A forming limit curve for the corrosion resistance of coil-coatings based on electrochemical measurements
authors Bastos, AC; Grundmeier, G; Simoes, AMP
nationality International
journal PROGRESS IN ORGANIC COATINGS
author keywords Coil-coatings; Corrosion; EIS; PLC; Forming limit curve
keywords IMPEDANCE SPECTROSCOPY; ORGANIC COATINGS; COATED METALS; PROTECTION; FORMABILITY; PREDICTION; STRAIN
abstract Forming limit curves (FLCs) are useful tools to predict the safe forming limits of metal sheet. However, existing FLCs are limited to bare metal and the increasing use of pre-painted metal sheet (coil-coatings) requires new limits that take into account the corrosion resistance. In this work electrochemical impedance spectroscopy (EIS) was used to characterise the degradation of a coil-coated system in different states of deformation (uniaxial, biaxial and plane strain). The EIS data provided information about the condition of both paint and metal substrate and was used to devise criteria for minimum acceptable protection. A FLC was produced based on those criteria and its predictions were compared with the degradation of a model deep-drawn cup. (C) 2014 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0300-9440
year published 2015
volume 80
beginning page 156
ending page 163
digital object identifier (doi) 10.1016/j.porgcoat.2014.11.020
web of science category Chemistry, Applied; Materials Science, Coatings & Films
subject category Chemistry; Materials Science
unique article identifier WOS:000349511900018
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journal analysis (jcr 2017):
journal impact factor 2.955
5 year journal impact factor 3.004
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