湖南地区大气腐蚀严酷性的环境因素与大气腐蚀监测仪评定

doi:10.11902/1005.4537.2020.103

中国腐蚀与防护学报

2021, Vol. 41

Issue (4): 487-492 DOI: 10.11902/1005.4537.2020.103

研究报告

本期目录 | 过刊浏览

湖南地区大气腐蚀严酷性的环境因素与大气腐蚀监测仪评定

王军¹, 陈军君¹, 谢亿¹, 徐松¹, 刘兰兰², 吴堂清³(

), 尹付成³

^1.国网湖南省电力有限公司电力科学研究院长沙 410007
^2.国网湖南省电力有限公司输电检修公司长沙 410100
^3.湘潭大学材料科学与工程学院湘潭 411105

Evaluation of Environmental Factors Related with Atmosphere Corrosivity in Hunan Provice by Atmospheric Corrosion Monitoring Technique

WANG Jun¹, CHEN Junjun¹, XIE Yi¹, XU Song¹, LIU Lanlan², WU Tangqing³(

), YIN Fucheng³

^1.State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, China
^2.State Grid Hunan Electric Power Company Limited Transmission Maintenance, Changsha 410100, China
^3.School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China

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摘要:

通过大气暴晒试验和大气腐蚀监测仪 (ACM) 技术研究了碳钢在湖南大气环境中的腐蚀行为，探讨了大气环境因素、样品形状因子等对大气环境腐蚀严酷性评估的影响。结果表明，湖南地区碳钢腐蚀速率与空气中SO₂沉积量呈正相关关系，但氯化工厂附近Cl^-的沉积量成为了影响碳钢腐蚀的重要因素。在相同大气环境中，Q345钢的腐蚀速率快于Q235钢，Q235角钢的腐蚀速率快于Q235平板钢。ACM累计电量与Q235钢大气腐蚀速率之间符合线性关系，ACM技术可用于碳钢大气腐蚀行为预测和环境腐蚀性评定。

关键词 ： Q235钢, Q345钢, 大气腐蚀, ACM技术

Abstract：

The corrosion behavior of carbon steels in Hunan province was comparatively studied via atmospheric exposure testing and atmospheric corrosion monitoring (ACM) technique, while the effects of environmental factors and the samples' shape on the corrosivity evaluation of atmospheric environments were assessed. The results showed that the corrosion rate of carbon steels have a positive correlation with SO₂ deposit rate in the atmosphere, while the Cl^- deposit rate becomes the important influence factor when the corrosion of carbon steels exposed in sites at or nearby a chlorine chemical plant. The corrosion rate of Q345 steel is higher than that of Q235 steel, and the corrosion rate of Q235 angle steel is higher than that of the Q235 flat steel. A linear relationship between the corrosion rate and the cumulative electric quantity measured by ACM was revealed for Q235 carbon steel, thus ACM technology can be used to predict the atmospheric corrosion behavior of carbon steels and assess the corrosivity of atmospheric environments.

Key words： Q235 steel Q345 steel atmospheric corrosion ACM technology

收稿日期: 2020-06-13

ZTFLH:

TG172.4

基金资助:国网公司科技项目(5216A01600VW)

通讯作者: 吴堂清 E-mail: tqwu10s@alum.imr.ac.cn

Corresponding author: WU Tangqing E-mail: tqwu10s@alum.imr.ac.cn

作者简介: 王军，男，1984年生，博士，高级工程师

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引用本文:

王军, 陈军君, 谢亿, 徐松, 刘兰兰, 吴堂清, 尹付成. 湖南地区大气腐蚀严酷性的环境因素与大气腐蚀监测仪评定[J]. 中国腐蚀与防护学报, 2021, 41(4): 487-492.
Jun WANG, Junjun CHEN, Yi XIE, Song XU, Lanlan LIU, Tangqing WU, Fucheng YIN. Evaluation of Environmental Factors Related with Atmosphere Corrosivity in Hunan Provice by Atmospheric Corrosion Monitoring Technique. Journal of Chinese Society for Corrosion and protection, 2021, 41(4): 487-492.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.103 或 https://www.jcscp.org/CN/Y2021/V41/I4/487

图1 Q235平板钢、Q345平板钢和Q235角钢在14个站点的年腐蚀深度

图2 环境因素与Q235平板钢腐蚀速率之间的关系

图3 在2、3、10、14号试验点暴晒2 a后Q235平板钢和Q235角钢表面腐蚀产物宏观形貌

图4 2、3、10、14号试验点中Q235平板钢，Q345平板钢和Q235角钢年腐蚀深度随时间的演化

图5 腐蚀影响因子与腐蚀速率的关系

图6 ACM累积电量与腐蚀速度之间的关系

表1 ACM环境腐蚀性评价标准与ISO环境腐蚀性评价标准的对比

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