ASTM G157-98(2018)
(Guide)Standard Guide for Evaluating Corrosion Properties of Wrought Iron- and Nickel-Based Corrosion Resistant Alloys for Chemical Process Industries
Standard Guide for Evaluating Corrosion Properties of Wrought Iron- and Nickel-Based Corrosion Resistant Alloys for Chemical Process Industries
SIGNIFICANCE AND USE
4.1 This guide is intended to provide a series of evaluations that will assist engineers dealing with chemical environments in selecting appropriate alloys (1-3). In chemical environments, an important issue for determining general corrosion resistance is the temperature at which an alloy transitions from corrosion at a low rate to corrosion at a much higher rate. Other important concerns include the tendency towards crevice corrosion and stress corrosion cracking resistance, especially in hot chloride-containing aqueous environments.
4.2 This guide is also intended for alloy developers to assist them in choosing environments and test methods that are of particular interest to the chemical process industries.
4.3 The use of this approach will allow direct comparisons to be made among alloys from various suppliers and, thereby, to assist engineers in selecting the most appropriate materials for further testing to determine suitability in their application.
SCOPE
1.1 This guide covers an evaluation approach that is designed to provide information on the corrosion properties of wrought iron- and nickel-based alloys for the chemical process industries. This guide incorporates test conditions for general corrosion measurements in a variety of environments, crevice corrosion resistance in chloride environments, and stress corrosion cracking resistance in chloride environments.
1.2 The values stated in SI units are to be regarded as standard. The values 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, health, and environmental practices and to 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
Relations
Standards Content (Sample)
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.
Designation: G157 − 98 (Reapproved 2018)
Standard Guide for
Evaluating Corrosion Properties of Wrought Iron- and
Nickel-Based Corrosion Resistant Alloys for Chemical
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Process Industries
This standard is issued under the fixed designation G157; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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1. Scope ing (Withdrawn 2010)
G30 Practice for Making and Using U-Bend Stress-
1.1 This guide covers an evaluation approach that is de-
Corrosion Test Specimens
signed to provide information on the corrosion properties of
G36Practice for Evaluating Stress-Corrosion-Cracking Re-
wroughtiron-andnickel-basedalloysforthechemicalprocess
sistance of Metals and Alloys in a Boiling Magnesium
industries. This guide incorporates test conditions for general
Chloride Solution
corrosion measurements in a variety of environments, crevice
G46Guide for Examination and Evaluation of Pitting Cor-
corrosion resistance in chloride environments, and stress cor-
rosion
rosion cracking resistance in chloride environments.
G48Test Methods for Pitting and Crevice Corrosion Resis-
1.2 The values stated in SI units are to be regarded as
tance of Stainless Steels and Related Alloys by Use of
standard. The values given in parentheses are for information
Ferric Chloride Solution
only.
G123TestMethodforEvaluatingStress-CorrosionCracking
1.3 This standard does not purport to address all of the
of Stainless Alloys with Different Nickel Content in
safety concerns, if any, associated with its use. It is the Boiling Acidified Sodium Chloride Solution
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and to 3. Terminology
determine the applicability of regulatory limitations prior to
3.1 Terms such as crevice corrosion, stress corrosion
use.
cracking, and corrosion rate are defined in Terminology G15.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Significance and Use
ization established in the Decision on Principles for the
4.1 This guide is intended to provide a series of evaluations
Development of International Standards, Guides and Recom-
that will assist engineers dealing with chemical environments
mendations issued by the World Trade Organization Technical
inselectingappropriatealloys(1-3).Inchemicalenvironments,
Barriers to Trade (TBT) Committee.
animportantissuefordetermininggeneralcorrosionresistance
is the temperature at which an alloy transitions from corrosion
2. Referenced Documents
at a low rate to corrosion at a much higher rate. Other
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2.1 ASTM Standards:
important concerns include the tendency towards crevice
D1193Specification for Reagent Water
corrosionandstresscorrosioncrackingresistance,especiallyin
G1Practice for Preparing, Cleaning, and Evaluating Corro-
hot chloride-containing aqueous environments.
sion Test Specimens
4.2 Thisguideisalsointendedforalloydeveloperstoassist
G15TerminologyRelatingtoCorrosionandCorrosionTest-
them in choosing environments and test methods that are of
particular interest to the chemical process industries.
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4.3 The use of this approach will allow direct comparisons
This guide is under the jurisdiction ofASTM Committee G01 on Corrosion of
Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory
to be made among alloys from various suppliers and, thereby,
Corrosion Tests.
to assist engineers in selecting the most appropriate materials
Current edition approved Oct. 1, 2018. Published November 2018. Originally
for further testing to determine suitability in their application.
approved in 1998. Last previous edition approved in 2013 as G157–98 (2013).
DOI: 10.1520/G0157-98R18.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G157 − 98 (2018)
5. General Corrosion Resistance
5.1 The general corrosion resistance of nickel- and iron-
based alloys is determined in 14 test solutions at various
temperatures to determine the lowest temperature at whic
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