“…3−5 To provide Al alloys with active corrosion protection qualities, several coating techniques have been investigated during the past decades, including polymer coatings, 6 metallic oxide films, 7,8 and layered double hydroxides (LDHs)-based films. 9−14 LDHs, as a representative of inorganic layered compounds with excellent anion-exchange ability and compositional flexibility, 15,16 are widely used for self-healing 'smart' films on various metallic substrates (Al, [9][10][11][12][13][14]16 Mg, 17−19 Zn, 20 and their alloys) in a cost-effective way. 21 LDH films demonstrate an active response to corrosion reactions by releasing corrosion inhibitor anions (like VO x n− , 22−25 MoO 4 , 2−26 8-hydroxyquinolate, 27 2-mercaptobenzothialzole, 28 and amino acid 29 ) into their interlayers.…”