RT info:eu-repo/semantics/article
T1 Uses of scanning electrochemical microscopy (SECM) for the characterization with spatial and chemical resolution of thin surface layers and coating systems applied on metals: A review
A1 Souto, Ricardo Manuel
A1 Santana, Juan J.
A1 Izquierdo, Javier
A2 Química
A2 The work was supported by the University of La Laguna and the Spanish Ministry of ScienceInnovation and Universities (Madrid, Spain) under contract No. 2022/0000586.
Grupo de Electroquímica y Corrosión, Instituto de Materiales y Nanotecnología
AB Scanning Electrochemical Microscopy (SECM) is increasingly used in the study and characterization of thin surface films as well as organic and inorganic coatings applied on metals for thecollection of spatially- and chemically-resolved information on the localized reactions related to material degradation processes. The movement of a microelectrode (ME) in close proximity to the interface under study allows the application of various experimental procedures that can be classifiedinto amperometric and potentiometric operations depending on either sensing faradaic currents orconcentration distributions resulting from the corrosion process. Quantitative analysis can be performed using the ME signal, thus revealing different sample properties and/or the influence of theenvironment and experimental variables that can be observed on different length scales. In this way,identification of the earlier stages for localized corrosion initiation, the adsorption and formation ofinhibitor layers, monitoring of water and specific ions uptake by intact polymeric coatings appliedon metals for corrosion protection as well as lixiviation, and detection of coating swelling—whichconstitutes the earlier stages of blistering—have been successfully achieved. Unfortunately, despitethese successful applications of SECM for the characterization of surface layers and coating systemsapplied on metallic materials, we often find in the scientific literature insufficient or even inadequatedescription of experimental conditions related to the reliability and reproducibility of SECM datafor validation. This review focuses specifically on these features as a continuation of a previousreview describing the applications of SECM in this field.
YR 2022
FD 2022
LK http://riull.ull.es/xmlui/handle/915/27461
UL http://riull.ull.es/xmlui/handle/915/27461
LA en
NO Coatings, 22 (2022) 637, 36 pp. https://doi.org/10.3390/coatings1250637
DS Repositorio institucional de la Universidad de La Laguna
RD 26-abr-2024