Study of the Efficiency of Single Annealing of Pure Titanium and Titanium Alloy in Resisting Cyclic Oxidation at 900°C

The purpose of the research is to modify the surface of pure titanium and titanium alloy using a single aluminized coating system (cementation) at 1000oC, which led to structural changes in the surface of the aluminized models and to study the efficiency of this coating in resisting oxidation through a periodic oxidation test at a temperature of 1000oC for 150 hours. Microscopic examinations were conducted with a scanning electron microscope (SEM-EDS) and X-rays on the aluminized samples to determine the structures and phases that formed as a result of aluminization, which had a major role in improving the resistance of pure aluminized titanium and titanium alloy to oxidation and corrosion compared to the non-aluminized models, as the efficiency of the coating on the titanium alloy was better than its efficiency on pure titanium, and the reason is due to the formation of a thin protective layer of alumina with high adhesion and high thermal stability.