The so-called corrosiveness of chemicals means that chemicals such as Polyferric Sulfate, ferrous sulfate, and hydrochloric acid will corrode their equipment, pipelines, and related equipment, water pumps and other containers to a certain extent during the process of wastewater treatment. The service life of such equipment is reduced, and the failure rate and maintenance cost of equipment use are increased. Finally, the corrosiveness of Polyferric Sulfate increases the reconstruction cost of the equipment.
Polymeric ferric sulfate is an acidic polymer, and the acidic substance in the solution can electrically generate hydrogen ions. The stronger the acidity, the stronger the solubility of various metal substances. The residual metal ions in the molten iron sulphate and the Fe element form a primary battery, and the relatively low pH value and the protective film on the surface of each metal have a dissolution reaction, which accelerates the corrosion of the cast iron.
Although polyferric sulfate is a weakly acidic substance, and the improved polyferric sulfate does not contain Cl- (when the temperature is lower than 50 °C and the Cl- concentration is greater than 5000 mg/L, or the temperature is higher than 80 °C, the Cl- concentration is greater than At 500mg/L, titanium steel must be used to prevent corrosion), which greatly reduces the corrosiveness of equipment, pipelines and structures, but still has a certain degree of corrosiveness, mainly in some iron-iron containers.
The enhanced polyferric sulfate has a strong adsorption and electric neutralization effect, which can effectively adsorb most of the metal ions in the co-precipitated water body, and there is no residual iron ion in the water, and it does not contain Cl-, which greatly prolongs the cast iron material. The service life of the water pipeline is 1/5 of the corrosiveness of ordinary polyferric sulfate. It is almost non-corrosive to steel materials with a short reaction time.
With the improvement of polyferric sulfate, its corrosiveness is getting smaller and smaller. At the same time, we are also using the application of corrosion-resistant materials, so that polyferric sulfate can completely get rid of the concerns about the corrosiveness of equipment and pipelines.
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