Substrate Corrosion of Plasma Coated Surfaces.
MECHANICAL TECHNOLOGY INC LATHAM N Y
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To use a hard coating surface in a chemically active environment such as steam-lubricated bearings, it is important to prevent substrate corrosion. It is believed that coating porosity permitting entrapment of the condensate water may be responsible for the initiation of corrosion in a substrate containing chrome and carbides. This phenomenon was experienced on a shaft in storage several months after it was used in tests. A small scale investigation consisting of controlled experimentation on twelve hard coating specimens substantiated this explanation. The same investigation also showed that the use of a non-corrosive, non-porous undercoat which has an adequate bonding strength with both the substrate and the hard coating is effective in suppressing the problem. Author
- Coatings, Colorants and Finishes
- Manufacturing and Industrial Engineering and Control of Production Systems