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Abstract We investigated the corrosion behaviour and passive film characteristics of interstitial equiatomic CoCrFeMnNi high-entropy alloys (HEAs) with various carbon concentrations in 3.5 wt.% NaCl-saturated Ca(OH)2 solution. The results showed that… Click to show full abstract
Abstract We investigated the corrosion behaviour and passive film characteristics of interstitial equiatomic CoCrFeMnNi high-entropy alloys (HEAs) with various carbon concentrations in 3.5 wt.% NaCl-saturated Ca(OH)2 solution. The results showed that the carbon caused complex effects on corrosion behaviour. The properties of the passive film were modified by carbon; specifically, the doping concentration first continuously decreased to a minimum and then began to increase when the carbon concentration changed from 0 to 0.8 at.%. The HEA with 0.5 at.% carbon showed the best pitting resistance, which was attributed to the enrichment of the Cr and Co elements within the passive film.
Journal Title: Corrosion Science
Year Published: 2020
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