Issue 13, 2007

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

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
06 Dec 2006
Accepted
30 Jan 2007
First published
13 Feb 2007

Dalton Trans., 2007, 1300-1308

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

R. J. Cooper, P. J. Camp, D. K. Henderson, P. A. Lovatt, D. A. Nation, S. Richards and P. A. Tasker, Dalton Trans., 2007, 1300 DOI: 10.1039/B617599F

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