Corrosion resistance of electrodeposited Ni-Al composite coatings on the aluminum substrate

► Nickel coating with Al particles was successfully deposited on aluminum alloy (7072) via sediment co-deposition. ► Maximum Al particles content in coating was 22 wt.%. ► Zincate coating had a distinct effect on adhesion of nickel coating. ► Al metal particles shifted polarization curves to negative potentials and corrosion rate is decreased. ► Deposition of Al particles could be explained by the Guglielmi's model for inert particles.