In recent years, cobalt coating has been known as an alternative material instead of chromium in corrosion
and erosion resistant behavior. Extensive research has been carried out on a variety of electroplated
cobalt coatings. In this study, for the first time, the relative priority of the cobalt coating has been calculated
and ranked theoretically by the Analytic Hierarchy Process (AHP). For this purpose, through the
AHP and the Expert Choice software, benefiting from expert opinions, the relative weights of the effective
parameters on achieving nanostructure coating have been calculated. Then, by using the weights obtained,
the relative priority of five available Co coatings was calculated and the quality of them was ranked.
Among available Co coatings, the coating with 5 mA/ current density, pH 3, electrolyte saccharin of
0.25 grams per liter and a temperature of 45 °C during 30 minutes, in comparing with others had more favorable
conditions for achieving nano-grain size. This shows that before experimental tests, the best alternatives
to achieve the ultimate goal could be anticipated. This anticipation leads to reduce in trial and error
and the multiplicity of the tests in investigations.
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