In addition to being able to meet the requirements of extremely complex high-precision parts, they are also capable of meeting the mass production requirements of a wide variety of thin-walled parts. The variety of conceivable applications is constantly growing wider. Die-casting parts made of zinc alloy have established themselves as the standard in the industry in recent years. The pre-plating treatment, followed by electroplating or painting, is required for the majority of these more complex and highly decorative zinc alloy die-casting parts. This is because these parts have a higher degree of complexity.

When it comes to treating components in order to get them ready for plating, conventional processes typically involve the utilization of rolling, vibration, and various other forms of mechanical polishing. When applied to specific zinc alloy die-casting parts that have intricate shapes, this method produces a finishing effect that is subpar, has a high labor intensity, and has a low efficiency rate. On the other hand, the labor intensity is high, and the efficiency level is low. This is indeed the situation. The production of zinc alloy die-casting parts does not impose any restrictions on the form of the finished product, it is easy to organize large-scale continuous production, the chemical polishing equipment is straightforward, the production cost is reasonable, the production efficiency is high, and the production does not impose any restrictions on the form of the production equipment. The pre-processing stage consists of a variety of different processes, some of which include painting and electroplating. The chemical polishing process makes use of the varying dissolution rates of the convex and concave parts that are already present on the surface of the metal. The chemical polishing process can be carried out thanks to this particular mechanism, which makes it possible. Utilizing a wide variety of different chemical reactions is required in order to carry out the process of chemical polishing.

Die-casting parts made of zinc alloy contain a wide variety of other elements in addition to the mechanical impurities that are naturally present in the material.During this time, the sticky film will frequently be in a state that can be described as being activated.It is possible for macromolecules and other types of molecules to combine with the dissolved metal ions because the solution contains cations. This makes it possible for the combination to take place.When this process is finished, the only things that are left behind are the metal and the cations, which is significant from the point of view of obstruction.Both the chemical polishing procedure and the procedure that is performed after it are included in this step.
Yuge has conducted a number of screenings of different formulas, and the results of these tests indicate that the following process formula may have the capability of satisfying the chemical polishing surface quality requirements of zinc alloy die castings.This is because chemical polishing of zinc alloy die castings is a technique that has only been around for a relatively short amount of time.Because of this, the workpiece will attract acid ions that are present in the polishing fluid. This is due to the fact that the polishing fluid contains acid ions.For this reason, the treatment that is carried out after the process is considered to be of utmost significance.Getting rid of the aluminum and improving the polishing effect can both be accomplished through the use of hydrofluoric acid, which is one of the most effective methods.This is because aluminum has a corrosive effect on other materials.During the polishing process, the surface active agent will produce a thin film of adsorption on the surface of the substrate. This will take place simultaneously with the polishing process.This film helps to promote and improve the polishing effect, which, in turn, contributes to an increase in the polishing's overall efficiency.The results of the study provided clear evidence for this assertion.The temperature of the polishing fluid is going through a transition right now.When the temperature of the liquid is too high and when the amount of time spent polishing is too short, the viscosity of the chemical polishing liquid will decrease. Additionally, the dissolution rate of the metal passivation film will increase, and there will be an imbalance in the activation versus passivation ratio.As a direct result of this, the temperature of the polishing process should be maintained at a consistent level that falls somewhere between 10 and 30 degrees Celsius at all times.On the other hand, if time is allowed to pass for an excessively long period of time, corrosion will easily take place. This will result in the appearance of spots and stains caused by corrosion on the surface of the workpiece if the time is allowed to pass for an excessively long period of time.

3. Die castings typically make use of zinc alloys as the material of choice. The processing of grain can benefit from the utilization of aluminum in some ways. Crystalline corrosion can be significantly avoided and the metal's strength and hardness can significantly improve if the temperature is maintained within this range. 03% to 0. Impurity elements include, but are not limited to: lead, cadmium, tin, iron, and silicon. For the best possible results, the concentration of each of zinc alloy die casting these should be kept as low as is practically possible. It is possible that there will be an excessive amount of corrosion if there is a high concentration of impurities. This is due to the fact that impurities accelerate the corrosion process. There is only a very slight amount of light that can be perceived here. In addition, it may be challenging to eliminate these compounds. In the lower layer of the zinc alloy surface, pores and internal loose shrinkage holes will develop if the selection process is not carried out correctly.

The demonstration of Junying's theory in practice demonstrates that it is possible to switch from using mechanical polishing to using chemical polishing. This was demonstrated by the die casting products application of Junying's theory in practice. To be more specific, in order to polish the surfaces of intricate zinc alloy die castings.