No Cover Image

Journal article 25 views

The use of anion exchange pigments to inhibit the filiform corrosion of zinc-aluminium-magnesium coated steel / Natalie Wint, D. Eaves, Geraint Williams, Hamilton McMurray

Corrosion Science, Volume: 193, Start page: 109886

Swansea University Authors: Natalie Wint, Geraint Williams, Hamilton McMurray

  • Accepted Manuscript under embargo until: 14th October 2022

Abstract

In-coating natural (carbonate exchanged) hydrotalcite is shown to significantly reduce the extent of filiform corrosion (FFC) on Zinc-Aluminium-Magnesium (ZAM) coated steels. The hydrotalcite pigment is dispersed within the model poly vinyl butyral (PVB) coating, which is then applied to ZAM. Acetic...

Full description

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

URI: https://cronfa.swan.ac.uk/Record/cronfa58367
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: In-coating natural (carbonate exchanged) hydrotalcite is shown to significantly reduce the extent of filiform corrosion (FFC) on Zinc-Aluminium-Magnesium (ZAM) coated steels. The hydrotalcite pigment is dispersed within the model poly vinyl butyral (PVB) coating, which is then applied to ZAM. Acetic acid is applied to an artificial scribe penetrative PVB coating defect to initiate corrosion. Filiform corroded area and filament length are shown to decrease with increase in pigment volume fraction (ϕ). Tapering of filaments is also observed. Findings are consistent with hydrotalcite acting to sequester anions or neutralise the filiform head electrolyte.
Keywords: A Steel, A Magnesium, A Metal Coatings, A Organic Coatings, C Atmospheric Corrosion, C Polymer Coatings
College: College of Engineering
Start Page: 109886