Enhancing Steam Oxidation Resistance of Ferritic Steels through Formation of Nickel Aluminide Diffusion Coatings at Low Temperatures

Abstract:

A nickel aluminide coating was formed on P92 steel substrate using a two step process of electro-Ni plating followed by pack aluminising at 650 °C. The coating was tested in 100% steam to assess its resistance against steam oxidation at 650 °C using a purpose-built rig for steam oxidation tests. The data obtained were compared with those measured from air oxidation test at the same temperature. It was revealed that steam is a more severe oxidising environment than air for the coating. Oxidation kinetics and degradation mechanisms affecting the lifetime of the coating were discussed.

• Periodical: Advanced Materials Research (Volumes 97-101)
• Pages: 1373-1376
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.97-101.1373
• Online since: March 2010
• Authors: Zhi Dong Xiang, S.R. Rose, Psantu K. Datta
• Keywords: Alloy Steel, Nickel Aluminide Coating, Pack Aluminising, Steam Oxidation Resistance

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