高强度耐候H型钢和普通C-Mn低合金H型钢耐大气腐蚀性能比较
Comparison of Atmospheric Corrosion Resistance between High Strength Weathering H Section Steel and Common C-Mn Steel
摘 要
通过周浸加速腐蚀试验,对比了高强度耐候H型钢与普通C-Mn低合金H型钢的耐蚀性能, 采用扫描电镜(SEM)、X射线衍射(XRD)及电化学阻抗谱(EIS)等方法研究了两种钢腐蚀产物的形貌、组成以及电化学性质的差异。结果表明,在模拟工业大气环境下, 高强耐候H型钢的耐蚀性显著优于普通C-Mn钢,腐蚀产物性质的差别是导致两种钢腐蚀率差异的主要原因。普通C-Mn钢腐蚀后表面粗糙, 锈层疏松且存在大量贯穿性裂纹; 耐候H型钢锈层连续致密, 且腐蚀产物主要由保护性较好的α-FeOOH和非晶态锈组成, 能有效减缓电化学腐蚀反应的进行。
耐候性
大气腐蚀
锈层
H section steel
weathering resistance
atmospheric corrosion
rust layer
Abstract
The differences of corrosion resistance between high strength weathering H section steel (HSWS-H) and common C-Mn steel (CMS) were investigated by cyclic immersion corrosion test, scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemical impedance spectroscopy (EIS). The results showed that HSWS-H exhibited much higher corrosion resistance than CMS in the simulated industrial atmospheric environment. The difference between two corrosion products of the experimental steels was the main cause of the corrosion rate difference. The corrosion surface of CMS was rough, the rust layer was loose and had lots of perfoliate crack. The rust layer of HSWS-H was continuous, dense and mainly consisted of α-FeOOH and amorphous phase, which can inhibit the electrochemical corrosion reaction effectively.
中图分类号 TG174.2 TG142.41
所属栏目 试验研究
基金项目 国家科技支撑计划“高效节约型建筑用钢应用技术研究”(2007BAE30B05)
收稿日期 2010/4/6
修改稿日期 2010/4/12
网络出版日期
作者单位点击查看
备注米丰毅,博士研究生,
引用该论文: MI Feng-yi,WANG Xiang-dong,CHEN Xiao-ping,PENG Yun,TAO Dong-ping. Comparison of Atmospheric Corrosion Resistance between High Strength Weathering H Section Steel and Common C-Mn Steel[J]. Corrosion & Protection, 2011, 32(1): 1
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【3】郝献超, 苏鹏, 肖葵,等. 不同NaCl浓度对耐候钢腐蚀产物的影响[J]. 腐蚀与防护,2009,30(5):297-299.
【4】Asami K,Kikuchi M. In-depth distribution of rusts on a plain carbon steel and weathering steels exposed to coastal-industrial atmosphere for 17 years[J]. Corrosion Science,2003,45(11):2671-2688.
【5】Singh A K,Ericsson T,Haggstrom L. Mssbauer and X-ray diffraction phase analysis of rusts from atmospheric test sites with different environments in Sweden[J]. Corrosion Science,1985,25(10):931-945.
【6】汪川, 王振尧, 柯伟. Q235碳钢在SO2气体中的初期腐蚀行为[J]. 金属学报,2008,44(6):729-734.
【7】Stratmann M,Bohnenkamp K,Ramchandran T. The influence of copper upon the atmospheric corrosion of iron[J]. Corrosion Science,1987,27(9):905-926.
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【10】Evans U R,Taylor C A J. Mechanism of atmospheric rusting[J]. Corrosion Science,1972,12:227-246.
【11】陈亮, 刘正生, 吴立新,等. 耐大气腐蚀钢锈层的X射线衍射与SEM分析[J]. 钢铁研究,1994,1:32-36.
【12】Wang J H,Wei F I,Chang Y S,et al. The corrosion mechanisms of carbon steel and weathering steel in SO2 polluted atmospheres[J]. Material Chemistry and Physics,1997,47(1):1-8.
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