Abstract
Abstract Since oil field corrosion inhibitors are often complex mixtures of several impure compounds such as amines, fatty acids, reaction products of acids and amines, as well as surfactants and solvents, it is difficult to analyze them qualitatively and quantitatively for proper formulation. Previously, performance criteria on wheel tests were interpreted to indicate proper or improper inhibitor formulation. It is now possible to simplify this difficult task with a method that actually reveals inhibitor composition, using the spectroscopic techniques of carbon-13 nuclear magnetic resonance (13C NMR) and Fourier transform-infrared spectroscopy (FT-IR). These complementary techniques can reveal considerable qualitative information on the components of an inhibitor. In addition, a strictly empirical method has been developed that yields semiquantitative information concerning the proportions of the components used in an inhibitor. This study describes the use of 13C NMR and FT-IR to ensure the quality of o...
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