1. The corrosion of the valve is usually understood as the damage to the metal material of the valve under the chemical or electrochemical environmental effect. Because the corrosion phenomenon is presented in the spontaneous interaction between the metal and the surrounding environment, how to isolate the metal from the surrounding environment or use more non-metallic composition materials has become a common problem.
2. As we all know, the corrosion damage of metal has a considerable impact on the effect period, reliability and service life of the valve. The effect of mechanical and corrosive factors on the metal greatly increases the total wear of the contact surface. The total amount of wear and tear on the surface of the valve during operation. During the operation of the valve, the conflicting appearance is worn and damaged due to the simultaneous mechanical effect and the chemical or electrochemical interaction between the metal and the environment. For valves, the working climatic conditions of the pipeline are complex; The presence of hydrogen sulfide, carbon dioxide and certain organic acids in media such as oil, natural gas and oil layer water increases the destructive power of the metal surface, and then quickly loses its ability to work.
3. Because the chemical corrosion of the metal depends on the temperature, the mechanical load of the friction parts, the sulfide contained in the smooth material and its acid-resistant stability, the continuous moment of contact with the medium and the catalytic effect of the metal on the nitriding process, the conversion rate of the molecules of corrosive corrosive substances to the metal, etc. Therefore, the application of anti-corrosion methods (or methods) of metal valves and the composition of data valves has become one of the topics of the current valve industry discussion.
4. The anti-corrosion of metal valves can be understood as coating and maintaining the condition maintenance layer (such as paint, pigment, smooth data, etc.) on the metal valve to protect it from corrosion, so that the valve is not corroded in the whole process of manufacturing, preservation, transportation or its application.
5. The method of anti-corrosion of metal valves is determined by the required maintenance period, transportation and storage conditions, valve structure characteristics and data, of course, to adapt to the economic effect of lifting anti-corrosion.
There are four main ways to prevent corrosion of metal valves and their parts:
1. Put the volatile corrosive press agent into the atmosphere of steam (wrapped with chemical barrier paper, blow the press air through the product chamber, etc.).
2. Use the blocked water and alcohol solution.
3. Apply a thin layer of anti-corrosion (maintenance) data to the surface of the valve and its parts.
4. Apply a thin layer of film or polymer to the surface of the valve and its parts.
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