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JOM

, Volume 71, Issue 1, pp 109–115 | Cite as

Effect of Aluminizing on the High-Temperature Oxidation Behavior of an Alumina-Forming Austenitic Stainless Steel

  • S. Rashidi
  • J. P. Choi
  • J. W. Stevenson
  • A. Pandey
  • R. K. GuptaEmail author
Advancement in Solid Oxide Fuel Cell Research
  • 172 Downloads

Abstract

Due to their excellent oxidation resistance and creep resistance at elevated temperature, alumina-forming austenitic (AFA) stainless steels have emerged as potential alloys for high-temperature applications. In this study, a reactive air aluminizing method was used to aluminize the surface of AFA 25 stainless steel. The high-temperature oxidation behavior of both as-received and aluminized AFA 25 was investigated at 850°C in dry air. The mass gain per unit area was higher for aluminized AFA 25 than for as-received material. X-ray diffraction analysis, scanning electron microscopy, and energy-dispersive x-ray spectroscopy, performed on the oxide scales following high-temperature oxidation tests, confirmed formation of alumina scale on both as-received and aluminized AFA. However, the aluminized alloy exhibited a thicker alumina scale on the surface, as well as more extensive penetration of the scale into the subsurface region of the alloy.

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Department of Chemical and Biomolecular Engineering, Corrosion Engineering ProgramThe University of AkronAkronUSA
  2. 2.Pacific Northwest National LaboratoryRichlandUSA
  3. 3.LG Fuel Cell Systems Inc.North CantonUSA

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