Analysis of the Corrosion of Dosing Metering Pump

There are many reasons why the dosing pump is corroded, but the main reason is that it is affected by the cavitation, influenced by the material, influenced by the medium and influenced by the load. Therefore, for these reasons Analysis is very necessary. The following Xiaobian to introduce the dosing metering pump was corroded analysis. 1, the impact of cavitation Cavitation generally appear in the pressure changes in large and high-speed liquid flow on the metal surface. Dosing metering pump in normal operation, when inhaled, the negative pressure will be formed along the axial direction of the media inhalation, and when the pressure is too low will form bubbles to produce such as "water hammer" phenomenon, which will make Metal surface damage received, and these exposed in the metal surface of foreign trade will be further corrosion of the medium, and re-formed protective film. This process will continue, and finally to the formation of pits, further corrosion of dosing pumps. 2, affected by the material selection in the selection of materials can not meet the needs of the working conditions, dosing metering pumps commonly used cast iron material, and the low strength of cast iron and corrosion resistance is poor. General medium will have a weak acid, the use of time is too long, then it will slowly corrode the internal parts of the pump, this is very dangerous, because the pump dimensions will not be significantly changed, while the pump internal parts strength and performance are This is the reason that dosing pumps are corroded. 3, the media affected by the need to die of the medium has a very strong corrosive, dosing pump operation, pump housing within the high-speed flow of medium ring, the surface passivation film was broken, the corrosion products were quickly removed , Resulting in a new passivation film, was quickly removed, go back and forth, the pump shell impact wear and tear. And because the fluid impinges directly on the metal surface of the pump housing, this can result in more serious losses than other components, causing the pump housing to be as thin as paper. 4, the impact of loading dosing metering pump system load is very serious, long-term in this state will make the dosing metering pump will be more media erosion will intensify and accelerate the dosing metering pump damage the speed and shorten the use of the pump life. The above is the dosing metering pump by cavitation, affected by the material, affected by the media, affected by the load of these four aspects of the reasons analysis, through these analyzes, I hope follow-up to find more ways to prevent dosing Metering pump is corroded. Further reading: IFAT China Guangzhou exhibition industry leaders building water pump manufacturers ranking article belongs to Internet industry (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: lindj (QQ / WeChat:) Starting: http://beng.liuti.cn/ (Service Hotline:)