Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)

Carbonation-corrosion resistant behaviour of corrosion-resistant steel Cr10Mo1 and its protection mechanism

Authors
Z.Y. Ai, J.Y. Jiang, W. Sun, D. Song, H. Ma, J.C. Zhang
Corresponding Author
Z.Y. Ai
Available Online October 2016.
DOI
https://doi.org/10.2991/iccahe-16.2016.70How to use a DOI?
Keywords
Corrosion-resistant steel; Carbonation; Passive film; Mechanism
Abstract

The electrochemical response of new alloy corrosion-resistant steel Cr10Mo1 passivated under attack of carbonation (pH from 13.3 to 9.0), was evaluated by electrochemical techniques (linear polarization resistance, and electrochemical impedance spectroscopy). X-ray photoelectron spectroscopy (XPS) was used to characterize the composition and structure of the surface film on the steel. The results show that as carbonation progressing, the corrosion-resistant steel never goes to corrosion domain even when pH falls to 9.0,but has an increasing corrosion resistance. According to XPS analysis, the passive film on the corrosion-resistant steel presents a bilayer structure: an outer layer enriched in Fe oxides and hydroxides, and an inner layer rich in Cr species. As the pH decreases, Fe oxides gradually decompose while more stable and protective Cr oxides get enriched in the film. Under carbonation attacking, the increasing Cr oxides in the film act as a protection barrier to the steel corrosion and support the corrosion-resistant steel still good passivity.

Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)
Series
Advances in Engineering Research
Publication Date
October 2016
ISBN
978-94-6252-250-3
ISSN
2352-5401
DOI
https://doi.org/10.2991/iccahe-16.2016.70How to use a DOI?
Copyright
© 2016, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Z.Y. Ai
AU  - J.Y. Jiang
AU  - W. Sun
AU  - D. Song
AU  - H. Ma
AU  - J.C. Zhang
PY  - 2016/10
DA  - 2016/10
TI  - Carbonation-corrosion resistant behaviour of corrosion-resistant steel Cr10Mo1 and its protection mechanism
BT  - Proceedings of the 2016 5th International Conference on Civil, Architectural and Hydraulic Engineering (ICCAHE 2016)
PB  - Atlantis Press
SP  - 404
EP  - 412
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccahe-16.2016.70
DO  - https://doi.org/10.2991/iccahe-16.2016.70
ID  - Ai2016/10
ER  -