Some products on the market require a bright silver coating, but many people may be curious about how to plating a layer of silver on the workpiece? The most commonly used ones are titanium plating, chromium plating, and aluminum plating, but silver plating is still relatively rare as it belongs to heavy metals. Below is a detailed introduction to the silver coating method of pvd coating machine by the vacuum editor, hoping to be helpful to everyone:
How can a pvd coating machine obtain a bright silver layer? There are the following methods to obtain a shiny silver coating:
1) Brushing. After ordinary silver plating, although the coating on the surface of the parts is uniform and the crystallization is fine, it is not bright. Only by brushing the surface of the part with a copper wire brush or copper wire wheel can a bright silver layer be obtained.
2) Pulse silver plating. By using a pulse power supply or periodic commutation power supply for silver plating, the obtained coating not only has fine crystallization and dense coating, but also better dispersion and deep plating ability compared to ordinary silver plating. It can also obtain a shiny silver plating layer without the use of brighteners.
3) Bright silver plating. Whether it is cyanide silver plating or cyanide free silver plating, as long as appropriate additives and brighteners are added, not only can a fully bright silver coating be obtained, but the coating is more detailed, with good reflective performance, and the dispersion ability and deep plating ability of the plating solution are also improved. By adding additives, various coatings with different properties can be obtained, such as semi bright coatings, full bright coatings, improving the weldability of coatings, increasing the hardness and wear resistance of coatings, etc.
The pvd coating machine can not only deposit silver, but also deposit various other film layers, depending on the customer's needs and where their workpiece is located. The desired effect is different, and the coating also varies.