Corrosion resistance studies of copper and magnesium-doped fluorohydroxyapatite coatings on titanium biomaterial

• Published in: Journal of adhesion science and technology Vol. 38; no. 7; pp. 1101 - 1123
• Main Authors: Khenchoul, Nawel, Halladja, Sabrina, Maouche, Naima, Litim, Mohamed, Ayadi, Hassan, Zaim, Keltoum, Derbal, Sabrine
• Format: Journal Article
• Language: English
• Published: Utrecht Taylor & Francis 02.04.2024; Taylor & Francis Ltd
• Subjects: Aeration; Apatite; biomedical implants; Biomedical materials; Body fluids; Coatings; Copper; corrosion; Corrosion prevention; Corrosion resistance; Crystal lattices; Crystallites; Electrochemical impedance spectroscopy; Electrode polarization; Fluorine; fluoro hydroxyapatite; Fourier transforms; Hydroxyapatite; Infrared spectroscopy; Magnesium; Orthopaedic implants; Orthopedics; Serum albumin; Spectrum analysis; Surgical implants; Titanium
• ISSN: 0169-4243; 1568-5616
• DOI: 10.1080/01694243.2023.2251762

This study discusses the contribution of Cu 2+ and Mg 2+ , two biologically important ions substituted into the structure of fluorohydroxyapatite. FHA, a partial substitution of fluorine ion in HA has received a great attention because it improves the corrosion resistance of orthopedic implants. Copper, Magnesium and copper-Magnesium doped fluorohydroxyapatite (FHA) coatings were electrochemical deposited on titanium (Ti) using a cyclic voltammetry technique. The coatings properties were identified by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The corrosion behavior of coated and uncoated samples, immersed for 7 days in aerated simulated body fluid (SBF) in a presence of 0.2 g/l human serum albumin (HAS) was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The synergetic effect of albumin and doped elements on the degradation of Ti was studied. As a result of these investigations, it is revealed that: fluoride, copper and magnesium were successfully incorporated into apatite lattice structure. The additions of ions in FHA crystal matrix reduced the crystallite size, increased the crystallinity and changed the structure of F-hydroxyapatite. All the electrochemical techniques employed demonstrated that the coatings that were produced offered superior protection against corrosion for titanium when exposed to artificial body fluids. The nano-Mg-FHA coating improves effective protection to Ti and presents the highest corrosion resistance. The outcomes of this investigation were also compared with already published works to validate the research results.