Influence of an acid pH and desoxygenation on the in vitro corrosion behaviour of preoxidised MA 956

The lifetime of implants is affected by the aggressivity of the physiologic al medium, which mainly results from the relatively high concentration of i on chlorides. There are, however, other transient situations that may enhan ce the aggressivity of the environment in the adjacent zones to the implant . For example, during the first days of the implantation is rather frequent to get bruises, inflammation, and even infections. These modifications cou ld dramatically influence the corrosion behaviour and decrease the life exp ectancy of the implant. In this work the corrosion behaviour of the MA 956, which has been proposed as a new biomaterial, is investigated under experi mental conditions of low pH and deareation, which simulate the most typical medical complications in service.