Journal
SURFACES AND INTERFACES
Volume 27, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.surfin.2021.101481
Keywords
High entropy alloy coatings; Potentiodynamic polarization; Corrosion rate; Phase constitution; X-ray diffraction; X-ray photoelectron spectroscopy
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Funding
- SERB, Government of India
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The study found that the corrosion resistance of Cr-containing AlCrNiCoFeCu HEA coating is higher than that of AlNiCoFeCu HEA coating in salt solution, mainly due to the formation of metallic oxides film over the coating surface.
Corrosion behavior and protective film constitution of electrodeposited AlNiCoFeCu and AlCrNiCoFeCu high entropy alloy (HEA) coatings were investigated. The corrosion parameters determined using the potentiodynamic polarization and weight loss measurement techniques showed that the corrosion resistance of Cr-containing AlCrNiCoFeCu HEA coating is higher than that of AlNiCoFeCu HEA coating in 3.5 wt.% NaCl solution. The surface analysis showed that the Cr in AlCrNiCoFeCu HEA coating enhanced the formation of metallic oxides film, over the coating surface, that reduced ionic diffusion and improved the coating corrosion resistance of AlCrNiCoFeCu HEA when compared to the AlNiCoFeCu HEA coating.
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