Electrovalve products are prone to corrosion? You need to master these methods

There are many factors that affect the service life of solenoid valve products, and corrosion of solenoid valves is one of the important influencing factors. Extending the service life of solenoid valves, improving project safety, and anti-corrosion of solenoid valves are important considerations. How to effectively protect solenoid valve products, and what are the precautions in purchasing? You need to know the following methods.

Select corrosion-resistant materials based on the type of medium

In practical production applications, solenoid valves face a variety of media types, and even for the same medium, the corrosion rate of materials varies under different pressures, temperatures, and concentrations. For example, aluminum is highly corrosive in concentrated nitric acid with a concentration of over 80%, but its corrosion is not severe in medium to low concentrations of nitric acid. Carbon steel is most severely corroded in sulfuric acid with a concentration of 50%, and when the concentration reaches over 90%, the corrosion sharply decreases. So, when purchasing solenoid valve products, you can analyze the type of medium and the degree of corrosion of materials by different concentrations of media, or consult the manufacturer directly.

Select corrosion-resistant solenoid valves

Corrosion resistant solenoid valves are solutions specifically designed for corrosive media. Many corrosion-resistant solenoid valves use non-metallic materials as the contact surface between the solenoid valve cavity and the media. Materials such as natural rubber and polytetrafluoroethylene not only have good corrosion resistance, but also play a role in saving precious metals as long as the pressure and temperature of the project environment meet the characteristics of the materials.

Surface treatment of solenoid valve

The surface treatment of solenoid valves can be divided into thermal spraying and spray coating. Thermal spraying is one of the techniques for adding a protective layer to the surface of equipment. Thermal spraying is the use of high energy density heat sources, such as gas combustion flames, electric arcs, plasma arcs, electric heating, gas explosions, etc., to heat and melt metal or non-metal materials, and then spray them onto the pre treated basic surface in the form of atomization to form a spray coating. Thermal spraying can improve the corrosion resistance, wear resistance, high temperature resistance and other characteristics of the surface of solenoid valves, extending the service life of products.

Spray coating is a common method, which belongs to non-metallic materials. When applied to metal surfaces or cavities, it can effectively isolate the medium and atmosphere, achieving the purpose of corrosion prevention.

Control corrosive environment

Controlling the corrosive environment is mainly aimed at the working environment where the solenoid valve is located, such as effectively controlling dust, water vapor, smoke, and toxic gases in the environment to maintain cleanliness and dryness.