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51314-3907-Electrochemical Model Of Mild Steel Corrosion In A Mixed H2s/Co2 Aqueous Environment

Picture for Electrochemical Model Of Mild Steel Corrosion In A Mixed H2s/Co2 Aqueous Environment
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Product Number: 51314-3907-SG
ISBN: 3907 2014 CP
Author: Yougui Zheng
Publication Date: 2014
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The present study has been conducted to investigate the electrochemistry of mild steel corrosion in mixed H2S/CO2 environments and develop an electrochemical model to simulate the experimental results. The experiments were designed to determine the effect of H2S on CO2 corrosion. Tests were conducted at different H2S concentrations from 0 to 10% in gas phase at 1 bar pressure in solution conditions at pH4 and pH5. Corrosion rates were measured by linear polarization resistance (LPR) and the corrosion mechanisms were investigated by using potentiodynamic sweeps (PD). Results show that the presence of H2S slows down the charge transfer kinetics related to H2CO3 reduction and H2O reduction in on the metal surface. An electrochemical model for short term exposures of a few hours was developed for this H2S/CO2 system with verification by experimental results and refereed journal papers. The model prediction overestimates the experimental results for longer term exposures (days) due to the formation of iron sulfide corrosion product layer.
The present study has been conducted to investigate the electrochemistry of mild steel corrosion in mixed H2S/CO2 environments and develop an electrochemical model to simulate the experimental results. The experiments were designed to determine the effect of H2S on CO2 corrosion. Tests were conducted at different H2S concentrations from 0 to 10% in gas phase at 1 bar pressure in solution conditions at pH4 and pH5. Corrosion rates were measured by linear polarization resistance (LPR) and the corrosion mechanisms were investigated by using potentiodynamic sweeps (PD). Results show that the presence of H2S slows down the charge transfer kinetics related to H2CO3 reduction and H2O reduction in on the metal surface. An electrochemical model for short term exposures of a few hours was developed for this H2S/CO2 system with verification by experimental results and refereed journal papers. The model prediction overestimates the experimental results for longer term exposures (days) due to the formation of iron sulfide corrosion product layer.
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