Abstract

Hot corrosion is a critical challenge in the designing and functioning of coal-based power plants, gas turbines and steam turbines. The economic loss due to hot corrosion is very high. Many researchers are working to combat hot corrosion, but only a few researchers have reduced hot corrosion to some extent by various surface modification techniques. However, coatings deposited by the thermal spray process offer better results in combating hot corrosion. Thermal spray techniques are a promising way to apply dense, defect-free adherent coatings to components, increasing both their performance and lifetime. Thus, the core objective of this chapter is to provide a review of different thermal spray coating methods, coating materials, advantages, and disadvantages. Finally, the most recent industrial advances in thermal spray technologies to combat corrosion in high-temperature applications are provided.