期刊
RSC ADVANCES
卷 6, 期 17, 页码 13942-13952出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra27286f
关键词
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资金
- FCT/MEC [POCI-01-0145-FEDER-007679, UID/CTM/50011/2013]
- FEDER
- MULTISURF (Marie Sklodowska-Curie grant) [645676]
- FCT [IF/00856/2013, IF/00347/2013]
In this work, a functional sealing of a TSA anodic layer on AA2024 is suggested based upon the formation of inhibitor-containing Zn-Al layered double hydroxides (LDH). The LDH structures are formed in the pores of the anodic layer and on top of it as a result of hydrothermal treatment in a Zn2+-containing bath as shown by the structure, morphology and composition analysis. The resulting LDHs were loaded with a well-known corrosion inhibitor (vanadate). Electrochemical impedance spectroscopy, salt spray tests and scanning vibrating electrode techniques have shown a remarkable improvement in corrosion resistance of the LDH-modified sample in comparison with conventional hot-water sealing. The vanadate-loaded LDHs rendered a significant long-term active protection for the covered aluminum alloy substrate.
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