S.A.Krokhmal', T.N.Zueva
Received February 3, 1999
The possibility of the protective chromium-carbide coating
deposition onto internal cylindrical surfaces of several mm diameters
and processed channel length of several tens mm has been studied.
The coatings were deposited from the gas phase using the organochromium
liquid BARKhOS as the reagent. It has been found that the process
under study makes it possible to improve the surface finish class.
The deposition rate achieved in the experiments is 5 mum/min.
The coating non-uniformity along the processed channel is less than
10 %. Coatings obtained exhibit a high corrosion resistance. Operating
lifetime of pressing tools (matrices used in synthetic drugs production)
is 3-6 times.