汽车铝合金轮毂混合酸阳极氧化工艺的研究  

Study on Mixed Acid Anodic Oxidation Technology of Automobile Aluminum Alloy Wheel Hub

作　　者：王蕾[1] 孙育竹[1] WANG Lei;SUN Yuzhu(School of Mechanical Engineering,Henan Polytechnical Institute,Nanyang 473000,China)

机构地区：[1]河南工业职业技术学院机械工程学院

出　　处：《电镀与环保》2019年第6期55-57,共3页Electroplating & Pollution Control

摘　　要：采用混合酸阳极氧化工艺对汽车轮毂用6063铝合金进行了阳极氧化处理。研究了浓硫酸的质量浓度对阳极氧化膜性能的影响。结果表明:铝合金阳极氧化膜是一种典型的蜂窝状结构;适当增加浓硫酸的质量浓度,有利于提高阳极氧化膜的厚度和硬度;当浓硫酸的质量浓度为160 g/L时,阳极氧化膜表面的多孔层均匀、致密,孔径约为50 nm,耐蚀性最佳;当浓硫酸的质量浓度为200 g/L时,大量的H^+使得阳极氧化膜的溶解速率增大,阳极氧化膜的厚度和硬度明显下降。6063 aluminum alloy for automobile wheel hub was anodized in mixed acid electrolyte. The effect of the mass concentration of concentrated sulfuric acid on the properties of anodic oxidation films was studied. The results showed that the anodic oxidation film on aluminum alloy possess a typical honeycomb structure. Increasing the mass concentration of concentrated sulfuric acid was beneficial to increase the thickness and hardness of anodic oxidation film. The porous layer on the surface of anodic oxidation film prepared with 160 g/L concentrated sulfuric acid was uniform and compact with an aperture of about 50 nm and possessed optimal corrosion resistance. When the mass concentration of concentrated sulfuric acid was 200 g/L, a large number of hydrogen ions increased the dissolution rate of anodic oxidation film resulting in a significant decrease in the thickness and hardness of anodic oxidation film.

关 键 词：6063铝合金 阳极氧化 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]