Abstract The purpose of this study is to evaluate the corrosion resistance of weld metal by electrochemical methods and discuss the relationship between microstructure and corrosion resistance. Intergranular and pitting corrosion resistances were measured using electrochemical potentiokinetic reactivation (EPR) test and pitting potential measurement respectively. The reactivation ratio and pitting potential corresponded to its chemical composition. The specimens containing more Cr and Mo showed higher resistance. In the EPR test, the dendrite core with a relatively low Cr content was corroded. In the pitting corrosion test, Nb carbide became the initiation site of pitting corrosion which propagated along the cell structure.

中文翻译：

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奥氏体不锈钢焊缝金属组织与局部腐蚀性能的关系

摘要 本研究的目的是通过电化学方法评价焊缝金属的耐蚀性，探讨显微组织与耐蚀性之间的关系。晶间和点蚀抗性分别使用电化学动电位再活化（EPR）测试和点蚀电位测量来测量。再活化率和点蚀电位与其化学成分相对应。含有较多 Cr 和 Mo 的试样表现出较高的电阻。在 EPR 测试中，Cr 含量相对较低的枝晶核被腐蚀。在点蚀试验中，碳化铌成为沿晶胞结构传播的点蚀起始点。