时效处理对马氏体时效硬化不锈钢显微组织和局部腐蚀性能的影响

洪孝木, 王永强, 李娜, 田凯, 杜娟

Effect of Aging on Microstructures and Localized Corrosion of Custom455 Martensitic Age-hardening Stainless Steel

HONG Xiaomu, WANG Yongqiang, LI Na, TIAN Kai, DU Juan

表3 Custom455不锈钢时效处理3 h在3.5%NaCl溶液中的EIS拟合参数值

Table 3 Fitting electrochemical parameters of EIS of Custom455 stainless steel with 3 h aging in 3.5%NaCl solution

Specimen Rs / Ω·cm2 CPE-T / F·cm-2·s n CPE-n Rp / Ω·cm2 Solid solution 2.623 1.5493 × 10-4 0.81756 3165 400oC-3 h 4.917 1.227 × 10-4 0.84227 3707 450oC-3 h 2.322 9.2448 × 10-5 0.84043 4261 500oC-3 h 2.917 8.1282 × 10-5 0.80768 4304 550oC-3 h 2.888 7.2198 × 10-5 0.85967 9138 600oC-3 h 3.207 9.8621 × 10-5 0.84144 3690