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ASTM G110-92(2022)e2

(Practice)

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

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
Published
Publication Date
30-Nov-2022
ICS
77.120.10 - Aluminium and aluminium alloys
Technical Committee
G01 - Corrosion of Metals
Drafting Committee
G01.05 - Laboratory Corrosion Tests
Current Stage
Ref Project

Relations

Refers
ASTM G67-24 - Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test)
Effective Date
15-Jan-2024
Refers
ASTM E407-23 - Standard Practice for Microetching Metals and Alloys
Effective Date
01-Nov-2023
Refers
ASTM G69-20 - Standard Test Method for Measurement of Corrosion Potentials of Aluminum Alloys
Effective Date
01-May-2020
Refers
ASTM G67-18 - Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test)
Effective Date
01-Oct-2018
Refers
ASTM E407-07(2015)e1 - Standard Practice for Microetching Metals and Alloys
Effective Date
01-Jun-2015
Refers
ASTM G67-13 - Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test)
Effective Date
01-May-2013
Refers
ASTM G69-12 - Standard Test Method for Measurement of Corrosion Potentials of Aluminum Alloys
Effective Date
01-May-2012
Refers
ASTM G1-03(2011) - Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens
Effective Date
01-Dec-2011
Refers
ASTM G69-97(2009) - Standard Test Method for Measurement of Corrosion Potentials of Aluminum Alloys
Effective Date
01-May-2009
Refers
ASTM E3-01(2007) - Standard Guide for Preparation of Metallographic Specimens
Effective Date
01-Jul-2007
Refers
ASTM E3-01(2007)e1 - Standard Guide for Preparation of Metallographic Specimens
Effective Date
01-Jul-2007
Refers
ASTM E407-07 - Standard Practice for Microetching Metals and Alloys
Effective Date
01-May-2007
Refers
ASTM D1193-06 - Standard Specification for Reagent Water
Effective Date
01-Mar-2006
Refers
ASTM G67-04 - Standard Test Method for Determining the Susceptibility to Intergranular Corrosion of 5XXX Series Aluminum Alloys by Mass Loss After Exposure to Nitric Acid (NAMLT Test) (Withdrawn 2013)
Effective Date
01-May-2004
Refers
ASTM G1-03 - Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens
Effective Date
01-Oct-2003

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ASTM G110-92(2022)e2 - Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide SolutionASTM G110-92(2022)e2 - Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
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ASTM G110-92(2022)e2 - Standard Practice for Evaluating Intergranular Corrosion Resistance of Heat Treatable Aluminum Alloys by Immersion in Sodium Chloride + Hydrogen Peroxide Solution
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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
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. 2022.
2 1
ε NOTE—Footnote 1 and the ɛ NOTE were corrected editorially in January 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.
1.4 This standard does not purport to address all of the
3.1 This practice consists of immersing etched test speci-
safety concerns, if any, associated with its use. It is the mens in a sodium chloride + hydrogen peroxide solution for 6
responsibility of the user of this standard to establish appro-
or more hours. After immersion, metallographic sections are
priate safety, health, and environmental practices and deter- examined to determine the extent of intergranular corrosion
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
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 service@astm.org. For Annual Book of ASTM
Corrosion Tests. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Dec. 1, 2022. 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/G0110-92R22E02. 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
´2
G110 − 92 (2022)
or bonding cures) or of actual precipitation treatments on the 7.3 Claddings (especially alcladding) shall be removed
inherenttypeofcorrosion.Intergranularcorrosionresistanceof either mechanically or chemically to a depth of at least twice
heat treatable aluminum alloys is often directly related to the the nominal cladding thickness. Chemical removal can be
quenching conditions applied after solution heat treatment and accomplished by immersion in a 5 % sodium hydroxide
to the subsequent aging treatment. solution at 140 °F followed by immersion for 1 min in
concentrated nitric acid. Examine typical specimen cross
4.2 This practice is not well suited for non-heat treatable
sections to be certain that cladding has been removed.
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
4.3 This practice does not deal with the interpretation of
example, acetone (see Practice G1).
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 nitri
...

