Corrosion characterization of tin–lead and lead-free solders in 3.5 wt.% NaCl solution

Li, Dezhi; Conway, Paul; Liu, Changqing

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Corrosion characterization of tin–lead and lead-free solders in 3.5 wt.% NaCl solution

journal contribution

posted on 2013-10-31, 09:36 authored by Dezhi Li, Paul ConwayPaul Conway, Changqing Liu

The corrosion resistance of Sn-Pb and several candidate lead free solders were investigated in 3.5wt.% NaCl solution through potentiodynamic polarisation. Results showed that in NaCl solution lead free solders had better corrosion resistance than Sn- Pb solder and the corrosion resistance of lead free solders was similar, but the corrosion resistance of Sn-Ag solder was better than that of Sn-Ag-Cu and Sn-Cu solders. The corrosion products for Sn-Pb solder had a two-layered structure with Sn-rich phases at the outer layer and looser Pb-rich phases at the inner layer. The loose Pb-rich layer was detrimental to the corrosion property. The corrosion product on the surface of all these solders was tin oxide chloride hydroxide.

History

School

Mechanical, Electrical and Manufacturing Engineering

Citation

LI, D., CONWAY, P.P. and LIU, C., 2008. Corrosion characterization of tin–lead and lead-free solders in 3.5 wt.% NaCl solution. Corrosion Science, 50 (4), pp.995-1004.

Publisher

Version

AM (Accepted Manuscript)

Publication date

2008

Notes

This is the author’s version of a work that was accepted for publication in Corrosion Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published at: http://dx.doi.org/10.1016/j.corsci.2007.11.025