Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/44576
Título: Scanning electrochemical microscopy for the investigation of localized degradation processes in coated metals: Effect of oxygen
Autores/as: González, Sergio
Santana, Juan J. 
González-García, Yaiza
Fernández-Mérida, Luis
Souto, Ricardo M.
Clasificación UNESCO: 3303 ingeniería y tecnología químicas
Palabras clave: Organic coatings
Steel
Scanning electrochemical microscopy
Anodic dissolution
Oxygen reduction
Fecha de publicación: 2011
Editor/a: 0010-938X
Publicación seriada: Corrosion science 
Resumen: The effect of oxygen content on the corrosion reactions inside a holiday in a polymer-coated metal substrate was studied by SECM without adding a redox mediator. The system was mild steel coated by polyurethane in KCl. By selecting different values for the potential applied to the ultramicroelectrode tip, local concentrations of species involved in the degradation process are monitored, namely Fe(II) ions, hydrogen peroxide and oxygen. The results show a variation in both the shape and the magnitude of the scan lines measured over the holiday. A critical oxygen concentration was found below which the corrosion reaction is not observed.
URI: http://hdl.handle.net/10553/44576
ISSN: 0010-938X
DOI: 10.1016/j.corsci.2011.02.008
Fuente: Corrosion Science[ISSN 0010-938X],v. 53, p. 1910-1915
Colección:Artículos
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