Anti-corrosion properties of a silane–zeolite composite coating applied to aluminium substrates have been investigated. The composite film was prepared with different silane matrix formulations (varying bi-functional and tri-functional silane ratios). The results showed high hydrophobicity of the modified silane–zeolite coatings. Corrosion protection performance, during immersion in 3.5% NaCl solution, was evaluated by means of polarisation and electrochemical impedance spectroscopy tests. The polarisation curves evidenced a good corrosion resistance of all composite coating; though at high content of bi-functional silane, a reduction of corrosion protection performance was observed. At long immersion time (until 150 days), only the composite coating with low amount of bi-functional silane still evidenced good barrier properties.

Enhancement of the hydrophobic and anti- corrosion properties of a composite zeolite coating on Al6061 substrate by modification of silane matrix / L., Calabrese; Bonaccorsi, Lucio Maria; A., Caprì; E., Proverbio. - In: CORROSION ENGINEERING, SCIENCE AND TECHNOLOGY. - ISSN 1743-2782. - 52:1(2017), pp. 61-72. [10.1080/1478422X.2016.1209354]

Enhancement of the hydrophobic and anti- corrosion properties of a composite zeolite coating on Al6061 substrate by modification of silane matrix

BONACCORSI, Lucio Maria;
2017-01-01

Abstract

Anti-corrosion properties of a silane–zeolite composite coating applied to aluminium substrates have been investigated. The composite film was prepared with different silane matrix formulations (varying bi-functional and tri-functional silane ratios). The results showed high hydrophobicity of the modified silane–zeolite coatings. Corrosion protection performance, during immersion in 3.5% NaCl solution, was evaluated by means of polarisation and electrochemical impedance spectroscopy tests. The polarisation curves evidenced a good corrosion resistance of all composite coating; though at high content of bi-functional silane, a reduction of corrosion protection performance was observed. At long immersion time (until 150 days), only the composite coating with low amount of bi-functional silane still evidenced good barrier properties.
2017
Aluminium,; Silane coating; Zeolite
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12318/1313
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