Effect of Ag addition on the microstructure and corrosion properties of Sn-9Zn lead-free solder

被引：12
作者：
Pu, Cunji [1 ,2 ]
Li, Caiju [1 ,2 ]
Dong, Tinghao [1 ,2 ]
Miao, Yingde [1 ,2 ]
Gao, Peng [1 ,2 ]
Zhang, Xin [3 ]
Peng, Jubo [4 ]
Yi, Jianhong [1 ,2 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Mat Sci & Engn, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, Yunnan Engn Res Ctr Met Powder Mat, Kunming 650093, Peoples R China
[3] Yunnan Tin Grp Holding Co Ltd, Yunnan Tin New Mat Co LTD, Kunming 650501, Peoples R China
[4] Yunnan Tin Grp Holding Co Ltd, Kunming 650299, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 27卷
基金：
中国国家自然科学基金;
关键词：
Sn-Zn-Ag alloy; Microstructure; Electrochemical technology; Corrosion mechanism; Passive films; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; SN-ZN ALLOYS; HIGH-TEMPERATURE; WORK FUNCTION; GA SOLDER; BEHAVIOR; FILMS; PB; KINETICS; STEELS;
D O I：
10.1016/j.jmrt.2023.11.123
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of Ag addition on the microstructure of Sn-9Zn alloy and its corrosion behaviour in neutral and static 3.5 wt% NaCl solutions were investigated using surface characterization techniques and electrochemical techniques. The results show that in Sn-9Zn-xAg alloys, Ag reacts with Zn to form AgZn3 intermetallic compounds (IMCs), which refined the microstructure of the alloys and changed the corrosion mode of the alloy surfaces from pitting corrosion to surface corrosion. The addition of Ag effectively improved the corrosion passivation film structure and electron transfer characteristics of the alloy, increased the self-corrosion potential (Ecorr) and reduced the self-corrosion current (Icorr), thus improving the corrosion resistance of the alloy. The study explained and verified the corrosion mechanism of the alloy from both experimental and theoretical perspectives. It is concluded that Sn-9Zn-0.4Ag alloy shows relatively the best corrosion resistance.
引用
收藏
页码：6400 / 6411
页数：12
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