ASTM G5-14

Standard Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements

SIGNIFICANCE AND USE
3.1 The availability of a standard procedure, standard material, and a standard plot should make it easy for an investigator to check his techniques. This should lead to polarization curves in the literature which can be compared with confidence.  
3.2 Samples of a standard ferritic Type 430 stainless steel (UNS S43000) used in obtaining standard reference plot are available for those who wish to check their own test procedure and equipment.3  
3.3 Standard potentiodynamic polarization plots are shown for a lot of material originally purchased in 1992. This test method is not applicable for standard material purchased before 1992. These reference data are based on the results from different laboratories that followed the standard procedure, using that material in 1.0 N H2SO4. The four sigma probability bands for current density values are shown at each potential to indicate the acceptable range of values.  
3.4 This test method may not be appropriate for polarization testing of all materials or in all environments.  
3.5 This test method is intended for use in evaluating the accuracy of a given electrochemical test apparatus, not for use in evaluating materials performance. Therefore, the use of the plots in Fig. 1 is not recommended to evaluate alloys other than Type 430, or lots of Type 430 other than those available through Metal Samples. The use of the data in this test method in this manner is beyond the scope and intended use of this test method. Users of this test method are advised to evaluate test results relative to the scatter bands corresponding to the particular lot of Type 430 stainless steel that was tested.
CURRENT DENSITY (μA/cm2)
SCOPE
1.1 This test method covers an experimental procedure for checking experimental technique and instrumentation. If followed, this test method will provide repeatable potentiodynamic anodic polarization measurements that will reproduce data determined by others at other times and in other laboratories provided all laboratories are testing reference samples from the same lot of Type 430 stainless steel.  
1.2 Units—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.

General Information

• Status: Historical
• Publication Date: 31-Oct-2014
• ICS: 71.040.50 - Physicochemical methods of analysis
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.11 - Electrochemical Measurements in Corrosion Testing

Relations

• Replaces: ASTM G5-13e2 - Standard Reference Test Method for Making Potentiodynamic Anodic Polarization Measurements
• Effective Date: 01-Nov-2014
• Referred By: ASTM G127-15(2023) - Standard Guide for the Selection of Cleaning Agents for Oxygen-Enriched Systems
• Effective Date: 01-Nov-2014
• Referred By: ASTM G192-08(2020)e1 - Standard Test Method for Determining the Crevice Repassivation Potential of Corrosion-Resistant Alloys Using a Potentiodynamic-Galvanostatic-Potentiostatic Technique
• Effective Date: 01-Nov-2014
• Referred By: ASTM E488/E488M-22 - Standard Test Methods for Strength of Anchors in Concrete Elements
• Effective Date: 01-Nov-2014
• Referred By: ASTM F1875-98(2022) - Standard Practice for Fretting Corrosion Testing of Modular Implant Interfaces: Hip Femoral Head-Bore and Cone Taper Interface
• Effective Date: 01-Nov-2014
• Referred By: ASTM G102-23 - Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
• Effective Date: 01-Nov-2014
• Referred By: ASTM F3044-20 - Standard Test Method for Evaluating the Potential for Galvanic Corrosion for Medical Implants
• Effective Date: 01-Nov-2014
• Referred By: ASTM G185-06(2020)e1 - Standard Practice for Evaluating and Qualifying Oil Field and Refinery Corrosion Inhibitors Using the Rotating Cylinder Electrode
• Effective Date: 01-Nov-2014
• Referred By: ASTM G61-86(2018) - Standard Test Method for Conducting Cyclic Potentiodynamic Polarization Measurements for Localized Corrosion Susceptibility of Iron-, Nickel-, or Cobalt-Based Alloys
• Effective Date: 01-Nov-2014
• Referred By: ASTM G106-89(2023) - Standard Practice for Verification of Algorithm and Equipment for Electrochemical Impedance Measurements
• Effective Date: 01-Nov-2014
• Referred By: ASTM G59-23 - Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements
• Effective Date: 01-Nov-2014
• Referred By: ASTM F1940-07a(2019) - Standard Test Method for Process Control Verification to Prevent Hydrogen Embrittlement in Plated or Coated Fasteners
• Effective Date: 01-Nov-2014
• Referred By: ASTM G119-09(2021) - Standard Guide for Determining Synergism Between Wear and Corrosion
• Effective Date: 01-Nov-2014
• Referred By: ASTM F519-18 - Standard Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments
• Effective Date: 01-Nov-2014
• Referred By: ASTM G111-21a - Standard Guide for Corrosion Tests in High Temperature or High Pressure Environment, or Both
• Effective Date: 01-Nov-2014

