摘要
为了提升2A14铝合金耐局部腐蚀性能,采用扫描电镜(SEM)、点蚀测试、循环阳极极化曲线(Tafel)和电化学阻抗谱(EIS)等分析测试方法,研究了Cu含量对2A14铝合金锻件显微组织和腐蚀性能的影响.结果表明:随着Cu含量降低,诱导点蚀的Al2Cu和AlCuMgSi残余结晶相体积分数减小,点蚀坑密度显著降低,合金抗点蚀性能和电化学腐蚀性能大幅提高.
In order to elevate the localized corrosion resistance of2A14aluminum alloy,the effect of Cu content on the microstructure and corrosion-resistance properties of2A14aluminum alloy forgings was investigated by using scanning electron microscopy(SEM),pitting corrosion tests,cyclic anodic polarization curves(Tafel)and electrochemical impedance spectroscopy(EIS).The results showed that the volume fraction of coarse Al2Cu and AlCuMgSi residual crystalline phase which induced pitting in2A14aluminum alloy matrix was reduced with the decrease of Cu content.The pitting density decreased significantly,the resistance to pitting properties and electrochemical corrosion properties was greatly improved due to the reduction of the constituents.
作者
陈送义
李际宇
王习峰
余芳
刘强
陈康华
CHEN Songyi;LI Jiyu;WANG Xifeng;YU Fang;LIU Qiang;CHEN Kanghua(Light Alloy Research Institute,Central South University,Changsha410083,China;Science and Technology on High Strength Structural Materials Laboratory,Central South University,Changsha410083,China;Collaborative Innovation Center of Advance Nonferrous Structural Materials and Manufacturing,Central South University,Changsha410083,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第12期29-37,共9页
Journal of Hunan University:Natural Sciences
基金
民用航天技术预先研究项目(B0109)
国家自然科学基金资助项目(U1637601)
国家自然科学基金重大科研仪器设备研制专项(51327902)
国家重点研发计划项目(2016YFB0300801)~~
关键词
2A14铝合金
CU含量
残余结晶相
腐蚀性能
2A14aluminum alloy
Cu content
residual crystalline phase
corrosion property
