A hydroxyapatite (HAp) coating on 2304 duplex stainless steel (DSS) through an electrophoretic deposition process has been investigated in this work. The deposition voltage was 30 V with a time of 2 min. Field emission scanning electron microscopy and energy dispersive X-ray spectroscopy analyses were used for the microstructural and chemical examination of coatings, respectively. The Ca to P ratio for the nano HAp coating on 2304 DSS has been determined as equal to 1.642. It was observed from X-ray diffraction patterns that HAp nanoparticles were successfully combined into the substrate. The corrosion behaviour of all samples was tested in a simulated body fluid using a potentiodynamic polarization study. A homogeneous structure with a thin crack-free layer was obtained. Moreover, the porosity of this coating was very low leading to high corrosion resistance, thus promoting good biocompatibility
In this research, the EPD of HAp deposition on 2304 DSS was investigated along with its microstructure; surface morphology and corrosion behaviour in simulated body fluid (SBF) was also investigated.
The HAp coating on the 2304 DSS at 30 V for 2 min has the lowest corrosion rate value (0.277 mpy), i.e. high corrosion resistance in SBF, and thus it is more corrosion resistant than other uncoated samples.Prof. Dr. Eng Ali Sabea Hammood, PhD
J Appl Biomater Funct Mater 2020 Jan-Dec;18:2280800019896215
Department of Materials Engineering, Faculty of Engineering, University of Kufa, Najaf, Iraq.
Download full-text PDF