In vacuum ion coating, different gases are used to produce liquid gases with different colors. Argon gas is generally used to create the environment for coating titanium and chromium. Industrial gas filled with nitrogen can produce silver and yellow products, while black or gray products need to be produced by adding acetylene gas and oxygen to produce blue products. In addition to gas, the color of products produced is also affected by conditions such as pressure, temperature, and time.

What principle is utilized in vacuum electroplating?

Under high vacuum conditions, high-purity coated metals (such as aluminum) will freely scatter and settle on the surface of the workpiece after evaporating at high temperatures, forming a coating. Argon is a protective gas to prevent oxidation reactions from affecting the quality of the coating.

What is the use of argon gas in the electroplating process?

Argon does not participate in the reaction, but only increases the pressure to improve the discharge conditions of the target during coating. Argon is not used for coating, but mainly for creating the environment for coating. Nitrogen and argon are both inert gases. After being injected, they can firstly eliminate oxygen to prevent oxidation, and secondly, due to the different proportions of nitrogen and argon in the diffusion pump, different colors can be coated Mainly to change the color of the coated product

How to control the flow rate of argon gas in the vacuum coating industry?

If it is said that the gas used to adjust the pressure during coating is argon, I personally think that if only the pressure is adjusted, the primary pressure can be ignored, but the secondary pressure should be less than 0.5 atmospheres. Nitrogen is also the same, mainly because if it is too large, it will cause the pressure inside the vacuum chamber to change too dramatically, leading to errors. If an ion source is used, the argon gas inlet should not be too large, as it can lead to excessive ion content and damage to components. The pressure is no different from above.

Any solid material will dissolve and adsorb some gases in the atmospheric environment, and when the material is placed in a vacuum state, it will release gas due to desorption and desorption. The rate of gas release is directly proportional to the gas content in the material. The gas composition, temperature, and time required for analysis of different materials are different.

Various pumps have different pumping rates for gases of different compositions. When vacuuming, the first thing to be evacuated is the atmosphere in the container (this part of the gas is quickly evacuated, and the gas inside the furnace is basically exhausted at 10-1Pa), followed by the gas desorbed from the surface of the material, the gas diffused from the inside of the material to the surface, and the gas that penetrates into the vacuum through the wall Therefore, after the goods enter the furnace, insulation and degassing should be carried out because the goods will adsorb some impurity gases before entering the furnace. We need to use appropriate heating to allow these gases to desorb from the surface of the goods. Taking stainless steel as an example, in addition to the gases adsorbed on its surface, some gases will also precipitate inside the steel during the continuous heating and insulation process. The presence of these gases often has a significant impact on the purity and color of the film, as well as the adhesion of the film layer.

Therefore, during the coating process of a vacuum coating machine, the quality of the film layer and the gas play a crucial role, which is an indispensable step in the coating process.

Application description of vacuum coating:

1.Building hardware: bathroom hardware (such as faucets), door locks, door handles, bathroom fixtures, hardware hinges, furniture, etc.

2. Watch making industry: can be used for coating watch cases and straps, crystal products.

3. Other hardware: leather, plastic hardware, stainless steel tableware, eyeglass frames, knives, molds, etc

4. Large workpieces: car wheels, stainless steel plates, signs, sculptures, etc.

5. Stainless steel pipes and plates (various types of surfaces)

6. Furniture, lighting fixtures, hotel utensils.

7. Super hard decorative film for hardware products such as locks, handles, bathroom hardware, golf ball heads, stainless steel tableware, and utensils.

8. Watches, watch straps, glasses, jewelry and other decorative items are coated with super wear-resistant decorative (gold and silver) nano films and nano layered films.