航天用T9A-D弹簧表面离子液体镀Al工艺研究  

Study on ionic liquid Al plating technology on surface of T9A-D spring for aerospace applications

作　　者：宋启良 李吉丹 郑玉杰 张联英 陈林辉 杨宇 Song Qiliang;Li Jidan;Zheng Yujie;Zhang Lianying;Chen Linhui;Yang Yu(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：《电镀与精饰》2024年第2期10-16,共7页Plating & Finishing

摘　　要：针对弹性金属材料在表面电镀处理过程中易发生析氢现象,进而降低材料的安全稳定性,产生氢脆隐患,采用离子液体镀Al技术在T9A-D弹簧和同材质试片的表面进行改性处理,并对离子液体镀Al弹簧和试片进行形貌表征和相关性能研究。研究发现:宏观上,离子液体镀Al层连续、均匀、致密、色泽一致;微观上,Al镀层晶粒大小均匀,排列致密,无缺陷产生,截面上镀层与基体间结合良好,界面分明,无空隙,镀厚介于8.91~11.20μm,镀厚均匀。经盐雾实验测试,96 h无白色腐蚀产物出现,336 h无红色腐蚀产物出现,耐蚀性良好。经过氢含量测试,弹簧基体氢含量无增加趋势,弹簧镀Al后无氢脆倾向。弹簧镀铝前、后力值波动小于1.8 N;经划格法检测,镀Al层与弹基体间结合力良好,无脱落现象。The phenomenon of hydrogen evolution is easy to occur in the surface electroplating process of elastic metal materials,which reduces the safety and stability of the materials and causes the hidden danger of hydrogen embrittlement.The surface of T9A-D spring and sample was modified by ionic liquid plating technology,and the morphology characterization and related properties of the spring and sample were studied.The results show that the ionic liquid plating Al layer is macroscopically continuous,uniform,dense and consistent color.Microcosmically,Al coating has uniform grain size,compact arrangement and no defect.The coating on the cross section is well combined with the substrate,the interface is clear,no gap,the plating thickness is between 8.91-11.20μm,the plating thickness is uniform.In terms of performance,after salt spray test,no white corrosion products appear at 96 h and no red corrosion products appear at 336 h,showing good corrosion resistance.After hydrogen content test,the spring hydrogen content does not change,spring after electroplating Al has no hydrogen embrittlement tendency.The fluctuation of spring elasticity value before and after aluminum plating is less than 1.8 N.The bonding force between the Al plating layer and the elastic matrix is good after grid detection and there is no shedding phenomenon.

关 键 词：铝镀层 离子液体 耐蚀性 弹簧 晶粒 

分 类 号：TQ153.1[化学工程—电化学工业]