RT info:eu-repo/semantics/article
T1 Imaging local surface reactivity on stainless steels 304 and 316 in acid chloride solution using scanning electrochemical microscopy and the scanning vibrating electrode technique
A1 Souto, Ricardo Manuel
A1 Izquierdo Pérez, Javier
A1 Martín-Ruíz, L.
A1 Fernández Pérez, Bibiana María
A1 Fernández-Mérida, Luis
A1 Santana, Juan José
K1 304 & 316 stainless steels
K1 Pitting corrosion
K1 Scanning electrochemical microscopy
K1 Scanning vibrating electrode technique
K1 Chloride ions
AB Passive film breakdown and pit nucleation on 304 and 316 stainless steels in chloride-containing media were investigated using scanning microelectrochemical microscopy (SECM) and the scanning vibrating electrode technique (SVET). Experiments were performed for the alloys either at their corresponding open circuit potential, or under applied polarization, as to image domains of similar topography but different resistance against breakdown of the passive layers formed on these steels. Identification of the iron released species was accomplished, showing that pitting occurs with the formation of iron (II) species only. Detection of iron (III) species occurred when the steel sample was polarized at high positive overpotentials because it served as the reaction site to oxidize the iron (II) ions released from a propagating pit. The obtained results have revealed some difference of the reactivity of both specimens. Moreover the effect of the galvanic coupling has been investigated
YR 2014
FD 2014
LK http://riull.ull.es/xmlui/handle/915/19098
UL http://riull.ull.es/xmlui/handle/915/19098
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 18-nov-2024