ASTM G2-88(2002)
(Test Method)Standard Test Method for Corrosion Testing of Products of Zirconium, Hafnium, and Their Alloys in Water at 680°F or in Steam at 750°F
Standard Test Method for Corrosion Testing of Products of Zirconium, Hafnium, and Their Alloys in Water at 680°F or in Steam at 750°F
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:G2–88(Reapproved2002)
Standard Test Method for
Corrosion Testing of Products of Zirconium, Hafnium, and
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Their Alloys in Water at 680°F or in Steam at 750°F
This standard is issued under the fixed designation G2; the number immediately following the designation indicates the year of original
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
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 or in steam at 750°F. 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 A complete metric companion to this test method has demineralized water having a minimum electrical resistivity of
been developed, Test Method G2M. Therefore, no metric 0.5 MV·cm.
equivalents are shown. However, since the mass gain and 3.1.5 ThestatedvaluesofpHandelectricalresistivityareto
surface area of the specimen and the electrical resistivity of be met after the measured values are corrected to 77°F.
water are always measured or calculated in SI units, these are 3.1.6 high mass gain coupons, n—zirconium alloy speci-
given in SI units. 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-
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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
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Determine Conformance with Specifications weld evaluation, mass gain measurements are either impracti-
G2M Test Method for Corrosion Testing of Products of cal to make or not required. When so specified, appearance of
Zirconium, Hafnium, and Their Alloys in Water at 633°K the specimen shall be the sole criterion for acceptance.
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or in Steam at 673°K [Metric]
5. Significance and Use
5.1 This test method is primarily used as an acceptance test
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ThistestmethodisunderthejurisdictionofASTMCommitteeB10onReactive
for products of zirconium, hafnium, and their alloys. This
and Refractory Metals andAlloys and is the direct responsibility of Subcommittee
standard has been widely used in the development of new
B10.02 on Zirconium and Hafnium.
Current edition approved Jan. 29, 1988. Published March 1988. Originally
alloys, heat treating practices, and for evaluation of welding
published as G2–67. Last previous edition G2–81. DOI: 10.1520/G0002-88R02.
techniques.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.2 Specimens are normally tested after careful etching and
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 rinsing. Specimens with as-manufactured surfaces may also be
the ASTM website.
tested without further surface removal.
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Withdrawn.
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Withdrawn. The last approved version of this historical standard is referenced
on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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G2–88 (2002)
5.3 When tubing with a second material clad on the inner organiccompounds,acidsandproductsofzirconium,hafnium,
surface is to be tested, the inner cladding shall be removed a
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