Hardness and corrosion rate of cocrmo

Abstract

Synthesis of bulk CoCrMo with the composition around 30% Co, 65% Cr, and 5% Mo had been done through melting, forging, and rolling processes. The material is potentially applied in orthopedic implant since it is biocompatible, strong, and has a low corrosion rate. A small portion of Nitrogen may be added to the composition in order to stabilize and improve its hardness. It is found in this investigation that Nitrogen (0,6% of the composition) results in improvement around 25% of the hardness, however it is also increase the corrosion rate from 0.0025 to 0.0329.