Influence of various coating techniques on the corrosion resistive behavior Ringer's solution

摘要

Sol-gel silica glass has a significant effect on the microstructural and mechanical development of the implant materials. Sol-gel method is a versatile method to develop different types of oxide coatings on a large, curved substrates with high homogeneity and low sintering temperatures. In order to enhance the corrosion resistance behavior various types of oxide based, hybrid coatings have been studied. There are a number of interesting studies including the biological functions; biomineralisation with excellent bioactive ability and mechanical strength makes it suitable for biomedical applications. The aim of the work is to enhance the corrosion resistive behavior of the coatings using different strategies such as EPD method, spin coating and biomimetic coating. Silica glass is prepared at a molar ratio of H2O/TEOS (Tetra Ethyl Ortho Silicate) and the obtained powder was characterized by FT-IR, XRD and SEM analysis. It was found that the sol-gel spin coatings have shown excellent thermal stability, oxidation control and enhanced corrosion resistance on metal substrates. The ability to passivate the metal substrates during coating has pronounced effect on corrosion resistance. The corrosion resistance behavior of the coatings was determined by (1) open-circuit potential versus time of exposure, (2) electrochemical impedance spectroscopy, (3) cyclic polarization in Ringer's solution.