Hydrogen uptake during active CO2-H2S corrosion of carbon steel wires in simulated annulus fluid

A MODEL FOR CALCULATING RATES OF GENERAL CORROSION OF CARBON STEEL AND 13%Cr STAINLESS STEEL IN CO2/H2S ENVIRONMENTS

A model has been developed for calculating the rates of general corrosion of carbon steel and 13%Cr steel in aqueous systems containing carbon dioxide, hydrogen sulfide and other components. The model combines a comprehensive thermodynamic speciation module with electrochemical computations based on the mixed-potential theory. The electrochemical calculations recognize the effects of various pa...

EIS investigation of CO2/H2S corrosion

This paper covers one of the building blocks required to complete a mechanistic CO2 / H2S corrosion model: electrochemistry of carbon steel CO2 corrosion in the presence of traces of H2S (3-250 ppm in the gas phase). Electrochemical impedance spectroscopy and linear polarisation resistance were used to investigate the mechanism of CO2/H2S corrosion in a glass cell at room temperature, at atmosp...

Use and Abuse of Eis in Studying the Mechanisms of Co2/h2s Corrosion of Mild Steel

Electrochemical Impedance Spectroscopy (EIS) is a powerful transient technique which enables an insight into the corrosion process not easily obtained by other predominantly DC techniques. However the EIS technique presents a large challenge both from a theoretical as well as an experimental point of view. Collecting accurate EIS raw data is not easy as EIS is plagues with errors not seen by th...

Hydrogen Generation During the Corrosion of Carbon Steel in Oxalic Acid

A Mechanistic Model of H2s Corrosion of Mild Steel

Glass cell experiments were conducted to investigate the mechanism and kinetics of mild steel corrosion in H2S environments which is accompanied by iron sulfide scale formation. By using the weight change method, the rates of corrosion and scale formation were found. It was also concluded that mackinawite is the predominant type of iron sulfide that formed on the steel surface under the test co...