碳钢在达州典型大气环境下的腐蚀行为研究
Study on Corrosion Behavior of Carbon Steel in Typical Atmospheric Environments in Dazhou
王方强 1王志高 1海潮 2耿植 1杜翠薇2
作者信息
- 1. 国网四川省电力公司电力科学研究院,四川 成都 610041
- 2. 北京科技大学腐蚀与防护中心,北京 100083
- 折叠
摘要
通过1年期现场暴露试验、腐蚀速率分析、锈层形貌观察、锈层组成分析及电化学测试等试验方法,研究了Q235 碳钢在达州典型大气环境下的腐蚀行为.结果表明,位于工业大气环境的达州市通川区,Q235 碳钢的腐蚀速率为 23.78 μm/a,而位于乡村大气环境的达州市万源市,Q235 碳钢的腐蚀速率仅为 10.33 μm/a.Q235 碳钢表面腐蚀产物主要组成为γ-FeOOH、α-FeOOH和Fe3O4.电化学结果表明,在达州重工业环境下的碳钢腐蚀较为严重,腐蚀产物层电阻和电荷转移电阻均高于达州乡村环境,说明其表面锈层能有效保护基体,减缓基体的进一步腐蚀.
Abstract
The corrosion behavior of Q235 carbon steel in typical atmospheric environments in Dazhou is studied by 1-year outdoor exposure test,corrosion rate analysis,rust layer morphology observation,rust layer composition analysis and electrochemical test.The results show that the corrosion rate of Q235 carbon steel is 23.78 μm/a in Tongchuan district of Dazhou,which is located in industrial atmosphere,while the corrosion rate of Q235 carbon steel is only 10.33 μm/a in Wanyuan of Dazhou,which is located in rural atmosphere.The surface corrosion products are mainly composed of γ-FeOOH,α-FeOOH and Fe3O4.The electrochemical results show that the corrosion of carbon steel in heavy industrial environment of Dazhou is more serious,and its resistance of corrosion product scale and charge transfer resistance are higher than that in rural environment of Dazhou,which indicates that the surface rust layer could effectively protect the substrate and slow down further corrosion of the substrate.
关键词
碳钢/大气腐蚀/重工业污染环境Key words
carbon steel/atmospheric corrosion/heavy industrial pollution of environment引用本文复制引用
基金项目
国家科技基础资源调查专项(2021FY100600)
国家电网四川省电力公司科技项目(521997230012)
出版年
2024
NETL
NSTL
万方数据