Microcontainers with 3-amino-1,2,4-triazole-5-thiol for Enhancing Anticorrosion Waterborne Coatings for AA2024-T3

•ATAT in smart microcontainers was used to develop anticorrosion coatings for AA20204-T3.•The release of ATAT from microcontainers protected the oxide layer of the substrate.•Direct addition of ATAT in the epoxy coating formula causes the loss of inhibition of ATAT. Using organic coatings with high...

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Bibliographic Details
Published in:Progress in organic coatings 2019-12, Vol.137, p.105336, Article 105336
Main Authors: Soleymanibrojeni, Mohammad, Shi, Hongwei, Udoh, Inime Ime, Liu, Fuchun, Han, En-Hou
Format: Article
Language:English
Subjects:
Active corrosion protection
Aluminum base alloys
Corrosion
Corrosion inhibitors
Corrosion prevention
Corrosion resistance
Corrosion resistant alloys
EIS
Maintenance management
Organic coatings
Organic inhibitor
Penetration resistance
Performance enhancement
Polyelectrolyte deposition
Protective coatings
Substrates
SVET
Triazoles
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Summary:•ATAT in smart microcontainers was used to develop anticorrosion coatings for AA20204-T3.•The release of ATAT from microcontainers protected the oxide layer of the substrate.•Direct addition of ATAT in the epoxy coating formula causes the loss of inhibition of ATAT. Using organic coatings with high barrier property in combination with active corrosion protection can improve corrosion protection of aluminum alloys. In this work, 3-Amino-1,2,4-triazole-5-thiol (ATAT) was used as organic inhibitor in developing anticorrosion coatings for AA2024-T3. The delivery of ATAT was achieved by using smart microcontainers with ATAT that respond to pH change caused by corrosion reaction at the coating-substrate interface. The developed coatings with low concentration of smart microcontainers showed a slight reduction of barrier properties, but gained active corrosion protection capability. The resistance of the coatings reduced the rate of penetration of corrosive species and the active corrosion protection stopped the damaging reactions at the coating-substrate interface. The active corrosion protection is also evident in the case of coatings with mechanical damages, when the barrier property of coatings is compromised. Waterborne coatings with smart microcontainers for delivery of ATAT exhibited enhanced performance for corrosion protection of AA2024-T3.
ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2019.105336