Commercial grade type 2205 duplex stainless steel is resistant to localised corrosion at room temperature. With the application of bipolar electrochemistry, pitting and crevice corrosion can be probed at room temperature, with corrosion pits nucleated in 0.1 M HCl within 15 s of exposure. The evolution of localised corrosion kinetics as a function of applied electrochemical potential is discussed. Pit nucleation occurred at the interface between ferrite and austenite, growing into the ferrite phase. Pits with lacy covers formed via selective dissolution of the ferrite.

中文翻译：

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通过双极电化学实验快速测试2205型双相不锈钢的环境温度点蚀

商业级2205型双相不锈钢在室温下可抵抗局部腐蚀。通过应用双极电化学，可以在室温下探测点蚀和缝隙腐蚀，并在暴露后15 s内在0.1 M HCl中形成腐蚀点。讨论了局部腐蚀动力学随所施加的电化学势的变化。坑形核在铁素体和奥氏体之间的界面处发生，并发展为铁素体相。通过选择性溶解铁素体形成带有花边覆盖物的坑。