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Bioxidant corrosion behaviour of CoNiCrAlY coated IN738 at 1100 °C

Chen, H.; Hou, X.; He, J.; Guo, H.

Bioxidant corrosion behaviour of CoNiCrAlY coated IN738 at 1100 °C Thumbnail


Authors

H. Chen

X. Hou

J. He

H. Guo



Abstract

This paper investigates the bioxidant corrosion behaviour of CoNiCrAlY coated IN738 at 1100 °C. Free-standing CoNiCrAlY coatings and CoNiCrAlY coated IN738 were isothermally oxidised in air at 1100 °C for periods up to 100 h. It is found that the bioxidant corrosion occurred in the coated IN738 samples, in which the β phases in the CoNiCrAlY coating were significantly consumed by internal oxidation and internal nitridation. Aluminium nitrides and titanium nitrides were found to exist in the CoNiCrAlY coating after bioxidant corrosion. The internal nitridation is likely to occur when no protectives oxides can form at the coating surface.

Citation

Chen, H., Hou, X., He, J., & Guo, H. (2019). Bioxidant corrosion behaviour of CoNiCrAlY coated IN738 at 1100 °C. Corrosion Science, 151, 154-162. https://doi.org/10.1016/j.corsci.2019.02.014

Journal Article Type Article
Acceptance Date Feb 11, 2019
Online Publication Date Feb 19, 2019
Publication Date May 1, 2019
Deposit Date Mar 19, 2019
Publicly Available Date Feb 20, 2020
Journal Corrosion Science
Print ISSN 0010-938X
Electronic ISSN 1879-0496
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 151
Pages 154-162
DOI https://doi.org/10.1016/j.corsci.2019.02.014
Keywords CoNiCrAlY; IN738; Bioxidant corrosion; Internal nitridation; β-phase depletion
Public URL https://nottingham-repository.worktribe.com/output/1583775
Publisher URL https://www.sciencedirect.com/science/article/pii/S0010938X18316883
Contract Date Mar 20, 2019

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