Abstract The corrosion resistance of austenitic stainless steels AISI 316L, AISI 904L and Sanicro 28 and duplex stainless steels SAF 2205, SAF 2507 and SAF 2707, was studied at 40 and 60 °C in a strong acid mixture containing tartaric acid saturated solution, H 2 SO 4 and HCl. Anodic selective dissolution, weight loss and electrochemical impedance tests were performed. The results show that all stainless steels corrode actively and the micro-galvanic coupling, present on duplex stainless steels and 316L, determines severe selective corrosion and impairs their tendency to passivate. 904L and Sanicro 28 showed this tendency and the lowest corrosion rates.

中文翻译：

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强酸混合物中不锈钢腐蚀的研究。第 2 部分：阳极选择性溶解、失重和电化学阻抗谱测试

摘要 奥氏体不锈钢 AISI 316L、AISI 904L 和 Sanicro 28 以及双相不锈钢 SAF 2205、SAF 2507 和 SAF 2707 的耐腐蚀性能在 40 和 60 °C 下在含有酒石酸饱和溶液 H 2 的强酸混合物中进行研究。 SO 4 和 HCl。进行了阳极选择性溶解、失重和电化学阻抗测试。结果表明，所有不锈钢都会主动腐蚀，双相不锈钢和 316L 上存在的微电流耦合决定了严重的选择性腐蚀并削弱了它们的钝化趋势。904L 和 Sanicro 28 显示出这种趋势和最低的腐蚀速率。