Microstructure and corrosion properties of AlCrxNiCu0.5Mo (x=0, 0.5, 1.0, 1.5, 2.0) high entropy alloy coatings on Q235 steel by electrospark - Computer numerical control deposition

The AlCrxNiCu0.5Mo (x = 0, 0.5, 1.0, 1.5, 2.0) HEAs were prepared via arc melting. The x = 0 HEA is com-posed of BCC1 + BCC2, while x = 0.5, 1.0, 1.5 and 2.0 HEAs are comprised of FCC + BCC2. With the increase-ment of x, their brittleness decreases, while their plasticity increases. The HEA coatings were deposited using the as-cast HEA electrodes via electrospark - computer numerical control deposition. All HEA coatings contain BCC solid solution. The electrochemical corrosion test in 3.5%NaCl solution and salt spray corrosion test show that the produced HEA coatings can obviously improve the corrosion resistance of Q235 substrate. (C) 2021 Published by Elsevier B.V.

Automated summary

Different compositions of AlCrxNiCu0.5Mo (x = 0, 0.5, 1.0, 1.5, 2.0) high-entropy alloys were prepared and their coatings were deposited using electrospark - computer numerical control deposition. Experimental tests showed that the HEA coatings can significantly improve the corrosion resistance of Q235 substrate.