均匀化退火对新型Cu-Ni-Al合金耐蚀性能的影响  

Effect of homogenization annealing on corrosion resistance of new Cu-Ni-Al alloy

作　　者：宋正成 贾淑果[1,2] 周延军 宋克兴[1,2] 米绪军 李周[4] 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)

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]有色金属共性技术河南省协同创新中心,河南洛阳471023 [3]北京有色金属研究总院,北京100088 [4]中南大学材料科学与工程学院,湖南长沙410006

出　　处：《材料热处理学报》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)

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.

关 键 词：新型Cu-Ni-Al合金 耐蚀性 均匀化退火 

分 类 号：TG146.1[一般工业技术—材料科学与工程]