The effects of Cr/Mo micro-alloying on the corrosion behavior of carbon steel in CO2-saturated (Sweet) brine under hydrodynamic control
| Author | Sk, M. Hassan |
| Author | Abdullah, A. M. |
| Author | Qi, J. |
| Author | Ko, M. |
| Author | Ingham, B. |
| Author | Laycock, N. |
| Author | Ryan, M. P. |
| Author | Williams, D. E. |
| Available date | 2025-07-21T04:19:02Z |
| Publication Date | 2018 |
| Publication Name | Journal of the Electrochemical Society |
| Resource | Scopus |
| Identifier | http://dx.doi.org/10.1149/2.1011805jes |
| ISSN | 1945-7111 |
| Abstract | The effects of micro-alloying of plain carbon steel with Cr and Mo on the corrosion behavior in CO2-saturated (sweet) brine (0.5 M NaCl, pH 6.6) environment, under hydrodynamic conditions, at 80°C were investigated. Crystalline siderite/chukanovite scales formed on all the alloys. Analysis of potentiostatic current transient data suggest that there exists a synergistic interaction between Cr and Mo, which induces more rapid crystallization of the scale compared to Mo-free steels. Increasing the Mo content also suppressed the transport-dependent dissolution current passing through the initially-present amorphous surface film. TEM images of the FIB-sectioned corrosion scales confirm that the corrosion scale formed on 1Cr0.7Mo is comparatively thinner and yet offers greater protectiveness when compared to the plain carbon steel. |
| Sponsor | This work was supported by Qatar National Research Fund (QNRF, a member of the Qatar Foundation) through National Priority Research Program (NPRP) grant, Project No. NPRP 7-146-2-072. Although QNRF sponsored this project, it neither endorses nor rejects the findings of this research. MPR currently holds a RAEng/Shell Research Chair. DEW acknowledges support from the MacDiarmid Institute for Advanced Materials and Nanotechnology, NZ. |
| Language | en |
| Publisher | Electrochemical Society Inc. |
| Subject | Micro-alloying effects Carbon steel corrosion Cr and Mo alloying Siderite/chukanovite scale formation Corrosion scale protectiveness |
| Type | Article |
| Pagination | C278-C288 |
| Issue Number | 5 |
| Volume Number | 165 |
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