Electrochemical formation of carbonated corrosion products on carbon steel in deaerated solutions

► Green rust is electro-generated at low NaHCO3 concentration (0.003 mol dm−3). ► Chukanovite and carbonated green rust are obtained in NaHCO3 + Na2SO4 deaerated electrolytes. ► The mechanisms of formation of carbonated corrosion products of carbon steel are specified.