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Plasma spray can be used to produce coatings. of virtually any metallic, cermet, or ceramic ma-. terial. The coatings are used for most of the types. of applications described in a subsequent section. The transferred plasma-arc process adds to. plasma spray the capability of substrate surface heat-. ing and melting. Figure 7 is a schematic repre-. sentation of the process.
Phenolic coatings offer consistent high quality protection for a wide range of applications including immersion service for most acids, solvents, and salts. This epoxy phenolic coating is typically used where low pH environments and higher temperatures are factors.