In the present investigation the corrosion measurements were carried out in 5% NaCl aqueous solution, 2.5% HCl. solution for predetermined time intervals and varying percentage concentrations of HCl solution at room temperature. Kinetics of corrosion effect on samples of Al-Zn alloy, Al-Zn –5wt% flyash and silicon carbide particles and Al-Zn –10wt% flyash and silicon carbide particles as reinforcement in composite are studied.