Electrochemical study of nanocrystalline plasma electrolytic carbonitriding of CP‐Ti
Author:
Aliofkhazraei M.,Salasi M.,Sabour Rouhaghdam A.,Taheri P.
Abstract
PurposeThe aim of this paper is to obtain optimal corrosion resistance of certain differently treated samples by investigation of their electrochemical properties.Design/methodology/approachNanocrystalline plasma electrolytic carbonitriding (PEC/N) treatments were applied on the surface of commercially pure titanium in a glycerol bath with different additives. The carbonitriding process was performed in a glycerol bath with different additives such as carbamide, natrium nitrate and triethanolamine. The effects of electrolyte composition on chemical composition and corrosion resistance of the PEC/N films were examined by means of X‐ray diffraction, scanning electron microscopy, potentiodynamic polarization and electrochemical impedance spectroscopy in a Ringer solution.FindingsThe results showed that the PEC/N films obtained in solutions with triethanolamine (T‐film) had better corrosion resistance. All coated samples had a better electrochemical behaviour compared with the untreated substrate. Different nano‐structures and morphologies were obtained by different additives in electrolyte.Practical implicationsThe results obtained in this research into nanocrystalline PEC/N can be used wherever good corrosion and wear resistance with the highest efficiency is required.Originality/valueThe speed of treatment by this technique makes this method very suitable for the industrial surface treatment of different components.
Subject
General Materials Science,General Chemical Engineering
Reference16 articles.
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