Gd–Ni–Ti coating to reduce corrosion of SS 316L for bioapplication

Abstract

ABSTRACT The aggressive electrolytic environment in the human body has an effect on the passive film of chromium oxide that forms on the implant metal’s surface in case of stainless steel and may be unstable for a long time and susceptible to localised corrosion due to the biological effects. So that, there is an attempt to use Gd-Ni-Ti coating was done on stainless steel ( S S 316 L ) by D C sputtering technique, to identify the corrosion properties in simulated body fluid at 37 o C . The characterisation methods were done to show the formed phases, elemental content and structure of coating that indicated the formation of N i 3 T i and G d 2 N i 15 phases as hemispherical structures. The results of the A F M examination gave an increasing in the surface roughness from 25.20 n m to 47.20 n m after coating due to the increasing in the maximum height and depth of clustering. The data of the corrosion test showed an improving in resistance and getting efficiency equal to 78.38 % .