航天标准件螺母滚镀锌工艺  

Barrel zinc plating of nuts for aerospace fasteners

作　　者：肖世明[1] 李吉丹[1] 陈伟[1] 杨宇 金哲 李超[1] 樊腾 

机构地区：[1]首都航天机械公司,北京100076

出　　处：《电镀与涂饰》2018年第1期5-8,共4页Electroplating & Finishing

基　　金：中国运载火箭技术研究院工艺改进与研究项目(GYGJ13-211-34)

摘　　要：对不同螺纹孔深度的45钢螺母（重约3g）进行滚镀锌,镀液组成和工艺条件为：NaCN100~120g/L,NaOH80~100g/L,ZnO40~50g/L,Na2S1~5g/L,装载量30~45g/L,室温,电流300~400A,转动线速率40mm/s.本工艺适用于螺纹孔深径比大于1.0∶1.5的螺母,所得镀层厚度均匀,外观和结合力良好,耐蚀性满足QJ452–1988的要求.Barrel zinc plating was carried out for nuts made of 45 steel （about 3 g per each） with different thread hole depths. from a bath composed of NaCN 100-120 g/L, NaOH 80-100 g/L, ZnO 40-50 g/L, and Na2S 1-5 g/L under the conditions of room temperature, current 300-400 A, loading capacity 30-45 g/L, and liner rate of rotation 40 mm/s. The given process is suitable for the nuts with a ratio of thread hole depth to diameter higher than 1.0：1.5. The obtained zinc coatings feature a uniform thickness, good appearance and adhesion, and a corrosion resistance meeting the requirement of QJ 452-1988 standard.

关 键 词：航天标准件 螺母 碳钢 锌 滚镀 

分 类 号：TQ153.15[化学工程—电化学工业]