RT info:eu-repo/semantics/article
T1 SECM study of the pH distribution on Cu samples treated with 2-Mercaptobenzothiazole in NaCl solution
A1 Souto, Ricardo Manuel
A1 Ramírez-Cano, J.A.
A1 Veleva, L.
A1 Fernández Pérez, Bibiana María
K1 SECM
K1 pH distribution
K1 Copper
K1 2-Mercaptobenzothiazole
K1 Atacamite
K1 Multilayer film
AB This paper reports the effect of treatment with 2-mercaptobenzothiazole (2MBT) (a corrosion inhibitor) on pH distribution over Cu samples monitored in situ using scanning electrochemical microscopy (SECM) in potentiometric mode. Line scans were conducted over two copper wires embedded in insulating resin, one of which had been pre-treated with 2MBT. It was found that the treated Cu sample had a less acidic character than the non-treated sample. Furthermore, the pH above the resin areas is considerably more acidic than that above either Cu wire. This feature is attributed to the consumption of OH- ions on the non-treated Cu wire during the formation of atacamite as a corrosion product, and the tautomeric equilibrium established by the detached 2-mercaptobenzothiazole molecules in the bulk electrolyte. These pH distributions are spatially resolved in the SECM mapping above both Cu wires.
YR 2017
FD 2017
LK http://riull.ull.es/xmlui/handle/915/19011
UL http://riull.ull.es/xmlui/handle/915/19011
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 24-abr-2024