Influence of Creep Deformation on the Corrosion Behaviour of a CeO sub 2 Surface-Modified Alloy 800H in a Sulphidising--Oxidising--Carburising Environment

Influence of Creep Deformation on the Corrosion Behaviour of a CeO sub 2 Surface-Modified Alloy 800H in a Sulphidising--Oxidising--Carburising Environment

The corrosion behaviour of a CeO sub 2 surface-modified pre-oxidised wrought austenitic steel of the type Fe--20Cr--32Ni (Alloy 800H) was studied in a simulated coal gasification atmosphere at 700 deg C for exposure times up to 3000 h. The influence of creep deformation on the corrosion resistance o...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1989-05, Vol.A120-A121, p.581-587
Hauptverfasser: Stroosnijder, M F, Guttmann, V, Gommans, R J N, de Wit, J H W
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container_title Materials science & engineering. A, Structural materials : properties, microstructure and processing
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creator Stroosnijder, M F
Guttmann, V
Gommans, R J N
de Wit, J H W
description The corrosion behaviour of a CeO sub 2 surface-modified pre-oxidised wrought austenitic steel of the type Fe--20Cr--32Ni (Alloy 800H) was studied in a simulated coal gasification atmosphere at 700 deg C for exposure times up to 3000 h. The influence of creep deformation on the corrosion resistance of this material was assessed by comparison with its behaviour in the stress-free condition. The significant improvement in the corrosion resistance of Alloy 800H due to the CeO sub 2 treatment can be decreased by creep deformation. Both strain and strain rate govern the cracking behaviour of the pre-formed protective oxide layer, leading to enhanced internal and external attack. The preformed oxide layer tends to rupture at a lower strain with increasing strain rate. Graphs, Photomicrographs. 26 ref.--AA
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title Influence of Creep Deformation on the Corrosion Behaviour of a CeO sub 2 Surface-Modified Alloy 800H in a Sulphidising--Oxidising--Carburising Environment
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