无铅焊料在NaCl-Na2SO4-Na2CO3模拟土壤溶液中的腐蚀浸出行为

中国腐蚀与防护学报

2011, Vol. 31

Issue (5): 381-384

研究报告

本期目录 | 过刊浏览

无铅焊料在NaCl-Na₂SO₄-Na₂CO₃模拟土壤溶液中的腐蚀浸出行为

王丽华,程从前,杨芬,赵杰

大连理工大学材料学院大连 116085

LEACHING BEHAVIOR OF LEAD-FREE SOLDERS IN A NaCl-Na₂SO₄-Na₂CO₃ MIXED SOLUTION AS SIMULATED SOIL

WANG Lihua, CHENG Congqian, YANG Fen, ZHAO Jie

School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085

全文: PDF(1058 KB)

摘要: 研究了Sn-3.5Ag-0.75Cu和Sn-0.75Cu焊料合金在 NaCl-Na₂SO₄-Na₂CO₃模拟土壤溶液中的腐蚀浸出行为，并与Sn-37Pb焊料合金的腐蚀浸出行为对比分析。研究表明，这3种焊料合金中Sn的浸出量随时间的延长趋于平缓，且Sn-0.75Cu焊料合金中Sn的浸出量最高，添加Ag元素后明显抑制了Sn-3.5Ag-0.75Cu焊料合金中Sn的浸出；Ag，Cu，Pb的浸出量随时间的延长呈线性增加，且Ag，Cu的浸出量较少。3种焊料合金浸出后表面产物层较厚，主要由 Sn₄(OH)₆Cl₂和SnO组成，其中Sn-0.75Cu焊料合金的表面产物层有裂纹和孔洞，Sn-3.5Ag-0.75Cu焊料合金的表面产物相对致密，而Sn-37Pb焊料合金的表面产物局部出现剥落现象。这3种焊料合金浸出动力学行为存在差异，主要与表面产物的相组成和形貌有关。

关键词 ：无铅焊料, NaCl-Na₂SO₄-Na₂CO₃混合溶液, 浸出动力学

Abstract：Leaching behavior of Sn-3.5Ag-0.75Cu and Sn-0.75Cu lead-free solder alloys in a NaCl-Na₂SO₄-Na₂CO₃ mixed solution as simulated soil was investigated and compared with that of Sn-37Pb alloy. The results showed that leaching amount of Sn from the three solders increased with reaction period. The most leaching amount of Sn was found for Sn-0.7Cu solder alloy. However, Sn leached from Sn-3.5Ag-0.75Cu solder alloy was depressed by adding Ag element. The leaching amount of Ag, Cu and Pb elements also increased linearly with increasing time. However, the relatively less amount of leached Ag and Cu was measured. The product on the leached solder alloy surface was identified as Sn₄(OH)₆Cl₂ and SnO. Many cracks and pits were found in the product on Sn-0.75Cu alloy surface, while the product layer on Sn-3.5Ag-0.75Cu alloy was rather compact. For Sn-37Pb alloy, some product had spalled from the surface. Based on the experimental results, it was supposed that the phase formation and morphology of surface product were responsible for the difference of leaching kinetics for these three solder alloys.

Key words： lead-free solder alloys NaCl-Na₂SO₄-Na₂CO₃ mixed solution leaching kinetics morphology phase composition

收稿日期: 2010-07-21

ZTFLH:

TG172

基金资助:

国家科技基础条件平台建设项目(2005DKA10400-Z23)和中央高校基本科研业务专项资助

通讯作者: 赵杰 E-mail: jiezhao@dlut.edu.cn

Corresponding author: ZHAO Jie E-mail: jiezhao@dlut.edu.cn

作者简介: 王丽华，女，1985年，硕士生，研究方向为无铅焊料合金中重金属元素的浸出行为

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引用本文:

王丽华,程从前,杨芬,赵杰. 无铅焊料在NaCl-Na₂SO₄-Na₂CO₃模拟土壤溶液中的腐蚀浸出行为[J]. 中国腐蚀与防护学报, 2011, 31(5): 381-384.
YU Li-Hua. LEACHING BEHAVIOR OF LEAD-FREE SOLDERS IN A NaCl-Na₂SO₄-Na₂CO₃ MIXED SOLUTION AS SIMULATED SOIL. J Chin Soc Corr Pro, 2011, 31(5): 381-384.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2011/V31/I5/381

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