ASTM G110-92(2022)e1

Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution

SIGNIFICANCE AND USE
4.1 This practice is especially useful for evaluating the adequacy of quenching when performed on material in the as-quenched condition. The practice may also be used to study the effect of subsequent thermal processes (for example, paint or bonding cures) or of actual precipitation treatments on the inherent type of corrosion. Intergranular corrosion resistance of heat treatable aluminum alloys is often directly related to the quenching conditions applied after solution heat treatment and to the subsequent aging treatment.4  
4.2 This practice is not well suited for non-heat treatable work hardening aluminum alloys, such as the 1XXX, 3XXX, and 5XXX series (see Test Method G67).  
4.3 This practice does not deal with the interpretation of resulting intergranular corrosion. The significance of the extent and depth of any intergranular corrosion resulting from this test is to be agreed upon between producer and user.
SCOPE
1.1 This practice covers the procedures for immersion tests in sodium chloride + hydrogen peroxide solution. It is primarily for tests of wrought heat treatable aluminum alloys (2XXX and 7XXX) but may be used for other aluminum alloys, including castings. It sets forth the specimen preparation procedures and the environmental conditions of the test and the means for controlling them.  
1.2 This practice is intended for evaluations during alloy development and for evaluating production where it may serve as a control test on the quality of successive lots of the same material (see MIL-H-6088 and U.S. Federal Test Method Std. 151b). Therefore strict test conditions are stipulated for maximum assurance that variations in results are attributable to lot-to-lot differences in the material being tested.
Note 1: This practice does not address sampling or interpretation or significance of results.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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.  
1.5 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: 30-Nov-2015
• ICS: 77.120.10 - Aluminium and aluminium alloys
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.05 - Laboratory Corrosion Tests

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: G110 − 92 (Reapproved 2022)
Standard Practice for
Evaluating Intergranular Corrosion Resistance of Heat
Treatable Aluminum Alloys by Immersion in Sodium
Chloride + Hydrogen Peroxide Solution
This standard is issued under the fixed designation G110; 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.
ε NOTE—Replaced Terminology G15 with Terminology G193, and other editorial changes made throughout in Dec. 2023.
1. Scope 2. Referenced Documents
1.1 This practice covers the procedures for immersion tests 2.1 ASTM Standards:
in sodium chloride + hydrogen peroxide solution. It is primar- D1193 Specification for Reagent Water
ily for tests of wrought heat treatable aluminum alloys (2XXX E3 Guide for Preparation of Metallographic Specimens
and 7XXX) but may be used for other aluminum alloys, E407 Practice for Microetching Metals and Alloys
including castings. It sets forth the specimen preparation G1 Practice for Preparing, Cleaning, and Evaluating Corro-
proceduresandtheenvironmentalconditionsofthetestandthe sion Test Specimens
means for controlling them. G67 Test Method for Determining the Susceptibility to
Intergranular Corrosion of 5XXX Series Aluminum Al-
1.2 This practice is intended for evaluations during alloy
loysbyMassLossAfterExposuretoNitricAcid(NAMLT
development and for evaluating production where it may serve
Test)
as a control test on the quality of successive lots of the same
G69 Test Method for Measurement of Corrosion Potentials
material (see MIL-H-6088 and U.S. Federal Test Method Std.
of Aluminum Alloys
151b). Therefore strict test conditions are stipulated for maxi-
G193 Terminology and Acronyms Relating to Corrosion
mum assurance that variations in results are attributable to
2.2 Other Documents:
lot-to-lot differences in the material being tested.
U.S. Military Specification MIL-H-6088 Heat Treatment of
NOTE 1—This practice does not address sampling or interpretation or
Aluminum Alloys
significance of results.
U.S. Federal Test Method, Std. No. 151b Method 822.1,
1.3 The values stated in SI units are to be regarded as
Intergranular Corrosion Test for Aluminum Alloys
standard. No other units of measurement are included in this
3. Summary of Practice
standard.
3.1 This practice consists of immersing etched test speci-
1.4 This standard does not purport to address all of the
mens in a sodium chloride + hydrogen peroxide solution for 6
safety concerns, if any, associated with its use. It is the
or more hours. After immersion, metallographic sections are
responsibility of the user of this standard to establish appro-
examined to determine the extent of intergranular corrosion
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. (see Terminology G193).
1.5 This international standard was developed in accor-
4. Significance and Use
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.1 This practice is especially useful for evaluating the
Development of International Standards, Guides and Recom- adequacy of quenching when performed on material in the
mendations issued by the World Trade Organization Technical as-quenched condition. The practice may also be used to study
Barriers to Trade (TBT) Committee. the effect of subsequent thermal processes (for example, paint
or bonding cures) or of actual precipitation treatments on the
1 2
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion For referenced ASTM standards, visit the ASTM website, www.astm.org, or
of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Corrosion Tests. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2015. Published January 2023. Originally the ASTM website.
approved in 1992. Last previous edition approved in 2015 as G110–92 (2015). DOI: Available from DLA Document Services, Building 4/D, 700 Robbins Ave.,
10.1520/G0110-92R22E01. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
G110 − 92 (2022)
inherenttypeofcorrosion.Intergranularcorrosionresistanceof the nominal cladding thickness. Chemical removal can be
heat treatable aluminum alloys is often directly related to the accomplished by immersion in a 5 % sodium hydroxide
quenching conditions applied after solution heat treatment and solution at 140 °F followed by immersion for 1 min in
to the subsequent aging treatment. concentrated nitric acid. Examine typical specimen cross
sections to be certain that cladding has been removed.
4.2 This practice is not well suited for non-heat treatable
work hardening aluminum alloys, such as the 1XXX, 3XXX, 7.4 Organic materials, such as coatings, soil, oils, and other
and 5XXX series (see Test Method G67).
residues, should be removed with organic solvents, for
example, acetone (see Practice G1).
4.3 This practice does not deal with the interpretation of
resulting intergranular corrosion.The significance of the extent
7.5 Prior to immersion in the test solution, immerse each
anddepthofanyintergranularcorrosionresultingfromthistest
specimen for 1 min in the etching cleaner (see 6.1)at93°C.
is to be agreed upon between producer and user.
Rinse in reagent water. Immerse in concentrated nitric acid
(70 %) for 1 min. Rinse in reagent water and air dry.
5. Reagents
5.1 Reagentgradechemicals[sodiumchloride(NaCl),70 %
8. Test Setup
nitric acid (HNO ), 48 % hydrofluoric acid (HF), 37 % hydro-
8.1 The test vessel should be of non
...

