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

Peter Visser*, H. Terryn, J. M.C. Mol

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    46 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)272-285
    JournalCorrosion Science
    Volume140
    DOIs
    Publication statusPublished - 2018

    Keywords

    • Active protection
    • Aluminium
    • Inhibitor
    • Lithium
    • Organic
    • Reversibility

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