期刊
CORROSION SCIENCE
卷 143, 期 -, 页码 299-313出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2018.08.039
关键词
Active corrosion protection; Layered double hydroxides; Sol-gel coatings; Vanadate inhibitor; Self-healing
资金
- Portuguese Foundation for Science and Technology (FCT) [SFRH/BPD/80754/2011, IF/01284/2015]
- FCT/MEC [POCI-01-0145-FEDER-007679, UID /CTM/50011/2013]
- FEDER
- FCT [IF/00856/2013, SFRH/BD/89490/2012]
- ETAg [PUT1033]
- MULTISURF European project [H2020-MSCA-RISE-2014-645676-MULTISURF]
In this work active corrosion protection of AA2024 by a bilayer system consisting of a LDH (layered double hydroxides) conversion layer coated by a sol-gel film was studied. Impedance and Scanning vibrating electrode technique (SVET) studies demonstrated an efficient active corrosion protection and self-healing abilities of the systems containing LDH layer loaded with vanadate corrosion inhibitor. Microstructural and chemical analysis of the surface after corrosion testing showed accumulation of chlorine signal in LDH coatings. The scavenging of chlorides and release of vanadate inhibitor from LDH can explain high efficiency of corrosion inhibition of AA2024 by the novel protective system.
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