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: G110 − 92 (Reapproved 2015) G110 − 92 (Reapproved 2022)
Standard Practice for
Evaluating Intergranular Corrosion Resistance of Heat
Treatable Aluminum Alloys by Immersion in Sodium
Chloride + Hydrogen Peroxide Solution
This standard is issued under the fixed designation G110; 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.
ε NOTE—Replaced Terminology G15 with Terminology G193, and other editorial changes made throughout in Dec. 2023.
1. Scope
1.1 This practice covers the procedures for immersion tests in sodium chloride + hydrogen peroxide solution. It is primarily for
tests of wrought heat treatable aluminum alloys (2XXX and 7XXX) but may be used for other aluminum alloys, including castings.
It sets forth the specimen preparation procedures and the environmental conditions of the test and the means for controlling them.
1.2 This practice is intended for evaluations during alloy development and for evaluating production where it may serve as a
control test on the quality of successive lots of the same material (see MIL-H-6088 and U.S. Federal Test Method Std. 151b).
Therefore strict test conditions are stipulated for maximum assurance that variations in results are attributable to lot-to-lot
differences in the material being tested.
NOTE 1—This practice does not address sampling or interpretation or significance of results.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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.
1.5 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
2.1 ASTM Standards:
D1193 Specification for Reagent Water
E3 Guide for Preparation of Metallographic Specimens
E407 Practice for Microetching Metals and Alloys
G1 Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens
This practice is under the jurisdiction of ASTM Committee G01 on Corrosion of Metals and is the direct responsibility of Subcommittee G01.05 on Laboratory Corrosion
Tests.
Current edition approved Dec. 1, 2015. Published December 2015January 2023. Originally approved in 1992. Last previous edition approved in 20092015 as
G110–92(2009).G110–92 (2015). DOI: 10.1520/G0110-92R15.10.1520/G0110-92R22E01.
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’sstandard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
G110 − 92 (2022)
G15 Terminology Relating to Corrosion and Corrosion Testing (Withdrawn 2010)
G67 Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss
After Exposure to Nitric Acid (NAMLT Test)
G69 Test Method for Measurement of Corrosion Potentials of Aluminum Alloys
G193 Terminology and Acronyms Relating to Corrosion
2.2 Other Documents:
U.S. Military Specification MIL-H-6088 Heat Treatment of Aluminum Alloys
U.S. Federal Test Method, Std. No. 151b Method 822.1, Intergranular Corrosion Test for Aluminum Alloys
3. Summary of Practice
3.1 This practice consists of immersing etched test specimens in a sodium chloride + hydrogen peroxide solution for 6 or more
hours. After immersion, metallographic sections are examined to determine the extent of intergranular corrosion (see Terminology
G15G193).
4. Significance and Use
4.1 This practice is especially useful for evaluating the adequacy of quenching when performed on material in the as-quenched
condition. The practice may also be used to study the effect of subsequent thermal processes (for example, paint or bonding cures)
or of actual precipitation treatments on the inherent type of corrosion. Intergranular corrosion resistance of heat treatable aluminum
alloys is often directly related to the quenching conditions applied after solution heat treatment and to the subsequent aging
treatment.
4.2 This practice is not well suited for non-heat treatable work hardening aluminum alloys, such as the 1XXX, 3XXX, and 5XXX
series (see Test Method G67).
4.3 This practice does not deal with the interpretation of resulting intergranular corrosion. The significance of the extent and depth
of any intergranular corrosion resulting from this test is to be agreed upon between producer and user.
5. Reagents
5.1 Reagent grade chemicals [sodium chloride (NaCl), 70 % nitric acid (HNO ), 48 % hydrofluoric acid (HF), 37 % hydrochloric
acid (HCl), and 30 % hydrogen peroxide (H O )] shall be used for preparation of all solutions.
2 2
5.2 The solutions shall be prepared using distilled or deionized water conforming to the purity requirements for Specification
D1193, Type IV reagent water.
6. Solutions
6.1 Etching cleaner shall be prepared as follows: To 945 mL of reagent water add 50 mL of nitric acid (70 %) + 5 mL of
hydrofluoric acid (48 %). (See 6.2).
6.2 Test solution shall be prepared as follows: 57 grams of sodium chloride +10 mL of hydrogen peroxide (30 %—add just prior
to initiation of exposure) diluted to 1.0 L with reagent water. (Warning—Care should be exercised in handling and mixing strong
acids to avoid personal injury and damage to apparatus. Care should include use of per
...