硬质阳极氧化是阳极氧化处理中一种较新的技术。氧化膜层的厚度可达10μ,同时具有很高的硬度,其硬度值内层大于外层,另一方面,因为膜层具有疏孔可以吸收各种润滑剂,因而增加了减磨能力。膜层的导热性很差,熔点可达2050℃,电阻值大,经过封闭处理和浸涂绝缘漆后,电击穿电压可达到2000伏。在大气中有较高的抗蚀能力,由于膜层硬度高,耐磨性强,有良好的绝缘性,与铝基体结合牢固等优点,因此在国防工业和机械工业方面可获得广泛应用。对于特别 Hard anodization is a relatively new technique in anodizing. Oxide film thickness up to 10μ, with high hardness, the hardness of the inner layer than the outer layer, on the other hand, because the film has a hole can absorb a variety of lubricants, thereby increasing the anti-wear capacity. The thermal conductivity of the film is very poor, the melting point of up to 2050 ℃, the resistance value, after the closed treatment and dip insulation paint, electrical breakdown voltage up to 2000 volts. In the atmosphere there is a high corrosion resistance, due to the high hardness of the film, wear resistance, good insulation, combined with the solid aluminum body and so on, so in the defense industry and machinery industry can be widely used. For special