Abstract
The corrosion and corrosion passivation of aluminum alloy 1050 (AA 1050) that was fabricated by equal-channel angular press (ECAP) after different pass time numbers, namely, 0, 1, 2, and 4, in Arabian Gulf water (AGW) have been reported. The study was carried out using cyclic potentiodynamic polarization (CPP), chronoamperometric current-time (CT), and electrochemical impedance spectroscopy (EIS) measurements after 20 min and 10 days immersion in the AGW solutions. CPP experiments showed lower corrosion rate and higher corrosion resistance for the ECAPed alloy than annealed one; this effect increases with increasing the number of pass time. CT curves at. -630 mV vs. Ag/AgCl and EIS spectra indicated that the increase of pass time highly decreases both uniform and pitting corrosion. Results collectively proved that the corrosion rate decreases and resistance for uniform and pitting attacks increases with increasing the number of pass time and the best performance was obtained for ECAPed AA 1050 alloy after 4 passes. For that the behavior of the cast alloy was compared to the ECAPed one after 4 passes was also reported after 10 days immersion before measurements.