“…It has been suggested that the corrosion products from dezincification become trapped in these microcracks, preventing the transfer of the corrodant to the base steel. 17,21,22) It has also been proposed that the corrosion product that forms in zinc-nickel alloys is zinc hydroxide, Zn(OH)2, which in itself is effective in suppressing the oxygen reduction rate. 22) Thus, although zinc-l3 % nickel electrodeposited alloy initially has a simple, single-phase structure, the corrosion protection mechanism is complex, involving the reduced activity of the coating, the gradual change of the coating from sacrificial to barrier protection and secondary barrier protection provided by the corrosion product, possibly by entrapment within microcracks in the coating that form during corrosion.…”