treating chromium (iii) - containing and fluoridhaltiges passivierungsbad concentrate on surfaces of zinc, zinc and cadmium

摘要

a treating chromium (iii) - containing and fluoridhaltiges passivierungsbad for surface of zinc, zinc and cadmium contains one or more komplexverbindung (s) of formula (1): [cr (h2o) 6 - nfx] (3 - x) + a (x = 1 to 3 and a = nitrate, sulfate phosphate, chloride, bromide, iodide), fluoride and owie more than chromium (iii) - concentration of a soluble nitrate.preferably, it contains additional a acid with cr3 + loaded ion exchangers and / or a means of unlu00f6chlichmachen fe3 + - ions.