TY - JOUR
T1 - In situ formation of decavanadate-intercalated layered double hydroxide films on AA2024 and their anti-corrosive properties when combined with hybrid sol gel films
AU - Wu, Junsheng
AU - Peng, Dongdong
AU - He, Yuntao
AU - Du, Xiaoqiong
AU - Zhang, Zhan
AU - Zhang, Bowei
AU - Li, Xiaogang
AU - Huang, Yizhong
N1 - Publisher Copyright:
© 2017 by the authors.
PY - 2017/4/18
Y1 - 2017/4/18
N2 - 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.
AB - 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.
KW - Aluminum alloy
KW - Corrosion protection
KW - Layered double hydroxides (LDHs)
KW - Scanning electrochemical microscopy (SECM)
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U2 - 10.3390/ma10040426
DO - 10.3390/ma10040426
M3 - Article
AN - SCOPUS:85018460996
SN - 1996-1944
VL - 10
JO - Materials
JF - Materials
IS - 4
M1 - 426
ER -