What is it about?
DC glow discharge plasma nitriding is the process of surface hardening through the spread of nitrogen atoms to the metal surface under special conditions of the plasma nitriding. Titanium and titanium alloys are the most common alloys used in medical applications. Titanium and its alloys are lightweight, corrosion resistant, and have good fatigue properties but lack wear resistance under aggressive environments. The plasma nitriding process was used for a titanium alloy (Ti–6Al–4V) rod with different parameters at a vacuum chamber of air (2 mbar), 680 volts and 30 mA. The plasma nitriding process was performed at different nitriding times (5, 10, and 15 h).
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Why is it important?
The results indicate that the formation of layers and phases Ti2N and Ti2N3−x on a surface of the alloy were achieved, which would improve the surface characteristics of chemical corrosion in simulated body fluid.
Perspectives
The results obtained from polarization curves suggest that the plasma-nitrided Ti–6Al–4V alloy for different nitriding times improved corrosion resistance in an SBF when compared with the untreated alloy. These improvements can be seen from the low current density and low passive current density obtained at 10-h nitriding.
Prof. Dr Eng. Ali Sabea Hammood
University of Kufa -Faculty of Engineering -Materials Engineering Department
Read the Original
This page is a summary of: Corrosion Behavior Evaluation in Simulated Body Fluid of a Modified Ti–6Al–4V Alloy by DC Glow Plasma Nitriding, Journal of Bio- and Tribo-Corrosion, October 2019, Springer Science + Business Media,
DOI: 10.1007/s40735-019-0290-0.
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