Thermal Oxidation Process Improved Corrosion in Cobalt Chromium Molybdenum Alloys

摘要: The corrosion phenomena are always give bad impact to any metal products including human implants. This is due the impacts harmful for hard tissues and soft tissues. There many methods prevent process of on implant materials such as coating with bioceramic modify surface modification techniques. However, until now there still no gold standard overcome this problem it remain in researching process. Thus, aim research investigate potential economical method reduce effects Cobalt-Chromium-Molybdenum (Co-Cr-Mo) based alloy when insert body. thermal oxidation was selected treat Co-Cr-Mo substrate. Firstly, heated muffle furnace at constant temperature 850°C different duration heating 3 hours 6 order analyze formation oxide layer. behaviours untreated sample and oxidized sample were investigated utilizing potentiodynamic polarization tests simulated body fluids (SBF). Vickers hardness after testing measured evaluate effect reducing rate. Based results obtained clearly showed that substrates undergone time performed better than duration, value 832.2HV vs. 588HV respectively. Dense layer uniform thickness formed able help without degraded its excellent mechanical properties. microstructures before test also analyzed using FESEM images observations. It determined resistance substrate can be increased alloys