Effect of Different Ga Contents on the Acid and Alkaline Resistance of New SnInAg Lead-Free Solder Alloy

REN Pengkai, XU Dongxia, CAO Fulei, CHU Yadong, ZHANG Hongxia

doi:10.16577/j.issn.1001-1560.2024.0098

Materials Protection >

2024 , Vol. 57 >Issue 5: 25 - 32

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0098

Effect of Different Ga Contents on the Acid and Alkaline Resistance of New SnInAg Lead-Free Solder Alloy

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(1. School of Materials Science and Engineering，Henan Polytechnic University，Jiaozuo 454003，China；2. Engineering Research Center for Structural and Functional Metal Matrix Composites in Henan Province，Jiaozuo 454003，China；3. Ningbo Boway Alloy Material Co.，Ltd.，Ningbo 315000，China；4. Luoyang LandGlass Machinery Co.，Ltd.，Luoyang 471000，China)

XU Dongxia，Ph.D.，Associate Professor，Research Focus: Electronic Packaging Materials，E-mail: xudongxia@hpu.edu.cn26

Received date: 2023-09-28

Revised date: 2023-12-02

Accepted date: 2023-12-20

Online published: 2024-05-31

Supported by

Industry -Academic -Research Cooperation Projects of Henan Province (Research of Solders and Key Technology for Sealing Vacuum Glass in Low Temperature - 152107000077)

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Abstract

In order to improve the corrosion resistance of Sn-11In-1.5Ag lead-free solder alloy solder, the corrosion behavior of Sn-11In-1.5Ag-xGa(x=0, 0.1, 0.3, 0.5, 0.7, mass fraction, %) solder alloy in a corrosive environment was studied by weight loss method and electrochemical experiments. In addition, the surface morphologies of Sn-11in-1.5Ag-xGa solder alloy were observed by scanning electron microscopy(SEM), and the corrosion products on the solder surface were characterized by X-ray diffraction(XRD). Results showed that whether in acidic or alkaline solutions, the addition of Ga could improve the corrosion resistance of Sn-11In-1.5Ag solder alloy. With the increase of Ga content, the corrosion resistance of solder was enhanced. For solder alloys with the same composition, their corrosion resistance in alkaline solution was better than that in acid solution. Besides, SEM observation showed that adding Ga into Sn-11In-1.5Ag alloy could significantly reduce the corrosion degree of solder, and XRD analysis disclosed that the corrosion products of solder alloys in acidic and alkaline solutions were the same, both of which were In₂O₃.

Key words： lead -free solder; Sn -In -Ag alloy; Ga; corrosion resistance

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REN Pengkai, XU Dongxia, CAO Fulei, CHU Yadong, ZHANG Hongxia . Effect of Different Ga Contents on the Acid and Alkaline Resistance of New SnInAg Lead-Free Solder Alloy[J]. Materials Protection, 2024 , 57(5) : 25 -32 . DOI: 10.16577/j.issn.1001-1560.2024.0098

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