摘要
核电用冷凝器的失效形式以腐蚀为主。利用电化学测试系统、XRD、OM、SEM和EDS等分析测试方法研究Cu-30Ni-XRE（X=0-0.213）合金耐腐蚀性能及其机理。结果表明,与不含稀土的Cu-30Ni合金相比,适量稀土添加的Cu-30Ni-0.095RE合金的Ni元素偏析降低,枝晶和晶间腐蚀驱动力减小,导致腐蚀电位Ec提高约11.0%,腐蚀电流密度ic降低约37.3%。
The corrosion resistance for Cu-30Ni-XRE（X=0-0.213） alloy and its mechanism were investigated by electrochemical testing, X-ray diffraction, optical microscopy, scanning electrical microscopy and energy disperse spectroscopy. The results show that compared with Cu-30Ni alloy without RE, proper amount RE decreases composition segregation of Ni element for the Cu-30Ni-0.095RE alloy, thus deceasing the corrosion driving force between centre of dendrite and interdendritic. As a result, for Cu-30Ni-0.095RE alloy the corrosion potential increases by 11.0%, and the corrosion current density decreases by 37.3%.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第5期1349-1352,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金-青年科学基金(51301086)
江苏省自然科学基金-青年基金(BK20130738)
