Effect of carbon dioxide on the atmospheric corrosion of Zn–Mg–Al coated steel.

Highlights: [•] ZnMgAl material was significantly more affected than GI, and in the range of the Galfan coating. [•] An obvious pH effect was underlined in low CO2 conditions. [•] Layered double hydroxide and simonkolleite were mainly formed on ZnMgAl coating in the absence of CO2. [•] Hydroxycarbonate and simonkolleite were dominating in ambient air, as for GI. [ABSTRACT FROM AUTHOR]