Preparation and Cavilation Erosion Resistance of High Strength Nanocoating Cylinder Liner

Abstract

Using ammonium persulfate as an oxidant and nano-silica as dispersing medium,o-toluidine was oxidized to form a core-shell structure poly (o-toluidine)/nano-SiO2 particle. Investigation of particle yield by ICP-AES method, the adhesion method was used to study the adhesion between coating and cylinder liner. The cavitation resistance of the coating cylinder was studied by the vibration gas cavitation method. The results showed that poly(o-toluidine) was uniformly coated around the nano-silica particles to which forms stable poly (o-toluidine)/nano-SiO2 with core-shell structure, when m(SiO2):m(POT)=1:8，n((NH4)2S2O3):n(POT)=1:1,and the temperature was controlled from 10 to 15°C, the composite poly(o-toluidine)/nano-SiO2 particles were prepared and the yield reached 85%. Composite poly(o-toluidine)/nano-SiO2 particles as a functional component and epoxy resin as a film-forming agent were used to prepare composite poly(o-toluidine)/nano-SiO2/epoxy resin coated cylinder liner with good cavitation resistance, t100=885min.