Prepare And Research On A High Hardness Anodize Oxidation Film Of Aluminum Alloys

The research of this topic is that aluminum alloy ZL108 are proceeded anodize oxidation treatment in acid solution. The aims are to know some major effect factors of ZL108 anodize oxidation treatment in acid solution, and to make sure microscopic structures of ZL108 high hardness anodize oxidation film for developing high rate and highly active anodize oxidation technology.This subject introduces formation mechanics of AL anodize oxidation film, and technology of hard anodic oxidation. Contain characteristic of hard film, field of application, and growth condition of hard film. In this topic we also compare hard film with common anodize oxidation film, and introduce some common crafts of hard anodic oxidation. The focal points of introduction are growth course of aluminum alloys anodize oxidation films and major effect factors. Last we extraction source of this topic, research contents and destination goal of this research.Then, the characters of experimental material ZL108 and experimental installations are discussed in this topic. Major instructions in this topic are methods and routes of this experiments we select. We discuss major factors of influencing membranous layer growth .They contain components of tank liquor temperature of tank liquor electric current density of oxidization,electric pressure of oxidization,time of oxidization and so on. We analysis anodize oxidation film's microstructure of aluminum alloy ZL108 from this experiment. Then we get corresponding relation between microstructure of anodize oxidation film and effect factors of oxidation, and discuss mechanics of film forming of aluminum alloy ZL108 under different technological parameters.Source pulse and current waveform have influence on thickness and hardness of oxidation film. In trapezoidal pulse of current waveform, hard oxidation film was superiority. The thickness of oxidation film by adopting trapezoidal pulse is thicker than by adopting square. The forming film speed by adopting trapezoidal pulse is quicker than by adopting square. But adopting rising edge and trailing edge of slow trapezoidal pulse, thickness of oxidation film becomes thinner and forming film speed becomes slower. Oxide time is not more long more good, the extension oxidize time would only make oxide film loose .Adopting the temperature of lower slot liquid can acquire the fine and compact film. Low temperature electrolyte with high oxidize the electric current density bottom can be bom high hardness oxide film.