Kinetics of Iron and Aluminum Oxidation by Oxygen
Rept. no. 1 (Annual) 1 Jun 1970-31 May 1971
AEROCHEM RESEARCH LABS INC PRINCETON NJ
Pagination or Media Count:
Because of the need for quantitative information on gaseous metal atom oxidation kinetics, an experimental research program has been initiated to determine the mechanism and rate coefficients of the homogeneous reactions of free Fe and Al atoms with O2. The apparatus used is a cylindrical fast-flow reactor, adapted for the study of the kinetics of refractory gaseous species at temperatures up to 1900 K. The FeO2 reaction at 1600 K was investigated in N2 O2 flows by observing the rate of decay of Fe-atom concentrations, measured in absorption, at pressures from 15 to 60 Torr. The gas phase reaction has been determined to be Fe O2 yields FeO O, with a rate coefficient k sub 24 x 10 to the minus 13 power mlmoleculesec. This result is estimated to be accurate to within a factor of about 2. Evidence for heterogeneous oxidation of Fe in the presence of O2 has also been obtained the lower limit for the probability of Fe oxidation per collision with the reactor wall, is found to be on the order of 1 10.
- Physical Chemistry
- Metallurgy and Metallography