1, the corrosion of the valve, is generally understood as the valve metal materials in the chemical or electrochemical environment under the action of the damage. Due to the corrosion phenomena appeared in the metal and the surrounding environment of spontaneous interaction, therefore, how to the metal with the surrounding environment or more isolated from the use of non-metallic composite material, which become the common concern. 2, as we all know, the effect of metal corrosion damage to the valve, reliability and service life have a considerable influence. The role of mechanical and corrosion factors effect is greatly increased the contact surface of metal general wear. Valves in the process of operation, the friction surface of the total amount. Valves in the process of operation, because of the friction surface at the same time, the role of the mechanical and metal chemical or electrochemical interactions with the environment the result of wear and tear. In terms of the valve, the pipeline work climate conditions of complex; Oil, gas and oil reservoir water medium such as hydrogen sulfide, carbon dioxide, and the emergence of some organic acids increased its destructive power on the surface of the metal, thus losing the ability to work quickly. 3, because the chemical corrosion of metals depends on temperature, the friction parts of mechanical load, lubrication material contains sulfur and its stability of acid and the duration of the medium contact and metal catalysis of nitriding process, erosion corrosion substance molecules on metal conversion speed and so on. As a result, the metal valve anti-corrosion methods ( Or measures) And the application of synthetic material valve, valve industry has become the one of the research topic. 4, metal anti-corrosion, valve can be understood as a coating on metal valve protection is not subject to the conditions of the corrosion protection layer ( Such as paint, paint, lubricating material, etc. ) , that, whether the valve in the manufacture, storage, transportation or on the whole process of its use is not affected by corrosion. 5, metal valve anti-corrosion methods depends on the demand of protection period, transportation and storage condition, the characteristics of the valve structure and material, of course, adapt to consider the economic effect of the lifting anticorrosion. Metal valve and its components anticorrosive method mainly has four kinds: 1, the volatile corrosion inhibitor in the vapor in the atmosphere ( With the inhibitor paper packages, blowing inhibition of air chamber by products, etc. ) 。 2, the use of the inhibitor for water and alcohol solution. 3, will be corrosion, Protection) Apply to the Industrial Valves and parts surface thin layer material. 4, will be the inhibitor film or thin layer of polymer on the valve and parts surface.
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