Abstract
The preparation conditions, structure, rate of deposition, and microhardness of electrochemical cobalt-molybdenum coatings from citrate electrolyte containing sodium salt of ethylene diamine tetraacetic acid (EDTA) at pH = 4 in the range of current density of 2–10 A/dm2 at room temperature are studied. It is shown that, under the investigated conditions, a falling dependence of the current efficiency on the current density and an increase of the Mo concentration in the coatings are observed with the current density increasing. Textured coatings and the increase of the molybdenum concentration at high current density lead to an increase of the microhardness of the coatings. The correlation between the molybdenum concentration in the coatings and their quasi-static and sclerometric microhardness is shown.
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