Abstract
This paper present the results of electrolytic nickel composite coatings manufacture. The process was conducted in Watts-type solutions with the addition of finely dispersed hard ceramic particles of alumina (Al2O3) in concentrations of 50 and 100 g/l. The coatings were produced on aluminum alloys 2xxx and 5xxx series. Morphology, structure and microhardness of the obtained composite coatings were examined. The corrosion resistance of coatings was investigated in the neutral salt spray test (NSS) and by electrochemical methods. The results of Taber abrasion resistance test were also given. Based on the overall results of studies, a varying effect of nickel sulfate and Al2O3 concentration in bath on the properties of composite coatings deposited on aluminum alloys was stated.
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