Preliminary investigations on anodic oxidation of galvanic Zn-Ni coatings and corrosion characterisation of formed oxide coatings

摘要

Results ofinvestigations applying to anodic oxidation of zinc - nickel alloy coatings electrodeposited on steel substrate have been showed in this work. The process was carried out in the baths which are sodium hydroxide of various concentration in the range of 0.25-1.25 mol/dm . On the basis of the realized investigations, it was found that the anodic treatment of Zn-Ni galvanic alloy leads to cracks formation on the creating oxide layer. In spite of the cracks presence, the corrosion resistance of the Zn-Ni alloy coatings have been observed.