Corrosion Behavior of ZG20Mn Exposed to Atmosphere of Qingdao Bay Bridge

YANG Haiyang; ZHANG Bo; SUN Dandan; DING Guoqing; DONG Caichang; HAN Bing

doi:10.11973/fsyfh-202201003

Corrosion & Protection > 2022 > 43(1): 14-17. > DOI: 10.11973/fsyfh-202201003

YANG Haiyang, ZHANG Bo, SUN Dandan, DING Guoqing, DONG Caichang, HAN Bing. Corrosion Behavior of ZG20Mn Exposed to Atmosphere of Qingdao Bay Bridge[J]. Corrosion & Protection, 2022, 43(1): 14-17. DOI: 10.11973/fsyfh-202201003

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Corrosion Behavior of ZG20Mn Exposed to Atmosphere of Qingdao Bay Bridge

1. Central Iron & Steel Research Institute, Beijing 100081, China;
2. Qingdao NCS Testing & Corrosion Protection Technology Co. Ltd., Qingdao 266071, China

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Received Date: June 23, 2020

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Exposure test was carried out on ZG20Mn steel in the atmosphere of Qingdao Bay Bridge for 7 a. The corrosion behavior of ZG20Mn steel was studied by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The results show that in the atmosphere of Qingdao Bay Bridge, with the increase of exposure time, the corrosion rate showed a downward trend. The relationship between average corrosion depth and exposure time conformed to a power function. With the increase of exposure time, the tendency of localized corrosion of ZG20Mn steel increased, and the depth of pitting corrosion increased. MnS inclusions and chlorinated salt particles promoted the occurrence of corrosion. The corrosion products of ZG20Mn steel exposed to the atmosphere of Qingdao Bay Bridge for 7 a were mainly composed of α-FeOOH, α-Fe₂O₃ and Fe₃O₄. The continuous generation and deposition of α-FeOOH was the main reason for the gradual decrease of corrosion rate of steel in atmosphere. The presence of Fe₃O₄ indicated that the corrosion products with electro-chemical activity participated in the cathodic depolarization process.
- atmospheric corrosion,
- exposure test,
- ZG20Mn steel

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[1]	刘建容, 张万灵. 试验钢在不同大气环境下的腐蚀性能研究[J]. 钢铁研究, 2009, 37(3): 27-29.
[2]	梁彩凤, 侯文泰. 碳钢、低合金钢16年大气暴露腐蚀研究[J]. 中国腐蚀与防护学报, 2005, 25(1): 1-6.
[3]	侯文泰, 于敬敦, 梁彩凤. 碳钢及低合金钢的大气腐蚀[J]. 中国腐蚀与防护学报, 1993, 13(4): 291-302.
[4]	侯文泰, 于敬敦, 梁彩凤. 钢的大气腐蚀性4年调查及其机理研究[J]. 腐蚀科学与防护技术, 1994, 6(2): 137-142.
[5]	梁彩凤, 侯文泰. 碳钢及低合金钢8年大气暴露腐蚀研究[J]. 腐蚀科学与防护技术, 1995, 7(3): 183-186.
[6]	史艳华, 梁平, 王玉安, 等. Q235和Q345钢在模拟海水中的腐蚀行为[J]. 辽宁石油化工大学学报, 2013, 33(1): 5-8.
[7]	张春亚, 陈学群, 陈德斌, 等. 不同低碳钢的点蚀诱发敏感性及诱发机理研究[J]. 中国腐蚀与防护学报, 2001, 21(5): 265-272.
[8]	陈学群, 孔小东, 常万顺, 等. 低碳钢中硫化物夹杂物诱发点蚀的机理[J]. 海军工程学院学报, 1997, 9(1): 1-9.
[9]	陈学群, 常万顺, 陈德斌. 碳钢中夹杂物诱发点蚀的规律和特性研究[J]. 海军工程大学学报, 2004, 16(6): 30-36.
[10]	YAMASHITA M, MIYUKI H, MATSUDA Y, et al. The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century[J]. Corrosion Science, 1994, 36(2): 283-299.
[11]	EVANS U R, TAYLOR C A J. Mechanism of atmospheric rusting[J]. Corrosion Science, 1972, 12(3): 227-246.
[12]	松岛岩, 靳裕康. 低合金耐蚀钢: 开发、发展及研究: 钢铁技术发展趋丛书[M]. 北京: 冶金工业出版社, 2004: 230.
[13]	HORLÉ S, MAZAUDIER F, DILLMANN P, et al. Advances in understanding atmospheric corrosion of iron. II. Mechanistic modelling of wet-dry cycles[J]. Corrosion Science, 2004, 46(6): 1431-1465.
[14]	STRATMANN M, HOFFMANN K. In situ MÖβbauer spectroscopic study of reactions within rust layers[J]. Corrosion Science, 1989, 29(11/12): 1329-1352.

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