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Article Dans Une Revue Corrosion Science Année : 2023

Effect of chromium and silicon additions on the hot corrosion resistance of nickel aluminide coatings

Résumé

The effects of chromium and silicon modification on the microstructure and hot corrosion resistance of slurry aluminide coatings applied on pure nickel was studied by in-depth microscopic analyses. The simple and the Cr modified aluminide coatings provided limited protection in Type II hot corrosion conditions but the Si-modified coating exhibited outstanding resistance with no sign of attack after 300 h of isothermal exposure at 700 ◦C. The synergistic dissolution between NiO and Al2O3/Cr2O3 appears responsible for the onset of the corrosion attack for the simple and Cr-modified coatings while silicon is shown to extend the incubation period.

Domaines

Matériaux
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Dates et versions

hal-04458071 , version 1 (14-02-2024)

Identifiants

Citer

Benjamin Grégoire, Xabier Montero, Mathias Galetz, Gilles Bonnet, Fernando Pedraza. Effect of chromium and silicon additions on the hot corrosion resistance of nickel aluminide coatings. Corrosion Science, 2023, 224, pp.111517. ⟨10.1016/j.corsci.2023.111517⟩. ⟨hal-04458071⟩
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