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ASTM G67-24(Test Method)
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SIGNIFICANCE AND USE
4.1 This test method provides a quantitative measure of the susceptibility to intergranular corrosion of Al-Mg and Al-Mg-Mn alloys. The nitric acid dissolves a second phase, an aluminum-magnesium intermetallic compound (βAl-Mg), in preference to the solid solution of magnesium in the aluminum matrix. When this compound is precipitated in a relatively continuous network along grain boundaries, the effect of the preferential attack is to corrode around the grains, causing them to fall away from the specimens. Such dropping out of the grains causes relatively large mass losses of the order of 25 mg/cm2  to 75 mg/cm2  (160 mg/in.2 to 480 mg/in.2), whereas, samples of intergranular-resistant materials lose only about 1 mg/cm2 to 15 mg/cm2 (10 mg/in.2 to 100 mg/in.2). When the βAl-Mg compound is randomly distributed, the preferential attack can result in intermediate mass losses. Metallographic examination is required in such cases to establish whether or not the loss in mass is the result of intergranular attack.  
4.2 The precipitation of the second phase in the grain boundaries also gives rise to intergranular corrosion when the material is exposed to chloride-containing natural environments, such as seacoast atmospheres or sea water. The extent to which the alloy will be susceptible to intergranular corrosion depends upon the degree of precipitate continuity in the grain boundaries. Visible manifestations of the attack may be in various forms such as pitting, exfoliation, or stress-corrosion cracking, depending upon the morphology of the grain structure and the presence of sustained tensile stress.3
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SIGNIFICANCE AND USE
4.1 This practice is normally used for stress-corrosion screening for the development of Al-Zn-Mg-Cu alloys containing less than 0.26 % copper. Effects on stress-corrosion resistance due to variables such as composition, thermo-mechanical processing, other fabrication variables, and magnitude of applied stress may be compared.  
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1.1 This practice primarily covers the test medium which may be used with a variety of test specimens and methods of applying stress. Exposure times, criteria of failure, and so on, are variable and not specified.  
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SIGNIFICANCE AND USE
4.1 This test method provides a quantitative measure of the susceptibility to intergranular corrosion of Al-Mg and Al-Mg-Mn alloys. The nitric acid dissolves a second phase, an aluminum-magnesium intermetallic compound (βAl-Mg), in preference to the solid solution of magnesium in the aluminum matrix. When this compound is precipitated in a relatively continuous network along grain boundaries, the effect of the preferential attack is to corrode around the grains, causing them to fall away from the specimens. Such dropping out of the grains causes relatively large mass losses of the order of 25 mg/cm2  to 75 mg/cm2  (160 mg/in.2 to 480 mg/in.2), whereas, samples of intergranular-resistant materials lose only about 1 mg/cm2 to 15 mg/cm2 (10 mg/in.2 to 100 mg/in.2). When the βAl-Mg compound is randomly distributed, the preferential attack can result in intermediate mass losses. Metallographic examination is required in such cases to establish whether or not the loss in mass is the result of intergranular attack.  
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SCOPE
1.1 This test method, also known as the Nitric Acid Mass Loss Test (NAMLT), covers a procedure for constant immersion intergranular corrosion testing of 5XXX series aluminum alloys.  
1.2 This test method is applicable only to wrought products.  
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1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 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.  
1.6 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.

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ABSTRACT
This specification covers the requirements relating to rinsed and non-rinsed non-hexavalent chromium conversion coatings on aluminum and aluminum alloys intended to retard corrosion; as a base for organic films including paints, plastics, and adhesives; and as.a protective coating having a low electrical contact impedance. Coatings are categorized into four classes according to corrosion protection and finish. The type of conversion coating depends on the composition of the solution and may also be affected by pH, temperature, duration of the treatment, and the nature and surface condition. Films are normally applied by dipping, but may also be applied by inundation, spraying, roller coating, or by wipe-on techniques. Coatings shall adhere to specified electrical resistance, adhesion, and corrosion resistance requirements.
SCOPE
1.1 This specification covers the requirements relating to rinsed and non-rinsed non-hexavalent chromium conversion coatings on aluminum and aluminum alloys intended to give protection against corrosion and as a base for other coatings.  
1.2 Aluminum and aluminum alloys are conversion coated in order to retard corrosion; as a base for organic films including paints, plastics, and adhesives; and as a protective coating having a low electrical contact impedance.  
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 requirements 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.

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ASTM
ASTM B317/B317M-23(Specification)
Standard Specification for Aluminum-Alloy Extruded Bar, Rod, Tube, Pipe, Structural Profiles, and Profiles for Electrical Purposes (Bus Conductor)

ABSTRACT
This specification covers 6101 aluminum-alloy extruded bar, rod, tube, pipe, (Schedules 40 and 80), structural profiles, and profiles in selected tempers for use as electric conductors. The bars, rods, tubes, pipes, structural profiles and profiles shall be produced by hot extrusion or by similar methods. Pipe or tube may be produced through porthole or bridge type dies. Tensile properties of the specimens such as tensile and yield strengths and bending shall be determined by tension test and bending test, respectively. Electrical resistivity and conductivity shall be determined.
SCOPE
1.1 This specification covers 6101 aluminum-alloy extruded bar, rod, tube, pipe, (Schedules 40 and 80), structural profiles, and profiles in selected tempers for use as electric conductors as follows:  
1.1.1 Type B—Hot-finished bar, rod, tube, pipe, structural profiles and profiles in T6, T61, T63, T64, T65, and H111 tempers with Type B tolerances, as shown in the “List of ANSI Tables of Dimensional Tolerances.”  
1.1.2 Type C—Hot-finished rectangular bar in T6, T61, T63, T64, T65, and H111 tempers with Type C tolerances as listed in the tolerances and permissible variations tables.  
1.2 Alloy and temper designations are in accordance with ANSI H35.1. The equivalent Unified Numbering System alloy designation in accordance with Practice E527 is A96101 for Alloy 6101.  
Note 1: Type A material, last covered in the 1966 issue of this specification, is no longer available; therefore, requirements for cold-finished rectangular bar have been deleted.  
1.3 The values stated in either SI or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
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.

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  • Technical specification
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ASTM
ASTM B648-23(Test Method)
Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Barcol Impressor

SIGNIFICANCE AND USE
4.1 The Barcol Impressor is portable and therefore useful for in situ determination of the hardness of fabricated parts and individual test specimens for production control purposes.  
4.2 This test method should be used only as cited in applicable material specifications.
SCOPE
1.1 This test method covers the determination of indentation hardness of aluminum alloys using a Barcol Impressor.  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.  
1.2.1 Some Barcol Impressors are for use on plastics and are not included in this test method and should not be used for aluminum alloys.  
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.

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  • Standard
    4 pages
    English language
    sale 15% off