Study of Removing Tin Techniques for Reflow Conductor Roll
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摘要: 粘锡是电镀锡机组软熔导电辊失效的主要原因,应用化学方法脱锡是延长导电辊寿命的重要途径。开发了氢氯化钠(钾)为主要组成,并加入适量亚铅酸钠(钾)和硝酸(亚硝酸)钠配制而成脱锡剂,当脱锡剂温度为40- 80℃,导电辊表面温度为40-70℃时,对粘锡导电辊具有很好的脱锡效果。粘锡导电辊脱锡后的表面粗糙度可以恢复到4.0μm以上,导电辊使用寿命提高80%,降低导电辊修复成本90%,并大幅度减少导电辊更换时间,提高电镀锡机组生产作业率。Abstract: Adhering tin is the main cause that reflow conductor roll abates which works in the electroplating tin line (ETL). Removing the tin by means of chemical method is the important measures prolonging the servicing life of conductor roll. The tin remover whose main compositions are NaOH and KOH and assistant compositions are Na2PbO2 or K2PbO2 and NaNO3 or NaNO2 has excellent removing tin effect, while the temperature of removing tin liquid is 40- 80℃, and the temperature of conductor roll reaches 40-70℃. After removing the adhering tin layer of reflow conductor roll, the roughness of adhering tin conductor roll can resume to 4.0μm, its service life is increased by 80%, and repairing cost is decreased by 90%, and replacing conductor roll time can be obviously decreased, and production rate of ETL can be enhanced.
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Key words:
- electroplating tin /
- reflow conductor roll /
- removing tin agent /
- roughness
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