In modern industry, automatic butterfly valves are key fluid control components, and their performance directly affects the safety and economy of the system. Therefore, material selection and optimization, surface treatment technology and anti-corrosion measures are particularly important.
Material selection and optimization
As an important base material for automatic butterfly valves, stainless steel is widely used in core components such as valve bodies and valve discs due to its excellent corrosion resistance. In particular, duplex stainless steel combines the advantages of austenitic and ferritic stainless steels, showing higher strength and superior resistance to chloride stress corrosion cracking, making it an ideal choice for high-demand environments.
In terms of material diversification, the introduction of non-metallic materials cannot be ignored. Plastics such as polytetrafluoroethylene and chlorinated polyether, as well as rubber materials such as natural rubber, chloroprene rubber and nitrile rubber, can all be used to manufacture valve seats and sealing rings. These non-metallic materials not only have excellent corrosion resistance, but also provide excellent sealing effects, especially for working conditions containing granular media.
Surface treatment technology
In order to further improve the durability of automatic butterfly valves, the application of surface treatment technology is essential. Ceramic coating spraying technology, as an advanced surface treatment method, can provide a dense protective layer for key components such as valve discs. This coating is based on epoxy phenolic resin and added with nano-scale composite ceramic particles. The coating formed is not only resistant to high temperature and corrosion, but also can effectively prevent direct contact between seawater and metal materials, preventing pitting corrosion.
Thermal spraying technology also plays an important role in the field of valve surface treatment. Through a high-energy density heat source, the metal or non-metallic material is melted and sprayed onto the valve surface to form a corrosion-resistant, wear-resistant and high-temperature resistant spray coating or spray welding layer, which significantly extends the service life of the valve.
Application of anti-corrosion coatings and corrosion inhibitors
In terms of anti-corrosion measures, the use of special anti-corrosion coatings such as epoxy resin coatings and polyurea coatings can further enhance the corrosion resistance of valves. These coatings not only improve the anti-corrosion ability of the valve, but also enhance its appearance and durability.
In addition, by adding corrosion inhibitors to the corrosive medium, the corrosion rate of the metal can be effectively slowed down. Corrosion inhibitors control the corrosion process by promoting the polarization of batteries. Especially in specific application scenarios such as valve pressure testing, the use of corrosion inhibitors can effectively prevent water from corroding the valve and ensure the long-term stable operation of the valve.
Electrochemical protection technology
As an effective means to prevent metal corrosion, electrochemical protection is also indispensable in the anti-corrosion treatment of automatic butterfly valves. Anodic protection forms a passivation film on the surface of the protected metal by applying an anodic current, thereby preventing corrosion; while cathodic protection further enhances the metal's corrosion resistance by applying a cathodic current. These two electrochemical protection methods complement each other and provide a full range of anti-corrosion solutions for automatic butterfly valves.
Skype : lmzhbb