A novel ZrCrMoNb high-entropy alloy coating was prepared on 3A21 aluminum alloy and its corrosionbehavior in ethylene glycol solution was studied. By polarization curve, electrochemical impedancespectroscopy (EIS) and scanning electron microscope (SEM), the effects of temperature andconcentration of ethylene glycol on corrosion behavior of ZrCrMoNb high-entropy alloy coatings wereanalyzed. The results show that the corrosion resistance of ZrCrMoNb high-entropy alloy coatingdegraded with the increase of temperature, and the corrosion current density of ZrCrMoNb high-entropyalloy coating in ethylene glycol solution decreases significantly when the V/V concentration ethyleneglycol changes from 15% to 30%, after that, the corrosion current density changed little with the increaseof ethylene glycol concentration. Scanning electron microscope results display that the coating canimprove the pitting corrosion resistance of 3A21 aluminum alloy in ethylene glycol solution.
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