How are metal valves anticorrosive
Date:2021-03-13 Click:1506
Leto introduces several corrosion prevention methods for metal valves.
In production practice, the corrosion of the medium is very complex, even if the valve material used in the medium is thick
Degree, temperature, pressure is different, the medium is not the same to the material corrosion. The corrosion rate increases about 1~3 for every 10°C increase of medium temperature
Times. Therefore, the correct selection of valve [] material should be based on the specific situation, analysis of various factors affecting corrosion, according to the relevant anti-corrosion manual selection of materials
Material.
Coating in valve products is an indispensable anticorrosive material. The coating covers the metal surface to isolate the medium and the atmosphere,
Achieve the purpose of anti-corrosion. The valve cavity is commonly used anticorrosive paint to prevent water, air and other media corrosion of the valve.
Adding a small amount of other special substances to the corrosive medium and corrosive material can greatly slow down the speed of metal corrosion, which is special
Substances are called corrosion inhibitors. Corrosion inhibitors control the corrosion by promoting the polarization of the battery. Corrosion inhibitors are mainly used in media and fillers
Place. The corrosion of equipment and valves can be slowed down by adding corrosion inhibitor to the medium.
Thermal spraying is a kind of technology block for preparing coating, which has become one of the new technology for material surface protection. Thermal spraying can improve the surface
Surface corrosion resistance, wear resistance, high temperature resistance and other properties, prolong service life. Thermal sprayed special functional coating for heat insulation, insulation (or
Different electric), grinding sealing, self-lubrication, thermal radiation, electromagnetic shielding and other special performance; Parts can be repaired by thermal spraying.
5, control the corrosive environment
The so-called environment, there are two kinds of broad sense and narrow sense, the broad sense of the environment refers to the valve installation place around the environment and its internal circulation medium: narrowThe meaning of the environment refers to the valve installation conditions around. Most environments cannot be controlled and the production process cannot be changed arbitrarily. Only in the
Environmental control methods, such as boiler water deoxygenation and oil refining process, can be used if there is no damage to products and processes
The alkaloid adjusts pH value and so on.
