Coatings embedded with GO/MOFs nanocontainers having both active and passive protecting properties

• Published in: Corrosion science Vol. 168; p. 108563
• Main Authors: Zhao, Yue, Jiang, Fan, Chen, Yi-Qing, Hu, Ji-Ming
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Ltd 15.05.2020; Elsevier BV
• Subjects: Active protection; Benzotriazole; Coatings; Corrosion inhibitors; Corrosion prevention; Graphene; Graphene oxide; Metal organic frameworks; Nanocontainers; Passive protection; Polyvinyl acetal resins; Polyvinyl butyral; Active protection; Nanocontainers; Graphene oxide; Metal organic frameworks; Passive protection
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2020.108563

[Display omitted] •The GO/MOFs nanocomposites can be used as applicable nanocontainers.•Inhibitor-encapsulated GO/MOFs nanocontainers exhibit both passive and active protecting properties.•The method of preparing GO/MOFs nanocontainers is facile and versatile by just one-pot reaction. In this work, metal organic frameworks (MOFs) are in situ growing on the graphene oxide (GO) sheets to fabricate GO/MOFs nanocontainers for both active and passive corrosion protection. ZIF-8 and UiO-66 are chosen as two classic examples to synthesize GO/MOFs nanocontainers encapsulating benzotriazole (BTA) embedded in polyvinyl butyral (PVB) resin. The composite coatings are successfully utilized in protecting pure copper and archaized bronze, exhibiting both active and passive protecting properties. The passive protection capability is ensured by good barrier performance of GO, and the active prevention property is provided by the pH-stimulated release of embedded inhibitors from the composite nanocontainers.