Q235和Q345钢在红沿河大气环境中的腐蚀行为
Corrosion Behavior of Q235 and Q345 Carbon Steel in Hongyanhe Atmosphere
摘 要
通过大气暴露腐蚀试验、失重分析、扫描电子显微镜（SEM）、X射线衍射（XRD）等方法研究了Q235和Q345钢在红沿河大气环境中的腐蚀行为。结果表明：Q345钢在初期的腐蚀速率大于Q235钢的，随着曝晒时间的增加，两种钢的腐蚀速率趋于一致。在曝晒18个月时，腐蚀速率的下降出现平台期。红沿河工业海洋性大气环境的腐蚀等级为C3级，SO2和Cl-的协同作用体现为：在低碳钢锈层中形成了可溶性硫酸盐，从而形成了贯穿锈层的裂纹，减弱了低碳钢锈层的保护性作用。
工业海洋大气
SO2和Cl-协同作用
low carbon steel
industrial marine atmosphere
the synergy of SO2 and Cl-
Abstract
The corrosion behavior of Q234 and Q345 steel in Hongyanhe atmosphere was investigated by atmospheric exposure corrosion test, corrosion mass loss test, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the corrosion rate of Q345 steel was higher than that of Q235 steel at the early stage. With the increase of exposed time the corrosion rate became no difference. When exposed for 18 months, the decline of corrosive rate turned into plateau progression. The atmospheric corrosion level of Hongyanhe is C3. In this atmosphere the synergy of SO2 and Cl- initiated the formation of sulfate in the low carbon steel rust layer and the formation of cracks throughout the whole rust layer slowed down the corrosion rate of low carbon steel.
中图分类号 TG174 DOI 10.11973/fsyfh-201801005
所属栏目 试验研究
基金项目
收稿日期 2016/5/15
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联系人作者曹公望(gwcao@imr.ac.cn)
引用该论文: CAO Gongwang,LIU Yuwei,ZHANG Dandan,WANG Zhenyao,CAO Yan,HUO Yang. Corrosion Behavior of Q235 and Q345 Carbon Steel in Hongyanhe Atmosphere[J]. Corrosion & Protection, 2018, 39(1): 24
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【3】王振尧,于全成,汪川,等. 在含硫污染的海洋大气环境中核电用钢的腐蚀行为[J]. 科学通报,2012,57(31):2991-2998.
【4】屈庆,严川伟,张蕾,等. NaCl和SO2在A3钢初期大气腐蚀中的协同效应[J]. 金属学报,2002,38(10):1062-1066.
【5】郝显赫,王振尧,汪川. 锌在辽宁红沿河核电站的大气腐蚀研究[J]. 装备环境工程,2012,9(3):108-110,124.
【6】EVANS U R. Mechanism of rusting[J]. Corrosion Science,1969,9(11):813-821.
【7】MAYNE J E O. The problem of painting rusty steel[J]. Journal of Applied Chemistry,2007,9(12):673-680.
【8】MA Y,LI Y,WANG F. Corrosion of low carbon steel in atmospheric environments of different chloride content[J]. Corrosion Science,2009,51(5):997-1006.
【9】CASTANO J G,BOTERO C A,RESTREPO A H,et al. Atmospheric corrosion of carbon steel in Colombia[J]. Corrosion Science,2010,52(1):216-223. (
【10】CORVO F,HACES C,BETANCOURT N,et al. Atmospheric corrosivity in the Caribbean area[J]. Corrosion Science,1997,39(5):823-833.
【11】DE LA F D,DIAZ I,SIMANCAS J,et al. Long-term atmospheric corrosion of mild steel[J]. Corrosion Science,2011,53(2):604-617.
【12】PATHAK R K,YAO X,LAU A K H,et al. Acidity and concentrations of ionic species of PM2.5 in Hong Kong[J]. Atmospheric Environment,2003,37(8):1113-1124.
【13】ROSS T K,CALLAGHAN B G. The seasonal distribution of ferrous sulphate formed during the atmospheric rusting of mild steel[J]. Corrosion Science,1966,6(7):337-343.
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