Oxidation and Chromium Volatilisation of AISI 430 Stainless Steel in O₂-H₂O and Ar-CO₂-H₂O at 800°C

Abstract:

To investigate the behaviour of oxidation and chromium volatilisation, AISI 430 stainless steel was oxidised in O₂-H₂O and Ar-CO₂-H₂O atmospheres for 96 h at 800°C with varying water vapour content. In the O₂-H₂O environment, the volatilisation rate of Cr and Mn increased as the water vapour content increased from 5% to 20%. In the case of Ar-CO₂-H₂O conditions, the presence of water vapour in the Ar-20%CO₂ environment reduced the oxidation rates of the steel. However, increasing the H₂O content in Ar-20%CO₂ had an insignificant effect on the oxidation rate. Water vapour was found to accelerate the volatilisation rate of Cr and Mn. Breakaway oxidation occurred in Ar-20%CO₂-40%H₂O, resulting in the highest volatilisation rates of Cr and Mn.

• Periodical: Materials Science Forum (Volume 1101)
• Pages: 71-78
• DOI: https://doi.org/10.4028/p-rYw6Jb
• Online since: October 2023
• Authors: Padungaut Srihathai, Supreeya Chaicharoen, Niramon Yamdee, Tanatorn Keawchusaeng, Panya Wiman, Watcharapon Tengprasert, Thammaporn Thublaor*
• Keywords: Oxidation, Stainless Steel, Volatilisation

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