Fundamental studies on the thin film deposition of ceramics were carried out for the inner surface of short tubings in order to get high corrosion and erosion resistance. Inner surface of short tubings was coated by multilayer of Al2O3/TiN/TiC by plasma CVD. Conventional evaluation tests were carried out regarding to their erosion and corrosion resistance.

In order to remove the pinholes in the deposited films, the surface roughness of base material was improved by polishing and metal Cr layer was plated.

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