Accession Number : AD0839475

Title :   FLAME AND PLASMA SPRAYED POLYMERIC PROTECTIVE COATINGS.

Descriptive Note : Summary technical rept. 1 Apr 67-31 Mar 68,

Corporate Author : MONSANTO RESEARCH CORP DAYTON OH DAYTON LAB

Personal Author(s) : Janowiecki, R. J. ; Willson, M. C.

Report Date : JUL 1968

Pagination or Media Count : 140

Abstract : Sprayed polyimide and polyester coatings were measured for hardness, adhesion, and surface roughness, and evaluated via thermal stability, salt fog resistance and reproducibility of coating properties. Coatings of polyimide prepolymer pigmented with zinc, zinc oxide or aluminum were produced by plasma spraying on a variety of flat plate substrates. Good thermal stability was observed with polyimide coatings plasma sprayed on PH 15-7 Mo stainless steel at 650F in air. While salt fog resistance was not completely satisfactory, the coatings had good hardness and adhesion after exposure. Improved unpigmented polyester coatings and polyester coating pigmented with zinc, zinc oxide, and strontium molybdate were also produced via the plasma-spraying technique. Good reproducibility was obtained in plasma-sprayed coating properties. Polyester coatings were made with pencil hardnesses of H and good adhesion. A study was made to determine the feasibility of predicting coating properties from a knowledge of the plasma-spray process variables and fundamental polymer properties. (Author)

Descriptors :   *FLAME SPRAYING), (*PLASTIC COATINGS, HEAT RESISTANT PLASTICS, IMIDES, POLYMERS, POLYESTER PLASTICS, PLASMA JETS, SPRAYS, HARDNESS, ADHESION, SURFACE ROUGHNESS, THERMAL STABILITY, SALT SPRAY TESTS, PIGMENTS, AIRCRAFT FINISHES.

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE