Abstract

The present paper investigates the effect of cold working and electrochemical nitridation on corrosion resistance of 316L austenitic stainless steel (ASS). The X-ray diffraction results showed that the strain-induced martensite is formed on cold work. Also, the volumetric fraction of strain induced martensite and dislocation density increased with increase in degree of cold work. The cold working process adversely affects the corrosion resistance of 316L ASS due to the formation of the strain-induced martensite and increased dislocation density. On electrochemical nitridation, the electrochemical results show the formation of stable passive film, thus improving the corrosion resistance of 316L ASS attributed to the formation of nitrides on the surface. Moreover, the beneficial effect of electrochemical nitridation is more pronounced in cold worked samples, thus the adverse effects of cold working can be overcome by electrochemical nitridation.

中文翻译：

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冷加工和电化学氮化对酸性环境下316L奥氏体不锈钢腐蚀行为的影响

摘要

本文研究了冷加工和电化学氮化对316L奥氏体不锈钢（ASS）耐腐蚀性的影响。X射线衍射结果表明，应变诱发的马氏体是在冷作过程中形成的。另外，应变诱导马氏体的体积分数和位错密度随着冷加工程度的增加而增加。由于应变诱发马氏体的形成和位错密度的增加，冷加工过程会对316L ASS的耐腐蚀性产生不利影响。在电化学氮化中，电化学结果表明形成了稳定的钝化膜，从而改善了316L ASS的耐蚀性，这归因于表面氮化物的形成。此外，