The main reason for the sewage pumps corroded

pump corrosion reasons, the cause of the sewage pump corrosion

as a result of the water pump corrosion phenomenon seriously endangering the development of the industry, thus have long attracted attention, such as MCRoco within the pump system in a closed surface coating method is used to determine the wear of water pump chamber will be corrosion pump to appropriate answer the impact of solid particles, solid particle turbulent impact and through the side wall of the sliding friction; Tsinghua university took closed pump system using high-speed photography in the trajectories of particles in the impeller, pump room and concentration distribution, and in-depth and detailed theoretical analysis and research, put forward the two phase flow velocity of solid particles pump design theory. Now, the water water pump corrosion technology is still the cause of our country and the world is facing a very serious problem, involving various sectors of the national economy, must intensify efforts to research and solve this problem.

due to the most current sewage pump products are produced by metal materials, metal corrosion mechanism of the corrosion is an electrochemical phenomena. Experimental research shows that the metal corrosion in the mix sand water slurry was much more serious than preserved in the water erosion. Internal corrosion is caused by slurry sewage pump, the solid particles in slurry can accelerate the flow components of pump corrosion rate, but also increase the wear.

below is stainless steel submersible sewage pump:

in clean water, iron oxidizing reaction, release the electrons, the formation of anode

Fe = Fe2 + + 2 e & macr;

at the same time, the clean water oxygen to produce REDOX reaction, the formation of cathode

4 Oz + e - +2H2o=40H¯

water contains hydrogen ions, belongs to the acid solution, the oxygen reduction reaction, formation of cathode

2 h + + 2 e & macr; = H

the interaction between anode and cathode products produced corrosion products, the final products for the iron hydroxide, ferroferric oxide or ferric oxide. The fish in clean water, the reaction products formed a stop oxygen to the cathode diffusion layer, thereby reducing the rate of corrosion. But in solid water mixture, the protective layer will be damaged by the solid particles in the water, will also be damaged by the oxide and sulfide in the water particles, this is the sewage pump than the centrifugal pump of the main causes of serious corrosion.

this sewage pump corrosion reasons pump technology news articles by professional pump original.

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