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5 浸泡于3.5%NaCl溶液中1 h后样品的腐蚀坑特征

Table 5 Characteristics of pits of six test materials after immersion in 3.5%NaCl solution for 1 h

Materials Max pit depth / μm Average pit depth / μm Average pit width / μm Number of pits Q235B steel 29.8 7.4 ± 6.1 82.7 ± 43.5 43 SPA-H steel 19.1 7.3 ± 3.4 11.2 ± 8.5 98 304L stainless steel 8.1 3.4 ± 1.5 6.2 ± 3.2 30 3N2 pure iron 26.1 8.3 ± 5.6 57.4 ± 20.4 64 4N2 pure iron 22.5 4.9 ± 2.6 32.5 ± 18.4 67 5N2 pure iron 20.4 5.6 ± 2.6 18.5 ± 14.5 48