Cerium cinnamate as an environmentally benign inhibitor pigment for epoxy coatings on AA 2024-T3
authors Shi, HW; Han, EH; Lamaka, SV; Zheludkevich, ML; Liu, FC; Ferreira, MGS
nationality International
journal PROGRESS IN ORGANIC COATINGS
author keywords AA 2024-T3; Organic coatings; XPS; EIS; Corrosion
keywords ACTIVE CORROSION PROTECTION; OXIDE CONVERSION COATINGS; ALUMINUM-ALLOY CORROSION; SOL-GEL COATINGS; CHROMATE; AA2024; STEEL; SPECTROSCOPY; PASSIVATION; MECHANISMS
abstract An environmentally friendly inhibitor, cerium cinnamate (CeCin), was studied as an additive to an epoxy coating. The effects of corrosion inhibition on AA 2024-T3 provided by cerium cation and cinnamate anion were investigated by electrochemistry impedance spectra (EIS) and polarization tests. It was found that cerium ion and cinnamate group have synergistic inhibiting effects. The EIS results show that CeCin is an effective inhibitor pigment for improving the corrosion resistance of epoxy coatings on AA2024-T3, as reflected by the much higher coating resistance than that of the blank epoxy coating. The inhibiting effect of CeCin during the onset of corrosion in defects of the epoxy coating was verified using scanning vibrating electrode technique (SVET), which is in agreement with the EIS results. (C) 2014 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0300-9440
year published 2014
volume 77
issue 4
beginning page 765
ending page 773
digital object identifier (doi) 10.1016/j.porgcoat.2014.01.003
web of science category Chemistry, Applied; Materials Science, Coatings & Films
subject category Chemistry; Materials Science
unique article identifier WOS:000333794500003
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