ASTM G2/G2M-06
(Test Method)Standard Test Method for Corrosion Testing of Products of Zirconium, Hafnium, and Their Alloys in Water at 680°F [360°C]or in Steam at 750°F [400°C]
Standard Test Method for Corrosion Testing of Products of Zirconium, Hafnium, and Their Alloys in Water at 680°F [360°C]or in Steam at 750°F [400°C]
SIGNIFICANCE AND USE
This test method is primarily used as an acceptance test for products of zirconium, hafnium, and their alloys. This standard has been widely used in the development of new alloys, heat treating practices, and for evaluation of welding techniques.
Specimens are normally tested after careful etching and rinsing. Specimens with as-manufactured surfaces may also be tested without further surface removal.
When tubing with a second material clad on the inner surface is to be tested, the inner cladding shall be removed prior to the test.
SCOPE
1.1 This test method covers (1) the determination of mass gain, and (2) the surface inspection of products of zirconium, hafnium, and their alloys when corrosion tested in water at 680°F or in steam at 750°F.
1.2 This test method is to be utilized in its entirety to the extent specified herein as a product acceptance test.
1.3 This test method may be used on wrought products, castings, powder metallurgy products, and weld metals.
1.4 A complete metric companion to this test method has been developed, Test Method G 2M. Therefore, no metric equivalents are shown. However, since the mass gain and surface area of the specimen and the electrical resistivity of water are always measured or calculated in SI units, these are given in SI units.
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 and health practices and determine the applicability of regulatory limitations prior to use. For specific precautionary statements, see Section 9.
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: G2/G2M – 06
Standard Test Method for
Corrosion Testing of Products of Zirconium, Hafnium, and
Their Alloys in Water at 680°F [360°C] or in Steam at 750°F
1
[400°C]
This standard is issued under the fixed designation G2/G2M; 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.
1. Scope 3. Terminology
1.1 This test method covers (1) the determination of mass 3.1 Definitions of Terms Specific to This Standard:
gain, and (2) the surface inspection of products of zirconium, 3.1.1 control coupons, n—zirconium alloy specimens of
hafnium, and their alloys when corrosion tested in water at known performance used to monitor the validity of the test.
680°F [360°C] or in steam at 750°F [400°C]. 3.1.2 etching, n—a process for removal of surface metal by
1.2 This test method is to be utilized in its entirety to the action of acids in water.
extent specified herein as a product acceptance test. 3.1.3 Grade A water, n—purified water having a pH of 5.0
1.3 This test method may be used on wrought products, to 8.0 and an electrical resistivity of not less than 1.0 MV·cm.
castings, powder metallurgy products, and weld metals. 3.1.4 Grade B water, n—water prepared with deionized or
1.4 Unlessasingleunitisused,forexamplecorrosionmass demineralized water having a minimum electrical resistivity of
2
gain in mg/dm , the values stated in either inch-pound or SI 0.5 MV·cm.
units are to be regarded separately as standard. The values 3.1.5 ThestatedvaluesofpHandelectricalresistivityareto
stated in each system are not exact equivalents; therefore each be met after the measured values are corrected to 77°F [25°C].
system must be used independently of the other. SI values 3.1.6 high mass gain coupons, n—zirconium alloy speci-
cannot be mixed with inch-pound values. mens that have been specially heat-treated to produce a mass
1.5 This standard does not purport to address all of the gain higher than the maximum specified as acceptable value
safety concerns, if any, associated with its use. It is the used for verifying the severity of the test.
responsibility of the user of this standard to establish appro- 3.1.7 reagent grade, n—The grade of chemicals normally
priate safety and health practices and determine the applica- used for analytical purposes.
bility of regulatory limitations prior to use. For specific
4. Summary of Test Method
precautionary statements, see Section 9.
4.1 Specimens of zirconium, hafnium, or their alloys are
2. Referenced Documents
exposed to high-pressure water or steam at elevated tempera-
2
2.1 ASTM Standards: tures for 72 or 336 h. The corrosion is normally measured by
D888 Test Methods for Dissolved Oxygen in Water thegaininmassofthespecimensandbytheappearanceofthe
E29 Practice for Using Significant Digits in Test Data to oxidefilmonthespecimensurfaces.Insomeinstances,suchas
Determine Conformance with Specifications weld evaluation, mass gain measurements are either impracti-
cal to make or not required. When so specified, appearance of
the specimen shall be the sole criterion for acceptance.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeB10onReactive
and Refractory Metals andAlloys and is the direct responsibility of Subcommittee
5. Significance and Use
B10.02 on Zirconium and Hafnium.
Current edition approved March 1, 2006. Published March 2006. Originally
5.1 This test method is primarily used as an acceptance test
approved in 1967. Last previous edition approved in 2002 as G2–88(2002). DOI:
for products of zirconium, hafnium, and their alloys. This
10.1520/G0002_G0002M-06.
2 standard has been widely used in the development of new
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
alloys, heat treating practices, and for evaluation of welding
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
techniques.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
G2/G2M – 06
5.2 Specimens are normally tested after careful etching and 9. Hazards
rinsing. Specimens with as-manufactured surfaces may also be
9.1 The chemicals used in preparing specimens for this test
tested without further surface removal.
are hazardous. Detailed information on safe handling of
5.3 When tubin
...
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