Influence of regulated modification of nitride layer by oxygen on the electrochemical behavior of Ti–6Al–4V alloy in the Ringer's solution

Abstract

The corrosion behavior of oxynitrided Ti-6Al-4V alloy was investigated in the Ringer's solution (simulated body fluid) at a temperature of 37°C. The oxynitriding of the alloy was carried out by leaking controlled oxygencontaining medium into the reaction chamber at the final stage of the nitride formation. It was determined that oxynitriding improved corrosion resistance of Ti-6Al-4V alloy as it provided lower corrosion current density by 1.3-1.5 times and higher corrosion potential. In this paper, we analyzed that the resistance of the double layer had increased with the increase of the oxygen content in titanium oxynitride. Its value was higher compared with untreated alloy, indicating higher corrosion resistance of the oxynitrided one. K E Y W O R D S corrosion, oxynitriding, Ringer's solution, Ti-6Al-4V alloy

Corrosion Resistance of a Plasma-Oxidized Ti6Al4V Alloy for Dental Applications

“…The combination of properties such as high specific strength, excellent resistance to corrosion in a good number of industrial environments, and biocompatibility have made titanium alloys very attractive to applications other than the aerospace industries [2][3][4][5][6][7][8]. Among Ti alloys, one of the most remarkable alloys is Ti6Al4V, which is especially useful as an implant material, including dental implants, in the health sector [9][10][11][12][13][14]. The corrosion and oxidation resistance of this alloy is based on the development on their surface of a mixture of TiO 2 and Al 2 O 3 oxides [15][16][17], which provide a very stable passive layer and protect the alloy against the corrosive action of substances in the environment, such as chlorides, sulphates, and acids, among others [18][19][20][21].…”

The Effect of Plasma Nitridation on Surface Hardness of Titanium Alloy (Ti-6Al-4V) for Artificial Knee Joint Applications

“…(b) There is a change in the texture of the material which allows new compounds to occur on the surface of the sample. Metal compounds that may form during the plasma nitriding process on Ti-6Al-4V are iron nitride (FeN), titanium nitride (TiN), aluminum nitride (AlN) and vanadium nitride (VN) which have very high hardness properties [12][13][14][15]. The presence of Fe compounds after the nitriding process is possible due to the sprinkling of Fe atoms on the plasma reactor tube walls made of stainless steel, so that they also diffuse into the sample.…”

Comparison of Friction Behaviour of Titanium Grade 2 after Non-Contact Boriding in Oxygen-Containing Medium with Gas Nitriding

“…Therefore, the wear resistance of titanium is a limiting factor for its use as a bearing material in articulated joint implants. There are many methods for increasing wear and fretting resistance of titanium [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21], among which diffusion methods (thermochemical treatment) [11][12][13][14][15][16][17] are attractive. This is explained by the fact that these methods are technologically simple and provide stable physicochemical and mechanical characteristics of the treated surface.…”