Accession Number : AD0697445

Title :   THE EFFECT OF OXYGEN PRESSURE ON THE OXIDATION OF IRON AT 350 AND 400C,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Graham,M. J. ; Cohen,M.

Report Date : 01 JUL 1969

Pagination or Media Count : 8

Abstract : A kinetic study has been made of the effect of oxygen pressure 0.000001 to 60 Torr) on the oxidation of Ferrovac E iron at 350 and 400C. The initial rate of oxidation is found to increase with increasing oxygen pressure, while after 180 min the weight gain is independent of pressure. Initially Fe3O4 forms on the surface, and once this is covered by a continuous layer of alpha Fe2O3 the oxidation rate is markedly reduced. The lower the oxygen pressure, the longer the time before alpha Fe2O3 starts to nucleate, and no alpha Fe2O3 is observed after oxidation at very low pressures. An induction period is observed for the oxidation at 0.00005 Torr. (Author)

Descriptors :   (*IRON, *OXIDATION), PRESSURE, OXYGEN, IRON OXIDES, REACTION KINETICS, ELECTRON MICROSCOPY, SURFACE PROPERTIES, CANADA

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE