Verfahren zur Herstellung von metallischen Gegenstaenden,insbesondere zur Verwendung als Muenzmetall,und nach dem Verfahren hergestellte Gegenstaende

摘要

1373065 Chromising ferrous substrates SHERRITT GORDON MINES Ltd 4 April 1972 [28 May 1971] 15538/72 Heading C7F An iron-base alloy substrate containing less than 0.03%C is chromised to give a 0.0002 to 0.003 inch Cr diffusion coating having 6 to 48% Cr at its outer surface. The chromising materials may be Cr, ferrochrome, CrCl 3 . 6H 2 O, ammonium and hydrogen chlorides, alumina or kaolin, and the temperature is at least 1850‹F.