电泳涂装生产线中电泳漆由于颜料和衬脂凝集，致使电泳漆脱产生麻点、粗粒的现象统称为颜料凝集,凝集有两种类型。

The phenomenon of pigment aggregation and coarse particles caused by the coagulation of pigments and lining grease in the electrophoretic coating production line is collectively referred to as pigment aggregation. There are two types of aggregation.

一种是电泳槽液中已产生凝集，在电淋时巳凝集的树脂颜料粒子受重力的作用，沉积在工件的水平表面上而被漆膜包裹。这类凝集很容易看出，粒子主要出现在水平面的上表面，在垂直面和水平面的下表面很少见。

One type is that the resin pigment particles that have already agglomerated in the electrophoresis bath solution are deposited on the horizontal surface of the workpiece under the action of gravity and wrapped in a paint film during electroleaching. It is easy to see that this type of aggregation mainly occurs on the upper surface of the horizontal plane, while it is rare on the vertical and lower surfaces of the horizontal plane.

另一种凝集是产生在电淋过程中，它与工件的漆前处理不当，涂装条件差等有关。在电泳涂漆时，颜料大都由树脂的携带面泳涂在工件的表面上，因此颜料的凝集大都与树脂的凝集有关。凝集可能由补加的涂料或槽液自身的变化所产生，电淋漆经长期存放或储存的温度过高，过低(受过冷冻)都可能使原漆溶解不良。在补漆过程中，补给的方法很重要，补加双组分的阴极电泳漆或低胺的阳极电2求漆时尤其是这样，因为这二种情况，电泳漆的橱脂是不完全中和的，在稽液中不易溶解和分散。前者要求将双组分按比侧混合，后者则要求与槽液混合，经过充分搅拌和熟化后再加入槽中。

Another type of condensation occurs during the electric spraying process, which is related to improper pre-treatment of the workpiece and poor painting conditions. In electrophoretic painting, pigments are mostly carried by the resin and applied to the surface of the workpiece, so the aggregation of pigments is mostly related to the aggregation of the resin. Agglomeration may be caused by changes in the added coating or tank liquid itself. After long-term storage or storage at high or low temperatures (subjected to freezing), the original paint may dissolve poorly. During the paint repair process, the method of replenishment is very important, especially when adding two component cathodic electrophoretic paint or low amine anodic electrophoretic paint, because in both cases, the grease of the electrophoretic paint is not completely neutralized and is not easily dissolved and dispersed in the solution. The former requires the two components to be mixed proportionally, while the latter requires mixing with the tank liquid, thoroughly stirring and maturing before being added to the tank.

在电泳稽审也常常产生树脂和颜料凝聚的现象，产生这种现象的原因可能有三种情况；

In electrophoretic auditing, resin and pigment condensation often occurs, and there are three possible reasons for this phenomenon;

(1)槽液固体分太低，颜料和树脂的分散袄态不稳定，随时会从槽液中折出。

(1) The solid content of the tank liquid is too low, and the dispersion of pigments and resins is unstable, which can easily break out of the tank liquid at any time.

(2)槽液的更新期太长(超过半年以上)，由于树脂的老化、聚合及酸败而不溶。因此_一般根据产量计算更新期超过三个月以上，就不推荐采用电泳涂装。

(2) The update period of the tank liquid is too long (more than half a year), and it is insoluble due to the aging, polymerization, and rancidity of the resin. Therefore_ Generally, if the update period exceeds three months based on production, it is not recommended to use electrophoretic coating.

(3)漆前表面处理不净、工件表面含有酸或碱类物质，都可能在电l泳过程中产生相应的中和反应而使树脂颜料异常地沉积在工件表面上因此前处理的水洗，要求反复冲洗，最后要用去离子水清洗。

(3) Poor surface treatment before painting, as well as the presence of acid or alkali substances on the surface of the workpiece, may cause corresponding neutralization reactions during the electrophoretic process, causing abnormal deposition of resin pigments on the surface of the workpiece. Therefore, repeated washing is required for the pre-treatment, and finally, deionized water is used for cleaning.

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