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New star interprets the process flow of hard chromium plating
(1) The hard chromium plating of parts shall be subject to degreasing and activation strictly according to the pretreatment requirements, and the non plating parts shall be subject to insulation treatment.
（2）要制造或选用合适的夹具（挂具）挂装好零件。
（3）要合理的制造阳极，坚持阳极导电良好，（不良呈黄色），这一点对坚持镀层质量是十分重要的。
（4）镀铬过程中，有必要严厉控制溶液的温度在技术范围内，改变范围在±3°C，依据镀液温度，镀层厚度及运用的添加剂来断定电流密度，电镀时刻应依据电流密度和阴极电流效率等控制。零件的受镀面积要丈量和核算精确，选用不一样的电流密度电镀铬镀层所需时刻也不一样。
（5）零件入槽后，通电前应预热3-15分钟，然后进行短时刻的阳极处理，阶梯给电或不进行阳极处理，直接进行阶梯给电，从小电流开端，在3-5分钟内逐步增大到正常电流密度，此更适用于不能进行阳极处理的基材。
（6）镀铬时，铬镀层需求很厚时，只能选用技术范围内的电流密度下限值，以确保边角等大电流处不产生结瘤，毛刺等缺点。
（7）镀铬过程中，不允许半途断电。（断电后，再进行电镀，则有必要选用阶梯给电方法进行绕镀）。
（8）零件镀好后，最好用热水清洁收回，再清洁。
（9）零件镀好后，要尽快进行除氢处理，最好在10小时内进行。
This article is from:http://www.newstar-china.com/
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