摘要
在不同温度下对铸态新型Cu-Ni-Al合金进行均匀化退火,通过静态全浸试验、扫描电镜和电化学测试分析均匀化退火对新型Cu-Ni-Al合金耐蚀性能的影响。结果表明：新型Cu-Ni-Al合金的腐蚀速率随均匀化退火温度的升高而降低,在900-950℃间腐蚀速率趋向稳定;在850-950℃下均匀化退火,钝化现象明显,维钝电流密度较小,呈现良好的耐蚀性,但在850℃退火后合金的点蚀现象明显,对合金的耐蚀性不利;在900-950℃下均匀化退火后交流阻抗圆弧半径较大、电流密度较小,呈现较好的电化学特性,耐蚀性较好。
The effect of homogenization annealing at different temperatures on corrosion resistance of a new cast Cu-Ni-Al alloy was investigated by static full immersion test,scanning electron microscopy and electrochemical test. The results show that the corrosion rate of the new Cu-Ni-Al alloy decreases with the increasing of homogenization annealing temperature,and the corrosion rate tends to be stable at900-950 ℃. The new Cu-Ni-Al alloy has obvious phenomenon of passivation and shows good corrosion resistance at 850-950 ℃,after annealing at 850 ℃,the pitting corrosion of the alloy is obvious,which is unfavorable to the corrosion resistance of the alloy. After homogenization annealing at 900-950 ℃,the AC impedance arc radius is larger,the current density is smaller,the alloy exhibits better electrochemical characteristics and corrosion resistance.
作者
宋正成
贾淑果
周延军
宋克兴
米绪军
李周
SONG Zheng-cheng;JIA Shu-guo;ZHOU Yan-jun;SONG Ke-xing;MI Xu-jun;LI Zhou(School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China;Collaborative Innovation Center of Nonferrous Metals Henan Province, Luoyang 471023, China;Central Research Institute for Nonferrous Metals, Beijing 100088, China;School of Materials Science and Engineering, Central South University, Changsha 410006, China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第5期78-83,共6页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划(2016YFB0301400)
河南省基础与前沿技术研究项目(162300410049)
