Influence of Titanium Additions to Aluminum on the Microhardness Value and Electrochemical Behavior of Synthesized Aluminum-Titanium Alloy in Solutions of HCl and H3PO4

Abstract The effect of Ti content in various concentrations as an alloying element with Al on both microhardness and crystallization structure aluminum–titanium alloys was studied, utilizing x-ray diffraction (XRD) a scanning electron microscope (SEM). To study the electrochemical corrosion performance its investigated 0.5 M solutions HCl H 3 PO 4, two different techniques were used: extrapolation Tafel plot impedance spectroscopy (EIS). plots EIS revealed similar trend. Generally, rate higher than that Al. This investigation exhibited increased increase temperature, which is due to reducing growth oxide film surface. Changes standard values entropy (Δ S ) enthalpy ), addition apparent activation energy ( E processes evaluated. evaluated data indicated negative Δ S, while positive. Besides, decrease value alloy dissolution studied fast. positive accompanied by endothermic process. On other hand, decreased result mentioned acids. Those results supported current density i corr .) parameters. By comparing obtained for 4 all electrodes, lower HCl. Such behavior can be ascribed aggressive attack Cl¯ ions surfaces leading pits formation.