内腔电泳不良的原因分析与改善

Analysis of the Causes and Improvement for Poor Electrophoresis of Inner Cavity

针对整车电泳膜厚在电泳倒槽清洗后突然上升,但部分底盘骨架内腔却无电泳漆膜的问题,通过提高电泳电压及时间等临时手段,骨架内腔的膜厚依然不能达到工艺质量的要求。经检测电泳槽液的泳透力后,确定车身外表电泳膜厚上升是因泳透力低导致。通过添加泳透力提升助剂、调整电泳槽液参数的实际管控点等方法,电泳槽液泳透力恢复正常,底盘骨架内腔膜厚达到工艺质量的要求。

Aiming at the problem that the electrophoretic film thickness of the whole vehicle suddenly increased after cleaning the electrophoretic bath,and even there was no electrophoretic film in part of the inner cavity of the chassis frame,the electrophoretic film thickness of the inner cavity of the frame still can not meet the requirements of process quality by improving the electrophoretic voltage and time,etc.After detecting the throwing power of the electrophoretic solution,it was confirmed that the increase of the electrophoretic film thickness was caused by the low throwing power.By adding electrophoretic assistant to improve the throwing power,adjusting the actual control value of electrophoretic solution parameters,etc.,the throwing power of electrophoretic solution was restored to the normal level.At the same time,the electrophoretic film thickness in the inner cavity of chassis frame meets the requirements of process quality.