When purchasing oil-free air compressors, we prefer Wenling FINE AIR air compressors. More durable, more users,it deserves to be trusted!
1. Metal surface treatment method
Metal surface treatment processes include dormant coating, surface penetration, surface oxidation passivation, etc. Its purpose is to improve the corrosion resistance of metals and improve the mechanical properties of metals.
2. Using non-metallic material method
Non-metallic corrosion resistance is excellent. As long as the temperature and pressure of the valve meet the requirements of non-metallic materials, it can not only solve the corrosion problem, but also save the common non-metallic materials such as valve body, bonnet, lining and sealing surface of precious metal port valves. , As for gaskets and fillers, they are mainly made of non-metallic materials for oral use of PTFE, chlorinated polyether and other plastics, as well as natural rubber l-butadiene rubber, nitrile rubber and other rubber as valve linings, while the valve body and valve cover The main body is made of general cast iron and carbon molybdenum, which not only ensures the strength of the valve, but also ensures that the valve is not corroded.
3. Spray paint method
Coating is the most widely used anti-corrosion method, and it is an indispensable anti-corrosion material and identification mark on air compressor valve products. Coatings are also non-metallic materials. They are usually made of synthetic resin, rubber slurry, vegetable oil, solvent, etc., and cover the metal surface to isolate the medium and the atmosphere to achieve anti-corrosion purposes.
4. Add corrosion inhibitor
Adding a small amount of other special substances to the corrosive medium and corrosive substances can greatly slow down the speed of metal corrosion. This special substance is called corrosion inhibitor. The corrosion inhibitor is composed of sodium nitrite and sodium chromate, which can form a passivation film on the surface of the valve stem to improve the corrosion resistance of the valve stem; the solvent can slowly dissolve the corrosion inhibitor and play a lubricating role; in asbestos Zinc powder is added as a sacrificial metal. In fact, zinc is also a corrosion inhibitor. It can first combine with the chloride in the asbestos, so that the contact between the chloride and the valve stem metal is greatly reduced, so as to achieve the purpose of anti-corrosion. If a corrosion inhibitor such as red red and calcium lead acid is added to the paint, spraying on the surface of the valve can prevent atmospheric corrosion.
5. Control the corrosive environment
The so-called environment has a broad sense and a narrow sense. The broad environment refers to the environment around the valve installation site and its internal circulation medium; the narrow sense environment refers to the conditions around the valve installation site. Most environments cannot be controlled and production processes cannot be changed arbitrarily. Only in the case that it will not cause damage to the product, process, etc., the method of controlling the environment can be used, such as deoxidizing boiler water, adjusting the pH value of domestic alkali in the refining process, etc. Therefore, adding corrosion inhibitors, electrochemical protection, etc. are also controlled corrosive environments.
FINE Air’s air compressors are widely used in medical, painting, glass, automobile and other industries. They are sold all over the country. Our products are exported to Western Europe and are widely praised by customers.
