Standards for Evaluating Oil Field Corrosion Inhibitors in the Laboratory

Abstract The success of a corrosion inhibitor in controlling internal corrosion depends on (1) when the application of it has started, (2) efficiency of it, (3) interference of it with other chemicals and processes, and (4) presence of intact inhibitor film on the surface to be protected. Several standards and industry best practices are available to evaluate these properties. They include: ASTM(A) G170, “Standard Guide for Evaluating and Qualifying Oilfield and Refinery Corrosion Inhibitors in the Laboratory”ASTM G184, “Standard Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors using Rotating Cage”ASTM G185, “Standard Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors using Rotating Cylinder Electrode”ASTM G202, “Standard Test Method for Using Atmospheric Pressure Rotating Cage”ASTM G205, “Standard Guide for Determining Corrosivity of Crude Oils”ASTM G208, “Standard Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors using Jet Impingement”NACE 1D182, “Wheel Test Method Used for Evaluation of Film-Persistent Corrosion Inhibitors for Oil Field Applications”NACE 1D196, “Laboratory Test Methods for Evaluating Oil Field Corrosion Inhibitors”European Federation of Corrosion (EFC)(B), “Test Methods for Corrosion Inhibitors”, Working Party Report #11 (1985)EFC, “Corrosion Inhibitors for Oil and Gas Production”, Working Party Report #39, 2004 This paper describes these standards, explains hierarchy of standards, and provides guidelines to obtain reliable and relevant data on corrosion inhibitors from laboratory.