摘要
针对亚铵法制浆造纸设备腐蚀的问题,采用三电极电化学研究法,金相组织分析法及重量法研究了造纸蒸球焊接热影响区在亚硫酸铵介质中的腐蚀行为.结果表明,温度升高和亚硫酸铵溶液浓度增大,均促使焊接热影响区的腐蚀速率增大;随着亚硫酸铵介质pH由酸性向碱性转变,极化体系中阳极区均出现钝化,其腐蚀速率减小;Q235钢用J420焊条焊接后,热影响区的组织特点决定了其耐蚀性较差.
The corrosion behavior of heat-affected zone of the weld seam of Q235 steel with J420 electrode in ammonium sulfite solution was researched, aiming at the serious corrosion of welding seam in the solution, by using electrochemical measurements and metallurgical microstructure analysis. The results showed that the corrosion rate of heat-affected zone was accelerated with increasing temperature and the concentration of ammonium sulfite solution. With the change of pH value of the solution from acidic to basic, the anodic areas of the heat-affected zone seem to be passivated, the corrosion rate was reduced. The poor corrosion resistance heat-affected zone was related with its microstructure after the Q235 steel was weld by J420 electrode.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2007年第4期300-303,共4页
Corrosion Science and Protection Technology
关键词
热影响区
亚硫酸铵
耐蚀性
显微组织
失重
heat-affected zone
ammonium sulfite
electrochemical corrosion
