Enhancing corrosion resistance of Al 5050 alloy based on surface roughness and its fabrication methods; an experimental investigation

The aim of this study is to investigate the effect of roughness fabrication methods on the corrosion resistance of Al-5050 alloy. The surfaces having roughness (0.45–6.2 μm) are generated by polishing, machining, and sandblasting. The surfaces are tested in 3.5wt%NaCl aqua solution with the voltage from −0.2 to 1.0 V with a scan rate of 0.1mv/s. Tafel curves are plotted to determine the corrosion current density (Icorr) and the corrosion...