1. Advantages of aluminum alloy hard oxidation: 1. The surface hardness of aluminum alloy after hard oxidation can reach about HV500. 2. The thickness of the oxide film is 25-250um. 3. Strong adhesion, according to the characteristics of oxidation generated by hard oxidation: 50% of the generated oxide film penetrates inside the aluminum alloy, and 50% adheres to the surface of the aluminum alloy (bidirectional growth). 4. Good insulation: the breakdown voltage can reach 2000V (perfect sealing). 5. Good wear resistance: for copper content not exceeding 2%
The maximum wear index of the aluminum alloy is 3.5mg/1000 revolutions. All other alloy wear index should not exceed 1.5mg/1000 revolutions. 6. Non-toxic: The oxide film and the electrochemical process used to produce the anodic oxide film should be harmless to the human body. Therefore, in order to reduce the weight of the product, the convenience of machining, environmental protection and low toxicity and other requirements in many industries, some parts of some products are currently hard-oxidized by aluminum alloys instead of stainless steel, electroplating hard chrome and other processes.
2. The difference between hard anodizing and ordinary anodizing: 50% of the hard anodized oxide film penetrates inside the aluminum alloy, and 50% is attached to the surface of the aluminum alloy. Therefore, after hard anodizing, the outer size of the product becomes larger, and the inner hole becomes larger. Small.