On the Oxidation Kinetics of Alumina- and Chromia-Forming Alloys: Growth of Scale with the Change of Reaction Area

Authors

  • Irakli Nakhutsrishvili Institute of Cybernetics, Georgian Technical University, Georgia.
  • Revaz Kokhreidze Institute of Cybernetics, Georgian Technical University, Georgia.
  • Giorgi Kakhniashvili Institute of Cybernetics, Georgian Technical University, Georgia.
  • Irakli Javakhishvili Institute of Cybernetics, Georgian Technical University, Georgia.

DOI:

https://doi.org/10.9734/bpi/pcsr/v9/18977D

Keywords:

Oxidation kinetics, diffusion barriers, alumina, chromia

Abstract

On the basis of Evans’ conceptual theory, a new equation of the growth of scale with the change of the reaction area  has been tested and formulas obtained that allow constructing the kinetic curves of oxidation both for specific heat-resistant alloys (FeCr, FeCrAl) and for possible, hypothetical objects of research.

The study of the oxidation processes of alloys FeCr(La) and FeCrAl(La) in air at \(1200-1400^{\circ}\) shows the deviation of the oxidation kinetics from parabolic. This is due to the presence of diffusion barriers from lanthanum chromite LaCrO3 in the scale. The processes of high-temperature oxidation of FeCr(Y) and FeCr(Ce) alloys are also considered.

Published

2023-05-29

How to Cite

Irakli Nakhutsrishvili, Revaz Kokhreidze, Giorgi Kakhniashvili, & Irakli Javakhishvili. (2023). On the Oxidation Kinetics of Alumina- and Chromia-Forming Alloys: Growth of Scale with the Change of Reaction Area. Progress in Chemical Science Research Vol. 9, 175–186. https://doi.org/10.9734/bpi/pcsr/v9/18977D

Issue

Progress in Chemical Science Research Vol. 9

Section

Chapters