S32750超级双相不锈钢在NaCl溶液中的临界点蚀温度及电化学腐蚀机理

发布时间：2019-05-15 17:18

【摘要】：采用电化学测试研究了S32750超级双相不锈钢在3.5%Na Cl溶液中的临界点蚀温度(CPT)及电化学腐蚀机理,结合试样点蚀前后的形貌变化,得出S32750不锈钢的临界点蚀温度为71℃。在低于临界点蚀温度时,不锈钢表面能形成稳定的钝化膜;高于临界点蚀温度时,由于Cl-的活性增加及钝化膜的溶解,不锈钢表面产生点蚀现象,且温度越高,点蚀越剧烈。构建了双相不锈钢S32750临界点蚀温度前后的电化学腐蚀模型。
[Abstract]:The critical pitting temperature (CPT) and electrochemical corrosion mechanism of S32750 super duplex stainless steel in 3.5%Na Cl solution were studied by electrochemical measurement, and the morphology of S32750 super duplex stainless steel before and after pitting corrosion was studied. The critical pitting temperature of S32750 stainless steel is 71 鈩，

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