composite exhaust valve in the process of work, if there is no corrosion protection measures, then it is easy to cause many problems, so compound exhaust valve how well corrosion resistance?

1。 The choice of materials is one of the important factors to prevent corrosion of valve. In general, cast steel Industrial Valves used for water, oil and gas. If there is acid and alkali corrosive medium, such as stainless steel should be chosen. General should be controlled under 200 ℃, the stainless steel in the medium will produce passivation membrane, prevent further corrosion. If strong corrosive medium, the use of high temperature, should choose of corrosion resistant alloy material. Medium for reducing, choose molybdenum stainless steel material; Medium for oxidizing, chromium stainless steel

2, surface coating of paint coating surface of the valve is also common methods for corrosion protection. Seal gate valves of the elastic base seat surface spraying epoxy resin paint is the processing method

3, lining materials isolated from the rest of the medium and the valve port, lining material containing lining engineering plastics, lining natural rubber and various synthetic rubber, etc. Normally only at low pressure and reduce the working temperature of use.

4, surface valve surface of chrome plating, nickel plating, copper plating can also be effective to achieve the effect of corrosion prevention and control.

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