In situ monitoring of crevice corrosion morphology of Type 316L stainless steel and repassivation behavior induced by sulfate ions
In situ monitoring of crevice corrosion morphology of Type 316L stainless steel and repassivation behavior induced by sulfate ions
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DOI：
10.1016/j.corsci.2017.08.005
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发表时间：
2017-10-01
影响因子：
8.3
通讯作者：
Hara, Nobuyoshi
中科院分区：
文献类型：
--
作者：
Aoyama, Takahito;Sugawara, Yu;Hara, Nobuyoshi
为了分析SO 42-离子引起的再钝化机理，对316L不锈钢的缝隙腐蚀形貌进行了原位监测。当溶液从1 M NaCl变为0.88 M Na 2SO 4或变为1 M NaCl-0.88 M Na 2SO 4时，观察到缝隙腐蚀的再钝化。在pH = 0.4的条件下，316L不锈钢的阳极极化曲线显示，SO 42-离子抑制了不锈钢的活性溶解。从活性到被动状态的缝隙内的转变可能是由SO 42-离子促进。
To analyze the repassivation mechanism induced by SO42- ions, in situ monitoring of the crevice corrosion morphology on Type 316L stainless steel was performed. The repassivation of the crevice corrosion was observed when the solution was changed from 1 M NaCl to 0.88 M Na2SO4 or to 1 M NaCl-0.88 M Na2SO4. The active dissolution of Type 316L stainless steel was suppressed by SO42- ions at pH 0.4 in anodic polarization measurements. The transition from active to passive states inside the crevice was likely promoted by SO42- ions.