Study on Corrosion Resistance of High-Entropy Alloys NiCoCrFeMnCuC in Medium Acid Liquid

Abstract

High-entropy alloy of NiCoCrFeMnCuC were made by vacuum non-consumable arc furnace in the present work. The crystal structure of NiCoCrFeMnCuC was analyzed by XRD. The corrosion resistance of NiCoCrFeMnCuC in 10%HNO3-3%HF, 10%H2SO4, 5%HCl and 10%HF was investigated, respectively with weight loss experiment. The results show that main intermetallics of the alloy are CoCx, FeNi3 and Fe3Mn7. The NiCoCrFeMnCuC has simple crystal structures with face-centered cubic crystal structure FCC and Quartet and has excellent corrosion resistance in some medium acid liquids.

A review on wear, corrosion, and wear-corrosion synergy of high entropy alloys

“…Besides manganese (Mn), Liu et al [ 91 ] added Cu and C to the CrFeCoNi system and investigated the corrosion resistance of the CrFeCoNiMnCuC HEA. After four days of immersion in various acid environments, the weight loss of the alloy was only 3% in 10% nitric acid liquid mixed with 3% of hydrogen fluoride, 0.3% in 10% sulfuric acid liquid, 0.6% in 5% hydrochloric acid liquid and only 0.64% in 10% hydrogen fluoride liquid.…”

Microstructures and Wear Resistance of Al_1.5CrFeNiTi_0.5and Al_1.5CrFeNiTi_0.5W_0.5 High Entropy Alloy Coatings Manufactured by Laser Cladding

“…High entropy alloys (HEAs), contain a variety of major elements, whose number is generally greater than 5, and the mole fraction is between 5% and 35% [1]. The HEAs show many excellent performances, for instance, high strength, wear resistance and corrosion stability [2][3][4][5][6], etc. Especially wear is a popular phenomenon not only in the daily life but also in industrial production, so the study of it is particularly significant.…”