engineering, Science and Technology >Localised corrosion of heat treated alloys. Part 1 - repassivation potential of alloy 600 as function of solution chemistry and thermal aging
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Localised corrosion of heat treated alloys. Part 1 - repassivation potential of alloy 600 as function of solution chemistry and thermal aging

机译：热处理合金的局部腐蚀。第1部分-合金600的再钝化电位与溶液化学性质和热时效的关系

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摘要

The crevice repassivation potential E_(rcrev) of alloy 600 was measured as a function of chloride concentration, inhibitor concentration, temperature and degree of sensitisation (DOS) due to thermal aging. Electrochemical potentiokinetic reactivation tests were performed on thermally aged alloy 600 to correlate the DOS with E_(rcrev) results. The electrochemical potentiokinetic reactivation results agreed well with the literature, and differed in the apparent sensitisation kinetics from E_(rcrev). The crevice repassivation potential was found to be inversely related to test temperature, chloride concentration, and DOS due to thermally aging the material. Additions of nitrate were found to significantly elevate the repassivation potential of both annealed and sensitised material. The results form the basis for establishing a model to predict the occurrence of localised corrosion for in service, real world materials used in the processing industry.
机译：测量合金600的缝隙再钝化电势E_（rcrev）与氯化物浓度，抑制剂浓度，温度和热老化引起的敏化度（DOS）的关系。对热时效合金600进行了电化学电位动力学再活化测试，以使DOS与E_（rcrev）结果相关。电化学电位动力学再活化结果与文献一致，并且在表观敏化动力学方面与E_（rcrev）不同。由于材料的热老化，发现缝隙的再钝化电位与测试温度，氯化物浓度和DOS成反比。发现添加硝酸盐可显着提高退火材料和敏化材料的再钝化潜能。这些结果构成了建立模型的基础，该模型可以预测加工行业中使用的实际材料的局部腐蚀的发生。

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