ASTM G119-04

Standard Guide for Determining Synergism Between Wear and Corrosion

SIGNIFICANCE AND USE
Wear and corrosion can involve a number of mechanical and chemical processes. The combined action of these processes can result in significant mutual interaction beyond the individual contributions of mechanical wear and corrosion (1-5).3 This interaction among abrasion, rubbing, impact and corrosion can significantly increase total material losses in aqueous environments, thus producing a synergistic effect. Reduction of either the corrosion or the wear component of material loss may significantly reduce the total material loss. A practical example may be a stainless steel that has excellent corrosion resistance in the absence of mechanical abrasion, but readily wears and corrodes when abrasive particles remove its corrosion-resistant passive film. Quantification of wear/corrosion synergism can help guide the user to the best means of lowering overall material loss. The procedures outlined in this guide cannot be used for systems in which any corrosion products such as oxides are left on the surface after a test, resulting in a possible weight gain.
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.
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: 30-Apr-2004
• ICS: 77.060 - Corrosion of metals
• Technical Committee: G02 - Wear and Erosion
• Drafting Committee: G02.40 - Non-Abrasive Wear

Relations

• Replaces: ASTM G119-03 - Standard Guide for Determining Synergism Between Wear and Corrosion
• Effective Date: 01-May-2004
• Replaced By: ASTM G119-09 - Standard Guide for Determining Synergism Between Wear and Corrosion
• Effective Date: 15-Jul-2009
• Referred By: ASTM G32-16(2021)e1 - Standard Test Method for Cavitation Erosion Using Vibratory Apparatus
• Effective Date: 01-May-2004

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:G119–04
Standard Guide for
1
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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.2 Definitions of Terms Specific to This Standard:
3.2.1 cathodic protection current density, i —The electri-
1.1 This guide provides a means for computing the in- cp
cal current density needed during the wear/corrosion experi-
creased wear loss rate attributed to synergism or interaction
ment to maintain the specimen at a potential which is one volt
that may occur in a system when both wear and corrosion
cathodic to the open circuit potential.
processes coexist. The guide applies to systems in liquid
3.2.2 corrosion current density, i —The corrosion current
solutions or slurries and does not include processes in a cor
density measured by electrochemical techniques, as described
gas/solid system.
in Practice G 102.
1.2 This guide applies to metallic materials and can be used
3.2.3 electrochemical corrosion rate, C—The electrochemi-
in a generic sense with a number of wear/corrosion tests. It is
cal corrosion rate as determined by Practice G59 and con-
not restricted to use with approved ASTM test methods.
verted to a penetration rate in accordance with Practice G 102.
1.3 This standard does not purport to address all of the
This penetration rate is equivalent to the volume loss rate per
safety concerns, if any, associated with its use. It is the
area. The term C is the electrochemical corrosion rate during
w
responsibility of the user of this standard to establish appro-
the corrosive wear process, and the term C designates the
0
priate safety and health practices and determine the applica-
electrochemical corrosion rate when no mechanical wear is
bility of regulatory limitations prior to use.
allowed to take place.
2. Referenced Documents
3.2.4 mechanical wear rate, W —The rate of material loss
0
from a specimen when the electrochemical corrosion rate has
2.1 ASTM Standards:
been eliminated by cathodic protection during the wear test.
G3 PracticeforConventionsApplicabletoElectrochemical
2
3.2.5 total material loss rate, T—The rate of material loss
Measurements in Corrosion Testing
from a specimen exposed to the specified conditions, including
G5 Reference Test Method for Making Potentiostatic and
2
contributions from mechanical wear, corrosion, and interac-
Potentiodynamic Anodic Polarization Measurements
tions between these two.
G15 Terminology Relating to Corrosion and Corrosion
2
3.2.6 wear/corrosion interaction—the change in material
Testing
2
wastage resulting from the interaction between wear and
G40 Terminology Relating to Wear and Erosion
corrosion, that is, T minus W and C . This can be sub-divided
G59 Practice for Conducting Potentiodynamic Polarization o o
2
into DC , the change of the electrochemical corrosion rate due
Resistance Measurements w
to wear and DW , the change in mechanical wear due to
G 102 Practice for Calculation of Corrosion Rates and c
2
corrosion.
Related Information from Electrochemical Measurements
4. Summary of Guide
3. Terminology
4.1 A wear test is carried out under the test conditions of
3.1 Definitions—For general definitions relating to corro-
interest and T is measured.
sion seeTerminologyG15. For definitions relating to wear see
4.2 Additional experiments are conducted to isolate the
TerminologyG40.
mechanical and corrosion components of the corrosive wear
process. These are as follows:
1
This guide is under the jurisdiction of ASTM Committee G02 on Wear and
4.2.1 Arepeatoftheexperimentin4.1withmeasurementof
Erosion and is the direct responsibility of Subcommittee G02.40 on Non-Abrasive
C ,
w
Wear.
4.2.2 Atest identical to the initial experiment in 4.1, except
Current edition approved May 1, 2004. Published May 2004. Originally
approved in 1993. Last previous edition approved in 2003 as G 119 – 03 .
that cathodic protection is used to obtain W , and
0
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.2.3 Measurement of C , the corrosion rate in the absence
0
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
of mechanical wear.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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G119–04
4.3 DC and DW are calculated from the values measured convertedtoapenetrationrateinaccordancetoPracticeG 102.
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