Preparation and activation of micro-arc oxidation films on a TLM titanium alloy.

In order to improve the biocompatibility and surface activity of a TLM alloy, a layer of a porous TiO(2) film was prepared by the micro-arc oxidation method on the surface, and then the NH(-)(2) active group was introduced on the film by an activation treatment in an aminated solution. The phase identification and surface characteristics of the micro-arc oxidation films were characterized by XRD, XPS, SEM and EDS. The in vitro blood compatibility of the TLM alloy samples with and without surface modification was evaluated by contact angle tests, hemolysis tests and electrochemical tests. The results indicate that the biocompatibility and surface activity of the TLM alloy could be remarkably improved by surface modification of micro-arc oxidation and activation treatment.