The alkali corrosion rate of aluminum parts is different under different concentration and temperature con-ditions.When tested with LY12 material,the aperture loss of precision holes of part is generally 3 μm～6 μm,and it can be up to 8um under limit temperature and concentration conditions allowed by the tank liquid process.After hard anodizing,a 5 μm grinding is usually necessary to meet the requirements of roughness 0.8 and hardness 250 Hv.When confirming the size before anodizing,the design and assembly requirements,coating thickness requirements,re-moval amount of alkali corrosion process and the reserved grinding allowance should be taken into consideration.At the same time,in order to satisfy the size requirements after hard anodizing,the size before hard anodizing can be re-laxed by about 13 μm.
关键词
硬质阳极氧化/高精度尺寸/碱腐蚀工序/研磨
Key words
Hard anodizing/High-precision dimension/Alkali corrosion process/Grinding
维普
万方数据