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SnAgCu焊料中Sn元素在模拟土壤溶液中的浸出行为

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Indexed by:期刊论文

Date of Publication:2012-07-20

Journal:中国环境科学

Included Journals:Scopus、PKU、ISTIC、CSCD

Volume:32

Issue:7

Page Number:1314-1318

ISSN No.:1000-6923

Key Words:无铅焊料;接头;浸出行为;盐溶液;腐蚀

Abstract:研究了Sn-3.5Ag-0.75Cu无铅焊料及其与Cu基板的钎焊接头在模拟土壤的NaCl,NaCl-Na2SO4和NaCl-Na2SO4-Na2CO3溶液中Sn元素的浸出行为.结果表明:焊料在NaCl-Na2SO4-Na.2CO3溶液中Sn的浸出相对严重;而接头在NaCl溶液中Sn的浸出量最多.在Sn浸出量多的焊料和接头表面形成厚而疏松的腐蚀产物,RD分析表明其产物主要由SnO,SnO2和Sn4(OH)6Cl2组成.动电位极化测试分析表明接头中Cu基板与焊料合金之间的电偶腐蚀是焊料合金与接头在同种溶液中Sn元素浸出差异的主要原因.

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