摘要
采用电化学和动态失重法测定稀土低镍铬铸铁在高温烧碱中的阳极极化曲线和腐蚀速度 ,借助显微镜和扫描电镜观察显微组织和腐蚀形貌 ,结果表明 ,加入稀土可细化低镍铬铸铁组织并改变石墨形态 ,提高耐高温烧碱腐蚀性能。其中DNJ3(0 0 4 6 %RE)腐蚀速度最小 ,维钝电流低 ,钝化区间长 ,是一种优良的耐碱蚀材料。
The corrosion rate and anode polarization curves of Ni Cr cast iron in high temperature caustic soda solution had been determined with the aid of weigh less measurement and electrochemical methods.Microstructure and corrosion surface shape had been examined by means of OM and SEM.The results showed that microstructure of Ni Cr cast iron was fined and the corrosion resistance of it was enhanced by the addition of proper content of rare earth.The best of them was DNJ3(0 046%RE)becaue it′s corrosion speed was minimum and it′s passivity properties was better satisfactory.
出处
《铸造》
EI
CAS
CSCD
北大核心
2000年第3期148-151,共4页
Foundry
基金
国家自然科学基金!资助项目 (5 936 10 0 1)
关键词
稀土
低镍铬铸铁
高温烧碱
耐蚀铸铁
Rare Earth
Nickel Chromium alloy cast iron
high temperature caustic soda solution
corrosion resistance cast iron
