Original free sliding oscillating ball-on-flat tribotests reveal some features of the frictional behaviour of alkylphosphonic acid self-assembled molecules
Résumé
Previous studies have highlighted the interest of self-assembled alkylphosphonic acid as lubricant for deep-drawing process. This functionalization method consists in low concentrated in a solvent molecules self-adsorption on oxidized metallic surfaces. Main practical interests of this method for metal-sheet working processes are grafting of molecules method easily carried out, very low environmental impact, and the lack of cleaning operation usually necessary after process completion. But above all, classical linear-reciprocal or pin-on-disc tribotests have demonstrated high lubricating performance of this functionalization method compared with classical lubricants used in deep-drawing process.