Development of Experimental Devices and Methodologies to Study Corrosion Problems Related to the Oil and Gas Industry Available to Purchase

The use of carbon steel in environments containing CO₂, in some conditions, has been avoided due to the aggressiveness of the corrosive environment. However, by better understanding the mechanism of CO₂ corrosion and the role of important variables such as salinity and the effect of flow on corrosion, it is possible that, even in aggressive conditions, these materials are used, probably combined with a corrosion protection technique, like inhibitors. To performed such studies, four developments were done: 1) A two-electrode cell adapted to an autoclave to perform impedance measurements in highly resistive solutions at high pressures to investigate the mechanism of CO₂ corrosion; 2) A conductive level sensor associated with an electro-pneumatic discharge valve to renew the corrosive environment at high pressure, fundamental to maintain the pH constant; 3) A methodology to study the influence of the ionic strength on uniform corrosion isolating the effect of CO₂ on this corrosion and 4) an adaptation in the impingement jet system installed inside an autoclave to measure mass loss in addition to the conventional electrochemical measurements. These adaptations and developments in the experimental setup and methodology will be shown in this work.