On the importance of irreversibility of corrosion inhibitors for active coating protection of AA2024-T3

On the importance of irreversibility of corrosion inhibitors for active coating protection of AA2024-T3

Visser, P. (TU Delft (OLD) MSE-6; Akzo Nobel)
Terryn, H.A. (TU Delft (OLD) MSE-1; Vrije Universiteit Brussel)
Mol, J.M.C. (TU Delft (OLD) MSE-6)

2018

Inhibitor leaching, fast, effective and irreversible passivation are essential for active protective coatings to protect aluminium alloys. This study presents the comparison of the active protective properties of lithium carbonate and two organic corrosion inhibitors, benzotriazole and 2-mercaptobenzothiazole, on aluminium alloy 2024-T3 with a special focus on the irreversibility of the inhibition. A combined approach of electrochemical measurements, optical observations, surface roughness and weight-loss measurements revealed the reversible inhibition behaviour of benzotriazole and 2-mercaptobenzothiazole on AA2024-T3. On the contrary, lithium carbonate demonstrated fast, effective and irreversible corrosion inhibition, providing the essential characteristics needed for effective active corrosion protection from coatings.

Active protection
Aluminium
Inhibitor
Lithium
Organic
Reversibility

http://resolver.tudelft.nl/uuid:6e96b106-6790-4b37-a988-7bbeaae2f04c

https://doi.org/10.1016/j.corsci.2018.05.037

2018-11-30

0010-938X

Corrosion Science: the journal on environmental degradation of materials and its control, 140, 272-285

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2018 P. Visser, H.A. Terryn, J.M.C. Mol