Investigation of diamond-like carbon coated steel corrosion: Enhancing the optical detection of defects by a controlled electrochemical activation
| Autor: | Roland Oltra, Cédric Jaoul, O. Jarry, C. Le Niniven, Frederic Meunier, T. Maerten, Pascal Tristant |
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| Přispěvatelé: | Institut de Recherche sur les CERamiques (IRCER), Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Diamond-like carbon 02 engineering and technology engineering.material Electrochemistry law.invention Corrosion [SPI.MAT]Engineering Sciences [physics]/Materials Optical microscope Coating law Electrical resistivity and conductivity Materials Chemistry Thin film Composite material Dissolution ComputingMilieux_MISCELLANEOUS 020502 materials Surfaces and Interfaces General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films 0205 materials engineering engineering 0210 nano-technology |
| Zdroj: | Surface and Coatings Technology Surface and Coatings Technology, Elsevier, 2019, 363, pp.344-351. ⟨10.1016/j.surfcoat.2019.02.050⟩ Surface and Coatings Technology, 2019, 363, pp.344-351. ⟨10.1016/j.surfcoat.2019.02.050⟩ |
| ISSN: | 0257-8972 1879-3347 |
| Popis: | It is often reported that DLC thin films have good corrosion properties due to chemical inertness and low electrical conductivity. Nevertheless, the performance of these coating is highly sensitive to the presence of growth defects. An in situ optical microscopy coupled to an electrochemical test was then developed to evaluate corrosion protection performance of DLC coated steel. A square wave voltammetry was applied to increase the sensitivity of electrochemical techniques based on the detection of the dissolution of the bare metal surface triggered by the presence of uncoated spots due to inherent defects. With this in situ electrochemical test, a clear improvement in optical detection “natural” defects is obtained. SEM coupled with FIB milling technique was used to generate artificial defects with controlled dimensions down to 2.5 μm diameter to define the sensitivity of the proposed counting procedure. Results showed that it was possible to detect cylindrical defects with diameter down to 2.5 μm. Moreover, the electrochemical approach allowed to characterize the propagation of the damage under the DLC coatings. |
| Databáze: | OpenAIRE |
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