Improving the corrosion protection properties of PVB coating by using salicylaldehyde@ZIF-8/graphene oxide two-dimensional nanocomposites
Improving the corrosion protection properties of PVB coating by using salicylaldehyde@ZIF-8/graphene oxide two-dimensional nanocomposites
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DOI：
10.1016/j.corsci.2018.10.016
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发表时间：
2019
影响因子：
8.3
通讯作者：
Liangliang Xiong;Jianhua Liu;Mei Yu;Song-mei Li
中科院分区：
文献类型：
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作者：
Liangliang Xiong;Jianhua Liu;Mei Yu;Song-mei Li
将含有缓蚀剂水杨醛(SA)的ZIF-8纳米粒子锚定在GO纳米片上，制备了一种二维纳米复合材料@ZIF-8/GO(SZG)，用于AA2024铝合金的腐蚀防护。通过UV-Vis测试，证实了其在酸性和Al3+离子条件下对SA的刺激响应性释放。电化学阻抗谱表明，与对照样品相比，SZG纳米复合材料显著提高了PVB涂层的被动和主动防护性能。增强的被动保护源于SZG的二维结构，而抑制剂SA起到主动保护的作用。量子化学计算清楚地阐明了SA的释放和抑制机理。
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 Al3+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.