In industrial production and manufacturing process, degreasing is a key step in surface treatment, which directly affects the effect of subsequent processing. Chemical degreasing and electrolytic degreasing are two common degreasing methods, understanding the difference between these two degreasing methods not only helps to choose the right process, but also to improve product quality while controlling production costs.
Difference between electrolytic degreasing and chemical degreasing
The composition of the electrolytic degreasing solution is roughly the same as that of the chemical degreasing solution. The speed of electrolytic degreasing is often higher than that of chemical degreasing, and the oil is cleaned more completely.
The alkalinity of the electrolytic degreasing solution can be lower than that of the chemical degreasing solution, because the saponification is not the main effect at this time, and there is no need to add emulsifiers.
If emulsifiers are used, they will form a large amount of foam floating on the surface of the solution, thus preventing the smooth escape of hydrogen and oxygen.
In order to ensure the quality of the coating, we use electrolytic degreasing to do it before the parts are electroplated into the tank.
What current density is usually used for electrolytic degreasing?
Talking about electrolytic degreasing, we have to talk about the current density of this process parameter, in electric degreasing, if we improve the current density, then it can speed up the degreasing, but when the current density is large to a certain extent, the increase in the speed of degreasing, on the contrary, will not be so fast, but it will cause the file voltage is too high, which will lead to the increase in electrical energy consumption. In the production of the use of Bigely electrolytic degreasing powder BC-1105, the current density is generally controlled at 2-5A / dm2, so that the workpiece surface can be cleaned of solid oil and organic adsorption film (chemical degreasing residual).
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