Poreseals India Limited

Offering a high quality of iron phosphate. For most operations that apply a conversion coating to steel workpieces, iron phosphating is the preferred approach because it is easier to control, less expensive, and generates less sludge than the zinc phosphate method. Iron phosphate yields a conversion coating that generally has less weight than that achieved with zinc phosphating, however, and thus the coating provides less corrosion resistance. Nonetheless, the quality of the deposition is sufficient to meet specifications for the majority of finished workpieces. Although iron phosphate can be used on most steel substrates, it is incompatible with galvanized steel, for which zinc phosphate is recommended. The iron phosphate process is essentially the pickling of steel in phosphoric acid. The surface of the steel is made up of numerous anode and cathode sites. The acid attacks the steel at the anodes, liberating iron ions into the bath and generating hydrogen gas.

Offering a high quality of manganese phosphate, which is widely used in the automotive industry are the best to improve the ease of sliding and the reduction of associated wear of two steel surfaces sliding one againist the other. The phosphate coatings possess intrinsic lubricating properties but can absorb a considerable quantity of lubricant by virtue of their porosity. This combination favours an easier running-in at higher surface pressures by forming a non-metallic barrier that seperates the two metal surfaces and reduces the danger of seizure and associated pitting. There is also less noise produced at such surfaces and they have an inbuilt capacity, in emergencies, to run dry for limited period.

Offering a high quality of phosphate coatings, which is used on steel parts for corrosion resistance, lubricity, or as a foundation for subsequent coatings or painting. It serves as a conversion coating in which a dilute solution of phosphoric acid and phosphate salts is applied via spraying or immersion, chemically reacts with the surface of the part being coated to form a layer of insoluble, crystalline phosphates. Phosphate conversion coatings can also be used on aluminium, zinc, cadmium, silver and tin.