Session: Corrosion Inhibitors in the Oil and Gas Industry (Part II of III)
High-Temperature High-Pressure Testing of Corrosion Inhibitors with High Liquid Volume-to-Sample Surface Area Ratio (C2026-00285)
Thursday, March 19, 2026
11:30 AM - 12:00 PM Central
Location: 362 DE
Earn .5 PDH
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The performance testing of corrosion inhibitors under high temperature high pressure (HTHP) conditions is usually performed using a closed system in the Laboratory. In the laboratory the liquid volume-to-sample surface area (V/S) ratio is a critical parameter and usually low (~100 mL/cm2 or less) while it is nearly infinite in the field. In this study, the HTHP CO2 corrosion was investigated with a working electrode of a small surface area in the autoclave and the V/S ratio was as high as 5833 mL/cm2. In the blank testing, the corrosion rate monitored by linear polarization resistance (LPR) was high and multiple stages were found in the plot of corrosion rate vs. time. The performance of several corrosion inhibitors was also studied. Finally, corrosion inhibitors were injected at different stages of testing to examine their performance at different surface conditions.
