Cobalt Chromium Molybdenum Alloys
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- Category: Molybdenum knowledge
- Published on 28 June 2013
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The electrochemical behaviour and corrosion resistance in vitro of two CoCrMo alloys (Vitallium, Vera PDI) has been evaluated in AFNOR artificial saliva, at 25 degrees C.
The evaluation was carried out through the analysis of the open circuit potential variation with time, potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS) tests.
The microstructure and surface condition after corrosion measurements was evaluated by Optical Microscopy. Very low current densities were obtained (order of nA/cm(2)) from the polarization curves and EIS.
Indicating a typical passive behavior for both investigated alloys. The EIS results exhibited near capacitive behavior which is indicative of the formation of a stable film on both CoCrMo alloys in artificial saliva.
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