Emeraldine base as corrosion protective layer on aluminium alloy AA5182, effect of the surface microstructure
| Autor: | Rajan Ambat, Jean-Pierre Petit, Alison J. Davenport, Didier Delabouglise, Laura Cecchetto, O. Neel |
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| 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), School of Metallurgy and Materials, University of Birmingham [Birmingham] |
| Rok vydání: | 2007 |
| Předmět: |
6111 aluminium alloy
Materials science Passivation Polyaniline General Chemical Engineering chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Corrosion Cathodic protection Coating Aluminium Pitting corrosion Aluminium alloy General Materials Science Metallurgy [CHIM.MATE]Chemical Sciences/Material chemistry General Chemistry 021001 nanoscience & nanotechnology Emeraldine base 0104 chemical sciences chemistry visual_art visual_art.visual_art_medium engineering 0210 nano-technology |
| Zdroj: | Corrosion Science Corrosion Science, Elsevier, 2007, 49 (2), pp. 818-829. ⟨10.1016/j.corsci.2006.06.012⟩ |
| ISSN: | 0010-938X |
| DOI: | 10.1016/j.corsci.2006.06.012 |
| Popis: | International audience; AA5182 aluminium alloy cold rolled samples were coated by thin films of emeraldine base (EB) obtained from a 5% solution in N-methylpyrrolidinone. Accelerated corrosion tests prove this coating very effective for corrosion protection of aluminium alloys in neutral environment. This study underlines the prominent role of surface cathodic intermetallic particles in pit initiation and coating break down in enhanced corrosion conditions and suggest that, beside the EB barrier properties, the enhanced corrosion resistance observed on the EB coated samples could partly arise from two other mains factors:• a weak redox activity of the polymer which passivate the metal,• a proton involving self-healing process taking place at the polymer–metal interface, which contributes to delay local acidification in first steps of corrosion on EB coated aluminium surfaces. |
| Databáze: | OpenAIRE |
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