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Pitting corrosion behavior of SS-316L in simulated body fluid and electrochemically assisted deposition of hydroxyapatite coating

Yassine Koumya, Youssef Ait Salam, Mohy Eddine Khadiri, Jaouad Benzakour, Abderrahmane Romane, Abdesselam Abouelfida, and Abdelaziz Benyaich

Laboratory of Applied Chemistry and Biomass, Department of Chemistry, Faculty of Science Semlalia, University Cadi Ayyad, Marrakech, Morocco

 

E-mail: koumya.yassine@gmail.com

Received: 7 July 2020  Accepted: 13 January 2021

Abstract:

The pitting corrosion of SS-316L in human body fluid leads the metallic prosthesis to lose its strength along with severe health consequences such as metallosis condition. Hence, an effective alternative for enhancing the biocompatibility of the SS-316L implant is the electrochemical deposition of a bioinert hydroxyapatite (HAP) coating over the metallic surface. A dense HAP coating was successfully developed on SS-316 L in a supersaturated electrolyte containing Ca+2 and PO43− ions. Electrochemical essays and SEM morphological observation showed the SS-316 L pitting corrosion caused by chloride containing body fluid. The effects of the electrodeposition time and the temperature of the supersaturated electrolyte were assessed using current–time transients, scanning electron microscopy, Energy-dispersive X-ray spectroscopy, Raman and X-ray diffraction analyses. The increase in the temperature promotes the HAP coating formation and accelerates the particles nucleation. An instantaneous HAP growth with no evidence for intermediate phase of HAP formation has been noticed.

Keywords: Corrosion; SBF; Hydroxyapatite; PDP; Impedance; Cyclic voltammetry; Current–time transients; SEM; XRD; Raman

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-021-01517-x

 

Chemical Papers 75 (6) 2667–2682 (2021)

Tuesday, September 21, 2021

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