PTFE composite membrane preparation and performance testing on alloy anode oxidation

To improve the abrasive resistance and corrosion resistance of the aluminum alloy, the means of anodic oxidation was used. One kind of abrasive material-PTFE (Polytetrafluoroethylene) was added into the electrolyte of anodic oxidation to deposit in the aluminum alloy film. The orthogonal test were designed to optimize the technological parameters of the composite anode oxidizes and to obtain the composite oxide film in which PTFE was added. The best process scheme of the alloy anode oxidation was determined to improve the abrasive and corrosion resistance of the composite membrane. The best technology scheme is as follows: the temperature is 10°C, the percent of PTFE is 15%, the current density is 2A/dm² and the general oxidation time is 40 minutes.