RT info:eu-repo/semantics/article T1 Self-healing processes in coil coated cladding studied by the scanning vibrating electrode A1 Souto, Ricardo Manuel A1 Normand, B. A1 Takenouti, H. A1 Keddam, M. K1 Defective organic coating K1 Self-healing effect K1 Local current density K1 Scanning vibrating electrode technique K1 Coil-coated steel AB The ability of the zinc layer in coil-coated cladding to protect the underlying metal substrate exposed to the environment through a sub-centimetre circular defect was established by using the scanning vibrating electrode technique (SVET). The onset of electrochemical corrosion is observed through the development of local anodes and cathodes in the defective system, with the formation of soluble zinc species. The dissolution process is maintained until a sufficiently high concentration is attained by the metal ions, and their subsequent precipitation inside the holiday blocks the defect as to hinder further corrosion. A self healing effect was thus observed. The role of zinc salts was confirmed by SEM and EDX observations YR 2010 FD 2010 LK http://riull.ull.es/xmlui/handle/915/19117 UL http://riull.ull.es/xmlui/handle/915/19117 LA en DS Repositorio institucional de la Universidad de La Laguna RD 13-nov-2024