Effect of annealing temperature on the corrosion behavior of duplex stainless steel studied by in situ techniques
Article
Article Title | Effect of annealing temperature on the corrosion behavior of duplex stainless steel studied by in situ techniques |
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ERA Journal ID | 4761 |
Article Category | Article |
Authors | Guo, L. Q. (Author), Li, M. (Author), Shi, X. L. (Author), Yan, Y. (Author), Li, X. Y. (Author) and Qiao, L. J. (Author) |
Journal Title | Corrosion Science |
Journal Citation | 53 (11), pp. 3733-3741 |
Number of Pages | 9 |
Year | 2011 |
Publisher | Elsevier |
Place of Publication | Oxford, United kingdom |
ISSN | 0010-938X |
1879-0496 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.corsci.2011.07.019 |
Abstract | The effects of the annealing temperature on the microstructure and the corrosion behavior of duplex stainless steel 2507 were investigated by means of magnetic force microscopy (MFM), scanning Kelvin probe force microscopy (SKPFM), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The SEM results indicated that the volume fraction of the austenite phase decreased with the increased annealing temperature. SKPFM/MFM measurements conducted in air at the room temperature and an ambient relative humidity of about 25% showed a higher Volta potential of the paramagnetic austenite than that of the ferromagnetic ferrite. The in situ AFM observation in a hydrochloric acid solution provided solid evidence that corrosion preferentially occurred in the ferrite phase. The sample annealed at 1100 °C exhibited a greater Volta potential difference between the ferrite and austenite and a higher corrosion rate in the ferrite, while that annealed at 1150 °C had a smaller Volta potential difference and a lower corrosion rate. The relative nobility and microstructure change of two phases, as well as their corrosion behavior, can be explained by the effect of the composition of alloying elements. |
Keywords | stainless steel; AFM: acid corrosion |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of Science and Technology Beijing, China |
China National Petroleum Corporation, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5w23/effect-of-annealing-temperature-on-the-corrosion-behavior-of-duplex-stainless-steel-studied-by-in-situ-techniques
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