A Molecular Approach for Mitigation of Aluminum Pitting based on Films of Zinc(II) and Gallium(III) Metallosurfactants
A Molecular Approach for Mitigation of Aluminum Pitting based on Films of Zinc(II) and Gallium(III) Metallosurfactants
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基于锌 (II) 和镓 (III) 金属表面活性剂薄膜的减轻铝点蚀的分子方法
DOI：
10.1002/chem.201903408
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Verani, Cláudio N.
中科院分区：
文献类型：
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作者：
Weeraratne, A. D. K. Isuri;Hewa‐Rahinduwage, Chathuranga C.;Gonawala, Sunalee;Luo, Long;Verani, Cláudio N.
基于金属表面活性剂[Zn Ⅱ（LN_2 O_2）H_2 O]（1）和[Ga Ⅲ（LN_2 O_3）]（2）的行为，讨论了金属表面活性剂在防止铝表面点蚀中的应用。这些物种被沉积为多层Langmuir-Blodgett膜，并通过红外反射吸收光谱和UV/维斯光谱进行表征。扫描电子显微镜图像，动电位极化实验，和电化学阻抗谱被用来评估腐蚀缓解。两种金属表面活性剂均表现出上级抗腐蚀活性，这是由于氧化还原惰性3d 10金属离子的存在，这些金属离子增强了有序分子膜的结构电阻，并限制了氯离子的迁移率和电子转移。
The use of metallosurfactants to prevent pitting corrosion of aluminum surfaces is discussed based on the behavior of the metallosurfactants [ZnII(LN2O2)H2O] (1) and [GaIII(LN2O3)] (2). These species were deposited as multilayer Langmuir–Blodgett films and characterized by IR reflection absorption spectroscopy and UV/Vis spectroscopy. Scanning electron microscopy images, potentiodynamic polarization experiments, and electrochemical impedance spectroscopy were used to assess corrosion mitigation. Both metallosurfactants demonstrate superior anticorrosion activity due to the presence of redox‐inactive 3d10metal ions that enhance the structural resistance of the ordered molecular films and limit chloride mobility and electron transfer.