ASTM G119-03
(Guide)Standard Guide for Determining Synergism Between Wear and Corrosion
Standard Guide for Determining Synergism Between Wear and Corrosion
SCOPE
1.1 This guide provides a means for computing the increased wear loss rate attributed to synergism or interaction that may occur in a system when both wear and corrosion processes coexist. The guide applies to systems in liquid solutions or slurries and does not include processes in a gas/solid system.
1.2 This guide applies to metallic materials and can be used in a generic sense with a number of wear/corrosion tests. It is not restricted to use with approved ASTM test methods.
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.
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Designation: G 119 – 03
Standard Guide for
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Determining Synergism Between Wear and Corrosion
This standard is issued under the fixed designation G 119; 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.
1. Scope 3.2.1 cathodic protection current density, i —The electri-
cp
cal current density needed during the wear/corrosion experi-
1.1 This guide provides a means for computing the in-
ment to maintain the specimen at a potential which is 1 volt
creased wear loss rate attributed to synergism or interaction
cathodic to the open circuit potential.
that may occur in a system when both wear and corrosion
3.2.2 corrosion current density, i —The corrosion current
cor
processes coexist. The guide applies to systems in liquid
density measured by electrochemical techniques, as described
solutions or slurries and does not include processes in a
in Practice G 102.
gas/solid system.
3.2.3 electrochemical corrosion rate, C—The electrochemi-
1.2 This guide applies to metallic materials and can be used
cal corrosion rate as determined by Practice G 59 and con-
in a generic sense with a number of wear/corrosion tests. It is
verted to a penetration rate in accordance with Practice G 102.
not restricted to use with approved ASTM test methods.
This penetration rate is equivalent to the volume loss rate per
1.3 This standard does not purport to address all of the
area. The term C is the electrochemical corrosion rate during
w
safety concerns, if any, associated with its use. It is the
the corrosive wear process, and the term C designates the
0
responsibility of the user of this standard to establish appro-
electrochemical corrosion rate when no mechanical wear is
priate safety and health practices and determine the applica-
allowed to take place.
bility of regulatory limitations prior to use.
3.2.4 mechanical wear rate, W —The rate of material loss
0
2. Referenced Documents
from a specimen when the electrochemical corrosion rate has
been eliminated by cathodic protection during the wear test.
2.1 ASTM Standards:
3.2.5 total material loss rate, T—The rate of material loss
G 3 Practice for Conventions Applicable to Electrochemical
2
from a specimen exposed to the specified conditions, including
Measurements in Corrosion Testing
contributions from mechanical wear, corrosion, and interac-
G 5 Reference Test Method for Making Potentiostatic and
2
tions between these two.
Potentiodynamic Anodic Polarization Measurements
3.2.6 wear/corrosion —Interaction, that is, the change in
G 15 Terminology Relating to Corrosion and Corrosion
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material wastage resulting from the interaction between wear
Testing
2
and corrosion, that is, T minus W and C . This can be
G 40 Terminology Relating to Wear and Erosion o o
sub-divided into DC , the change of the electrochemical
G 59 Practice for Conducting Potentiodynamic Polarization w
2
corrosion rate due to wear and DW , the change in mechanical
Resistance Measurements c
wear due to corrosion.
G 102 Practice for Calculation of Corrosion Rates and
2
Related Information from Electrochemical Measurements
4. Summary of Guide
3. Terminology
4.1 A wear test is carried out under the test conditions of
interest and T is measured.
3.1 Definitions—For general definitions relating to corro-
4.2 Additional experiments are conducted to isolate the
sion see Terminology G 15. For definitions relating to wear see
mechanical and corrosion components of the corrosive wear
Terminology G 40.
process. These are as follows:
3.2 Definitions of Terms Specific to This Standard:
4.2.1 A repeat of the experiment in 4.1 with measurement of
C ,
w
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This guide is under the jurisdiction of ASTM Committee G02 on Wear and
4.2.2 A test identical to the initial experiment in 4.1, except
Erosion and is the direct responsibility of Subcommittee G02.40 on Non-Abrasive
that cathodic protection is used to obtain W , and
0
Wear.
4.2.3 Measurement of C , the corrosion rate in the absence
0
Current edition approved May 10, 2003. Published June 2003. Originally
approved in 1993. Last previous edition approved in 1998 as G 119–93 (1998). of mechanical wear.
2
Annual Book of ASTM Standards, Vol 03.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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G119–03
4.3 DC and DW are calculated from the values measured converted to a penetration rate in accordance to Practice G 102.
w c
in the experiments described in 4.1 and 4.2. This penetration rate is equivalent to the material loss rate, C .
w
6.3 A wear test similar to th
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