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Cut-edge corrosion behavior assessment of newly developed environmental-friendly coating systems using the Scanning Vibrating Electrode Technique (SVET)

Sina Sheikholeslami, Geraint Williams, Hamilton McMurray, Louis Gommans, Scott Morrison, Sonny Ngo, David E. Williams, Wei Gao

Corrosion Science, Volume: 192

Swansea University Authors: Geraint Williams, Hamilton McMurray

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DOI (Published version): 10.1016/j.corsci.2021.109813

Abstract

Accelerated cut-edge corrosion performance of commercialized full waterborne coating systems containing enviro-friendly corrosion inhibitors was studied on 55 wt% Al, 44 wt% Zn and 1 wt% Si galvanized steel in 5 wt% NaCl solution at ambient temperature via the Scanning Vibrating Electrode Technique...

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Published in: Corrosion Science
ISSN: 0010-938X
Published: Elsevier BV 2021
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa57874
Abstract: Accelerated cut-edge corrosion performance of commercialized full waterborne coating systems containing enviro-friendly corrosion inhibitors was studied on 55 wt% Al, 44 wt% Zn and 1 wt% Si galvanized steel in 5 wt% NaCl solution at ambient temperature via the Scanning Vibrating Electrode Technique (SVET). At the same volume content (7–11 wt%), benzotriazole pigments had a better overall cut-edge corrosion performance than calcium ion exchanged silica pigments. It was due to benzotriazole’s superior cathodic protection of the cut-edge in comparison with calcium silicate. Furthermore, although both enviro-friendly inhibitors did not exhibit the same performance level as the conventional Cr(VI)-containing system, they exhibited promising results in inhibiting cut-edge corrosion in a fully commercialized waterborne coating system.
Keywords: Galvanized steel; Cut-edge; Corrosion; SVET; Benzotriazole; Calcium silica; Waterborne; Environmental-friendly; Coil coating
College: Faculty of Science and Engineering
Funders: Fletcher Steel, Callaghan Innovation (a New Zealand Government Organization) and Uniservices Grant: FBLD1701-PROP-55111-FELLOW-FLETCHBUILD Fletcher Steel Ltd (New Zealand) Becker's Group (United Kingdom and Malaysia

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