Corrosion Resistance of Aeronautics Alloys Treated by Plasma Immersion Ion Implantation (PIII)

To increase the corrosion resistance of Al7075-T7351 and Ti-6Al-4V alloys were performed treatments by PIII. Experiments were made by using a mixture of N2 and H2 at ratio of 1:1. The time of treatment varied between one and three hours to verify its influence on the electrochemical behavior of these materials. After implantation process the samples of the aluminum and titanium alloys showed improved corrosion resistance. The better result was obtained to Al7075 alloy, due its smaller corrosion current density presented at polarization tests.