With the application of mould pneumatic ball valve becoming more and more extensive, the requirements for the technicality of mould pneumatic ball valve fittings and the diversity of products are also becoming higher and higher. The corrosion of mould pneumatic ball valve can be divided into chemical corrosion and electrochemical corrosion according to the type of reaction. They are all the result of the change of metal atoms on the surface of the ball valve or the change of electron gain and loss into ionic state.
Chemical corrosion of mould pneumatic ball valve is small and slow, while electrochemical corrosion is main and common. But generally speaking, chemical corrosion and electrochemical corrosion exist at the same time.
The mould pneumatic ball valve is often corroded by the surrounding media in the process of manufacturing, storage and use. Since the mold pneumatic ball valve works by elastic force, the elastic force of the mold pneumatic ball valve will change and lose its function after being corroded. Therefore, preventing corrosion of the ball valve can ensure its stable operation and extend its service life.
The anti-corrosion method of mould pneumatic ball valve generally adopts protective layer, which can be divided into metal protective layer, chemical protective layer, non-metallic protective layer and temporary protective layer according to the nature of the protective layer. The first three methods are mainly introduced here.
Stainless steel ball valves and copper wire ball valves have certain anti-corrosion capacity, so generally no anti-corrosion treatment is carried out.