Corrosion of Stirred Electrochemical Nano-Crystalline Hydroxyapatite (HA) Coatings on Ti6Al4V

Narayanan Ramaswamy; Venkatachalam Gopalan; Tae Yub Kwon

doi:10.3390/ma15238609

Corrosion of Stirred Electrochemical Nano-Crystalline Hydroxyapatite (HA) Coatings on Ti6Al4V

Materials (Basel). 2022 Dec 2;15(23):8609. doi: 10.3390/ma15238609.

Authors

Narayanan Ramaswamy¹, Venkatachalam Gopalan^{1

2}, Tae Yub Kwon³

Affiliations

¹ School of Mechanical Engineering, VIT Chennai, Chennai 600 127, India.
² Centre for Innovation and Product Development, VIT Chennai, Chennai 600 127, India.
³ Department of Dental Biomaterials, School of Dentistry, Kyungpook National University, Daegu 41566, Republic of Korea.

Abstract

Ti6Al4V substrates were electrochemically deposited with nano-crystalline hydroxyapatite (HA) from aqueous electrolytes. Cathodic HA coatings were obtained when the electrolyte was stirred using ultrasonic vibration. Two current densities of 20 mA/cm² and 50 mA/cm² were employed. Polarization and electrochemical impedance spectroscopy (EIS) were the techniques used to estimate the corrosion of coatings in simulated body fluid (SBF). The results indicate good corrosion resistance for the coating obtained at 50 mA/cm² from ultrasonic stirring of the electrolyte.

Keywords: Ti6Al4V; coating; corrosion; hydroxyapatite; nano-crystalline; ultrasonics.

Grants and funding

This research received no external funding.