摘要
采用电化学"二电极"方法,定期测定了沥青和喷锌(130 g/m2)球墨铸铁管在5 g/LNaCl溶液中电位的变化规律,并观察记录试样损伤处首次出现红锈的时间及形貌演变。结果表明:铁的保护电位为-0.780 V,试样电位高于-0.780 V即有红锈出现;相对于沥青涂层,喷锌层对铸铁管防腐蚀提供了有效的阴极保护及自愈合保护,能使首次红锈出现的时间显著延迟。
Bitumen painted and zinc coated(130 g/m2) ductile cast iron pipe samples with damages were immersed in 5 g/L NaCl solution,the evolution of the electrochemical potential of the samples was measured periodically using electrochemical "two-electrodes" technique,and the time to first red rusting and the morphology evolution of the damaged area were recorded.The results indicate that the protective potential of iron is-0.780 V above which red rusting will appear.Compared to bitumen painting,zinc coati...
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第11期76-79,共4页
Materials For Mechanical Engineering
基金
江苏省高新技术产业化资助项目(JH01-071)
关键词
球墨铸铁
喷锌
自愈合
ductile cast iron
zinc coating
self-healing
