The invention provides a method of electrochemically calculating the corrosion rate of a metal. The method includes electrically connecting a reference electrode to an electrometer, electrically connecting a working electrode formed of a sample metal to the electrometer, electrically connecting a counter electrode to the working electrode, submerging the reference electrode, the working electrode and the counter electrode in a molten salt at a temperature of at least 100°C and as high as 900°C and generating current by scanning a working electrode potential to generate a polarization curve from which the corrosion rate may be calculated.
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