摘要
传统的铝合金硫酸硬质阳极氧化工艺工作温度低,电流密度和终止电压高,能耗及设备投资加大,节能环保的常温硬质阳极氧化工艺是国内企业多年来急待开发的课题。研究了电解液体系、电源波形、电流密度、温度及时间等工艺参数对6061-T6铝合金硬质阳极氧化膜性能和外观颜色的影响。结果表明,在以硫酸为主的三元电解液体系中,采用直流工作模式,施以1.5～1.8A/dm2的电流密度,在氧化温度(15±2)℃下,可以得到硬度≥350HV、厚度45μm以上的硬质氧化膜,氧化膜的颜色可在浅黄色至褐色间选择,能为航空及地方工业提供实用可行的技术支持。
Conventional hard anodic oxidation process for Al alloys in sulfuric acid is limited to low working temperature,high current density and terminating potential,and needs expensive equipments aside from high energy-consumption.Naturally,it is imperative to develop environmentally acceptable hard anodic oxidation process at ambient temperature for Al alloys.Thus the effects of the process parameters such as electrolyte system,power source,current density,temperature,and time on the appearance and performance of hard anodic oxidation coating on 6061-T6 Al alloy used in oil pumps of airplane were investigated.Results indicated that hard anodic oxidation coating with a hardness of over 350 HV and thickness of over 45μm could be prepared from a three-component electrolyte system of sulfuric acid by using direct current at a density of 1.5~1.8 A/dm2 and temperature of(15±2)℃,and the color of the oxidation coating was controllable from light yellow to dark brown.This could help to provide strong support for the surface engineering of Al alloys in aeronautics industry and other civil industry.
出处
《材料保护》
CAS
CSCD
北大核心
2008年第7期34-36,共3页
Materials Protection
关键词
硬质阳极氧化
铝合金
常温
直流
hard anodic oxidation
aluminum alloys
room temperature
directs wrent
