Corrosion behavior of titanium alloy Beta-21S coated with diamond like carbon in Hank's solution

► Carbon ion implantation leads to carbide formation and facilitates DLC deposition on titanium alloy. ► Corrosion resistance of the implanted layer in Hanks solution is lower than the substrate. ► Corrosion resistance is restored by deposition of DLC coating on the implanted layer. ► XPS results show that during corrosion process, the carbide is replaced by oxide.