Many corrosion inhibitor performance tests track the corrosion rate over time utilizing electrochemical methods such as linear polarization resistance (LPR). In most of these tests only a portion of the test data gathered are utilized in the final analysis of the corrosion inhibitor performance, namely, the initial uninhibited corrosion rate and the final steady state inhibited corrosion rate, from these two results the corrosion inhibitor performance or efficiency is calculated. Unfortunately, in this approach only the start and end of the test are utilized while the transient response of the corrosion rate versus time curve is discarded. The following paper describes an analysis method using Langmuir adsorption kinetics to extract from the response curve not only the corrosion inhibitor efficiency, but also the adsorption and desorption rate constants.

Subject
Inhibitor performance, Corrosion kinetics, Corrosion rate, Materials performance, Fittings, Adsorption, Desorption, Constants, Kinetics, Corrosion modeling, Corrosion inhibitors, Corrosion data, Linear polarization resistance
Keywords:
Corrosion inhibitor, Performance, Langmuir kinetics, Rate constants
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2021
Association for Materials Protection and Performance (AMPP)
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