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Electrochemical Determination of Corrosion Rate of 12X18H10T Steel and EP760 High Alloy in Salt Melt
https://doi.org/10.31615/j.corros.prot.2025.118.4-2
Abstract
Linear polarization resistance (LPR), voltammetry, and gravimetry methods used to determine the rate and nature of corrosion of 12X18H10T steel and EP760 alloy (KHN65MVU) at 300…500 °C in a KAlCl4 and ZrCl4 melt designed to produce zirconium by extractive rectification. The corrosion rate of 12X18H10T steel in an aerated salt melt at temperatures up to 450 °C is extremely high and can exceed 100 mm/year. The use of argon purging and aluminum melt purification can significantly reduce the corrosion rate of 12X18H10T steel and EP760 alloy in a chloride melt. The automatic LPR method used for corrosion monitoring of 12X18H10T steel and EP760 alloy in chloride melts at temperatures up to 450 °C. The use of the Tafel extrapolation method in the classical version is difficult due to an increase in the surface roughness of the electrodes, the duration of measurements, and the dependence of the corrosion rate on the exposure time.
Keywords
zirconium production,
chloride melts,
high-temperature corrosion,
stainless steels,
high alloys,
electrochemical methods
Supporting agencies: This work was supported by the Ministry of Science and Higher Education of the Russian Federation.
About the Authors
N. G. Anufriev
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS)
Россия
Россия
Nikolay G. Anufriev, Cand. Sci. in Chemistry, researcher
bld. 4, 31, Leninskiy pr., Moscow, 119071
Y. A. Kuzenkov
Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS)
Россия
Россия
Yury A. Kuzenkov, Cand. Sci. in Chemistry, senior researcher
bld. 4, 31, Leninskiy pr., Moscow, 119071
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Review
For citations:
Anufriev N.G., Kuzenkov Y.A. Electrochemical Determination of Corrosion Rate of 12X18H10T Steel and EP760 High Alloy in Salt Melt. Theory and Practice of Corrosion Protection. 2025;30(4):16-28. (In Russ.) https://doi.org/10.31615/j.corros.prot.2025.118.4-2
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