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2 Custom455不锈钢时效处理1 h在3.5%NaCl溶液中的EIS拟合参数值

Table 2 Fitting electrochemical parameters of EIS of Custom455 stainless steel with 1 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-1 h 2.045 1.0443 × 10-4 0.83613 4278 450oC-1 h 2.484 9.018 × 10-5 0.82998 5357 500oC-1 h 2.892 7.4562 × 10-5 0.84689 7622 550oC-1 h 2.79 6.2188 × 10-5 0.88235 11443 600oC-1 h 3.272 1.0213 × 10-4 0.82942 5131