Cut-edge corrosion study on painted aluminum rich metallic coated steel by scanning vibrating electrode and micro-potentiometric techniques
authors Alvarez-Pampliega, A; Lamaka, SV; Taryba, MG; Madani, M; De Strycker, J; Tourwe, E; Ferreira, MGS; Terryn, H
nationality International
journal ELECTROCHIMICA ACTA
author keywords Cut-edge corrosion; Painted Zn-Al metallic coated steel; SVET; SIET; PH; Micro-potentiometry
keywords GALVANIZED STEEL; CARBON-STEEL; ZINC; ALLOY; SVET; PRODUCTS; CHLORIDE; PH; INHIBITION; MECHANISM
abstract Aluminium-rich metallic coated steels were found to be especially sensitive to cut-edge corrosion in various climates for both painted and unpainted material. The aim of this work is to study the corrosion process in the cut-edge and the effect of aluminium presence in the metallic coating. In this frame, painted zinc metallic coated steel samples with different amount of AI were studied by scanning vibrating electrode technique coupled with a scanning ion-selective electrode technique (SVET/SIET). SVET and micro-potentiometric pH measurements were performed quasi simultaneously. The experiments were performed in continuous immersion in 0.05 M NaCl. As a result, differences in pH and activity for the studied systems could be linked to the presence of aluminium. Formed corrosion products were identified by Raman spectroscopy, FTIR spectroscopy, SEM-EDX and by analyzing the local pH in the area of precipitation. (C) 2011 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0013-4686
year published 2012
volume 61
beginning page 107
ending page 117
digital object identifier (doi) 10.1016/j.electacta.2011.11.110
web of science category Electrochemistry
subject category Electrochemistry
unique article identifier WOS:000301216900015
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