Journal
PROGRESS IN ORGANIC COATINGS
Volume 89, Issue -, Pages 57-66Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2015.07.026
Keywords
Corrosion; Collagen; Sol gel; FTIR; AA2024; EIS
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Collagen is a potential corrosion inhibitor for aluminium alloy 2024 (AA2024), being derived from fish scale, as confirmed by FTIR analysis. The extracted collagen powder was dissolved within a hybrid silica sot gel to produce an environmental friendly (green) coating. The corrosion behaviour of the silica sol gel (SOL) and collagen/silica sol gel.(CSOL) coated AA2024 in 3.5% NaCI solution was investigated by electrochemical impedance spectroscopy (EIS). In addition, the mechanical properties of both coatings were evaluated using hardness, micro-hardness resistance and a cross cut adhesion test. Results showed that collagen improves the corrosion resistance of the coated AA2024, while maintaining the mechanical properties of the non-doped silica sol gel coating. (C) 2015 Elsevier B.V. All rights reserved.
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