Variation of carbon steel corrosion rate with flow conditions in the presence of an inhibitive formulation
| Autor: | Nakarin Srisuwan, Nadine Pébère, Nathalie Ochoa, Bernard Tribollet |
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| Přispěvatelé: | Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Laboratoire Interfaces et Systèmes Electrochimiques (LISE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Work (thermodynamics)
Electrochemical impedance Materials science Corrosion rate Carbon steel General Chemical Engineering Matériaux Metallurgy A. Mild steel General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry engineering.material Corrosion Anode Metal Flow conditions visual_art Electrode visual_art.visual_art_medium engineering General Materials Science Current (fluid) Composite material |
| Zdroj: | Corrosion Science Corrosion Science, 2008, 50 (5), pp.1245-1250. ⟨10.1016/j.corsci.2008.01.029⟩ |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2008.01.029⟩ |
| Popis: | International audience; This work is an extension of studies into the mechanism of inhibition of a carbon steel by a non-toxic multicomponent inhibitor (fatty amines associated with phosphonocarboxylic acid salts) used for the treatment of water in cooling circuits. In a previous work [N. Ochoa, F. Moran, N. Pébère, B. Tribollet, Corros. Sci. 47 (2005) 593], it was shown that the properties of the protective layers formed on the metal surface were dependent on the electrode rotation rate. Moreover, two distinct surface areas were visualised on the metal surface and the ratio between the two zones was dependent on the flow conditions. The present study focuses on the measurement of the corrosion rate from impedance diagrams obtained at the corrosion potential for different electrode rotation rates. The measured polarisation resistances correspond to the anodic process. A non-monotonic variation of the corrosion current densities was observed and explained by the variation of the ratio between the two layers, which each have different intrinsic protective properties. From the polarisation curves plotted in the same conditions, the non-monotonic variation was not shown. Independently of the electrode rotation rate, the corrosion current densities remained low. This study brought an original approach to the influence of flow on the corrosion rate in the presence of inhibitors. |
| Databáze: | OpenAIRE |
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