ASTM G110-92(2003)e1

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

SIGNIFICANCE AND USE
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.6  
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 G 67).
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 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: 30-Sep-2003
• Technical Committee: G01 - Corrosion of Metals
• Drafting Committee: G01.05 - Laboratory Corrosion Tests

Relations

• Replaces: ASTM G110-92(1997) - Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
• Effective Date: 01-Oct-2003
• Replaced By: ASTM G110-92(2009) - Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
• Effective Date: 01-May-2009
• Referred By: ASTM B917/B917M-12(2020) - Standard Practice for Heat Treatment of Aluminum-Alloy Castings From All Processes
• Effective Date: 01-Oct-2003
• Referred By: ASTM G31-21 - Standard Guide for Laboratory Immersion Corrosion Testing of Metals
• Effective Date: 01-Oct-2003

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
e1
Designation:G110–92(Reapproved 2003)
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 G 110; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Warning notes were editorially moved into main body text in October 2003.
1. Scope G 15 Terminology Relating to Corrosion and Corrosion
Testing
1.1 This practice covers the procedures for immersion tests
G 67 Test Method for Determining the Susceptibility to
in sodium chloride + hydrogen peroxide solution. It is prima-
Intergranular Corrosion of 5XXX SeriesAluminumAlloys
rily for tests of wrought heat treatable aluminum alloys (2XXX
by Mass Loss After Exposure to Nitric Acid (NAMLT
and 7XXX) but may be used for other aluminum alloys,
Test)
including castings. It sets forth the specimen preparation
G 69 Practice for Measurement of Corrosion Potentials of
proceduresandtheenvironmentalconditionsofthetestandthe
Aluminum Alloys
means for controlling them.
2.2 Other Documents:
1.2 This practice is intended for evaluations during alloy
U.S. Military Specification MIL-H-6088, HeatTreatment of
development and for evaluating production where it may serve
Aluminum Alloys
as a control test on the quality of successive lots of the same
U.S. Federal Test Method, Standard No.
material (see MIL-H-6088 and U.S. Federal Test Method Std.
151b, Method 822.1, Intergranular Corrosion Test for
151b). Therefore strict test conditions are stipulated for maxi-
Aluminum Alloys
mum assurance that variations in results are attributable to
lot-to-lot differences in the material being tested.
3. Summary of Practice
NOTE 1—This practice does not address sampling or interpretation or
3.1 This practice consists of immersing etched test speci-
significance of results.
mens in a sodium chloride + hydrogen peroxide solution for 6
1.3 This standard does not purport to address all of the
or more hours. After immersion, metallographic sections are
safety concerns, if any, associated with its use. It is the
examined to determine the extent of intergranular corrosion
responsibility of the user of this standard to establish appro-
(see Terminology G 15).
priate safety and health practices and determine the applica-
4. Significance and Use
bility of regulatory limitations prior to use.
4.1 This practice is especially useful for evaluating the
2. Referenced Documents
adequacy of quenching when performed on material in the
2.1 ASTM Standards:
as-quenched condition. The practice may also be used to study
D 1193 Specification for Reagent Water
the effect of subsequent thermal processes (for example, paint
E 3 Methods of Preparation of Metallographic Specimens
or bonding cures) or of actual precipitation treatments on the
E 407 Test Methods for Microetching Metals and Alloys
inherenttypeofcorrosion.Intergranularcorrosionresistanceof
G 1 Practice for Preparing, Cleaning, and Evaluating Cor-
heat treatable aluminum alloys is often directly related to the
rosion Test Specimens
quenching conditions applied after solution heat treatment and
to the subsequent aging treatment.
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 October 1, 2003. Published October 2003. Originally Available from Standardization Documents Order Desk, Building 4, Section D,
approved in 1992. Last previous edition approved in 1997 as G 110 – 92 (1997). 700 Robbins Avenue, Philadelphia, PA 19111-5094.
2 6
Annual Book of ASTM Standards, Vol 11.01. Lifka, B. W., and Sprowls, D. O., “Significance of Intergranular Corrosion of
Annual Book of ASTM Standards, Vol 03.01. High Strength Aluminum Alloy Products,” Localized Corrosion Cause of Metal
Annual Book of ASTM Standards, Vol 03.02. Failure, ASTM STP 516 (1972), pp. 120–144.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
e1
G110–92 (2003)
4.2 This practice is not well suited for non-heat treatable 8. Test Setup
work hardening aluminum alloys, such as the 1XXX, 3XXX,
8.1 The test vessel should be of nonmetallic material of
and 5XXX series (see Test Method G 67).
sufficient size to hold at least 5 mL of test solution per square
4.3 This practice does not deal with the interpretation of
cm of specimen surface area.
resulting intergranular corrosion.The significance of the extent
8.2 More than one specimen may be placed in a test vessel,
anddepthofanyintergranularcorrosionresultingfromthistest
provided specimens do not contact each other and provided
is to be agreed upon between producer and user.
condition outlined in 8.1 is observed.
8.3 Specimens shall be prevented from contacting the bot-
5. Reagents
tom of the test vessel by placing the specimens on glass rods or
5.1 Reagentgradechemicals[sodiumchloride(NaCl),70 %
rubber stoppers. (Rubber stoppers may be deteriorated by
nitric acid (HNO ), 48 % hydrofluoric acid (HF), 37 % hydro-
hydrogen peroxide.)
chloric acid (HCl), and 30 % hydrogen peroxide (H O )] shall
2 2
8.4 The exposure shall be conducted at a temperature of 30
be used for preparation of all solutions.
6 3°C.
5.2 The solutions shall b
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