Corrosion Resistance Analysis of Al-Cu, Al-Zn and Al-Cu-Zn Alloys

Anticipating an alloy's corrosion resistance is essential to avoid product failure and reduce costs. However, to ensure that the predictions are accurate and correct, validation and testing is still required. Research and analyze the corrosion resistance of Al-Cu, Al-Zn and Al-Cu-Zn alloys based on the analytical balance of the elements according to weight, thermodynamic, metallurgical rules on metal alloys, kinetic and other properties. The development of this alloy is limited by its low corrosion resistance, limiting its use in many applications. The purpose of this study is to determine the corrosion resistance of Al-5-wt% Cu, Al-5-wt% Zn and Al-5-wt% Cu-5-wt% Zn alloys based on the analytical calculation. Based on the analytical calculation results, the Al-Zn-Cu alloy has the best corrosion resistance with a corrosion rate of 0.4375 mmpy. Next is the Al-Cu alloy with a corrosion rate of 0.4634 mmpy. While Al-Zn alloy has the lowest strength with a corrosion rate of 0.4828 mmpy. Based on standard EMF potential values for these three alloys. Al-Zn alloys are most active with an E^OAl-Zn value of-1.61 V, followed by Al-Zn-Cu alloys with an E^OAl-Cu-Zn value of-1.60 V, and the noblest Al-Cu alloy has the most positive E^OAl-Cu value of-1.56 V. Faraday's law to get corrosion rates of the anode and cathode materials. In the third reaction, the exothermic alloy has a positive value of ∆H so the exothermic reaction occurs. Experimental tests are needed to confirm the results obtained.