This study considers the corrosion behavior of the X5CrNi18 10 stainless steel‐welded joint in NaCl solution, with and without the presence of several corrosion inhibitors (NaNO₃, Ce(NO₃)₃, and CeCl₃). The degree of sensitization of the welded joint to intergranular corrosion is determined using the electrochemical potentiokinetic reactivation method with a double‐loop method. Pitting corrosion tests are performed by the potentiodynamic method. Resistance to general corrosion and the stability of the passive film is assessed based on the results of electrochemical impedance spectroscopy measurements, as well as on the values of the corrosion and passivation current. The main goal of this study is to determine the relation of the welded joint microstructure to general and pitting corrosion in the presence of the corrosion inhibitors. The value of pitting potential for the base metal and weld metal in the presence of the NaNO₃ or Ce(NO₃)₃ inhibitor is shifted to potentials in the transpassive area. The pitting potential for the heat‐affected zone also possesses a noticeable higher value. However, nitrate ions do not increase the general corrosion resistance of any part of the welded joint. CeCl₃ does not increase resistance to general or pitting corrosion.

中文翻译：

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抑制剂对X5CrNi18 10不锈钢焊接接头的腐蚀行为的影响

这项研究考虑了X5CrNi18 10不锈钢焊接接头在NaCl溶液中的腐蚀行为，有无腐蚀抑制剂（NaNO ₃，Ce（NO ₃）₃和CeCl ₃）。焊接接头对晶间腐蚀的敏感程度是使用双回路法的电化学电位动力学再活化方法确定的。点腐蚀试验是通过电位动力学方法进行的。基于电化学阻抗谱测量的结果以及腐蚀和钝化电流的值，评估了对一般腐蚀的抵抗力和钝化膜的稳定性。这项研究的主要目的是确定在存在缓蚀剂的情况下焊接接头的微观结构与一般腐蚀和点蚀的关系。NaNO ₃或Ce（NO ₃）₃存在下母材和焊缝金属的点蚀电位值抑制剂被转移到跨被动区的电位。热影响区的点蚀电位也具有明显更高的值。但是，硝酸根离子不会增加焊接接​​头任何部分的总体耐腐蚀性。CeCl ₃不会增加对一般腐蚀或点蚀的抵抗力。