Summary:It is well known that corrosion damage to metals has a considerable impact on valve effectiveness, reliability and servi...
It is well known that corrosion damage to metals has a considerable impact on valve effectiveness, reliability and service life. The effect of mechanical and corrosive factors on the metal greatly increases the total amount of wear on the touch surface. The total wear of the friction surface during the operation of the valve. During valve operation, the frictional surface is worn and damaged as a result of simultaneous mechanical effects and chemical or electrochemical interactions between the metal and the environment. For valves, the climatic conditions of their pipelines are complex; the presence of hydrogen sulfide, carbon dioxide and some organic acids in media such as oil, natural gas and oil reservoir water increases the damage to the metal surface, thereby rapidly losing workability.
Valve corrosion is usually understood as the damage to valve metal materials under chemical or electrochemical environmental effects. Because the corrosion phenomenon appears in the spontaneous interaction between the metal and the surrounding environment, how to block the metal from the surrounding environment or use more non-metallic composition materials has become a common concern of people.
Because the chemical corrosion of metal depends on the temperature, the mechanical load of the friction parts, the sulfide contained in the lubricating material and its stability against acid and the duration of contact with the medium and the catalytic effect of the metal on the nitriding process, corrosion and corrosiveness The rate of conversion of molecules of matter to metals, etc. Therefore, the anti-corrosion methods (or measures) of metal valves and the application of valve components have become one of the topics of current valve industry research.
The anti-corrosion of metal valves can be understood as coating the metal valve with a protective layer (such as paint, pigment, smooth material, etc.) to protect it from corrosion, so that the valve is made, stored, transported or used. No corrosion during the whole process. The method of anti-corrosion of metal valves depends on the required maintenance period, transportation and storage conditions, valve structure characteristics and materials. Of course, it is customary to consider the economic effect of eliminating anti-corrosion.
There are four main methods for anti-corrosion of metal valves and their parts:
1. Put the volatile corrosion inhibitor into the steam atmosphere (wrapped with anti-chemical paper, blow the inhibited air through the product chamber, etc.).
2. Use blocked water and alcohol solutions.
3. Apply a thin layer of anti-corrosion (protection) material to the surface of the valve and its parts.
4. Coat the blocked film or polymer thin layer on the surface of the valve and its parts.Ningbo Baodi Plastic Valve Co., Ltd. is professional China Pipe Fitting Accessories Manufacturers and Pipe Fitting Accessories suppliers.Founded in 2006, the enterprise has established ISO9001 quality system to support the quality guideline: supported by Technology, Meticulously Researching, Professionally Manufacturing and Permanently Creating New Records. The first class production equipments and advanced manufacturing skills are introduced at the same time, involving KRAUSS-MAFFEL CPVC pipe production line and Haitian CPVC Plastic Molding Machine of 2800 tons.