RT info:eu-repo/semantics/article
T1 Scanning electrochemical microscopy for the investigation of localized degradation processes in coated metals: Effect of oxygen
A1 Souto, Ricardo Manuel
A1 González, Sergio
A1 Santana, Juan José
A1 González-García, Yaiza
K1 A. Organic coatings
K1 A. Polyurethane
K1 A. Mild steel
K1 B. Scanning electrochemical microscopy
K1 C. Iron dissolution
K1 C. Oxygen reduction
AB 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
YR 2011
FD 2011
LK http://riull.ull.es/xmlui/handle/915/19136
UL http://riull.ull.es/xmlui/handle/915/19136
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 22-nov-2024