Cerium cinnamate as an environmentally benign inhibitor pigment for epoxy coatings on AA 2024-T3

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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.

keywords

ACTIVE CORROSION PROTECTION; OXIDE CONVERSION COATINGS; ALUMINUM-ALLOY CORROSION; SOL-GEL COATINGS; CHROMATE; AA2024; STEEL; SPECTROSCOPY; PASSIVATION; MECHANISMS

subject category

Chemistry; Materials Science

authors

Shi, HW; Han, EH; Lamaka, SV; Zheludkevich, ML; Liu, FC; Ferreira, MGS

our authors

foto Mário Guerreiro Silva Ferreira

Mário Guerreiro Silva Ferreira

Retired Professor
foto Mikhail Zheludkevich

Mikhail Zheludkevich

Invited Principal Researcher

Groups

G3 - Electrochemical Materials, Interfaces and Coatings

acknowledgements

The authors acknowledge the financial support from the National Natural Science Fund of China (Grant No. 51001109) and FP7-PEOPLE-2010-IRSES project SISET:

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Publication Details

type
Journal Article
year
2014
journal
PROGRESS IN ORGANIC COATINGS
volume
77
publisher
ELSEVIER SCIENCE SA
issn
0300-9440
issue
4
digital object identifier
10.1016/j.porgcoat.2014.01.003
web of science article identifier
WOS:000333794500003

Journal Metrics (JCR 2019)

Journal Impact Factor
4.469
Journal Impact Factor (5 yrs)
4.061
category normalized journal percentile
86.922

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