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烟道气氨法脱硫液对Q235碳钢腐蚀研究
引用本文:付志浩,徐佳欢,汪丹,谢刚,卢皓,连洲洋,周永璋,魏无际. 烟道气氨法脱硫液对Q235碳钢腐蚀研究[J]. 腐蚀科学与防护技术, 2019, 31(5): 521-525. DOI: 10.11903/1002.6495.2019.029
作者姓名:付志浩  徐佳欢  汪丹  谢刚  卢皓  连洲洋  周永璋  魏无际
作者单位:南京工业大学环境科学与工程学院 南京211816;南京工业大学能源科学与工程学院 南京211816
摘    要:采用静态挂片、极化曲线和长期点蚀实验,研究了氨法脱硫浆液中F^-和Cl^-以及(NH4)2SO4对Q235碳钢腐蚀的影响。结果表明,Q235碳钢在含卤硫铵溶液中的均匀腐蚀速率随F^-浓度和Cl^-浓度增大均呈现先降低后增高的趋势,随着(NH4)2SO4质量分数增加,均匀腐蚀速率降低;随着F^-浓度的增大,自腐蚀倾向增加;随着Cl^-浓度以及(NH4)2SO4质量分数的增大,自腐蚀倾向均降低;Q235碳钢在氨法脱硫模拟浆液中点蚀较严重,需采取重防腐措施。

关 键 词:氨法脱硫浆液  Q235碳钢  F^-  Cl^-  硫酸铵  腐蚀
收稿时间:2019-01-26

Corrosion of Q235 Carbon Steel in Ammonia-based Flue Gas Desulfurization Slurry
FU Zhihao,XU Jiahuan,WANG Dan,XIE Gang,LU Hao,LIAN Zhouyang,ZHOU Yongzhang,WEI Wuji. Corrosion of Q235 Carbon Steel in Ammonia-based Flue Gas Desulfurization Slurry[J]. Corrosion Science and Protection Technology, 2019, 31(5): 521-525. DOI: 10.11903/1002.6495.2019.029
Authors:FU Zhihao  XU Jiahuan  WANG Dan  XIE Gang  LU Hao  LIAN Zhouyang  ZHOU Yongzhang  WEI Wuji
Affiliation:(College of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China;College of Energy Science and Engineering,Nanjing Tech University,Nanjing 211816,China)
Abstract:The effect of F-, Cl- and (NH4)2SO4 on the corrosion of Q235 carbon steel in ammonia-based flue gas desulfurization slurry was studied by means of static immersion test, polarization curve measurement and long-term pitting corrosion test. The results showed that the uniform corrosion rate of Q235 steel in the halogen-containing ammonium sulphate slurry decreased first and then increased with the increase of F- and Cl- concentration. As the content of (NH4)2SO4 increased, the uniform corrosion rate decreased. The corrosion tendency of the steel increased with the increase of F- concentration, and decreased with the increase of Cl- concentration and the content of (NH4)2SO4. The pitting corrosion of Q235 carbon steel in ammonia desulfurization simulation slurry is serious, and therefore, heavy anti-corrosion measures are needed.
Keywords:ammonia desulfurization slurry  Q235 carbon steel  fluoride ion  chloride ion  ammonium sulfate  corrosion  
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