Effect of phosphorus-free film agent

Effect of phosphorus-free film agent:

Phosphorus-containing wastewater discharged into rivers and lakes will cause an increase in phosphorus content in water. Phosphorus is one of the three major nutrient elements for plant growth, thus promoting the reproduction and growth of algae in water. After a large number of algae have died, they release the erosive stench and cause anoxia in the water, which will lead to water pollution and adversely affect the growth of aquatic organisms. Therefore, the emission of phosphorus is strictly limited by environmental protection.

The formation of precipitated phosphate combines with metal ions or produces chemical reactions to form insoluble or insoluble phosphate deposits. If it is not discharged in time, the phosphorous degreasing agent will easily block the nozzle when spraying, and the phosphorous coating agent (phosphating) will attach a large amount of sediment on the workpiece. If the cleaning is not complete, the treatment effect will be affected.

Features of phosphorus-free pretreatment process of phosphorus-free coating agent:

Realize non-phosphorus emission in the whole process. The traditional coating pretreatment process, due to the large amount of phosphorus in the degreasing agent and the phosphating solution, leads to phosphorus pollution in the wastewater due to the tank liquid being carried out with the workpiece. Although the non-phosphorus degreasing agent has been rapidly applied in recent years, reducing phosphorus pollution to a certain extent, but because the phosphating solution still contains a large amount of phosphorus, the problem of phosphorus pollution in the coating pretreatment process has not been well solved. The application of non-phosphorus degreasing agent and non-phosphorus coating agent has fundamentally solved the problem of phosphorus pollution in the pretreatment process of coating.