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Título: | Electrochemical study of tailored sol-gel thin films as pre-treatment prior to organic coating for AZ91 magnesium alloy |
Autor: | Barranco, Violeta CSIC ORCID ; Carmona, N. CSIC ORCID; Galván Sierra, Juan Carlos CSIC ORCID ; Grobelny, M.; Kwiatkowski, L.; Villegas Broncano, María Ángeles CSIC ORCID | Palabras clave: | Local electrochemical impedance spectroscopy (LEIS) Electrochemical impedance spectroscopy (EIS) Corrosion inhibitors Cerium-doped coatings Hybrid coatings Sol–gel coatings |
Fecha de publicación: | 2010 | Editor: | Elsevier | Citación: | Progress in Organic Coatings 68: 347-355 (2010) | Resumen: | The behaviour/resistance of four optimised sol-gel coating systems (inorganic, hybrid organic-inorganic, containing zirconium ions and containing cerium ions) against corrosion of AZ91 magnesium alloy were studied. The coatings obtained by the sol-gel process were evaluated as autonomous protective coatings as well as a pre-treatment prior to acrylic top coat. The coating obtained from tetramethoxysilane (TMOS) and diethoxydimethylsilane (DEDMS) as precursors and doped with Ce3+ was especially effective as pre-treatment for a final acrylic coating. For non-defected coating the impedance modulus has not changed during the time of immersion (7 days) in 0.5 M Na2SO4. An inhibition of coating delamination at the defect of the acrylic coating was recorded by means of LEIS. © 2010 Elsevier B.V. All rights reserved. | URI: | http://hdl.handle.net/10261/114611 | DOI: | 10.1016/j.porgcoat.2010.02.009 | Identificadores: | doi: 10.1016/j.porgcoat.2010.02.009 issn: 0300-9440 |
Aparece en las colecciones: | (CENIM) Artículos |
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