30CrMnSiA合金钢航天零件表面离子液体电镀铝的性能  

Properties of aluminum coatings electroplated in an ionic liquid on 30CrMnSiA alloy steel parts for aerospace application

作　　者：宋启良 李吉丹 郑玉杰 张联英 孙传伟 韩涛 宋强 SONG Qiliang;LI Jidan;ZHENG Yujie;ZHANG Lianying;SUN Chuanwei;HAN Tao;SONG Qiang(Capital Aerospace Machinery Co.,Ltd.,Beijing 100076,China)

机构地区：[1]首都航天机械有限公司,北京100076

出　　处：《电镀与涂饰》2023年第19期13-20,共8页Electroplating & Finishing

摘　　要：采用含AlCl3与1−乙基−3−甲基咪唑氯盐的离子液体对航天用30CrMnSiA材质的紧固垫片和连接器电镀Al。通过金相显微镜、扫描电镜(SEM)和能谱仪(EDS)分析了Al镀层的微观形貌和元素组成,并检测了镀Al试样的相关性能。结果表明,Al镀层分布均匀,无漏镀、起皮等缺陷,晶粒大小一致,维氏硬度为35~40 HV,结合力良好,中性盐雾试验96 h无白锈、336 h无红锈,耐磨性良好,无氢脆现象,综合性能满足航天产品的要求。Aluminum electroplating was carried out on the surface of 30CrMnSiA steel fastening gaskets and connectors for aerospace application in an ionic liquid comprising AlCl3 and 1-ethyl-3-methylimidazolium chloride.The microstructure and elemental composition of Al coating were analyzed by metallography,scanning electron microscopy(SEM),and energy�dispersive spectroscopy(EDS).Some properties of Al-electroplated specimens were tested.The results showed that the Al coating was uniform in distribution and grain size without defects such as skip plating and peeling,free of hydrogen embrittlement,had a Vickers hardness of 35-40 HV,good adhesion and wear resistance,and could endure neutral salt spray test for 96 hours without white rust and for 336 hours without red rust,meeting the requirements of aerospace products.

关 键 词：航天零件 合金结构钢 电镀铝 离子液体 氢脆 

分 类 号：TQ153.19[化学工程—电化学工业]