STEEL PIECE HAVING HARD AND ANTIICORROSIVE SURFACE

摘要

1361427 Coating steel with protective layers LABORATOIRE SUISSE DE RECHERCHES HORLOGERES and CIBA-GEIGY AG 1 Oct 1971 [2 Oct 1970] 45778/71 Heading C7F Steel is coated by gas phase reactions with an intermediate layer of Cr, and then an outer layer of Ti carbide. The intermediate Cr layer may be deposited from chromium trichloride or the reaction product of gaseous hydrogen chloride or chlorine and Cr. TiC can be deposited using TiCl 4 with methane, acetylene, ethylene or dicyclopentadiene.