An evaluation of the corrosion resistance and adhesion properties of an epoxy-nanocomposite on a hot-dip galvanized steel (HDG) treated by different kinds of conversion coatings

► Adhesion properties of an epoxy nanocomposite on the pre-treated HDGs were studied. ► Decrease in contact angle and increase in Ra were obtained on the pretreated HDGs. ► The dry adhesion strength was improved on the pre-treated samples. ► Increase in adhesion was more pronounced on Cr(III)-Co(II) and Ni(II) pretreated CCs. ► The corrosion resistance of epoxy coating was improved on the pretreated HDG.