Electrophoresis finishing process is the stainless steel industry a common surface treatment, electrophoresis in 1807 by a Russian Moscow university named Ferdinand Frederick Royce found professor, but in the midst of the world’s industrial technology is low, there is no ability to produce a film about electrophoresis technology of equipment, such a predicament lasted more than one hundred years, until 1936, Sweden’s a man named A.W.K. desiree, uz scholars have designed a mobile interface electrophoresis apparatus, electrophoresis technology is also in the 6, 70 s last century,After decades of development and precipitation, so that it is really used in industry.
First of all, I want to talk about the characteristics and principles of the phenomenon of electrophoresis. Electrophoresis refers to the movement of charged particles towards their typical opposite electrode under the action of an electric field.Generally used for stainless steel, aluminum alloy and other metals, can make the product present a variety of colors, in the raw material does not harm the fundamental metal luster, but also can enhance the surface performance of its raw material, and has strong corrosion resistance, with electroplating process has a similar trick.
In the early stage of the popularization of electrophoretic technology, ford motor co., ltd. in the United States was the first to use this process, which was first applied to the primer of cars. Later, due to the outstanding anti-corrosion and anti-rust ability of electrophoretic technology, this technology was favored by military leaders, and was soon widely used in the field of military industry.However, due to a series of problems, such as the stability of the technology and the blockade of the technology at that time, electrophoretic technology was not popularized, and it was not applied in the field of daily hardware until the last 20 years.
The main process of electrophoresis: pretreatment, electrophoresis, drying
Pretreatment is also the most exquisite point in the whole process, the whole pretreatment roughly has: oil removal, rust removal, phosphating, three small steps.
Most of the solutions used for oil removal are thermal alkaline chemical oil removal solutions, the temperature is probably controlled at 60℃ (steam heating), the time is controlled at about 20 minutes, and then wash the substrate with hot water at 60℃ for two minutes.If you do not remove the oil, it is likely to affect the surface treatment process processing effect.
Then is the derusting, generally will use hydrochloric acid derusting liquid on the plate derusting, and then with cleaning agent in room temperature rinse about 10 to 20 minutes.Rinse with cold water for another minute.
Then use 60℃ phosphating liquid to phosphating the plate for 10 minutes, and then use the drugs with phosphating liquid to passivate at room temperature for 1 ~ 2 minutes.So the whole pre-processing process is complete.
Post time: Jun-12-2019