Elemental Additions on Corrosion Resistance of High Entropy Alloy Coatings on Stainless Steel Fabricated via Laser-Based Methods: A Review

High entropy alloys have attracted significant attention due to their exceptional corrosion resistance, which makes them excellent candidates for protective coatings on stainless steel substrates. This review critically examines the corrosion behavior of high entropy alloy coatings applied to stainless steel using various laser-based fabrication techniques. The focus is on the role of elemental and ceramic additions in enhancing the corrosion resistance of these coatings. By analyzing recent studies in detail, the review explores the synergistic effects of different elements on the microstructure, phase formation, and electrochemical performance of high entropy alloy coatings fabricated by various laser-based methods on different stainless steel substrates. The aim of this review is to provide insights into optimizing high entropy alloy coating compositions through laser fabrication processes to achieve superior corrosion-resistant coatings, thereby extending the service life of stainless steel components in corrosive environments.