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The effect of composition and thickness on the mechanism and kinetics of filiform corrosion occurring on zinc-aluminium-magnesium coated steel / Natalie Wint; David Eaves; Geraint Williams; Hamilton McMurray

Corrosion Science, Volume: 179, Start page: 109168

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

  • Accepted Manuscript under embargo until: 26th November 2021

Abstract

The effect of coating thickness and composition on the kinetics of acetic acid-induced filiform corrosion (FFC) on Zinc-Aluminium-Magnesium (ZAM) coated steel is investigated. Scribe defects are created in organic coatings applied to ∼10 μm coatings of varying composition (1−6 wt.%. Al, 1−3 wt. % Mg...

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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/cronfa55842
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Abstract: The effect of coating thickness and composition on the kinetics of acetic acid-induced filiform corrosion (FFC) on Zinc-Aluminium-Magnesium (ZAM) coated steel is investigated. Scribe defects are created in organic coatings applied to ∼10 μm coatings of varying composition (1−6 wt.%. Al, 1−3 wt. % Mg), and fixed composition (Zn-1.5 wt. % Al- 1.5 wt.% Mg) but varying thickness (5−27 μm). FCC decreases with increasing Al (at fixed wt. % Mg) and thickness. A linear trend exists between thickness and iron exposure time. Findings are consistent with FFC advancing via a penetrative coating mechanism whereby exposed iron couples to the coating.
Keywords: A Steel, A Magnesium, A Metal coatings, C atmospheric corrosion, C polymer coatings
College: College of Engineering
Start Page: 109168