Phosphonic acid-containing polysulfones as anticorrosive layers

Edouard Chauveau (1) , Catherine Marestin (1) , Régis Mercier (1) , Alexis Brunaux (2) , Vincent Martin (2) , Ricardo P. Nogueira (2) , Aurélien Percheron , Virginie Roche (2) , Hughes Waton (3)

1 IMP - Ingénierie des Matériaux Polymères
2 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces
3 ISA - Institut des Sciences Analytiques

As a part of research work to elaborate polymeric materials for metal corrosion protection, we have developed a new family of phosphonic acid-containing polymers. The synthesis and the characterization of polysulfones bearing alkyl phosphonate ester side groups are first described. These polymers are synthesized by direct polycondensation of a phosphonate ester-containing bisphenol by aromatic nucleophilic substitution. The physicochemical properties of the resulting polymers are described. Acidic hydrolysis of phosphonate esters results in the formation of phosphonic acid groups. A series of phosphonic acid-containing polysulfones is therefore obtained and characterized. A preliminary evaluation of the anticorrosive properties of these polymers is described. In 0.25M Na2SO4 solution, the corrosion rate of a polymer-coated mild steel sample is much lower than of the free metal substrate. These results suggest that phosphonic acid-containing polysulfones might be interesting as anticorrosive coatings.

Mots clés: coatings; functionalization of polymers; polycondensation

Domaines: Polymères; Matériaux

Edouard Chauveau, Catherine Marestin, Régis Mercier, Alexis Brunaux, Vincent Martin, et al.. Phosphonic acid-containing polysulfones as anticorrosive layers. Journal of Applied Polymer Science, 2015, 132, pp.1-9. ⟨10.1002/app.41890⟩. ⟨hal-01151638⟩