Flame Coating of Stainless Steel 316 with Calcium Phosphate for Biocompatible Uses

Abstract

The aim of the present work is to prepare a biocompatible layer utilizing flame coating technology, and the biocompatibility of the simulated body fluids (SBF) is examined. Separately prepared calcium and phosphate solutions (0.2 M) were combined at various Ca/P molar ratios (1.4, 1.5, 1.65, 1.8, and 1.9), and a nozzle-thrown flame was used to spray the mixture at a pressure of 4 bar via the control valve. Three centimeters away from the flame orifice, the droplets contact the flame and deposit on the stainless steel 316 surfaces. Analytical data were obtained by the use of Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The results show that when the Ca/P ratio rose to 1.65, the peak intensity increased, and as the ratio increased, it declined. A greater degree of crystallization and a development in crystal size are also indicated by the width of the peaks decreasing in the same proportion.