Industrial Valves corrosion is the problems often encountered in use, as well as the material in chemical or chemical performance of environment destruction. It is because of the valve corrosion is caused by the spontaneous interaction between metal and the environment, so to achieve the ideal valve anti-corrosion effect, should from the two aspects. One is the valve from the surrounding environment; The second is to use non-metallic products. Due to the proportion of the body weight of the Industrial Valves, the Industrial Valves body corrosion is the root cause of the overall corrosion of the valve. Body there are two major types of corrosion, is a kind of chemical corrosion, the other is the electrochemical corrosion. Corrosion rate depends not only on the temperature and pressure of the corrosive medium, chemical properties and other objective factors, but also on the corrosion resistance of the body itself. The corrosion rate of different materials of the body is divided into totally corrosion resistance, corrosion resistance, corrosion resistance, corrosion resistance, corrosion resistance is poor. Six levels of corrosion resistance. Therefore, in order to effectively avoid the corrosion of the valve, it is necessary to isolation valve body and the environment, choose the body, not of metal. At present, the body corrosion method and experience of many, but is not easy to select the correct method. The main reason is that the cause of the corrosion is very complicated. Low concentration of sulfuric acid, for example, can produce a strong to steel corrosion, so can only produce high sulfate concentration passivation membrane, so as to achieve the aim of anti-corrosion; In high temperature or humidity environment, the hydrogen can produce serious corrosion of steel, but in a relatively dry environment, hydrogen corrosion resistance is very weak, even if choose nonmetal material, it is hard to solve the corrosion problem. The design of the body also is very difficult, because it should not only consider the anticorrosive problem, also consider factors such as resistance to pressure and temperature of the body material, applicability and economy, difficulty of purchase and other factors. Therefore, when choosing antiseptic valve body materials, must pay special attention to.

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