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: G5 − 14
Standard Reference Test Method for
Making Potentiodynamic Anodic Polarization
1
Measurements
This standard is issued under the fixed designation G5; the number immediately following the designation indicates the year of original
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope investigator to check his techniques. This should lead to
polarization curves in the literature which can be compared
1.1 This test method covers an experimental procedure for
with confidence.
checking experimental technique and instrumentation. If
followed, this test method will provide repeatable potentiody-
3.2 Samples of a standard ferritic Type 430 stainless steel
namic anodic polarization measurements that will reproduce (UNS S43000) used in obtaining standard reference plot are
data determined by others at other times and in other labora-
available for those who wish to check their own test procedure
3
tories provided all laboratories are testing reference samples and equipment.
from the same lot of Type 430 stainless steel.
3.3 Standard potentiodynamic polarization plots are shown
1.2 Units—The values stated in SI units are to be regarded
for a lot of material originally purchased in 1992. This test
asstandard.Nootherunitsofmeasurementareincludedinthis
method is not applicable for standard material purchased
standard.
before1992.Thesereferencedataarebasedontheresultsfrom
different laboratories that followed the standard procedure,
1.3 This standard does not purport to address all of the
usingthatmaterialin1.0NH SO .Thefoursigmaprobability
safety concerns, if any, associated with its use. It is the 2 4
bands for current density values are shown at each potential to
responsibility of the user of this standard to establish appro-
indicate the acceptable range of values.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
3.4 Thistestmethodmaynotbeappropriateforpolarization
testing of all materials or in all environments.
2. Referenced Documents
3.5 This test method is intended for use in evaluating the
2
2.1 ASTM Standards:
accuracy of a given electrochemical test apparatus, not for use
E691Practice for Conducting an Interlaboratory Study to
in evaluating materials performance. Therefore, the use of the
Determine the Precision of a Test Method
plotsinFig.1isnotrecommendedtoevaluatealloysotherthan
E1338Guide for Identification of Metals and Alloys in
Type 430, or lots of Type 430 other than those available
Computerized Material Property Databases
through Metal Samples.The use of the data in this test method
G3Practice for Conventions Applicable to Electrochemical
inthismannerisbeyondthescopeandintendeduseofthistest
Measurements in Corrosion Testing
method. Users of this test method are advised to evaluate test
G107Guide for Formats for Collection and Compilation of
results relative to the scatter bands corresponding to the
Corrosion Data for Metals for Computerized Database
particular lot of Type 430 stainless steel that was tested.
Input
4. Apparatus
3. Significance and Use
4.1 The test cell should be constructed to allow the follow-
3.1 The availability of a standard procedure, standard
ing items to be inserted into the solution chamber: the test
material, and a standard plot should make it easy for an
electrode, two auxiliary electrodes, a Luggin capillary with
salt-bridge connection to the reference electrode, inlet and
1
This test method is under the jurisdiction of ASTM Committee G01 on
outletforaninertgas,andathermometer.Thetestcellshallbe
Corrosion of Metals and is the direct responsibility of G01.11 on Electrochemical
constructed of materials that will not corrode, deteriorate, or
Measurements in Corrosion Testing.
otherwise contaminate the test solution.
Current edition approved Nov. 1, 2014. Published December 2014. Originally
ε2
approved in 1969. Last previous edition approved in 2013 as G5–13 . DOI:
10.1520/G0005-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM These standard samples are available from Metal Samples, 152 Metal Samples
Standards volume information, refer to the standard’s Document Summary page on Rd., Mumford,AL 36268. Generally, one sample can be repolished and reused for
the ASTM website. many runs. This procedure is suggested to conserve the available material.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
G5−14
2
CURRENT DENSITY (µA/cm )
FIG. 1 Typical Standard Potentiodynamic
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´2
Designation: G5 − 13 G5 − 14
Standard Reference Test Method for
Making Potentiodynamic Anodic Polarization
1
Measurements
This standard is issued under the fixed designation G5; the number immediately following the designation indicates the year of original
adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Corrected Research Report information in Section 7 editorially in December 2013.
1. Scope
1.1 This test method covers an experimental procedure for checking experimental technique and instrumentation. If followed,
this test method will provide repeatable potentiodynamic anodic polarization measurements that will reproduce data determined
by others at other times and in other laboratories provided all laboratories are testing reference samples from the same lot of Type
430 stainless steel.
1.2 Units—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
2
2.1 ASTM Standards:
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1338 Guide for Identification of Metals and Alloys in Computerized Material Property Databases
G3 Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing
G107 Guide for Formats for Collection and Compilation of Corrosion Data for Metals for Computerized Database Input
3. Significance and Use
3.1 The availability of a standard procedure, standard material, and a standard plot should make it easy for an investigator to
check his techniques. This should lead to polarization curves in the literature which can be compared with confidence.
3.2 Samples of a standard ferritic Type 430 stainless steel (UNS S43000) used in obtaining standard reference plot are available
3
for those who wish to check their own test procedure and equipment.
3.3 Standard potentiodynamic polarization plots are shown for a lot of material originally purchased in 1992. This test method
is not applicable for standard material purchased before 1992. These reference data are based on the results from different
laboratories that followed the standard procedure, using that material in 1.0 N H SO . The four sigma probability bands for current
2 4
density values are shown at each potential to indicate the acceptable range of values.
3.4 This test method may not be appropriate for polarization testing of all materials or in all environments.
3.5 This test method is intended for use in evaluating the accuracy of a given electrochemical test apparatus, not for use in
evaluating materials performance. Therefore, the use of the plots in Fig. 1 is not recommended to evaluate alloys other than Type
430, or lots of Type 430 other than those available through Metal Samples. The use of the data in this test method in this manner
1
This test method is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of G01.11 on Electrochemical Measurements
in Corrosion Testing.
Current edition approved Feb. 1, 2013Nov. 1, 2014. Published February 2013December 2014. Originally approved in 1969. Last previous edition approved in 20122013
ε2
as G5–12.–13 . DOI: 10.1520/G0005-13E02.10.1520/G0005-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
These standard samples are available from Metal Samples, 152 Metal Samples Rd., Mumford, AL 36268. Generally, one sample can be repolished and reused for many
runs. This procedure is suggested to conserve the available material.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
G5 − 14
2
CURRENT DENSITY (μA/cm )
FIG. 1 Typical Standard Potentiodynamic Anodic Polarization Plot
is beyond the scope and intended use of this test method. Users of this test method are advised to evaluate
...