Electrochemical Corrosion Behavior of Monel Alloy in Carbonate Melts

The interaction of the monel alloy and its corrosion resistance in a melt of alkali metal carbonates in an oxidizing atmosphere was studied. The selectivity of alloy dissolution and modification of the electrode surface after storage at a constant anode potential were analyzed. The generation and de...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2018-09, Vol.54 (9), p.697-701
Main Authors: Nikitina, E. V., Kazakovtseva, N. A., Maikov, M. A., Malkov, V. B., Karfidov, E. A., Chuikin, A. Yu
Format: Article
Language:English
Subjects:
Alkali metal alloys
Anodes
Anodic polarization
Carbonates
Chemistry
Chemistry and Materials Science
Copper
Corrosion
Corrosion resistance
Corrosion resistant alloys
Electrochemical corrosion
Electrochemistry
Electrode polarization
Electrodes
Lithium
Melts
Monel (trademark)
Nickel base alloys
Oxidation
Physical Chemistry
Potassium carbonate
Stress corrosion cracking
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Summary:The interaction of the monel alloy and its corrosion resistance in a melt of alkali metal carbonates in an oxidizing atmosphere was studied. The selectivity of alloy dissolution and modification of the electrode surface after storage at a constant anode potential were analyzed. The generation and development of local corrosion defects (pit corrosion, intercrystallite corrosion, corrosion cracking) on monel alloy (70% nickel, 28% copper), copper, and nickel electrodes in the molten eutectic of lithium, sodium, and potassium carbonates at a working temperature of 773 K were studied. The anode polarization was accompanied by a change in the state of the electrode surface.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193518090082