Journal of South China University of Technology(Natural Science Edition) ›› 2018, Vol. 46 ›› Issue (7): 39-46.doi: 10.3969/j.issn.1000-565X.2018.07.006

• Materials Science & Technology • Previous Articles     Next Articles

Atmospheric Corrosion Behavior of Q235 Steel Exposed on Transmission Tower Sites of Guangdong Province

 GAO Yan 1 HUANG Yinhui 1 ZHENG Zhijun2 MENG Xiaobo 3 LIAO Yongli 3 LI Ruihai 3   

  1.  1． School of Materials Science and Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China; 2． School of Mechanical and Automotive Engineering，South China University of Technology，Guangzhou 510640，Guangdong， China; 3． Electric Power Ｒesearch Institute，CSG，Guangzhou 510080，Guangdong，China
  • Received:2017-09-28 Revised:2017-10-18 Online:2018-07-25 Published:2018-06-01
  • Contact: 高岩( 1962-) ，女，博士，教授，主要从事大气腐蚀、纳米材料制备与表征等研究 E-mail:meygao@scut.edu.cn
  • About author:高岩( 1962-) ，女，博士，教授，主要从事大气腐蚀、纳米材料制备与表征等研究
  • Supported by:
     Supported by the National Natural Science Foundation of China( 51471072) 

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Abstract: : The atmospheric corrosion behavior of Q235 steel used as the transmission tower material was investigated systematically in the 10 representative transmission lines of four typical atmospheric environments ( urban，industrial，marine and rural) by field exposure in Guangdong Province for one year． The period for recapturing samples from the field station lasted 6 and 12 months respectively． Their corrosion weight losses in unit area were measured to investigate the corrosion rule of Q235 steel． X-ray diffraction ( XＲD) and scanning electron microscopy ( SEM) were applied to analyze the microstructure and morphology of the corrosion products respectively． Ｒesults suggested that the atmospheric corrosion grade of a large part of Guangdong Province belongs to C3 and other parts belong to C2，a moderate rank as a whole． The influence of different environments on the atmospheric corrosion is different as follows: the heavy industrial environment，the compound one of marine and light industry，the marine and urban one，the little city and rural one． The corrosion rate of Q235 in the previous 6 months is obviously higher than that in the latter stage from 6 to 12 months in one-year-field exposure． The corrosion products are mainly αFeOOH and γ-FeOOH with net-or needle-like micro morphology，and a small amount of β-FeOOH is observed in the marine environment

Key words: transmission tower, Q235 steel, atmospheric corrosion behavior, corrosion weight loss, corroion grade

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