Furan resins as replacement of phenolic protective coatings: Structural, mechanical and functional characterization

G. RIVERO; L. FASCE; S. CERÉ; L. MANFREDI

PROGRESS IN ORGANIC COATINGS

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2014 vol. 77 p. 247 - 256

0300-9440

tPhenolic coatings are usually a convenient and economical way to protect metallic materials against wearand corrosion. Furan resins are analogous to phenolics, as they are obtained by replacing formaldehydeby furfural in their formulation. In this work, a furan resin based on furfural and phenol was synthesizedand used as an aluminum coating. Thus, toxic emissions of formaldehyde were avoided, while a biobasedderivative was used instead. The performance of the proposed resin was compared with the one of atraditional phenolic resin. Physicochemical characteristics including chemical structure, surface polarityand glass transition temperature were evaluated by means of Fourier transform infrared spectroscopy,contact angle measurements and dynamic?mechanical analysis, respectively. Nanomechanical and nan-otribological properties were assessed by depth sensing indentation techniques. As well, the corrosionresistance of the furan coating was determined by potentiodynamic polarization tests. The obtainedresults validate the furan resin as a feasible alternative to phenolics to protect aluminum.