Ni-Al polyvanadate layered double hydroxide with nanoceria decoration for enhanced corrosion protection of aluminium alloy

Duplex Coating Combing Vanadate-Intercalated Layered Double Hydroxide and Ce-Doped Sol–Gel Layers on Aluminum Alloy for Active Corrosion Protection

“…A strong absorption band around 3450 cm −1 can be identified as the hydroxyl stretching band m (OHstr), which is caused by the interlayer water molecules in the LDH nanosheet array structure and the water adsorbed on the surface of silane film. Another weak band centered at around 1633 cm −1 is generated by the hydroxyl deformation mode of water δ (H 2 O) [ 14 ]. In the range 500–800 cm −1 , the bands are attributed to M-O and M-O-M lattice vibrations [ 26 ].…”

“…However, Cr 6+ can cause serious pollution to the environment and even serious harm to human health [ 5 , 6 , 7 ]. Research on the development of new anticorrosion coatings, such as anodic oxidation [ 8 , 9 ], electroplating [ 10 , 11 ], organic coatings [ 12 , 13 ] and LDH [ 14 , 15 , 16 ], is of great significance for replacing chromate conversion coatings and realizing the long-term corrosion protection of aluminum alloys. With a single film system, it is often difficult to meet the corrosion resistance requirements of practical application scenarios of aluminum alloys.…”

Emerging Layered Materials and Their Applications in the Corrosion Protection of Metals and Alloys

“…This has the potential to give long-term corrosion protection. Various corrosion inhibitors have been incorporated as the anionic species within LDHs, and these include inorganic compounds such as molybdate [100][101][102][103], permanganate [104], nitrate [105][106][107], nitrite [77,108,109], phosphate [62], phenylphosphonate [110] and vanadate [111][112][113]. Also, organic inhibitors such as benzoate, 3-aminopropyltriethoxysilane, 8-hydroxyquinoline [63], 5-aminoindazole [90], benzotriazole [114], mercaptobenzothiazole [96,115,116], 2-mercaptobenzothiazole [117], thiophene derivatives [118], aspartic acid [119], 8-hydroxyquinoline [120], triazoles [121], α-amino acids [122] and 2-benzothiazolylthio-succinate [123] have been incorporated as the anionic species in LDHs.…”

Modification of Mg/Al-LDH by vanadate: effects on tribological properties and corrosion resistance

“…In a corrosive environment, LDH loaded with vanadate plays the dual role of capturing corrosive chloride ions to reduce the chloride ion concentration and releasing the anionic corrosion inhibitor to the metal surface and adequately protecting the surface. 11 LDH films double-doped with rare earth elements cerium and vanadate can maintain good stability in NaCl solutions, mainly attributed to the synergistic effect of cerium ions and vanadate anions. 37 Vanadate has been widely used as a corrosion inhibitor to modify LDH coatings, however, the tribological properties of vanadate intercalated LDH have not been reported, especially the dual effect of vanadate on the tribological properties and corrosion resistance of LDH composite coatings.…”

“…7,8 Due to its unique laminar structure, the versatility of the combination of laminate cations and interlayer anions makes LDH highly attractive in practical applications. Currently, LDH has been widely used in metal corrosion protection, [9][10][11] frictional wear, 12,13 etc.…”