The Effect of Boron on the Corrosion Resistance of the High Entropy Alloys Al[sub 0.5]CoCrCuFeNiB[sub x]

High entropy alloys are a newly developed family of multicomponent alloys that consist of various major alloying elements, including copper, nickel, aluminum, cobalt, chromium, iron, and others. Each element in the alloy system is present at between 5 and . A high entropy alloy has numerous beneficial mechanical, magnetic, and electrochemical characteristics. This investigation discusses the corrosion resistance of the alloys with various amounts of added boron. Surface morphological and chemical analyses verified that the addition of boron produced , , and borides. Therefore, the fraction of outside borides precipitates was scant. The anodic polarization curves and electrochemical impedance spectra of the alloys, obtained in aqueous solution, clearly reveal that the general corrosion resistance decreases as the concentration of boron increases.