Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8002035 | Journal of Alloys and Compounds | 2014 | 10 Pages |
Abstract
The corrosion properties of Sn-9Zn lead-free solder was studied through potentiodynamic polarization in 6Â M potassium hydroxide at different scanning rates. The corrosion rates of Sn-9Zn solder remained nearly constant at 2.1Â ÃÂ 10â4Â AÂ cmâ2 from scan rates of 2.0Â mVÂ sâ1 to 3.5Â mVÂ sâ1 before significantly increasing as the rates increased to higher than 3.5Â mVÂ sâ1. The morphological analysis showed that two distinctive structures of a lamellar-like groove and irregularly shaped corrosion product compounds co-existed on the solder surface after being polarized at different rates. In addition, phase and elemental analyses revealed the formation of mixed corrosion products of SnO, SnO2, and ZnO on the surface after polarization. Moreover, the ultimate tensile stress endured by the solder joint decreased by 26% after polarization.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Muhammad Firdaus Mohd Nazeri, Ahmad Badri Ismail, Ahmad Azmin Mohamad,