InterviewSolution
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How Can Wet Carbon Dioxide Be Responsible For A Corrosion Problem In Iron-containing Metals? |
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Answer» Carbon dioxide REACTS with water according to the following equation: CO2 + H2O --> HCO3- + H+ As the concentration of CO2 increases, so does the concentration of the H+ ion. This ion can then react with Fe in metals as follows: Fe + 2H+ --> 2H (atom) + Fe2+ As corrosion proceeds, the ferrous ions PRODUCED can react with the bicarbonate ions to form ferrous carbonate, which precipitates as a SCALE. Carbon dioxide reacts with water according to the following equation: CO2 + H2O --> HCO3- + H+ As the concentration of CO2 increases, so does the concentration of the H+ ion. This ion can then react with Fe in metals as follows: Fe + 2H+ --> 2H (atom) + Fe2+ As corrosion proceeds, the ferrous ions produced can react with the bicarbonate ions to form ferrous carbonate, which precipitates as a scale. |
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