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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 Orcid Logo, Hamilton McMurray, Louis Gommans, Scott Morrison, Sonny Ngo, David E. Williams, Wei Gao

Corrosion Science, Volume: 192

Swansea University Authors: Geraint Williams Orcid Logo, Hamilton McMurray

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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
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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: College of 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