A silane pre-treatment for improving corrosion resistance performances of emeraldine base-coated aluminium samples in neutral environment
| Autor: | Laura Cecchetto, Jean-Pierre Petit, Alain Denoyelle, Didier Delabouglise |
|---|---|
| Přispěvatelé: | Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Scanning electron microscope Polyaniline General Physics and Astronomy chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion chemistry.chemical_compound Coating Aluminium Salt spray test Silane Phosphoric acid Corrosion protection Metallurgy Surfaces and Interfaces General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 0104 chemical sciences Surfaces Coatings and Films chemistry engineering Adhesion 0210 nano-technology Nuclear chemistry |
| Zdroj: | Applied Surface Science Applied Surface Science, Elsevier, 2008, 254 (6), pp. 1736-1743. ⟨10.1016/j.apsusc.2007.07.128⟩ |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2007.07.128⟩ |
| Popis: | International audience; An aluminium–magnesium alloy AA5182 substrate pre-treated with a 3-aminopropyl-triethoxysilane (APS)-based solution and coated with emeraldine base (EB) showed improved corrosion resistance to neutral salt spray test, compared to samples pre-treated with phosphoric acid-based solutions prior to the EB coating. Scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX) characterisations of samples pre-treated with APS showed the presence of an uneven silane coating on the aluminium surface according to the surface microstructure. The potentiodynamic study performed on the EB-coated samples showed a noticeable reduction of corrosion current of coupons pre-treated with APS, while no relevant difference in corrosion behaviour was observed between APS and phosphoric acid pre-treated samples prior to the EB coating. The coupling activity of APS between the AA5182 surface and EB coating at the most sensitive corrosion sites could be responsible of an improved adhesion of the EB coating at these points and could explain the observed improved corrosion resistance. |
| Databáze: | OpenAIRE |
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