Localised Measurements of pH and Dissolved Oxygen as Complements to SVET in the Investigation of Corrosion at Defects in Coated Aluminum Alloy

resumo

This paper presents measurements of local pH and local oxygen reduction current performed to complement SVET (Scanning, Vibrating, Electrode Technique) in the characterization of the chemical environment near artificial defects on coated 2024-T3 aluminum alloy during corrosion and inhibition. The main purpose is to give examples on how micropotentiometry and microamperometry can add supplementary information to SVET, providing important insights for the understanding of corrosion mechanisms and inhibition processes necessary to develop effective self-healing coatings.

palavras-chave

SCANNING ELECTROCHEMICAL MICROSCOPY; GALVANIC CORROSION; SPATIAL-DISTRIBUTION; PRECURSOR SITES; ZN/STEEL COUPLE; INHIBITION; CURRENTS; SENSOR; CERIUM

categoria

Chemistry; Electrochemistry

autores

Bastos, AC; Karavai, OV; Zheludkevich, ML; Yasakau, KA; Ferreira, MGS

nossos autores

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