6种典型商用纯铁和钢材在3.5%NaCl溶液中的初期腐蚀行为

杨震宇, 基超, 郭丽雅, 徐闰, 彭伟, 赵洪山, 韦习成, 董瀚

Initial Corrosion Behavior of Several Pure Irons and Steels in 3.5%NaCl Solution

YANG Zhenyu, JI Chao, GUO Liya, XU Run, PENG Wei, ZHAO Hongshan, WEI Xicheng, DONG Han

表3 6种实验材料在3.5%NaCl溶液浸泡1 h后的EIS拟合数据

Table 3 Fitting data of EIS of six test materials immersed in 3.5%NaCl solution for 1 h

Materials Rs / Ω·cm2 CPEox × 10-4 / Ω-1·cm-2·S n n Rox / Ω·cm2 CPEdl × 10-4 / Ω-1·cm-2·S n n Rct / Ω·cm2 RP / Ω·cm2 Q235B steel 8.5 14.5 0.74 46.7 0.9 0.85 408.7 455.4 SPA-H steel 9.6 16.4 0.70 15.6 4.5 0.71 511.6 527.5 3N2 pure iron 4.8 53.6 0.81 430.7 75.2 0.70 251.4 682.1 4N2 pure iron 5.2 11.1 0.76 770.1 229.5 0.91 170.7 940.8 5N2 pure iron 4.8 7.2 0.82 882.5 291.0 0.92 270.8 1153.3 304L stainless steel 11.6 0.6 0.99 7800.0 0.1 0.94 229600.0 237400.0