One of the most conventional methods to mitigate CO2 corrosion of pipelines in the oil and gas industry is to use chemical corrosion inhibitors. Probably the most commonly used inhibition method in the upstream oil and gas industry involves the continuous injection of an appropriate chemical formulation package to maintain a constant concentration of inhibitor in the fluid flowing through the pipeline. Selection of the inhibitor package is typically done through a tedious laboratory testing campaign, which involves the determination of the inhibitor efficiency and persistency in simulated production conditions. Developing laboratory methodologies that can help assessing these properties is of prime importance. This study presents methodologies that could simulate continuous inhibitor treatment (for the determination of efficiency), and also interruption of inhibitor injection (for the assessment of persistency). The study was performed using a model, yet representative, compound benzyldimethylammonium type CO2 corrosion inhibitor (BDA-C14). Its adsorption/desorption behavior was characterized. Furthermore, the influence of several key aspects of the experimental methodologies, such inhibitor contact and pre-corrosion times were examined using BDA-C14, mostly to investigate the effects of the iron carbide layer on inhibitor persistency. A three-electrode system using a rotating cylinder electrode (RCE) for the working electrode was used in this study with the ability for continuous flow-through dilution. All experiments were divided into three main steps: pre-corrosion, inhibitor addition and corrosion rate stabilization, then inhibitor dilution. The corrosion rate was monitored using linear polarization resistance (LPR) in all experiments. Langmuir isotherm model was used to model inhibitor adsorption and desorption behavior of BDA-C14 inhibitor using calculated kinetic coefficients.