Er对海工5052铝合金腐蚀行为的影响  

Effect of Er on Corrosion Behavior of Marine Engineering 5052 Al-alloy

作　　者：张欣[1] 林木烟 杨光恒 王泽华[1] 邵佳[1] 周泽华[1] ZHANG Xin;LIN Muyan;YANG Guangheng;WANG Zehua;SHAO Jia;ZHOU Zehua(College of Mechanics and Materials,Hohai University,Nanjing 211100,China;School of Materials Science and Engineering,Zejiang University,Hangzhou 315100,China)

机构地区：[1]河海大学力学与材料学院,南京211100 [2]浙江大学材料科学与工程学院,杭州315100

出　　处：《中国腐蚀与防护学报》2021年第5期686-690,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(51909071);江苏省自然科学基金(BK20190493);中央高校基本科研业务费专项(B200202133)。

摘　　要：通过浸泡实验和电化学实验测试了稀土元素Er对海洋工程常用5052铝合金腐蚀行为的影响,通过光学显微镜(OM)、扫描电子显微镜(SEM)、能谱分析仪(EDS)观察腐蚀前后合金微观组织形貌与分析腐蚀产物成分。结果表明:随着5052铝合金中稀土Er加入量的增加,合金耐蚀性先升高后降低,Er加入量为0.4%时合金耐蚀性最好。适量Er的加入能够提高5052铝合金的耐蚀性,但过量Er的加入会导致合金耐蚀性大幅度降低。The effect of Er addition on the corrosion behavior of 5052 Al-alloy were investigated by means of electrochemical measurement and immersion test.as well as optical microscope(OM),scanning electron microscope(SEM)and energy disperse spectroscopy(EDS).The results indicated that with the increase of Er addition,the corrosion resistance of 5052 Al-alloy increased first,and then decreased.Among others,the 5052 Al-alloy with 0.4%Er addition had the best corrosion resistance.It is obvious that,a proper amount of Er addition could improve the corrosion resistance of 5052 Al-alloy effectively,whereas the excessive Er addition would increase the corrosion rate and reduce the corrosion resistance.

关 键 词：5052铝合金 稀土Er 腐蚀行为 点蚀 

分 类 号：TG174[金属学及工艺—金属表面处理]