Accession Number:

AD0722006

Title:

Substrate Corrosion of Plasma Coated Surfaces.

Descriptive Note:

Technical rept.,

Corporate Author:

MECHANICAL TECHNOLOGY INC LATHAM N Y

Report Date:

1971-02-01

Pagination or Media Count:

21.0

Abstract:

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

Subject Categories:

  • Coatings, Colorants and Finishes
  • Manufacturing and Industrial Engineering and Control of Production Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE