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H2SO3对X70钢在弱酸性溶液中的腐蚀行为的影响

郭红1,2;何晓英2   

  1. 1. 山东理工大学分析测试中心,山东淄博255049;2. 西华师范大学化学化工学院,四川南充637002
  • 收稿日期:2206-08-14 修回日期:1900-01-01 出版日期:2007-10-24 发布日期:2007-10-24
  • 通讯作者: 郭红

Effects of H2SO3 on the corrosion behavior of X70 steel in weak acid solutions

GUO Hong1,2;HE Xiao-ying2   

  1. 1. Analysis & Testing Center,Shandong University of Technology,Zibo 255049,China;2. Department of Chemistry,China West Normal University,Nanchong 637002,China
  • Received:2206-08-14 Revised:1900-01-01 Online:2007-10-24 Published:2007-10-24
  • Contact: GUO Hong

摘要: 用静态失重法、动电位扫描法、交流阻抗法结合扫描电镜、X射线能谱分析研究了H2SO3对X70钢在弱酸性溶液中的腐蚀行为的影响. 结果表明,随H2SO3浓度的增大, X70钢在弱酸性溶液中的腐蚀深度逐渐增大,电荷转移电阻依次减小,自腐蚀电流逐渐增大,自腐蚀电位先负移后正移. 当HAc-NaAc缓冲溶液中含有H2SO3时,X70钢在活性溶解过程中形成了吸附性中间产物Fe(HSO3)ad.

关键词: H2SO3, X70钢, 腐蚀

Abstract: The corrosion behavior of X70 steel in weak acidic solutions with various concentrations of H2SO3 was studied by means of the static weight loss method, potentiodynamic polarization curves, electrochemical impendence spectroscopy, scanning electron microscopy and energy dispersive X-ray analysis. The results show that with increasing H2SO3 concentration, the corrosion depth of X70 steel gradually increases, the charge transmite impendence decreases in turn, the corrosion current gradually increased, and the corrosion potential became first negative and then positive. The adsorptive mediate product is Fe(HSO3)ad in the process of dissolution of X70 steel in an HAc-NaAc system with H2SO3.

Key words: H2SO3, X70 steel, corrosion

中图分类号: 

  • TG17
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