镀锌板磷化处理方式和介绍
天物彩板专注彩涂卷行业17年——镀锌板磷化处理方式和介绍_河北镀锌板批发价格请拨打网站上方电话免费咨询
在磷化处理方面，磷化膜的存在可以大大提高涂层的附着力，并具有一定的耐腐蚀性，即经过磷化处理和干燥后，无油，长时间不会出现腐蚀、白锈等缺陷。同时，对于深冲材料，磷化膜的存在将大大提高其成形能力。汽车厂的磷化膜可以生长在预磷化膜未覆盖的地方，改善涂装工艺，因为很多用户可以在未处理的镀锌板或热镀锌带加工后进行后处理，如脱脂后磷化，但对用户自己的工厂污染严重，所以磷化后，用户可以直接用热水冲洗脱脂后进行涂装，这样可以减轻用户对环保的压力。
这类产品一般用于家用电器，如一些洗衣机外壳、办公用品柜、一些电器柜等，经过加工后可以进行喷涂和喷涂。
另一种磷化处理更多地用于汽车。这种磷化称为预磷化。预磷化利用磷化膜的自润滑作用，改善加工过程中的金属流动，有利于成形的顺利进行。因此，在后续预磷化成形过程中，冲压问题相对较少，且冲压和粗化的概率较低。
磷化产品的使用也会出现一些问题。
一是家电板脱脂时间过长，碱性过强，导致磷化膜部分溶解，锌层局部腐蚀，涂装后可能导致漆层出现气泡或凹坑。一般的对策是降低脱脂浓度，提高表面活性剂浓度。
第二个方面是汽车厂钢卷存放时间过长，表面防锈油难以清除。因此，汽车制造厂应控制储存时间。一旦出现问题，应调整脱脂溶液的浓度。最极端的方法是用砂皮打磨表面磷化层。
In terms of phosphating treatment, the existence of phosphating film can greatly improve the adhesion of coating and has certain corrosion resistance, that is, after phosphating treatment and drying, without oil, there will be no corrosion, white rust
and other defects for a long time. At the same time, for deep drawing materials, the existence of phosphating film will greatly improve its forming ability. The phosphating film in car factory can grow in the place where the pre phosphating film is
not covered, Improve the coating process, because many users can carry out post-treatment after processing the untreated galvanized plate or hot-dip galvanized strip, such as phosphating after degreasing, but the pollution to the user's own factory
is serious, so after phosphating, the user can directly carry out coating after rinsing and degreasing with hot water, This can reduce the pressure of users on environmental protection.
This kind is generally used in household appliances, such as some washing machine shells, office supplies cabinets, and some electrical cabinets, which can be sprayed and sprayed after processing.
Another kind of phosphating treatment is more used
in automobiles. This kind of phosphating is called pre phosphating. Pre phosphating uses the self-lubricating effect of phosphating film to improve the metal flow in the processing process and is conducive to the smooth progress of forming. Therefore,
there are relatively few stamping problems in the later forming process with pre phosphating, and the probability of punching and roughening is low.
There will also be some problems in the use of phosphating products.
The first is that the
degreasing time of household appliance board is too long and the alkalinity is too strong, resulting in partial dissolution of phosphating film and local corrosion of zinc layer, which may lead to bubbles or pits in the paint layer after coating. Generally,
the countermeasures are to reduce the degreasing concentration and increase the surfactant concentration.
The second aspect is that in the automobile factory, the storage time of steel coil is too long and the surface antirust oil is difficult to
remove. Therefore, the automobile factory should control the storage time. Once there is a problem, the concentration of degreasing solution should be adjusted. The most extreme method is to polish the surface phosphating layer with sand skin.
