Abstract
UDC 541.135 + 546-3
A research tracking an electrochemical activity of the fractions of boron-gluconate electrolyte, used to manufacture nanocrystalline Co-W coatings (the difference between molecular masses of the electrolyte compounds was used for separation) revealed that only the fractions with a high molecular weight result in electrodeposition with traces of a tungsten concentration of ~ 1% at. In case when low molecular mass fractions, containing chloride-, boron-gluconic-tungsten ions with traces of cobalt were used, electrodeposition was not observed. As shown in the study, the obtained results can be correctly described by the Podlaha-Landolt model of the induced co-deposition of iron-group metals.
Keywords: electrodeposition, induced co-deposition, Co-W coatings, boron-gluconate electrolyte, gel-chroma-tography, gel-filtration.