Corrosion resistance of the Ti-6Al-4V titanium alloy with nitride coatings in 0.9 % NaCl

Abstract

How would you……describe the overall signifi cance of this paper? In this work the positive infl uence of pressure at nitriding on the corrosion resistance of Ti-6Al-4V titanium alloy in 0.9% NaCl regardless of the solution temperature is determined. It is shown that the infl uence of the temperature at nitriding is positive for the solution temperature of 36ºС and negative for 40ºС. The corrosion resistance of the alloy is determined by the composition of nitride fi lm and its physical and chemical characteristics.…describe this work to a materials science and engineering professional with no experience in your technical specialty? The corrosion behavior in 0.9% sodium chloride (imitator of plasma of blood) of Ti-6Al-4V titanium alloy after the surface treatment in nitrogen is investigated. The forming of nitride fi lm decreases the corrosion rate of alloys 5-20 times depending on the parameters of nitriding. It is shown that stoichiometry and quality of nitride fi lm are determinative in the anticorrosion protection of the alloy's surface.…describe this work to a layperson? Titanium alloys are used widely as cardiovascular implants. The use of titanium implants without additional treatment does not provide satisfactory corrosion resistance. Therefore the infl uence of chemicothermal treatment, namely nitriding, on the corrosion resistance of Ti-6Al-4V titanium alloy in 0.9% NaCl which models the environment of the human organism is investigated in this work. It is determined that nitriding infl uences positively the protection of the alloy's surface, improving the corrosion resistance regardless the temperature of biological solution.The infl uence of temperature and pressure of nitriding on the corrosion resistance of Ti-6Al-4V titanium alloy in 0.9% NaCl was studied. It is shown that forming of nitride fi lm improves the anticorrosion characteristics of the alloy regardless of the temperature of the corrosion environment. At the temperature of 36ºС the pressure and temperature of nitriding positively infl uence the anticorrosion characteristics of the alloy. At 40ºС the pressure positively infl uences the protection of the alloy surface, and the infl uence of the temperature factor is negative.

Corrosion Behaviour of Ti-6Al-4V Alloy with Nitride Coatings in Simulated Body Fluids at 36∘C and 40∘Pohrelyuk1, Ткачук2, Proskurnyak3 2013ISRN CorrosionSelf Cite8020View full textAdd to dashboardCite

“…e content of each nitride in nitride zone depends on the nitrogen partial pressure during nitriding [13]. It was formed two types of nitride coating: I and II (Figure 1), by changing the gas dynamic conditions in the reaction chamber.…”

Use of Electron Microscopy in the Analysis of the Influence of Roughness on the Corrosion Behavior of Selected Ti Alloys

“…Other alloys used in these alloys include Cr, Cu, Zr, which have the task of improving mechanical properties. In the case of some elements (especially heavy metals), there are concerns about their negative effects on the human organism, especially during long-term interaction with body fluids, especially in the case of joint replacements [34][35][36][37].…”

Chemico-Thermal Treatment of Titanium Alloys - Nitriding

“…It should be noted that forming of these nitride layers gives new possibilities in surface engineering of titanium alloys, in particular, at the complex modification of surface layers by the interstitial elements (Pohreliuk et al, 2007;Pohrelyuk et al, 2009Pohrelyuk et al, , 2011Yaskiv et al, 2011;Fedirko et al, 2009). Thus, at thermocycling the nitriding process of titanium is intensified and reaches the maximum during processing in area of  transition.…”