| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Grégoire, Benjamin
University of Birmingham
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2023Resistance of slurry aluminide coatings on pure nickel under different sulphidizing/Hot corrosion conditions at 700 °Ccitations
- 2023Effect of chromium and silicon additions on the hot corrosion resistance of nickel aluminide coatingscitations
- 2021Improving the corrosion resistance of ferritic-martensitic steels at 600 °C in molten solar salt via diffusion coatingscitations
- 2021Corrosion performance of slurry aluminide coatings in molten NaCl–KClcitations
- 2020Corrosion mechanisms of ferritic-martensitic P91 steel and Inconel 600 nickel-based alloy in molten chlorides. Part I: NaCl–KCl binary systemcitations
- 2020Long-term corrosion behavior of Cr diffusion coatings on ferritic-martensitic superheater tube material X20CrMoV12-1 under conditions mimicking biomass (co-)firingcitations
- 2020High Temperature Oxidation of Slurry Aluminized Deformable Austempered Ductile Iron (DADI)citations
- 2019Development of a new slurry coating design for the surface protection of gas turbine componentscitations
- 2019Mechanisms of formation of slurry aluminide coatings from Al and Cr microparticlescitations
- 2019Correlations between the kinetics and the mechanisms of hot corrosion of pure nickel at 700 °Ccitations
- 2019Dissolution and passivation of aluminide coatings on model and Ni-based superalloycitations
- 2019Scale Formation and Degradation of Diffusion Coatings Deposited on 9% Cr Steel in Molten Solar Saltcitations
- 2018Mechanisms of hot corrosion of pure nickel at 700°C: Influence of testing conditionscitations
- 2017Oxidation performance of repaired aluminide coatings on austenitic steel substratescitations
- 2017Reactivity of Al-Cr microparticles for aluminizing purposescitations
- 2016Influence of the oxide scale features on the electrochemical descaling and stripping of aluminide coatingscitations
Places of action
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article
Oxidation performance of repaired aluminide coatings on austenitic steel substrates
Abstract
The repairability of slurry aluminide coatings on austenitic stainless steels (ASS) and their oxidation behaviour were investigated in this work. Slurry aluminide coatings were deposited on IN-800HT and HR3C substrates to obtain a B2-(Fe,Ni)Al phase. Chemical stripping of the coatings was thereafter conducted with diluted nitric acid. Dissolution occured at the interface between the diffusion and interdiffusion layers of the coating due to the penetration of the nitric solution through the tensile cracks of the coatings. The greater the NiAl content in such interface the greater the dissolution. This was proved by thermodynamic calculations and experimentally with model NiAl and FeAl. Realuminization of the stripped samples resulted in somewhat thicker coatings with similar microstructures as the fresh ones. The oxidation behaviour of the fresh and the repaired coatings was compared under isothermal conditions (650 °C and 700 °C for, respectively, the IN-800HT and HR3C alloys) in air for 2000 h. The loss of Cr from the surface of the coatings and the delayed transformation of the aluminas suggest that there was some chromium evaporation. However, the oxidation behaviour was similar on the new and the repaired coatings. The oxidation kinetics appeared to follow a parabolic law for the HR3C samples. The coatings grew very thin Al2O3 oxide scales at the coating/gas interface but some spallation occurred in IN-800HT. It thus appears that the slurry aluminide coatings can be repaired and supply protection to ASS in air at 650 and 700 °C.