Influence of Ni on electrochemical resistance of tribo-adaptive Ti-Al-Mo-N coatings

Abstract

Abstract Electrochemical behavior of Ti-Al-Mo-N coatings before and after addition of Ni in amount of 1 and 2 at. % was investigated in alkaline and acidic media. Ni resulted in decrease in the corrosion current an alkaline media and reduction of oxygen concentration in the coating material after electrochemical test. It was found that addition of Ni to Ti-Al-Mo-N coatings with high molybdenum content increases the resistance to dissolution in alkaline media, but does not have a significant positive effect on their resistance in acidic environments.