Publication: Corrosion and electrochemical behavior of CoСrFeNiMo high-entropy alloy in acidic oxidizing and neutral chloride solutions
Дата
2023
Авторы
Bogdanov, R. I.
Vorkel, V. A.
Bachurina, D. M.
Sevryukov, O. N.
Marshakov, A. I.
Journal Title
Journal ISSN
Volume Title
Издатель
Аннотация
Corrosion and electrochemical behavior of equimolar CoCrFeNiMo high-entropy alloy in various chloride-containing solutions with different pH were investigated by electrochemical and long-term immersion tests. The microstructure and surface characterization of the HEAs were studied by X-ray diffraction and scanning electron microscopy. Based on the accelerated electrochemical tests, it is difficult to assess the effect of hydrogen peroxide on the decrease in the corrosion resistance of the HEAs. The results of immersion tests for more than 3000 h showed that the CoCrFeNiMo HEAs have excellent long-term corrosion resistance in the neutral and acidic NaCl solutions (corrosion rates – not higher than 1 μm/year). The long-term corrosion resistance decreased with the addition of 0.01 M H2O2 in the acidic solution of NaCl (corrosion rates – about 21 μm/year). The corrosion resistance significantly decreased in the presence of the strong oxidizing reagent FeCl3 (corrosion rates – about 0.26 mm/year). The SEM results showed that the (Cr, Mo)-depleted regions were mainly corroded. The phases enriched in Cr and Mo became susceptible to active corrosion in the presence of FeCl3 or under high anodic polarization in the acidic NaCl solution containing 0.01 M H2O2. © 2022 Elsevier B.V.
Описание
Ключевые слова
Corrosion rate , High-entropy alloy , Hydrogen peroxide , Immersion test , Polarization curves
Цитирование
Corrosion and electrochemical behavior of CoСrFeNiMo high-entropy alloy in acidic oxidizing and neutral chloride solutions / Bogdanov, R.I. [et al.] // Materials Chemistry and Physics. - 2023. - 295. - 10.1016/j.matchemphys.2022.127123
URI
https://www.doi.org/10.1016/j.matchemphys.2022.127123
https://www.scopus.com/record/display.uri?eid=2-s2.0-85143374838&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000898886900005
https://openrepository.mephi.ru/handle/123456789/29879
https://www.scopus.com/record/display.uri?eid=2-s2.0-85143374838&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000898886900005
https://openrepository.mephi.ru/handle/123456789/29879