Oxidation layers formed on iron in deaerated bicarbonate/carbonate solution
s at potentials in the active range were investigated through electrochemic
al techniques, FTIR and scanning electron microscopy. Three oxidation produ
cts have been obtained, siderite, am-FeOOH with adsorbed carbonate or bicar
bonate ions and green rust GR1(CO3). It has been shown that the formation o
f either compound was strongly dependent on the concentration, temperature
and pH of solutions. (C) 2000 Elsevier Science Ltd. All rights reserved.