Effect of Different Media on the Corrosion Behavior and Some Mechanical Properties of Al-Zn-Mg Alloy


This work investigates the effect of different media (0.1N of NaOH, H2SO4and NaCl solution) on the polarization behavior of Al-Zn-Mg alloy and calculatessome of the corrosion parameters such as corrosion potential (Ecorr) and currentdensity (icorr), cathodic and anodic Tafel slopes (bc & ba), and the polarizationresistance (Rp) .The results of the polarization resistance indicates that Al-Zn-Mg alloy haveresistance in slat solution higher than that observed in acidic and basic solutionrespectively .Also some of the mechanical properties like the hardness and wear weremeasured. The results for hardness showed that the untreated alloy in theexperimental solutions had higher hardness than those which are treated in salt,acidic , and basic solutions respectively .While the results for the rate of wear at different sliding speeds showed that therate of wear for the samples that treated in basic solution higher than those forsamples which are treated in the acidic and salt solutions . Also the same resultswere get when measure the rate of wear with different applying loads.