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Cation effect in the corrosion inhibition properties of coumarate ionic liquids and acrylic uv-coatings

Udabe, Esther, Somers, Anthony, Forsyth, Maria and Mecerreyes, David 2020, Cation effect in the corrosion inhibition properties of coumarate ionic liquids and acrylic uv-coatings, Polymers, vol. 12, no. 11, pp. 1-16, doi: 10.3390/polym12112611.

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Title Cation effect in the corrosion inhibition properties of coumarate ionic liquids and acrylic uv-coatings
Author(s) Udabe, Esther
Somers, AnthonyORCID iD for Somers, Anthony orcid.org/0000-0002-0220-2904
Forsyth, MariaORCID iD for Forsyth, Maria orcid.org/0000-0002-4273-8105
Mecerreyes, David
Journal name Polymers
Volume number 12
Issue number 11
Article ID 2611
Start page 1
End page 16
Total pages 16
Publisher MDPI AG
Place of publication Basel, Switzerland
Publication date 2020-11
ISSN 2073-4360
2073-4360
Keyword(s) corrosion inhibitors
ionic liquids
poly(ionic liquid)s
Summary Chromate free corrosion inhibitors are searched for to mitigate the economic loss caused by mid-steel corrosion. Here, we show metal-free organic inhibitors having free coumarate anions that can be used either as direct corrosion inhibitors or incorporated into a polymer coating obtained by UV-curing. Four different ionic liquid monomers and polymer coatings with hexoxycoumarate anion and different polymerizable counter cations were investigated. Potentiodynamic polarization, electrochemical impedance spectroscopy, and surface analyses have verified their corrosion inhibition performance on a mild steel AS1020 surface. In the case of the coumarate ionic liquid monomers, the most promising inhibitor is the one coupled with the ammonium cation, showing an inhibition efficiency of 99.1% in solution followed by the imidazolium, pyridinium, and anilinium. Next, the ionic liquid monomers were covalently integrated into an acrylic polymer coating by UV-photopolymerization. In this case, the barrier effect of the polymer coating is combined with the corrosion inhibitor effect of the pendant coumarate anion. Here, the best polymer coatings are those containing 20% imidazolium and pyridinium cations, presenting a greater impedance in the EIS (Electrochemical Impedance Spectroscopy) measurements and less evidence of corrosion in the scribe tests. This article shows that the cationic moiety of coumarate based ionic liquids and poly(ionic liquid)s has a significant effect on their excellent corrosion inhibition properties for a mild steel surface exposed to aqueous chloride solutions.
Language eng
DOI 10.3390/polym12112611
Indigenous content off
Field of Research 091209 Polymers and Plastics
091205 Functional Materials
030604 Electrochemistry
03 Chemical Sciences
09 Engineering
Socio Economic Objective 870302 Metals (e.g. Composites
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grantagreement No 823989
Spanish MINECO for a FPU fellowship
Australian Research Council through a Discovery Project, DP180101465
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30145945

Document type: Journal Article
Collections: Institute for Frontier Materials
Open Access Collection
GTP Research
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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.