Abstract
The corrosion resistance of twelve Ni Cr dental casting alloys has been assessed by registrating their potentiodynamic polarization curves, polarization resistance curves, and potential-time curves, in a de-aerated and aerated artificial saliva. It has been found that not only the presence of chromium is needed to reduce the electrochemical activity of such alloys, but also that of molybdenum and manganese. The tendency to passivation is enhanced by these two elements, along with the resistance to pitting in a chloride-containing electrolyte. Alloys with low Cr content and without Mo did always corrode in the tested conditions.
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