Abstract Crevice corrosion behavior between homogeneous and dissimilar materials of 13Cr and 3.5NiCrMoV steels was investigated in simulated boiler waters containing chloride ions (Cl−) and sulfate ions (SO42−), using open circuit potential (OCP) measurements in addition to morphology analysis. Pitting occurred inside the crevice not only on 13Cr steel but also on 3.5NiCrMoV steel in the test water containing 100 ppm Cl−, while it was suppressed by the coexistence of 50 ppm SO42− in the water with the 100 ppm Cl−. However, the presence of 50 ppm SO42− in the test waters promoted uniform corrosion on 3.5NiCrMoV steel inside the crevice.

中文翻译：

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氯离子和硫酸根离子对低压汽轮机材料缝隙腐蚀行为的影响

摘要 在含有氯离子 (Cl−) 和硫酸根离子 (SO42−) 的模拟锅炉水中，除了形态分析外，还使用开路电位 (OCP) 测量研究了 13Cr 和 3.5NiCrMoV 钢的均质和异种材料之间的缝隙腐蚀行为。在含有 100 ppm Cl− 的试验水中，不仅 13Cr 钢而且 3.5NiCrMoV 钢的缝隙内都出现点蚀，而水中 50 ppm SO42− 与 100 ppm Cl− 共存可抑制点蚀。然而，测试水中 50 ppm SO42− 的存在促进了缝隙内 3.5NiCrMoV 钢的均匀腐蚀。