Pneumatic valve body of anti-corrosion materials

corrosion of pneumatic valve, pneumatic valve is often understood as metal materials in the chemical or electrochemical environment under the action of the damage. As a result of 'corrosion' phenomena appeared in the metal and the surrounding environment of spontaneous interaction, how the metal with the surrounding environment or more isolated from the use of non-metallic composite material, is the key point of anti-corrosion. Pneumatic valve pneumatic valve body (
Including pneumatic valve cover, occupy most of the weight of the pneumatic valve, again is in frequent contacts with the media, so choose pneumatic valves often start from pneumatic valve body material.
pneumatic valve body corrosion, comes in two forms, namely, chemical corrosion and electrochemical corrosion. The corrosion rate of it depends on the medium temperature, pressure, chemical properties and corrosion resistance of pneumatic valve body material. Corrosion rate can be divided into six: such as, completely corrosion resistant: corrosion rate below. Mm/year, corrosion resistant, corrosion speed. To. Mm/year, corrosion resistant, corrosion rate. To. Mm/year, is corrosion resistant, corrosion speed. To. Mm/year, poor corrosion resistance: corrosion speed. To mm/year, corrosion resistant, corrosion rate is greater than the mm/year
pneumatic valve anti-corrosion, main is correct to choose material. Although anticorrosion materials is very rich, but can choose appropriate, or not easy thing, because the problem of corrosion is very complex, such as sulfuric acid at low concentration has very big corrosive to steel, high concentration, make steel passivation membrane, corrosion resistance; To show only under high temperature and high pressure hydrogen corrosion of steel is very strong, chlorine gas in the dry state when corrosion is not large, with a certain humidity, strong corrosion performance of many materials can't use. Choose pneumatic valve body material difficulty, is not only considered corrosion problem, the pressure must be considered and heat-resistant ability at the same time, the economically reasonable, whether the purchase easy and other factors. So you have to is in the heart.