Features of zinc passivation by sodium dodecylphosphontate in a neutral aqueous solution

Abstract The features of the adsorption and passivating effect of sodium dodecylphosphonate (C12PNa2) on zinc, as well as the effect of electrode potential and presence of a surface oxide on them were studied. The possibility of zinc adsorption passivation by C12PNa2 with formation of nanolayers that inhibit zinc corrosion in a chloride-containing neutral solution and in a humid atmosphere was shown. The adsorption properties of C12PNa2 are most pronounced on an oxide-free zinc surface. The composition of the layers formed by C12PNa2 depends on the initial state of the surface and determines their protective ability.