Asian Journal of Scientific Research1992-14542077-2076Asian Network for Scientific Information10.3923/ajsr.2008.113.121EkumaC.E. IdenyiN.E. OnwuF.K. UmahiA.E. 2200812Corrosion tests were carried out on locally processed aluminum-based alloys with varying weight percentages of zinc. Test coupons of dimensions 17x16.8x15 mm were machined from the as-cast alloy to an average surface area of 1271 mm2. The coupons were immersed in 0.1, 0.25, 0.5 and 1.0 M NaCl solutions with a coupon withdrawn simultaneously from each medium at 24 hourly rate for characterization. The results revealed that the coupons gained weight in all the media indicating the phenomenon of passivation; with the greatest layer thickness observed in the range 0.25 to 0.5 M brine. This behavior is attributed to the increasing electrical conductivity of the solutions; a consequence of increasing solubility of the media which progressively increased peaking within this range and hence, increased passivation kinetics before declining due to the immobility of current carrying ions.]]>Callister, W.D.,19974th Edn.,Ekuma, C.E. and N.E. Idenyi,2006617511755Frankenthal, R.P. and J. Kruger,19781st Edn.,Idenyi, N.E. and C.E. Ekuma,20062006Idenyi, C.E., C.E. Ekuma and I.O. Owate,20062006Idenyi, N.E., C.E. Ekuma, J.B. Idenyi and A.E. Umahi,20062SO4 environments.]]>2006Kruger, J.,20012001Kuznetsov, Y.I.,200642312