Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/45825
Title: Effect of mineral pigments on the water uptake in organic films
Authors: Popa, M. V.
Drob, P.
Vasilescu, E.
Vasilescu, C.
Drob, S. I.
Mirza Rosea, J. C. 
UNESCO Clasification: 3313 Tecnología e ingeniería mecánicas
3315 Tecnología metalúrgica
Keywords: Electric equivalent circuit
Organic films
Mineral pigments
Electrochemical techniques
Issue Date: 2008
Journal: 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society
Conference: 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society 
Abstract: The paper presents the results of the electrochemical study (electrochemical impedance spectroscopy and anodic polarization) regarding the water uptake in alkyd films with various mineral pigments (white titanium dioxide, yellow iron oxide, and iron blue). The films were realized on carbon steel substrate; dry film thickness in the range 20- 25 urn for the film without pigments and 30 -35 urn for the films with pigments were obtained. The measurements were carried out in 5% NaCI solution at 25°C temperature during a 1500 immersion hours period. The interpretation of the impedance spectra established the presence of two time constants: one for the paint film and another for the reactions at the organic film/carbon steel interface. The evaluation of the time trends of the electrical film capacitance was permitted to determine the water permeability of the studied films. The volume fraction of uptaken water in the films was calculated and the absorption diagram was established. This experimental data were correlated with electrochemical parameters determined from anodic polarization curves. It resulted that white titanium dioxide and iron blue pigments present a beneficial effect and decrease very much the water permeability of the alkyd paint film
URI: http://hdl.handle.net/10553/45825
ISBN: 9781615674251
Source: 17th International Corrosion Congress 2008: Corrosion Control in the Service of Society,v. 2, p. 858-866
Appears in Collections:Actas de congresos
Show full item record

Page view(s)

9
checked on Apr 17, 2021

Google ScholarTM

Check

Altmetric


Share



Export metadata



Items in accedaCRIS are protected by copyright, with all rights reserved, unless otherwise indicated.