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  

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

作　　者：杨震宇 基超 郭丽雅 徐闰[1,2] 彭伟 赵洪山[1,2] 韦习成 董瀚[1,2] YANG Zhenyu;JI Chao;GUO Liya;XU Run;PENG Wei;ZHAO Hongshan;WEI Xicheng;DONG Han(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;Zhejiang Institute of Advanced Materials,Shanghai University,Jiaxing 314113,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]上海大学(浙江)高端装备基础件材料研究院,嘉兴314113

出　　处：《中国腐蚀与防护学报》2025年第2期469-478,共10页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52201078和42276214);上海市青年科技英才扬帆计划(21YF1412800)。

摘　　要：采用电化学和浸泡腐蚀实验,结合扫描电镜、3D光学轮廓仪和显微Raman光谱仪等研究了纯铁3N2、4N2、5N2以及普碳钢Q235B、耐候钢SPA-H、不锈钢304L在3.5%NaCl溶液中的初期腐蚀行为。电化学阻抗谱结果表明样品的腐蚀速率为:304L<5N2<4N2<3N2<SPA-H<Q235B。扫描电镜和3D轮廓仪揭示了纯铁3N2、4N2和5N2发生了局部腐蚀,其中3N2蚀坑最深。各样品表面腐蚀产物的主要成分为Fe_(3)O_(4)、γ-FeOOH和α-FeOOH。The initial corrosion behavior of three pure irons of different purity 3N2,4N2 and 5N2,carbon steel Q235B,weathering steel SPA-H and stainless steel 304L in 3.5%NaCl solution was comparatively investigated by means of immersion test,electrochemical measurements,scanning electron microscopy,3D profiling microscope and laser confocal Raman microscope.Results showed that according to the electrochemical impedance value,the corrosion rate of the six test materials from low to high is as following:304L<5N2<4N2<3N2<SPA-H<Q235B.The scanning electron microscopy observation and 3D profiling microscope measurement revealed that the three pure irons 3N2,4N2 and 5N2 exhibited localized corrosion;while the 3N2 presented the deepest corrosion pits.The corrosion products mainly consisted of Fe_(3)O_(4),γ-FeOOH andα-FeOOH for all the six test materials.

关 键 词：纯铁 电化学 蚀坑 腐蚀产物 

分 类 号：TG174[金属学及工艺—金属表面处理]