Corrosion behaviour of alumina-forming heat resistant alloy with Ti in high temperature steam

Gokul Obulan Subramanian, Chaewon Kim, Woong Heo, Changheui Jang

Research output: Contribution to journalArticlepeer-review

Abstract

The corrosion behaviour of an alumina-forming heat resistant alloy with high Ti (Fe-35Ni-16Cr-4.5Al-3Ti, wt%) was evaluated in high temperature steam. The alloy developed interfacial α-Al2O3 layer during the pre-oxidation treatment in air at 750 °C. However, it formed external Cr2O3 and internal γ-Al2O3 oxides on the austenite matrix during the steam corrosion at 750 °C for 1000 h. This behaviour is attributed to the increased oxygen permeability into the austenite matrix from the synergistic effect of steam and Ti. Meanwhile, the pre-oxidized alloy with interfacial α-Al2O3 layer showed improved corrosion protection with reduced weight gain in steam environment.

Original languageEnglish
Article number110000
JournalCorrosion Science
Volume195
Early online date2 Dec 2021
DOIs
Publication statusPublished - Feb 2022

Bibliographical note

Funding Information:
This study was mainly supported by the Nuclear Research and Development Program (no. 2016R1A5A101391921 and 2019M2D2A2050927) of the MSIT/NRF of the Rep. of Korea. Financial support for two of the authors is provided by the BK-Plus Program of the National Research Foundation (NRF) of the Rep. of Korea. The supports from the KAIST Analysis Center for Research Advancement (KARA) are acknowledged.

Keywords

  • Alumina-forming alloy
  • High temperature corrosion
  • Internal oxidation
  • Pre-oxidation
  • Steam

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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