Е. V. Nikitina
KEYWORDS:
corrosion, corrosion rate, corrosion potential, zirconium, zirconium dioxide, molten alkali metal carbonates, gravimetry, potentiostatic anodic polarization
ABSTRACT:
Corrosion and electrochemical characteristics of zirconium at its interaction with molten carbonates of lithium, sodium, and potassium , containing from 1 to 5 weight percent additives in the salt phase, at 500–800°C were studied. Gravimetric, corrosion potentials techniques and the anodic polarization curves method were used. Substances reducing corrosion losses by hardening and thickening the oxide film (hydroxides of lithium, sodium, and potassium) were used as corrosion passivators. Chloride, fluoride and sulfate of sodium were applied as corrosion stimulators (activators).