The influence of a severe shot peening (SSP) treatment in corrosion resistance of AISI 316 L austenitic stainless steel was studied by different electrochemical measurements in 3.5% NaCl solution. SSP promoted the formation of ultrafine grains in the upper layer. The formation of strain induced martensite appears to be facilitated by twinning due to the induced severe plastic deformation. SSP treatment with subsequent low temperature annealing (350ºC) improved corrosion resistance. The distinction of corrosion resistance is attributed to the different mechanical and microstructural features caused by severe plastic deformation. The best properties and stability of passive film were corroborated from various electrochemical techniques: potentiodynamic polarization, potentiostatic polarization and electrochemical impedance spectroscopy.

中文翻译：

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喷丸引起的剧烈表面塑性变形对细晶316L不锈钢组织和耐蚀性的影响

通过在 3.5% NaCl 溶液中进行不同的电化学测量，研究了严格喷丸 (SSP) 处理对 AISI 316 L 奥氏体不锈钢耐腐蚀性的影响。 SSP促进了上层超细晶粒的形成。由于诱发的严重塑性变形，孪生似乎促进了应变诱发马氏体的形成。 SSP 处理和随后的低温退火 (350°C) 提高了耐腐蚀性。耐腐蚀性的区别归因于严重塑性变形引起的不同机械和微观结构特征。钝化膜的最佳性能和稳定性通过各种电化学技术得到证实：动电位极化、恒电位极化和电化学阻抗谱。