Corrosion insight of iron and bismuth added Sn–1Ag–0.5Cu lead-free solder alloy

Subri, Nor Wahida and Sarraf, Masoud and Nasiri-Tabrizi, Bahman and Ali, Bakhtiar and Sabri, Mohd Faizul Mohd and Basirun, Wan Jefrey and Sukiman, Nazatul Liana (2020) Corrosion insight of iron and bismuth added Sn–1Ag–0.5Cu lead-free solder alloy. Corrosion Engineering, Science and Technology, 55 (1). pp. 35-47. ISSN 1478-422X, DOI

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The present study attempted to assess the corrosion performance of iron (Fe) and bismuth (Bi) added Sn–1Ag–0.5Cu (SAC105) lead-free solder alloy in NaCl-based solutions. Potentiodynamic polarisation measurements indicated that in acidic or alkaline solutions, corrosion potential (Ecorr) shifted to more negative (active) values and the corrosion current density (icorr) visibly increased. In a neutral pH solution, SAC105 solder alloys exhibited notable corrosion resistance owing to the stability of passive film formed on the surface of solder alloys. Potentiodynamic polarisation curves also showed that the addition of 0.05 wt% Fe and 1 wt% Bi improved the corrosion rate of SAC105 and lowered the Ecorr towards more noble value due to the reduced micro-galvanic interaction between the cathodic Ag3Sn IMCs and the anodic Sn matrix. Immersion tests revealed that the mass loss increased in the order: SAC105–Fe–2Bi > SAC105 > SAC105–Fe–1Bi. © 2019, © 2019 Institute of Materials, Minerals and Mining Published by Taylor & Francis on behalf of the Institute.

Item Type: Article
Funders: University of Malaya Research Grant (grant number of RP032C-15AET), Fundamental Research Grant Scheme (grant number of FP055-2015A)
Uncontrolled Keywords: Sn–1Ag–0.5Cu; pH effect; Fe/Bi addition; microstructural features; corrosion behaviour
Subjects: Q Science > QD Chemistry
T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Engineering
Faculty of Science > Department of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 17 Jun 2020 01:50
Last Modified: 17 Jun 2020 01:50

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