Comparative Study of Corrosion Behavior of AA2014/15 Vol%Al₂o₃p and AA2009/20 Vol% SiCw

 

 

S.B. Jamaludin,*Z. Yusoff,  K.R. Ahmad

 

School of Materials Engineering, University Malaysia Perlis, Kompleks Pusat Pengajian 2, Taman Muhibbah, Jejawi, 02600 Arau, Perlis, Malaysia

 

Received 26 September 2007; accepted 8 November 2007

 

 

 

Abstract

The influence of heat treatment on the corrosion behavior of two aluminium matrix composites (AA2014/15 vol% Al₂O₃p - composite A and AA2009/20 vol% SiCw -composite B) was analyzed in 3.5% sodium chloride solution. The kinetic of the corrosion process was studied based on the gravimetric measurements. The corrosion damage and pit shape were analyzed by Image Analyzer. The corrosion damage in both composites was caused by the pitting attack on the surface. Pit shape of the composite A is different to the composite B. The corrosion rate of composite A is higher than composite B because the voids or gap between reinforcement particles and matrix are larger than in the composite B. The main attack of nucleation sites was at the interface region of the matrix and the reinforcement.

Keywords: aluminum matrix composite, corrosion, heat treatment.

 

 

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*Corresponding author. E-mail address: sbaharin@unimap.edu.my