EFFECT OF SiC AND Gr REINFORCEMENTS ON CORROSION RESISTANCE OF ALUMINIUM MATRIX COMPOSITES

摘要

The purpose of this study is to find the corrosion susceptibility of aluminium reinforced with SiC and graphite composites in a 3.5% NaCl solution. The electrochemical behaviour of the composites was investigated by employing the potentiodynamic polarisation method. The corrosion test results showed that the Al alloy-SiC composites exhibited slightly lower corrosion resistance than Al alloy. In contrast, addition of graphite particles increases the corrosion rate of Al alloy-SiC composite considerably since the graphite particles act as cathodic relative to the Al alloy. The surface morphology of the corroded surface was investigated using scanning electron microscope (SEM).