Volume 11, Issue 41 (11-2021)
مهندسی خوردگی 2021, 11(41): 57-68 |
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Smart Self-Healing Nanostructured
Multilayered Coatings Containing
Graphene Oxide and Inhibitor for
Corrosion Protection of 2024 Aluminum
Alloy. مهندسی خوردگی 2021; 11 (41) :57-68
URL: http://journal.ica.ir/article-1-164-en.html
URL: http://journal.ica.ir/article-1-164-en.html
Abstract: (453 Views)
In self-healing coatings, corrosion inhibitors should be properly incorporated into the coating so that smart release
of the inhibitor can occur in case of corrosion process. In this work, for the first time, multi-layered nanostructured
self-healing coatings including sol-gel/ PEI-PAA polyelectrolyte pair / benzotriazole corrosion inhibitor /
graphene oxide have been prepared to protect the surface of 2024 aluminum alloy. Local pH changes due to
corrosion trigger the smart release of corrosion inhibitors, thus protecting the substrate surface. The presence of
graphene oxide layer also prevents the penetration of water and corrosive agents to the substrate surface. SEM
and EDS tests were used to study the morphology, chemical composition and distribution of constituent elements.
The release of corrosion inhibitor in response to local pH changes was studied by UV-vis spectroscopy. FTIR and
RAMAN tests were used to ensure the formation of a graphene oxide layer. Self-healing ability and corrosion
protection of the coatings was studied by electrochemical impedance spectroscopy (EIS). The results showed that
the smart multilayered coatings have superior corrosion protection performance compared to hybrid sol-gel
monolayer
of the inhibitor can occur in case of corrosion process. In this work, for the first time, multi-layered nanostructured
self-healing coatings including sol-gel/ PEI-PAA polyelectrolyte pair / benzotriazole corrosion inhibitor /
graphene oxide have been prepared to protect the surface of 2024 aluminum alloy. Local pH changes due to
corrosion trigger the smart release of corrosion inhibitors, thus protecting the substrate surface. The presence of
graphene oxide layer also prevents the penetration of water and corrosive agents to the substrate surface. SEM
and EDS tests were used to study the morphology, chemical composition and distribution of constituent elements.
The release of corrosion inhibitor in response to local pH changes was studied by UV-vis spectroscopy. FTIR and
RAMAN tests were used to ensure the formation of a graphene oxide layer. Self-healing ability and corrosion
protection of the coatings was studied by electrochemical impedance spectroscopy (EIS). The results showed that
the smart multilayered coatings have superior corrosion protection performance compared to hybrid sol-gel
monolayer
Type of Study: Research |
Subject:
General
Received: 2023/01/28 | Accepted: 2023/01/30 | Published: 2023/01/30
Received: 2023/01/28 | Accepted: 2023/01/30 | Published: 2023/01/30
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