%0 journal article
%@ 0013-4686
%A Yasakau, K.A.,Kallip, S.,Lisenkov, A.,Ferreira, M.G.S.,Zheludkevich, M.L.

%D 2016
%J Electrochimica Acta
%N 
%P 126-141 
%R doi:10.1016/j.electacta.2016.06.045
%T Initial stages of localized corrosion at cut-edges of adhesively bonded Zn and Zn-Al-Mg galvanized steel
%U https://doi.org/10.1016/j.electacta.2016.06.045
 
%X The mechanisms of the initial stages of localized corrosion at cut edges were investigated for adhesively bonded Zn (Z) and Zn-Al-Mg (ZM) galvanized steel. The results provided strong evidence for the localized nature of corrosion of galvanized coatings at the cut edges and at the adhesive/zinc interface. In both cases a defined localized corrosion attack on zinc in Z sample was observed. On the contrary, in the case of the ZM specimen both zinc solid solution and eutectics exhibited local corrosion. The local attack at the adhesive/Z(ZM) interface was correlated with an anodic undermining process. It develops near the cut-edge surface and at the buried deep adhesive-zinc interface and results in adhesive disbonding in the buried interface. The electrochemical studies revealed that the corrosion kinetics at the metal cut-edges decreases during immersion, which could be due to formation of corrosion products on both steel and zinc surfaces.