Role of dissolved oxygen reduction in improvement inhibition performance of ascorbic acid during copper corrosion in 0.50 mol/L sulphuric acid |
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| Authors: | Mohammed A Amin |
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| Institution: | Chemistry Department, Faculty of Science, Ain Shams University, 11566 Abbassia, Cairo, Egypt |
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| Abstract: | The kinetics of dissolved O_2 reduction and hydrogen evolution reactions on copper surface was studied in naturally aerated and air and O_2-saturated 0.50 mol/L H_2SO_4 solutions using polarization measurements combined with the rotating disc electrode (RDE).The Koutecky-Levich plot indicated that the dissolved O_2 reduction at the copper electrode was an apparent four-electron process.A correlation between the presence of dissolved O_2 and the formation of Cu_2O,confirmed from XRD,was discussed. Ascorbic a... |
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| Keywords: | Copper Sulphuric acid solutions Corrosion inhibition Ascorbic acid RDE O_2 reduction |
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