CORROSION BEHAVIOR OF Al/SiC/PKSA HYBRID COMPOSITES IN 1.0 M H2SO4 ENVIRONMENT USING POTENTIODYNAMIC POLARIZATION TECHNIQUE

The potentiodynamic polarization of aluminium 6063 alloy reinforced with silicon carbide (SiC) and palm kernel shell ash (PKSA) particulates at various mixing ratios was investigated. Double stir casting method was adopted for the production of the hybrid reinforced composites. The existence of the reinforcements within the matrix alloy acted as active sites for corrosion initiation. Hence, pitting corrosion was observed. The range of values for Ecorrand Icorr obtained at 24 h in 1.0 M H2SO4 were between-627.74 and-644.46 mV, and between 423.81 and 860.23 mu A/cm2, respectively. The Ecorr values ranged from-654 to-697.22 mV, and the Icorrranged from 1075.65 to 3057.16 mu A/cm2 at 72 h in 1.0 M H2SO4. The relative resistance to corrosion of the samples is depend-