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Journal of Coatings Technology and Research
Published in: Journal of Coatings Technology and Research 3/2017

27-02-2017

Inhibitors for prolonging corrosion protection of Mg-rich primer on Al alloy 2024-T3

Authors: Junren Lin, Dante Battocchi, Gordon P. Bierwagen

Published in: Journal of Coatings Technology and Research | Issue 3/2017

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Abstract

This research investigated the possibility of adding inhibitors into magnesium-rich primer (MgRP) to prolong the corrosion protection time of MgRP on Al alloy 2024-T3. Three inhibitors: sodium benzoate (SB), sodium dodecylbenzenesulfonate (SDBS), and 8-hydroxyquinoline (HQ), were tested and added into MgRPs separately. Potentiodynamic scans on pellet electrodes confirmed that the inhibitors reduced Mg corrosion rate. The coating systems with and without inhibitors were compared through electrochemical tests, hydrogen volume measurement, accelerated weathering tests, and adhesion tests. It was observed that the addition of SB, SDBS, and HQ into MgRPs could prolong cathodic protection time and improved barrier properties of MgRPs, without compromising adhesion strength.
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Appendix
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Metadata
Title
Inhibitors for prolonging corrosion protection of Mg-rich primer on Al alloy 2024-T3
Authors
Junren Lin
Dante Battocchi
Gordon P. Bierwagen
Publication date
27-02-2017
Publisher
Springer US
Published in
Journal of Coatings Technology and Research / Issue 3/2017
Print ISSN: 1547-0091
Electronic ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-016-9875-4

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