WET CO2 CORROSION
Definition
<WET CO2 CORROSION> is <CORROSION> due to a reaction of carbon dioxide with water: CO2 + H2O --> HCO3- + H+ ; As the concentration of CO2 increases, so does the concentration of the H+ ion. This ion then reacts with Fe in metals: Fe + 2H+ --> 2H (atom) + Fe2+ As corrosion proceeds, the ferrous ions produced react with the bicarbonate ions to form ferrous carbonate which precipitated as a scale