Electrochemical Characterization of AlTiN Coating on Stainless Steel Substrate for Biomedical Implant

Authors

  • Muhammad Umar Manzoor University of the Punjab
  • Faraz Hussain University of the Punjab
  • Hafsa Zafar University of the Punjab
  • Hamna Sajjad University of the Punjab
  • Asma Salman University of the Punjab
  • Fahad Riaz University of the Punjab
  • Ameeq Farooq University of the Punjab
  • Tahir Ahmad University of the Punjab
  • Muhammad Kamran University of the Punjab

DOI:

https://doi.org/10.54693/piche.04822

Keywords:

Physical Vapor Deposition Coating, AlTiN Coating, Corrosion Resistance, Electrochemical Impedance Spectroscopy, Scanning Electron Microscopy

Abstract

Physical Vapor Deposition technology is an established technique to deposit metallic and ceramic coatings on different metallic substrates. Lateral Arc Rotating Cathode (LARC) technology has an added advantages of better mechanical uniform coating, consistent erosion of the electrodes and greater degree of ionization. LARC technology was used to deposit AlTiN coating on stainless steel SS 316L samples. The electrochemical behavior of the coating and the substrate was investigated using Electrochemical Impedance Spectroscopy (EIS) technique. Ringer Lectate solution was used as a simulated body fluid at 35 ± 2oC. The coating and substrate were characterized by Scanning Electron Microscopy (SEM) with Energy Dispersive X-ray Spectroscopy (EDX) and Surface Profilometry. The Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy analysis revealed a consistent coating as a whole. The surface profilometry showed lower surface roughness after the coating. The Electrochemical Impedance Spectroscopy tests indicated that corrosion resistance of the coated sample was better, than the uncoated substrate in the electrolyte solution for short duration (one day) and behaved like cathodically protected coating and showed more resistivity. However, the Electrochemical Impedance Spectroscopy results varied because of the penetration of chlorite ions through the porosity in th coating and reaction with the coating material after the prolonged insertion.

Author Biography

Asma Salman, University of the Punjab

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Published

2021-01-29 — Updated on 2021-01-29

How to Cite

Manzoor, M. U., Hussain, F., Zafar, H., Sajjad, H., Salman, A., Riaz, F., Farooq, A., Ahmad, T., & Kamran, M. (2021). Electrochemical Characterization of AlTiN Coating on Stainless Steel Substrate for Biomedical Implant. Journal of the Pakistan Institute of Chemical Engineers, 48(2), 9–16. https://doi.org/10.54693/piche.04822

Issue

Vol. 48 No. 2 (2020): Journal of Pakistan Institute of Chemical Engineers

Section

Articles

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