[Zurück]

A. Prethaler, G. Mori, W. Havlik, G. Zehethofer, S. Hönig, E. Rosenberg, M. Rückemann:
"Evaluation of Performance of an Amine Based and An Imidazoline Based Gas and Gas Condensate Inhibitor Tested with High Velocity Laboratory Test Rig";
Vortrag: Corrosion 2015, Dallas, United States; 15.03.2015 - 19.03.2015; in: "NACE - International Corrosion Conference Series", National Assoc. of Corrosion Engineers International, 113704 (2015), ISBN: 978-1-5108-0188-2; S. 2827 - 2838.

An amine based CO2 corrosion inhibitors and an imidazoline based CO2 corrosion inhibitor has been tested in a two-phase laboratory flow loop system under conditions of a mature gas condensate well in Austria. After a detailed description of the experimental setups, degradation rates of material API (1) L-80 (UNS G41300) as function of flow velocity and inhibitor dosage are presented. Further one the influence of chloride addition on inhibitor performance has been investigated. All results are discussed with respect to critical inhibitor concentration to reach nearly 100 % inhibitor efficiency. Inhibitor one exhibits as an active ingredient alkylamine dissolved in ethylene glycol and different alcohols and the effect of inhibitor two is basically based on imidazoline dissolved in different alcohols. Results demonstrate that the test rig delivers resonabie results with respect to inhibitor protection rates. Independent of superficial flow velocities (tested between 3 and 35 m/s) both inhibitors exhibit a good performance, as long as dosed above their critical concentration. The critical concentration is clearly below 100 ppm to the liquid phase. Addition of chlorides affects the performance of the alkylamine based inhibitor significantly more than in case of the imidazoline. © 2015 by Nace International.

https://www.onepetro.org/conference-paper/NACE-2015-5713