ASTM G5-14e1

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.
FIG. 1 Typical Standard Potentiodynamic Anodic Polarization Plot
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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

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
´1
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
ε NOTE—Editorially corrected Table 1 in August 2018.
1. Scope Measurements in Corrosion Testing
G107Guide for Formats for Collection and Compilation of
1.1 This test method covers an experimental procedure for
Corrosion Data for Metals for Computerized Database
checking experimental technique and instrumentation. If
Input
followed, this test method will provide repeatable potentiody-
namic anodic polarization measurements that will reproduce
3. Significance and Use
data determined by others at other times and in other labora-
3.1 The availability of a standard procedure, standard
tories provided all laboratories are testing reference samples
material, and a standard plot should make it easy for an
from the same lot of Type 430 stainless steel.
investigator to check his techniques. This should lead to
1.2 Units—The values stated in SI units are to be regarded
polarization curves in the literature which can be compared
asstandard.Nootherunitsofmeasurementareincludedinthis
with confidence.
standard.
3.2 Samples of a standard ferritic Type 430 stainless steel
1.3 This standard does not purport to address all of the
(UNS S43000) used in obtaining standard reference plot are
safety concerns, if any, associated with its use. It is the
available for those who wish to check their own test procedure
responsibility of the user of this standard to establish appro-
3
and equipment.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 3.3 Standard potentiodynamic polarization plots are shown
for a lot of material originally purchased in 1992. This test
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard- method is not applicable for standard material purchased
ization established in the Decision on Principles for the before1992.Thesereferencedataarebasedontheresultsfrom
Development of International Standards, Guides and Recom- different laboratories that followed the standard procedure,
mendations issued by the World Trade Organization Technical usingthatmaterialin1.0NH SO .Thefoursigmaprobability
2 4
Barriers to Trade (TBT) Committee. bands for current density values are shown at each potential to
indicate the acceptable range of values.
2. Referenced Documents
3.4 Thistestmethodmaynotbeappropriateforpolarization
2
2.1 ASTM Standards:
testing of all materials or in all environments.
E691Practice for Conducting an Interlaboratory Study to
3.5 This test method is intended for use in evaluating the
Determine the Precision of a Test Method
accuracy of a given electrochemical test apparatus, not for use
E1338Guide for Identification of Metals and Alloys in
in evaluating materials performance. Therefore, the use of the
Computerized Material Property Databases
plotsinFig.1isnotrecommendedtoevaluatealloysotherthan
G3Practice for Conventions Applicable to Electrochemical
Type 430, or lots of Type 430 other than those available
through Metal Samples.The use of the data in this test method
inthismannerisbeyondthescopeandintendeduseofthistest
1
This test method is under the jurisdiction of ASTM Committee G01 on
method. Users of this test method are advised to evaluate test
Corrosion of Metals and is the direct responsibility of G01.11 on Electrochemical
results relative to the scatter bands corresponding to the
Measurements in Corrosion Testing.
Current edition approved Nov. 1, 2014. Published December 2014. Originally
particular lot of Type 430 stainless steel that was tested.
ε2
approved in 1969. Last previous edition approved in 2013 as G5–13 . DOI:
10.1520/G0005-14E01.
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 ----------------------
´1
G5−14
2
CURRENT DENSITY (µA/cm )
FIG. 1 Typical Standard Potentiodynamic Anodic P
...

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.
´1
Designation: G5 − 14 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—Editorially corrected Table 1 in August 2018.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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.
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.
ε2
Current edition approved Nov. 1, 2014. Published December 2014. Originally approved in 1969. Last previous edition approved in 2013 as G5–13 . DOI:
10.1520/G0005-14.10.1520/G0005-14E01.
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 ----------------------
´1
G5 − 14
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
...