Laser additive synthesis of high entropy alloy coating on aluminum: Corrosion behavior

• We report laser additive synthesis of high entropy alloy coating.
• Effect of multilayered coating on dilution and corrosion has been investigated.
• Multilayered coating deposited with higher energy input minimized dilution effect.
• Corrosion resistance improved with multilayered coating.

High entropy alloy coatings were synthesized on aluminum substrate by laser surface engineering. Dilution from the substrate was minimized with the aid of multi layered coatings. Furthermore, higher laser input energy during processing lead to uniform mixing amongst the components resulting in formation of evenly distributed high entropy alloy phases throughout the matrix. This resulted in enhanced corrosion resistance for the coatings in near neutral NaCl solution.