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Effect of post-oxidizing temperature on tribological and corrosion behavior of plasma nitrided austenitic stainless steel
Research highlights ► Post-oxidation treatment reduces wear resistance of plasma nitrided sample. ► Post-oxidation treatment increases corrosion resistance of plasma nitrided sample. ► Post-oxidation treatment reduces the surface roughness of plasma nitrided sample. ► The amount of S-phase decreases as the post-oxidation temperature increases. ► Increasing oxidation temperature decreases corrosion resistance of oxidized samples.
Abstract In this study, the effect of temperature of post-oxidation process on tribological and corrosion behavior of AISI 316 plasma nitrided stainless steel has been studied. Plasma nitriding was carried out at 450°C for 5h with gas mixture of N2/H2 =1/3. The plasma nitrided samples were post-oxidized for 1h with gas mixture of O2/H2 =1/5 at different temperature of 400, 450 and 500°C. The structural, tribological and corrosion properties were analyzed using XRD, SEM, microhardness testing, pin-on-disk tribotesting and electrochemical polarization. The results indicated that the nitride layer was composed of S-phase. The amount of S-phase decreased as the treatment temperature rose from 400°C to 500°C. In addition, it was found that oxidation treatment reduces wear resistance of plasma nitrided sample. It was demonstrated that the corrosion characteristics of the nitrided sample were further improved by post-oxidation treatment. The difference in corrosion resistance is mainly attributed to the thickness of the oxide top layer, which is governed by the post-oxidizing temperature.
Effect of post-oxidizing temperature on tribological and corrosion behavior of plasma nitrided austenitic stainless steel
Research highlights ► Post-oxidation treatment reduces wear resistance of plasma nitrided sample. ► Post-oxidation treatment increases corrosion resistance of plasma nitrided sample. ► Post-oxidation treatment reduces the surface roughness of plasma nitrided sample. ► The amount of S-phase decreases as the post-oxidation temperature increases. ► Increasing oxidation temperature decreases corrosion resistance of oxidized samples.
Abstract In this study, the effect of temperature of post-oxidation process on tribological and corrosion behavior of AISI 316 plasma nitrided stainless steel has been studied. Plasma nitriding was carried out at 450°C for 5h with gas mixture of N2/H2 =1/3. The plasma nitrided samples were post-oxidized for 1h with gas mixture of O2/H2 =1/5 at different temperature of 400, 450 and 500°C. The structural, tribological and corrosion properties were analyzed using XRD, SEM, microhardness testing, pin-on-disk tribotesting and electrochemical polarization. The results indicated that the nitride layer was composed of S-phase. The amount of S-phase decreased as the treatment temperature rose from 400°C to 500°C. In addition, it was found that oxidation treatment reduces wear resistance of plasma nitrided sample. It was demonstrated that the corrosion characteristics of the nitrided sample were further improved by post-oxidation treatment. The difference in corrosion resistance is mainly attributed to the thickness of the oxide top layer, which is governed by the post-oxidizing temperature.
Effect of post-oxidizing temperature on tribological and corrosion behavior of plasma nitrided austenitic stainless steel
Abedi, H.R. (author) / Salehi, M. (author)
2010-11-19
7 pages
Article (Journal)
Electronic Resource
English
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