ASTM G208 - 12

    Standard Practice for Evaluating and Qualifying Oilfield and Refinery Corrosion Inhibitors Using Jet Impingement Apparatus

    Active Standard ASTM G208 | Developed by Subcommittee: G01.05

    Book of Standards Volume: 03.02

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    Significance and Use

    5.1 Selection of corrosion inhibitor for oilfield and refinery applications involves qualification of corrosion inhibitors in the laboratory (see Guide G170). Field conditions should be simulated in the laboratory in a fast and cost-effective manner.

    5.2 Oilfield and refinery corrosion inhibitors should provide protection over a range of flow conditions from stagnant to that found during typical production conditions. The inhibitors are not equally effective over all flow conditions, so it is important to determine the flow conditions in which they are effective.

    5.3 Severity of hydrodynamic conditions depends on the type of laboratory methodology. Typically, rotating cylinder electrode is effective up to 20 Pa of wall shear stress, rotating cage (RC) is effective between 20 and 200 Pa of wall shear stress, and jet impingement (JI) is effective at wall shear stress above 200 Pa (1)3 of wall shear stress.

    5.4 The JI test system is relatively inexpensive and uses simple flat specimens.

    5.5 In this practice, a general procedure is presented to obtain reproducible results using JI simulating the effects of different types of coupon materials; inhibitor concentrations; oil, gas, and brine compositions; temperature; pressure; and flow. Erosive effects predominate when the flow rate is very high (typically above 500 Pa) or when sand or solid particles are present; however, this practice does not cover the erosive effects.

    1. Scope

    1.1 This practice covers a generally accepted procedure to use the jet impingement (JI) apparatus for evaluating corrosion inhibitors for oilfield and refinery applications in defined flow conditions.

    1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1141 Practice for the Preparation of Substitute Ocean Water

    D1193 Specification for Reagent Water

    D4410 Terminology for Fluvial Sediment

    G1 Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens

    G5 Reference Test Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements

    G16 Guide for Applying Statistics to Analysis of Corrosion Data

    G31 Guide for Laboratory Immersion Corrosion Testing of Metals

    G46 Guide for Examination and Evaluation of Pitting Corrosion

    G59 Test Method for Conducting Potentiodynamic Polarization Resistance Measurements

    G96 Guide for Online Monitoring of Corrosion in Plant Equipment (Electrical and Electrochemical Methods)

    G102 Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements

    G106 Practice for Verification of Algorithm and Equipment for Electrochemical Impedance Measurements

    G111 Guide for Corrosion Tests in High Temperature or High Pressure Environment, or Both

    G170 Guide for Evaluating and Qualifying Oilfield and Refinery Corrosion Inhibitors in the Laboratory

    G184 Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors Using Rotating Cage

    G185 Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors Using the Rotating Cylinder Electrode

    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 12163600(Corrosion inhibitors)

    DOI: 10.1520/G0208-12

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