Abstract

This review examines recent research on chromium and chromium-based coatings for superalloys, focusing on their application methods and protective mechanisms in extreme environments. The study explores diffusion coatings, particularly the pack cementation method, and overlay coatings applied through thermal spraying techniques. The formation of protective Cr2O3 oxide scales and the role of chromium in enhancing oxidation and corrosion resistance are discussed. The review also addresses the challenges and limitations of chromium coatings, including the need for precise control of chromium content. Finally, it highlights the importance of selecting appropriate coating methods based on specific application requirements and environmental conditions.

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