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Inhibition of Filiform Corrosion on Organic-Coated Magnesium-Containing Galvanized Steel by Smart-Release Ion Exchange Pigments

Emmanouela Michailidou, Hamilton McMurray, Geraint Williams Orcid Logo

ECS Transactions, Volume: 80, Issue: 10, Pages: 585 - 591

Swansea University Authors: Hamilton McMurray, Geraint Williams Orcid Logo

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DOI (Published version): 10.1149/08010.0585ecst

Abstract

This paper describes a systematic kinetic study on the inhibitory effect of anion exchange Hydrotalcite-based pigments on filiform corroding hot dipped Zn-(1-2 w%)Mg-(1-2 w%)Al galvanized steel. Filiform corrosion was initiated via scribing the organic-coated samples and introducing a corrosive elec...

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Published in: ECS Transactions
ISSN: 1938-6737 1938-5862
Published: 2017
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa40083
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Abstract: This paper describes a systematic kinetic study on the inhibitory effect of anion exchange Hydrotalcite-based pigments on filiform corroding hot dipped Zn-(1-2 w%)Mg-(1-2 w%)Al galvanized steel. Filiform corrosion was initiated via scribing the organic-coated samples and introducing a corrosive electrolyte in the defect. Following filiform corrosion initiation, the time-dependent extent of coating delamination was determined photographically over a period of six weeks. It is positively demonstrated that the addition of smart-release pigments in the organic coating greatly suppresses the rate of filiform corrosion. The inhibitor efficiency is shown to increase in the order: carbonate < benzotriazole < benzotriazolate. The release of carbonates leads to filiform corrosion increase.
College: Faculty of Science and Engineering
Issue: 10
Start Page: 585
End Page: 591