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ASTM D2688-05

(Test Method)

Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)

Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)

SIGNIFICANCE AND USE
Since the two tendencies are inseparable for a metal to corrode and for water and the materials it contains to promote or inhibit corrosion, the corrosiveness of a material or the corrosivity of water must be determined in relative, rather than absolute, terms. The tendency for a material to corrode is normally determined by measuring its rate of corrosion and comparing it with the corrosion rates of other materials in the same water environment. Conversely, the relative corrosivity of water may be determined by comparing the corrosion rate of a material in the water with the corrosion rates of the same material in other waters. Such tests are useful, for example, for evaluating the effects of corrosion inhibitors on the corrosivity of water. Although this test methods is intended to determine the corrosivity of water, it is equally useful for determining corrosiveness and corrosion rate of materials. Examples of systems in which this method may be used include but are not limited to open recirculating cooling water and closed chilled and hydronic heating systems.
SCOPE
1.1 This test method covers the determination of the corrosivity of water by evaluating pitting and by measuring the weight loss of metal specimens. Pitting is a form of localized corrosion: weight loss is a measure of the average corrosion rate. The rate of corrosion of a metal immersed in water is a function of the tendency for the metal to corrode and is also a function of the tendency for water and the materials it contains to promote (or inhibit) corrosion.
1.2 The test method employs flat, rectangular-shaped metal coupons which are mounted on pipe plugs and exposed to the water flowing in metal piping in municipal, building, and industrial water systems using a side stream corrosion specimen rack.
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
31-Dec-2004
ICS
13.060.60 - Examination of physical properties of water
Technical Committee
D19 - Water
Drafting Committee
D19.03 - Sampling Water and Water-Formed Deposits, Analysis of Water for Power Generation and Process Use, On-Line Water Analysis, and Surveillance of Water
Current Stage
Ref Project

Relations

Replaces
ASTM D2688-94(1999)e1 - Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)
Effective Date
01-Jan-2005
Replaced By
ASTM D2688-11 - Standard Test Method for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Method)
Effective Date
01-Feb-2011

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ASTM D2688-05 - Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)ASTM D2688-05 - Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)
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ASTM D2688-05 - Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Weight Loss Methods)
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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
Designation:D2688–05
Standard Test Method for
Corrosivity of Water in the Absence of Heat Transfer
1
(Weight Loss Method)
This standard is issued under the fixed designation D2688; 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.
1. Scope G16 Guide forApplying Statistics toAnalysis of Corrosion
Data
1.1 This test method covers the determination of the corro-
sivity of water by evaluating pitting and by measuring the
3. Terminology
weight loss of metal specimens. Pitting is a form of localized
3.1 Definitions: For definitions of terms used in these test
corrosion: weight loss is a measure of the average corrosion
methods, refer to Terminology D1129.
rate. The rate of corrosion of a metal immersed in water is a
function of the tendency for the metal to corrode and is also a
4. Significance and Use
function of the tendency for water and the materials it contains
4.1 Since the two tendencies are inseparable for a metal to
to promote (or inhibit) corrosion.
corrode and for water and the materials it contains to promote
1.2 The test method employs flat, rectangular-shaped metal
or inhibit corrosion, the corrosiveness of a material or the
coupons which are mounted on pipe plugs and exposed to the
corrosivity of water must be determined in relative, rather than
water flowing in metal piping in municipal, building, and
absolute, terms. The tendency for a material to corrode is
industrial water systems using a side stream corrosion speci-
normally determined by measuring its rate of corrosion and
men rack.
comparing it with the corrosion rates of other materials in the
1.3 This standard does not purport to address all of the
same water environment. Conversely, the relative corrosivity
safety concerns, if any, associated with its use. It is the
ofwatermaybedeterminedbycomparingthecorrosionrateof
responsibility of the user of this standard to establish appro-
a material in the water with the corrosion rates of the same
priate safety and health practices and determine the applica-
material in other waters. Such tests are useful, for example, for
bility of regulatory limitations prior to use.
evaluating the effects of corrosion inhibitors on the corrosivity
of water. Although this test methods is intended to determine
2. Referenced Documents
2 the corrosivity of water, it is equally useful for determining
2.1 ASTM Standards:
corrosiveness and corrosion rate of materials. Examples of
D1129 Terminology Relating to Water
systems in which this method may be used include but are not
D2331 Practices for Preparation and Preliminary Testing of
limited to open recirculating cooling water and closed chilled
Water-Formed Deposits
and hydronic heating systems.
D2777 Practice for Determination of Precision and Bias of
Applicable Test Methods of Committee D19 on Water
5. Composition of Specimens
G1 Practice for Preparing, Cleaning, and Evaluating Corro-
5.1 The specimens shall be similar in composition to the
sion Test Specimens
piping in the system in which the corrosion test is being made.
6. Effect of Cold Working on Corrosion
1
This test method is under the jurisdiction of ASTM Committee D19 on Water
and is the direct responsibility of Subcommittee D19.03 on Sampling of Water and
6.1 Cold working can be important in causing localized
Water-Formed Deposits, Analysis of Water for Power Generation and Process Use,
corrosion; however, plastic deformation can be minimized in
On-Line Water Analysis, and Surveillance of Water.
specimen preparation by following proper machining practices
Current edition approved Jan. 1, 2005. Published January 2005. Originally
´1
approved in 1969. Last previous edition approved in 1999 as D2688 – 94 (1999) . (1) (for example, drilling, reaming, and cutting specimens).
DOI: 10.1520/D2688-05.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7. Types of Corrosion
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 General Corrosion is characterized by uniform attack
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. of the metal over the entire surface.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D2688–05
7.2 Pitting is a form of localized corrosion, the depth, 10.5 Crevices, deposits, or biological growths may affect
number, size, shape, and distribution of pits being pertinent local corrosivity; results should therefore be interpreted with
characteristics.Itmaybeevaluatedbycou
...

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1.1 This test method covers the in-situ field measurements of turbidity in surface water. The measurement range is greater than 1 TU and the lesser of 10 000 TU or the maximum measurable TU value specified by the turbidimeter manufacturer.  
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ment  
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1.1 These practices provide directions for the preparation of the sample for analysis, the preliminary examination of the sample, and methods for dissolving the analytical sample or selectively separating constituents of concern.  
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Sections  
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8  
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5.1 Fe-55 is formed in reactor coolant systems of nuclear reactors by activation of stable iron. The 55Fe is not completely removed by waste processing systems and some is released to the environment by means of normal waste liquid discharges. Power plants are required to monitor these discharges for 55Fe as well as other radionuclides.  
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SCOPE
1.1 This test method covers the determination of 55Fe in the presence of 59Fe by liquid scintillation counting. The a-priori minimum detectable concentration for this test method is 7.4 Bq/L.2  
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SCOPE
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