ASTM G108-94(1999)

    Standard Test Method for Electrochemical Reactivation (EPR) for Detecting Sensitization of AISI Type 304 and 304L Stainless Steels


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    1. Scope

    1.1 This test method describes a laboratory procedure for conducting an electrochemical reactivation (EPR) test on AISI Type 304 and 304L (UNS No. S30400 and S30403, respectively) stainless steels. This test method can provide a nondestructive means of quantifying the degree of sensitization in these steels (1, 2, 3). This test method has found wide acceptance in studies of the effects of sensitization on intergranular corrosion and intergranular stress corrosion cracking behavior (see Terminology G15). The EPR technique has been successfully used to evaluate other stainless steels and nickel base alloys (4), but the test conditions and evaluation criteria used were modified in each case from those cited in this test method.

    1.2 The values stated in SI units are to be regarded as the standard. The inch-pound units given in parentheses are for information only.

    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

    A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels

    D1193 Specification for Reagent Water

    E3 Guide for Preparation of Metallographic Specimens

    E7 Terminology Relating to Metallography

    E112 Test Methods for Determining Average Grain Size

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

    G3 Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing

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

    G15 Terminology Relating to Corrosion and Corrosion Testing

    G28 Test Methods for Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich, Chromium-Bearing Alloys

    G61 Test Method for Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys


    ICS Code

    ICS Number Code 77.140.20 (Steels of high quality)

    UNSPSC Code

    UNSPSC Code 41114604(Corrosion testers)


    Referencing This Standard

    DOI: 10.1520/G0108-94R99

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM G108-94(1999), Standard Test Method for Electrochemical Reactivation (EPR) for Detecting Sensitization of AISI Type 304 and 304L Stainless Steels, ASTM International, West Conshohocken, PA, 1999, www.astm.org

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