Degradation of aluminide coatings in Fe-Al-Cr alloy on the isothermal oxidation

L. Juwita, D. H. Prajitno, J. W. Soedarsono, Azwar Manaf

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Fe base superalloy has a good mechanical strength to be used as component operating at high temperature with oxidative environment. Although, the oxidation rate can not be tolerated as it will be oxidized and form oxide scale of un-protective FeO. Coating is a proper solution that this alloy can be used at high temperature. In this research, pack aluminizing on sample was conducted with temperatures of 900°C, 1000°C and 1100°C for 10 hours in inert (argon) environment and then an oxidation test was carried out at temperature of 650°C by an isothermal method for 10 hours in air environment. It was carried out an analysis for characteristics of coating and oxide scale formed in Fe-Al-Cr super alloy resulted from pack aluminizing. From this experiment, it was indicated by XRD analysis that the coating formed on substrate was a layer of FeAl2 compound, other than coating it was found a diffused zone, where in this area it occurred movement of Fe and Cr atoms from substrate toward coating, while Al atoms moved from coating to substrate. The increase of temperature of pack aluminizing process will affect settling rate of Al and coating growth.

Original languageEnglish
Title of host publicationNeutron and X-Ray Scattering in Materials Science and Biology - Proceedings of the International Conference on Neutron and X-Ray Scattering 2007
Number of pages4
Publication statusPublished - 2008
EventInternational Conference on Neutron and X-ray Scattering 2007, ICNX 2007 - Serpong and Bandung, India
Duration: 23 Jul 200731 Jul 2007

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


ConferenceInternational Conference on Neutron and X-ray Scattering 2007, ICNX 2007
CitySerpong and Bandung


  • Isothermal oxidation
  • Pack aluminizing
  • Superalloy


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