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。
The effect of F^-, Cl^- and (NH4)2SO4 on the corrosion of Q235 carbon steel in ammoniabased 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.
作者
付志浩
徐佳欢
汪丹
谢刚
卢皓
连洲洋
周永璋
魏无际
FU Zhihao;XU Jiahuan;WANG Dan;XIE Gang;LU Hao;LIAN Zhouyang;ZHOU Yongzhang;WEI Wuji(College of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China;College of Energy Science and Engineering,Nanjing Tech University,Nanjing 211816,China)
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2019年第5期521-525,共5页
Corrosion Science and Protection Technology
基金
国家自然科学基金(21676144)~~
关键词
氨法脱硫浆液
Q235碳钢
F^-
Cl^-
硫酸铵
腐蚀
ammonia desulfurization slurry
Q235 carbon steel
fluoride ion
chloride ion
ammonium sulfate
corrosion
