Correct interpretation of the selection of anti-corrosion coatings for level measuring instruments

Level measurement sounds abstract, but in fact it is widely used. The electromagnetic pulse of the material level propagates along the steel cable or probe at the speed of light. When it encounters the surface of the measured medium, part of the pulse of the material level is reflected to form an echo. And return to the pulse transmitting device along the same path. The distance between the transmitting device and the surface of the measured medium is proportional to the propagation time of the pulse in between. After calculation, the level height is obtained. The level measuring instrument is widely used in modern industrial production. It plays an important role in the production process, improving production efficiency and product quality, and reducing production costs. As a common phenomenon in modern industrial production, corrosion phenomenon seriously affects the service life of the instrument and the reliability of measurement. In order to ensure the anti-corrosion effect and the normal use of the instrument, it is a common practice to spray anti-corrosion coating on the instrument. However, due to different working conditions, there are different requirements for anti-corrosion coatings. This paper specifically discusses the selection of anti-corrosion coatings for lower level measuring instruments. When choosing an anti-corrosion coating, the anti-corrosion coating of the level measuring instrument should be selected according to different on-site environmental requirements. Special attention should be paid to the following points. First, see whether it is necessary to add an anti-corrosion coating and the thickness of the added anti-corrosion coating. Different instrument application environments have different requirements for whether to add anti-corrosion coating and the thickness of the coating. Therefore, first of all, it is necessary to confirm whether the medium measured by the instrument is a strong acid, a strong alkali medium, or other corrosive organic solvents, and whether to add an anti-corrosion coating and its thickness is determined according to the characteristics of different media. In addition to the characteristics of the medium itself, the pressure and temperature of the tank also have a great influence on the corrosiveness. Generally, as the temperature increases, the rate of corrosion also increases. Likewise, as the pressure increases, so does the corrosivity. Therefore, it is necessary to find out how much Mpa pressure the tank is, whether it is positive pressure or negative pressure, and what the measured temperature is. Secondly, see if the adhesion of the anti-corrosion coating is strong enough. The stronger the adhesion of the anti-corrosion coating, the more durable the coating, and the better its corrosion resistance. Therefore, when choosing anti-corrosion coatings, be sure to choose anti-corrosion coatings with strong adhesion. Again, see if the anti-corrosion coating has strong stability and anti-aging ability. If the anti-aging performance of the anti-corrosion coating is poor and the stability is not strong, it will directly affect the effect of anti-corrosion. Therefore, the anti-corrosion coating should have good anti-aging properties, and be able to maintain stable properties in low temperature, high temperature, water, and chemical reagents. Finally, see whether the anti-corrosion coating has a certain mechanical strength and whether it has considerable adaptability to external stress. The conventional mechanical properties of anti-corrosion coatings include hardness, flexibility, impact resistance, wear resistance and other characteristics. The mechanical strength and external stress of the coating have an important impact on the anti-corrosion properties. Therefore, attention should be paid to the mechanical strength and external stress of the anti-corrosion coating when selecting, and an anti-corrosion coating with a certain mechanical strength and considerable adaptability to external stress should be selected. Common level measuring instruments, such as magnetic flap level gauge, quartz tube level gauge, radar level gauge, etc., are often used to detect various types of corrosive media due to their wide application. The parts of the level measuring instrument that are in contact with the measured medium, especially the liquid medium, are very easy to corrode. Summary: Different on-site demand points are different, some manufacturers need anti-corrosion, some do not need anti-corrosion, so when choosing, it must be selected according to the working conditions. The correct choice of the level anti-corrosion coating can effectively improve the service life of the level measurement.

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