The development of thermal spray technologies as an integrated system, i.e. hardware and spray materials, has evolved to a state where thermal spray can be looked at as a viable method of corrosion control for application in pulping digesters. High Velocity Oxygen Fuel spray systems combined with new materials designed to have particularly good corrosion resistance, provide a superior barrier to solution penetration to substrates. Coating chemistries, micrographs of the corrosion samples and their description are presented.
Keywords: Thermal spray, HVOF, digester corrosion, metamorphic alloy C