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Int. J. Electroactive Mater. 3 (2015) 28-32

Polarization Study of Sn-9Zn and Sn-37Pb Solders in Hydrochloric Acidic Solution

Mohd Naim Mohamed1, Noraliza Ab Aziz1, Muhammad Firdaus Mohd Nazeri2*, Ahmad Azmin Mohamad3

1School of Materials Engineering, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
2Materials Engineering, Universiti Malaysia Perlis, Arau, Perlis, Malaysia
3School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia

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Abstract : The corrosion behavior of Sn-9Zn and Sn-37Pb solders were compared by means of potentiodynamic polarization in 1 M hydrochloric acid solution. Two dissolution peaks were observed for Sn-9Zn reveals that preferential dissolution process was dominant during polarization, compared with Sn-37Pb. Post-corrosion analyses show that porous and poor distribution of passivation film made of different phase of corrosion products completely replaced the original microstructures of Sn-9Zn and Sn-37Pb. This shows that continuous protection offered by the presence of corrosion product is insufficient to stop further corrosion attack.

Keywords : Corrosion,Sn-9Zn,Sn-37Pb,Potentiodynamic polarization,Hydrochloric acid,