Understanding the Effect of Tungsten on Corrosion Behavior of AlCuCrFeMnWx High-Entropy Alloys in 3.5 wt.% NaCl Solution

The electrochemical study of AlCuCrFeMnW x ( x  = 0, 0.05, 0.1, 0.5, 1 mol) high-entropy alloys (HEA) is performed in 3.5 wt.% NaCl solution at room temperature (25 °C). The potentiodynamic polarization curve of the AlCuCrFeMnW x ( x  = 0, 0.05, 0.1, 0.5, 1 mol) alloys obtained in 3.5 wt.% NaCl solu...

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Bibliographic Details
Published in:Journal of materials engineering and performance 2018-09, Vol.27 (9), p.4481-4488
Main Authors: Kumar, Devesh, Maulik, Ornov, Sharma, V. K., Prasad, Y. V. S. S., Kumar, Vinod
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Engineering Design
Materials Science
Quality Control
Reliability
Safety and Risk
Tribology
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Summary:The electrochemical study of AlCuCrFeMnW x ( x  = 0, 0.05, 0.1, 0.5, 1 mol) high-entropy alloys (HEA) is performed in 3.5 wt.% NaCl solution at room temperature (25 °C). The potentiodynamic polarization curve of the AlCuCrFeMnW x ( x  = 0, 0.05, 0.1, 0.5, 1 mol) alloys obtained in 3.5 wt.% NaCl solution shows that the corrosion resistance of the tungsten (W)-free HEA is lower than the alloys containing W. It is observed that W forms solid WO 3 layer in the outer region of the film in a 3.5 wt.% NaCl. The scanning electron microscopy and infrared spectroscopy confirmed the electrochemical results. The electrochemical impedance spectroscopy of these alloys had one capacitive loop, which represented the presence of electrical double layer.
ISSN:1059-9495
1544-1024
DOI:10.1007/s11665-018-3536-y