Accession Number : AD0722006

Title :   Substrate Corrosion of Plasma Coated Surfaces.

Descriptive Note : Technical rept.,

Corporate Author : MECHANICAL TECHNOLOGY INC LATHAM N Y

Personal Author(s) : Calabrese,Salvadore J. ; Pan,Coda H. T.

Report Date : FEB 1971

Pagination or Media Count : 21

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)

Descriptors :   (*CORROSION INHIBITION, COATINGS), (*BEARINGS, CORROSION INHIBITION), SUBSTRATES, FLAME SPRAYING

Subject Categories : Coatings, Colorants and Finishes
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE