{"title":"无铅焊料的电化学腐蚀行为","authors":"C. Tsai, Jenn-Ming Song, Yen‐Pei Fu","doi":"10.1109/IMPACT.2009.5382213","DOIUrl":null,"url":null,"abstract":"This study aimed to investigate the electrochemical corrosion behavior of the potential Pb-free solders, Bi-11wt%Ag and Zn-40wt%Sn, in 3.5% NaCl solution using the potentiodynamic polarization method with the scanning range from -2000mV to +2000mV. Pb-5wt%Sn alloy was also examined for comparison. Experimental results show that the corrosion potential (Ecorr) decreased in the decreasing order was Bi-11Ag, Pb-5Sn, and Zn-40Sn. Zn-40Sn exhibited the highest current density (Icorr), and that for Pb-5Sn was the lowest. The Pb-5Sn samples had a much extended passive region compared to Bi-11Ag, while the Zn-40Sn samples showed no passive behavior within the scanning range. According to the XPS and XRD data, the corrosion products were main PbCl2 and PbO for Pb-5Sn, BiOCl, AgCl2, and Bi2O3 for Bi-11Ag. Zn rich phases (ZnO and ZnCl2) were found on the polarized surface of Zn-40Sn, and tin oxides were detected at the subsurface.","PeriodicalId":6410,"journal":{"name":"2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference","volume":"41 1","pages":"448-451"},"PeriodicalIF":0.0000,"publicationDate":"2009-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Electrochemical corrosion behavior of Pb-free solders for die attachment\",\"authors\":\"C. Tsai, Jenn-Ming Song, Yen‐Pei Fu\",\"doi\":\"10.1109/IMPACT.2009.5382213\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This study aimed to investigate the electrochemical corrosion behavior of the potential Pb-free solders, Bi-11wt%Ag and Zn-40wt%Sn, in 3.5% NaCl solution using the potentiodynamic polarization method with the scanning range from -2000mV to +2000mV. Pb-5wt%Sn alloy was also examined for comparison. Experimental results show that the corrosion potential (Ecorr) decreased in the decreasing order was Bi-11Ag, Pb-5Sn, and Zn-40Sn. Zn-40Sn exhibited the highest current density (Icorr), and that for Pb-5Sn was the lowest. The Pb-5Sn samples had a much extended passive region compared to Bi-11Ag, while the Zn-40Sn samples showed no passive behavior within the scanning range. According to the XPS and XRD data, the corrosion products were main PbCl2 and PbO for Pb-5Sn, BiOCl, AgCl2, and Bi2O3 for Bi-11Ag. Zn rich phases (ZnO and ZnCl2) were found on the polarized surface of Zn-40Sn, and tin oxides were detected at the subsurface.\",\"PeriodicalId\":6410,\"journal\":{\"name\":\"2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference\",\"volume\":\"41 1\",\"pages\":\"448-451\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IMPACT.2009.5382213\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 4th International Microsystems, Packaging, Assembly and Circuits Technology Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IMPACT.2009.5382213","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Electrochemical corrosion behavior of Pb-free solders for die attachment
This study aimed to investigate the electrochemical corrosion behavior of the potential Pb-free solders, Bi-11wt%Ag and Zn-40wt%Sn, in 3.5% NaCl solution using the potentiodynamic polarization method with the scanning range from -2000mV to +2000mV. Pb-5wt%Sn alloy was also examined for comparison. Experimental results show that the corrosion potential (Ecorr) decreased in the decreasing order was Bi-11Ag, Pb-5Sn, and Zn-40Sn. Zn-40Sn exhibited the highest current density (Icorr), and that for Pb-5Sn was the lowest. The Pb-5Sn samples had a much extended passive region compared to Bi-11Ag, while the Zn-40Sn samples showed no passive behavior within the scanning range. According to the XPS and XRD data, the corrosion products were main PbCl2 and PbO for Pb-5Sn, BiOCl, AgCl2, and Bi2O3 for Bi-11Ag. Zn rich phases (ZnO and ZnCl2) were found on the polarized surface of Zn-40Sn, and tin oxides were detected at the subsurface.
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