With the demand for high-fidelity coating involving metallic, multilayer,
protective, and ceramic-based coatings, deposition methods have been introduced to
achieve quality coatings. High temperatures cause erosion-corrosion wear, oxidation,
and hot corrosion in materials operating in corrosive conditions. Among the various
methods used to protect surfaces from deterioration, the method of applying coatings
by high-velocity oxy-fuel spraying deserves special mention because it creates coatings
with increased hardness and resilience, low (less than 1%) porosity, and high erosioncorrosion and wear resistances. Deposition of these coatings using a typical thermal
spray process finds applications in the protection of base material in automobile,
aerospace, orthopaedic, thermal power plant, and gas pipeline sectors. We present the
potentials of the coatings and their respective protective properties. This chapter
provides the optimization and overviews of the use of various recently used coating
materials developed for the application in automotive, power plant, defence, gas and
steam, and orthopaedic sectors.
Keywords: Automobile sector, Biomedical coatings, Ceramic material, Corrosion and wear resistance coatings, Gas turbine, Metallic coating, Multilayer, Optimization of coating material.
