AA2024上十钒酸盐插层层状双氢氧化物薄膜的原位形成及其与混合溶胶凝胶薄膜结合时的防腐性能。
In Situ Formation of Decavanadate-Intercalated Layered Double Hydroxide Films on AA2024 and their Anti-Corrosive Properties when Combined with Hybrid Sol Gel Films.
作者信息
Wu Junsheng, Peng Dongdong, He Yuntao, Du Xiaoqiong, Zhang Zhan, Zhang Bowei, Li Xiaogang, Huang Yizhong
机构信息
Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China.
School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore.
出版信息
Materials (Basel). 2017 Apr 18;10(4):426. doi: 10.3390/ma10040426.
A layered double hydroxide (LDH) film was formed in situ on aluminum alloy 2024 through a urea hydrolysis method, and a decavanadate-intercalated LDH (LDH-V) film fabricated through the dip coating method. The microstructural and morphological characteristics were investigated by scanning electron microscopy (SEM). The corrosion-resistant performance was analyzed by electrochemical impedance spectroscopy (EIS), scanning electrochemical microscopy (SECM), and a salt-spray test (SST).The SEM results showed that a complete and defect-free surface was formed on the LDH-VS film. The anticorrosion results revealed that the LDH-VS film had better corrosion-resistant properties than the LDH-S film, especially long-term corrosion resistance. The mechanism of corrosion protection was proposed to consist of the self-healing effect of the decavanadate intercalation and the shielding effect of the sol-gel film.
通过尿素水解法在2024铝合金上原位形成了层状双氢氧化物（LDH）膜，并通过浸涂法制备了十钒酸盐插层的LDH（LDH-V）膜。通过扫描电子显微镜（SEM）研究了微观结构和形态特征。通过电化学阻抗谱（EIS）、扫描电化学显微镜（SECM）和盐雾试验（SST）分析了耐腐蚀性能。SEM结果表明，在LDH-VS膜上形成了完整且无缺陷的表面。防腐结果表明，LDH-VS膜比LDH-S膜具有更好的耐腐蚀性能，尤其是长期耐腐蚀性能。提出了腐蚀防护机制包括十钒酸盐插层的自愈效应和溶胶-凝胶膜的屏蔽效应。
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