A Review on Tribological and Corrosion Behaviour of Thermal Spray Coatings

Traditional steels and alloys face challenges in resisting high-temperature oxidation and corrosion, especially as boilers are operated at elevated temperatures. This issue has become increasingly serious. Consequently, the surface modification of materials becomes crucial to protect against various forms of degradation and enhance component's operational performance while minimising costs. In recent years, numerous researchers have explored methods to reduce the hot corrosion of boiler steels, with a particular focus on surface coatings. Surface modification techniques such as thermal spray coating, electroplating, and other metallurgical approaches are commonly employed. The use of composite coatings on steel has grown in popularity as a possible way to enhance the material's mechanical, metallurgical, erosion, and heat-resistant qualities. This review paper has reported an in-depth and critical analysis of the existing literature, focusing on various thermal spray coatings and their applications.