Vacuum pump is widely used in medical and pharmaceutical, semiconductor, mechanical and chemical engineering, low-temperature equipment, electronics, metallurgy, oil and mining and other fields, and its related technology has also been developed by leaps and bounds. In the application process of vacuum pump, due to the different production process, the vacuum pump will suffer from different degrees of corrosion. If the protective measures are improper, the vacuum pump will be stopped due to corrosion. Therefore, the anti-corrosion of vacuum pump is an urgent practical problem to be solved to prolong the service life of vacuum pump.

Since 2007, the number of vacuum pump related patent applications in the world began to accelerate growth. China and Japan are the main acceptance countries of vacuum pump anti-corrosion related patents. However, domestic patent rights have not formed obvious technical competitive advantages, and the patent protection area is limited, and few of them have applied for protection abroad.

Three anticorrosion technologies of vacuum pump

At present, the domestic anti-corrosion technology of vacuum pump is mainly aimed at roots vacuum pump, water ring vacuum pump, steam vacuum pump, liquid ring vacuum pump, diaphragm vacuum pump, turbine molecular pump, etc

1、 Through coating a layer of anti-corrosion coating on the surface of vacuum pump, such as chlorotrifluoroethylene coating, Teflon coating, corrosion-resistant oxidation layer or nitriding layer, corrosion-resistant and weather resistant paint, etc;

2、 For the improvement of anti-corrosion materials, the commonly used coating materials include stainless steel, tin bronze, cemented carbide and other metal materials, non-metallic materials such as natural rubber, phosphorus sheet, synthetic rubber, ceramics and plastics, and new materials such as precision ceramics, organic polymers or heat-resistant, corrosion-resistant and wear-resistant polymer materials, among which the polymer materials include fluoroplastics, polyethylene, polyvinyl chloride, etc;

3、 For example, the upper part of the pump body is equipped with an air chamber and a top mounted corrosion-resistant gas-water separator.

Although domestic enterprises invest less in dry screw vacuum pump, because it can be used in pure vacuum process, high vacuum degree, adapt to harsh working conditions, can extract condensable and particulate gas, and is easy to do anti-corrosion treatment. Zhejiang kelexi Power Equipment Co., Ltd. has invested a lot of manpower and material resources in the field of screw vacuum pump, and its core screw rotor technology not only makes single-stage vacuum pump It has broken through the limit vacuum of 0.1 Pa. in terms of anti-corrosion technology, multi-layer nickel plating and nanotechnology can make the vacuum pump easily cope with high corrosive medium environment such as hydrochloric acid, and is in the leading position in the world.