The binding of phosphonic acids at aluminium oxide surfaces and correlation with passivation of aluminium flake

Rachel J. Cooper, Philip J. Camp, David K. Henderson, Paul A. Lovatt, David A. Nation, Stuart Richards, Peter A. Tasker

Research output: Contribution to journalArticlepeer-review

Abstract

Measurements of adsorption isotherms of a series of thirteen mono- and di-phosphonic acids have shown that these bind strongly to the surface of high surface area aluminium trihydroxide. The incorporation of such phosphonates into a suspension of aluminium flake in an aqueous medium, modelling the continuous phase of a water-based paint, greatly suppresses the evolution of hydrogen. Whilst strong binding of the phosphonate to aluminium oxides is an essential criterion for good passivation, other factors such as the hydrophobicity of the ligand are also important in suppressing hydrogen-evolution.

Original languageEnglish
Pages (from-to)1300-1308
Number of pages9
JournalDalton Transactions
Issue number13
DOIs
Publication statusPublished - 2007

Keywords

  • STRUCTURAL-CHARACTERIZATION
  • UNIDIMENSIONAL CHANNELS
  • CORROSION-INHIBITORS
  • METHYLPHOSPHONATE
  • DERIVATIVES
  • PIGMENTS
  • ALPHA
  • BETA
  • ALUMINOPHOSPHONATE
  • CARBOXYLATES

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