Energy saving crystalline phosphating

  • 1 Department of Innovative Materials and Corrosion Protection – Mendeleev University of Chemical Technology Moscow, Russian Federation


The object of the research was a low-temperature phosphating solution, in which the nitrate accelerator was replaced with a more environmentally friendly hydroxylamine. Research on the process of the low-temperature crystalline phosphating has been carried out, which allows to obtain fine-crystalline phosphate layers weighing 5.0-7.5 g/m2 with an increased protective ability up to 200 seconds, measured by the drop method using Akimov’s reagent. At different temperatures, phosphate coatings of various thicknesses are formed, which can be used to form anti-corrosive layers for oiling with a specific gravity of 7.5 g/m2 and adhesion layers for painting with a specific gravity of up to 5.0 g/m2, which corresponds to the recommendations for phosphating for ensuring good physical and mechanical properties and increasing the corrosion resistance of paint and varnish coatings.



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