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试验研究

Q235钢在武汉土壤中的腐蚀行为研究

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  • 1. 武汉材料保护研究所有限公司; 2. 湖北武汉大气淡水环境材料腐蚀国家野外科学观测研究站
徐 立(1993-),硕士研究生,助理工程师,主要研究方向为金属材料的土壤腐蚀,电话:18986697356,E-mail:243261398@qq.com

收稿日期: 2021-08-27

  修回日期: 2021-09-23

  录用日期: 2021-10-20

  网络出版日期: 2023-12-26

Research of Corrosion Behavior of Q235 Steel in Wuhan Soil

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  • 1.Wuhan Research Institute of Materials Protection, Wuhan 430000, China;2.Wuhan Materials Corrosion National Observation and Research Station, Wuhan 430000, China

Received date: 2021-08-27

  Revised date: 2021-09-23

  Accepted date: 2021-10-20

  Online published: 2023-12-26

摘要

为了评价武汉土壤对Q235钢的腐蚀性,通过对湖北武汉地区典型土壤进行取样,成分分析,采用实际土壤埋片试验和控制温度、湿度的加速腐蚀试验,应用超景深显微镜、聚焦离子束扫面电镜(FIB-SEM),电化学工作站等设备研究了Q235钢在武汉土壤中的腐蚀行为。试验结果表明:武汉土壤环境为“轻”腐蚀等级,Q235钢发生了由非均匀腐蚀向全面腐蚀的转变,表面出现了点蚀和剥落,且其程度随时间的延长而增大,其腐蚀速率随时间的延长而降低并趋于稳定。随着腐蚀的进行,Q235钢的自腐蚀电位上升,自腐蚀电流密度降低。综上,Q235钢在武汉土壤环境中抗腐蚀性能尚可,适合作为结构材料大量使用。

本文引用格式

徐立, 周学杰, 郑鹏华, 吴建平, 吴军 . Q235钢在武汉土壤中的腐蚀行为研究[J]. 材料保护, 2022 , 55(2) : 74 -80 . DOI: 10.16577/j.issn.1001-1560.2022.0041

Abstract

For evaluating the corrosive performance of the soil in Wuhan, the composition of typical soil in Wuhan, Hubei Province was sampled and analyzed.The corrosion behavior of Q235 steel in Wuhan soil was studied by using actual soil buried test and accelerated corrosion test with controlling temperature and humidity and applying super depth of field microscope, focused ion beam scanning electron microscope(FIB-SEM)and electrochemical workstation.Experimental results showed that the soil environment in Wuhan was of “light” corrosion grade, and the Q235 steel had changed from non-uniform corrosion to general corrosion, and its surface showed pitting corrosion and spalling.In addition, the degree of corrosion increased with the extension of time, and its corrosion rate decreased and stabilized with the extension of time.With the progress of corrosion, the self-corrosion potential of Q235 steel increased, and the self-corrosion current density decreased.In summary, Q235 steel had acceptable corrosion resistance in Wuhan soil environment, which was suitable for large-scale use as structural materials.
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