The Corrosion Behavior of Electrodeposited AlCoCrFeNi Medium Entropy Alloy Coating: Effect of Deposition Time

IF 2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials and Corrosion-werkstoffe Und Korrosion Pub Date : 2025-06-04 DOI:10.1002/maco.12005

Ashwin Shah, Rajesh Kumar Rai, Brij Mohan Mundotiya

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Abstract

In this study, the microstructure and corrosion behavior of electrodeposited AlCoCrFeNi medium entropy alloy (MEA) coatings were examined. The coatings were deposited with varied deposition times from 5 to 30 min. It was shown that the composition was significantly impacted by the deposition time, which consequently affected the corrosion behavior. X-ray diffraction analysis revealed that a single-phase face-centered cubic (FCC) coating was formed during deposition. The deposited coating at 20 min exhibited the highest corrosion resistance. The corrosion current density value and corrosion potential value of the deposited coating at 20 min were 3.07 ± 0.80 μA/cm² and −219 ± 0.54 mV, respectively. The coating deposited at 20 min contained a high Al, Ni, and Cr content, resulting in the formation of more stable Al₂O₃, NiO, and Cr₂O₃ oxide layers on the coated surface. These stable oxide layers improved the corrosion resistance of the coating.

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电沉积AlCoCrFeNi中熵合金镀层的腐蚀行为：沉积时间的影响

研究了电沉积AlCoCrFeNi介质熵合金（MEA）涂层的显微组织和腐蚀行为。涂层的沉积时间从5到30分钟不等。结果表明，沉积时间对合金成分有显著影响，从而影响了合金的腐蚀行为。x射线衍射分析表明，沉积过程中形成了一层单相面心立方（FCC）涂层。沉积时间为20min的涂层具有最高的耐蚀性。沉积涂层在20 min时的腐蚀电流密度值为3.07±0.80 μA/cm2，腐蚀电位值为- 219±0.54 mV。20min沉积的涂层含有较高的Al、Ni和Cr含量，导致涂层表面形成更稳定的Al2O3、NiO和Cr2O3氧化层。这些稳定的氧化层提高了涂层的耐腐蚀性。

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来源期刊

Materials and Corrosion-werkstoffe Und Korrosion 工程技术-材料科学：综合

CiteScore

3.70

自引率

11.10%

发文量

199

审稿时长

1.4 months

期刊介绍： Materials and Corrosion is the leading European journal in its field, providing rapid and comprehensive coverage of the subject and specifically highlighting the increasing importance of corrosion research and prevention. Several sections exclusive to Materials and Corrosion bring you closer to the current events in the field of corrosion research and add to the impact this journal can make on your work.