低表面粗糙度ZL105A砂铸铝零件的硬质阳极氧化工艺改进  

Improvement of Hard Anodizing Process for Low Surface Roughness ZL105A Sand-Cast Aluminum Parts

作　　者：秦贵芬 李嘉烁 李祥 王梅丰[2] 童子航 王夏妍 QIN Guifen;LI Jiashuo;LI Xiang;WANG Meifeng;TONG Zihang;WANG Xiayan(Aecc Guizhou Liyang Aviation Power Co.,Ltd.,Guiyang 550014,China;School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China;Guizhou Aerospace Precision Manufacturing Co.,Ltd.,Zunyi 563000,China)

机构地区：[1]中国航发贵州黎阳航空动力有限公司,贵阳550014 [2]南昌航空大学材料科学与工程学院,南昌330063 [3]贵州航天精工制造有限公司,遵义563000

出　　处：《腐蚀与防护》2023年第9期90-93,共4页Corrosion & Protection

摘　　要：分析了经硬质阳极氧化及磨抛后ZL105A砂铸铝表面粗糙度增大的原因,并对硬质阳极氧化液进行了优化,开发了一种含草酸、硫酸及钝化剂的硬质阳极氧化液。结果表明:经传统硬质氧化和磨抛后,ZL105A砂铸铝零件表面出现宏观孔洞,这是其表面粗糙度不合格的根本原因;开发的硬质阳极氧化液中的钝化剂可以抑制微孔生长,经该氧化液处理后,获得了表面粗糙度为0.2~0.4μm,硬度高于300 HV的硬质阳极氧化膜。By analyzing the reasons for the increase of surface roughness of ZL105A sand-cast aluminum after hard anodic oxidation and grinding,and optimizing the hard anodic oxidation solution,a hard anodic oxidation solution containing oxalic acid,sulfuric acid and passivator was developed.The results showed that macro holes appearred on the surface of ZL105A sand-cast aluminum parts after traditional hard anodizing and grinding,which was the root cause of unqualified surface roughness.The passivation agent in the developed hard anodizing solution could inhibit the growth of micropores.After treatment with the oxidation solution,a hard anodizing film with a surface roughness of 0.2-0.4 μm and a hardness higher than 300 HV was obtained.

关 键 词：ZL105A铝合金 草酸 硬质阳极氧化 表面粗糙度 钝化剂 

分 类 号：TG174[金属学及工艺—金属表面处理]