航天标准件螺母滚镀锌工艺
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摘要
<正>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:Na CN 100～120 g/L,Na OH 80～100 g/L,Zn O 40～50 g/L,Na2S 1～5 g/L,装载量30～45 g/L,室温,电流300～400 A,转动线速率40 mm/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QJ 452–1988的要求。
Barrel zinc plating was carried out for nuts made of 45 steel(about 3g per each) with different thread hole depths. from a bath composed of Na CN 100-120 g/L, Na OH 80-100 g/L, Zn O 40-50 g/L, and Na2 S 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.
Barrel zinc plating was carried out for nuts made of 45 steel(about 3g per each) with different thread hole depths. from a bath composed of Na CN 100-120 g/L, Na OH 80-100 g/L, Zn O 40-50 g/L, and Na2 S 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.
引文
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[2]张筠.氰化镀锌层厚度控制的初探[J].电镀与环保,2011,31(5):47-48.
[3]肖世明,佟玮,马丽翠,等.螺栓标准件滚镀锌工艺技术研究[J].电镀与精饰,2017,39(7):26-29,46.
[4]袁诗璞.滚镀设备及工艺实践[J].涂装与电镀,2011(6):39-44.
[5]石磊,王光明,许峰源,等.20钢套环滚镀锌工艺及镀层性能[J].电镀与涂饰,2013,32(3):14-16.
[6]潘国锋.电子开关接插件滚镀银工艺[J].电镀与涂饰,2012,31(6):13-15.
[7]范小玲,谢金平,黄崴,等.钢铁基体上HEDP体系无氰滚镀铜工艺[J].电镀与涂饰,2015,34(9):487-490.