Improving the corrosion protection properties of PVB coating by using salicylaldehyde@ZIF-8/graphene oxide two-dimensional nanocomposites. (January 2019)

• Record Type: Journal Article
• Authors: Xiong, Liangliang; Liu, Jianhua; Yu, Mei; Li, Songmei
• Is Part Of: Corrosion science. Volume 146(2019)
• Page Start: 70
• Page End: 79
• Publication Date: 2019-01
• Subjects: A. Two-dimensional structure -- A. Inhibitor -- B. Quantum chemical calculation -- C. Controlled release -- C. Corrosion protection property; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2018.10.016
• Languages: English
• ISSNs: 0010-938X

Abstract

Graphical abstract: Highlights: Salicylaldehyde@ZIF-8/GO (SZG) two-dimensional nanocomposites were synthesized for corrosion protection of aluminum alloy. Salicylaldehyde in SZG nanocomposites was released under the stimulation of Al 3+ cations. SZG nanocomposites improved the protection properties of PVB coating by enhanced passive and active protection. Quantum chemical calculation clarified the release and inhibition mechanisms of salicylaldehyde. Abstract: A two-dimensional nanocomposite, salicylaldehyde@ZIF-8/GO (SZG), was synthesized by anchoring the ZIF-8 nanoparticles containing the inhibitor salicylaldehyde (SA) on GO nanosheets for corrosion protection of AA2024 aluminum alloy. Its stimuli-responsive release of SA under acid and Al 3+ cations conditions was proved by UV–vis. Electrochemical impedance spectroscopy demonstrated that SZG nanocomposites prominently improved the protection properties of PVB coating by enhanced passive and active protection compared with the controlled samples. The enhanced passive protection derived from the two-dimensional structure of SZG, while inhibitor SA acted the active protection. Quantum chemical calculation clearly clarified the release and inhibition mechanisms of SA.