Abstract
The cathodic plasma electrolytic deposition (CPED) was performed in alkaline electrolyte (glycerol + sodium nitrite) to form a nitrocarburized layer on AISI 1045 steel at constant voltage of 380 V. The results indicated that nitrocarburized layer was mainly comprised of ε–Fe2–3N, γ'–Fe4N, Fe3C and Fe [Fe(CN)6]3 phases. As the treatment time was prolonged from 5 to 15 min, the surface porosity increased from 4.13 to 7.43%, while the thickness of layer was increased about 70% from 13 to 22 μm. On the contrary, the corrosion test revealed that the coatings prepared at 10 min treatment time had the best corrosion resistance with a value of 27 384 Ω.cm2. Moreover, the mechanical behavior of coatings was also significantly increased by treatment time. The surface hardness increased 5 times, while the wear friction coefficient and wear rate of nitrocarburized layer were decreased to about \({\text{1/}}3~\) and \(1{\text{/}}6~\) respectively compared to that of the substrate.
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Notes
Plasma Electrolytic Nitrocarburizing.
Energy Dispersive Spectroscopy.
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Noori, S.M., Dehghanian, C. Effect of treatment time on Corrosion and Tribological behavior of Nitrocarburized coating by Cathodic Plasma Electrolytic Deposition. Prot Met Phys Chem Surf 57, 121–131 (2021). https://doi.org/10.1134/S2070205120060179
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DOI: https://doi.org/10.1134/S2070205120060179