Journal of Liaoning Petrochemical University ›› 2013, Vol. 33 ›› Issue (4): 70-73.

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Corrosion Behavior of Q345 Steel in Soil Contaminated by Lead

CHEN Siyao1, LI Tao1*, LI Quanli2, SHI Yanhua3, LIANG Ping3   

  1.  
    1.School of Materials & Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner 
    Mongolia 014010, China; 2.CNPC Greatwall Drilling compang Materials Company, Beijing 100101, China；
    3.School of Mechanical Engineering of Liaoning Shihua University, Fushun Liaoning 113001, China
  • Received:2013-05-18 Published:2013-12-25 Online:2017-07-14

Q345钢在铅污染土壤中的腐蚀行为研究

陈思瑶1,李涛1* ,李全利2,史艳华3,梁平3   

  1. (1.内蒙古科技大学材料与冶金学院,内蒙古包头014010;2.中油集团长城钻探工程有限公司物资分公司,北京100101;
    3.辽宁石油化工大学机械工程学院,辽宁抚顺113001
  • 作者简介:陈思瑶(1989-),女,辽宁锦州市,在读硕士

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Abstract:  

The lab simulation test of corrosion behavior of Q345 steel in soil contaminated by lead was investigated as time proceeds. The corrosion morphology, corrosion products, chargetransfer resistance and electric current density of Q345 steel were studied by SEM, XRD and electrochemical measurement technology. The experimental results showed that local corrosion and corrosion pits occur at the initial stage, and then with the increase of immersion time, the corrosion forms turn to general corrosion and pitting corrosion. At the initial stage, it could form homogeneous corrosion product film in the sample surface, which had protection effect for matrix, but with the immersion time increases, the corrosion film thicken and fall off. The electrochemical measurement technology research showed that the chargetransfer resistance increased with the time, but decreased suddenly three weeks later and the protective capability of film got weak.

Key words: Lead pollution ,  Sewage water irrigation region ,  Q345 steel ,  Lab simulation test ,  Corrosion behavior

摘要： 采用室内模拟实验的方法,研究了Q345钢在铅污染土壤中不同时间的腐蚀行为。利用SEM、XRD
和电化学测试技术分别研究了Q345钢腐蚀后的形貌、腐蚀产物组成、电荷转移电阻和腐蚀电流密度变化规律。实
验结果表明:在腐蚀初期发生局部腐蚀出现腐蚀坑,随时间的延长,其腐蚀形式转变为全面腐蚀加点蚀,腐蚀初期在
金属表面形成一层均匀的腐蚀产物膜,对基体起到保护的作用,但随着浸泡时间延长,腐蚀产物膜增厚且有脱落的
趋势。电化学测试结果表明:随着时间的延长电荷转移电阻增大,但第3周时突然降低使其保护性降低。

关键词: 铅污染 , 污灌区 , Q345钢 , 室内模拟实验 , 腐蚀行为

Cite this article

CHEN Siyao, LI Tao, LI Quanli, SHI Yanhua, LIANG Ping.  

Corrosion Behavior of Q345 Steel in Soil Contaminated by Lead
[J]. Journal of Liaoning Petrochemical University, 2013, 33(4): 70-73.

陈思瑶,李涛,李全利,史艳华,梁平. Q345钢在铅污染土壤中的腐蚀行为研究[J]. 辽宁石油化工大学学报, 2013, 33(4): 70-73.

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