Verfahren und Verwendung von Thermospritzmasken mit einem duroplastischen Epoxid-Überzug

摘要

Method of making a mask assembly by providing a heat resistance mask substrate (25) having an exposed surface (26) with a surface smoothness less than 2000 micro inches, uniformly spraying a thermoset epoxy organic coating (27) onto such exposed surface in one or more layers to provide a coating having (e.g., a thickness equal to or less than about .005 inches), a smoothness characterized by an average profilometer reading (Ra) of no greater than 1.5 micrometers, said coating being devoid of pores that exceed about 0003 inch in size, and flame polishing all or a portion of such coating to effect a surface finish of about 1.0 micrometers. A mask assembly which is useful in masking areas from thermal spray particles, comprising a heat resistance substrate presenting an exposed grit blasted surface having a smoothness of less than 2000 micro inches, and a thin thermoset epoxy coating bonded to said exposed surface and having a surface smoothness characterized by an average profilometer reading (Ra) no greater than 1.5 microns.