ASTM D6676-01e1
(Test Method)Standard Test Method for Cathodic Disbonding of Exterior Pipeline Coatings at Elevated Temperatures Using Interior Heating (Withdrawn 2010)
Standard Test Method for Cathodic Disbonding of Exterior Pipeline Coatings at Elevated Temperatures Using Interior Heating (Withdrawn 2010)
SCOPE
1.1 This test method describes an accelerated procedure for determining comparative characteristics of coating systems applied to the exterior of steel pipe for the purpose of preventing or mitigating corrosion that may occur in underground or immersion where the pipe is carrying heated media and is under cathodic protection. This test method is intended for use with samples of coated pipe, or with a specimen cut from the section of coated pipe or flat plates, and is applicable to such samples when the coating is characterized by function as an electrical barrier.
1.2 This test method is intended to simulate conditions when external coatings are exposed to high temperature inside the pipe and to an ambient temperature outside, and thus are subjected to temperature gradient. If elevated temperatures are not required, see Test Method G8. If a specific test method is required with no options, see Test Method G80. If elevated temperatures are required but without temperature gradient, see Test Method G42.
1.3 The values stated in SI units to three significant decimals are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.
WITHDRAWN RATIONALE
This test method describes an accelerated procedure for determining comparative characteristics of coating systems applied to the exterior of steel pipe for the purpose of preventing or mitigating corrosion that may occur in underground or immersion where the pipe is carrying heated media and is under cathodic protection. This test method is intended for use with samples of coated pipe, or with a specimen cut from the section of coated pipe or flat plates, and is applicable to such samples when the coating is characterized by function as an electrical barrier.
Formerly under the jurisdiction of Committee D01 on Paint and Related Coatings, Materials, and Applicaitons, this test method was withdrawn in January 2010 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
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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.
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Designation:D6676–01
Standard Test Method for
Cathodic Disbonding of Exterior Pipeline Coatings at
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Elevated Temperatures Using Interior Heating
This standard is issued under the fixed designation D6676; 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.
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´ NOTE—Editorial changes were made throughout in October 2001.
1. Scope G12 Test Method for Nondestructive Measurement of Film
Thickness of Pipeline Coatings on Steel
1.1 This test method describes an accelerated procedure for
G42 Test Method for Cathodic Disbonding of Pipeline
determining comparative characteristics of coating systems
Coatings Subjected to Elevated Temperatures
applied to the exterior of steel pipe for the purpose of
G62 Test Methods for Holiday Detection in Pipeline Coat-
preventing or mitigating corrosion that may occur in under-
ings
ground or immersion where the pipe is carrying heated media
G80 Test Method for Specific Cathodic Disbonding of
and is under cathodic protection. This test method is intended
Pipeline Coatings
for use with samples of coated pipe, or with a specimen cut
G95 Test Method for Cathodic Disbondment Test of Pipe-
from the section of coated pipe or flat plates, and is applicable
line Coatings (Attached Cell Method)
to such samples when the coating is characterized by function
as an electrical barrier.
3. Summary of Test Method
1.2 This test method is intended to simulate conditions
3.1 The test method described, subjects the coating on the
when external coatings are exposed to high temperature inside
testspecimentoelectricalstressinahighlyconductivealkaline
the pipe and to an ambient temperature outside, and thus are
electrolyte. Electrical stress is obtained from an impressed
subjected to temperature gradient. If elevated temperatures are
direct- current system. An intentional holiday is to be made in
not required, see Test Method G8. If a specific test method is
the coating prior to starting of test.
required with no options, see Test Method G80. If elevated
3.1.1 Electrical instrumentation is provided for measuring
temperaturesarerequiredbutwithouttemperaturegradient,see
the current and the potential throughout the test cycle. At the
Test Method G42.
conclusion of the test period, the test specimen is physically
1.3 The values stated in SI units to three significant deci-
examined.
mals are to be regarded as the standard. The values given in
3.1.2 Physical examination is conducted by comparing the
parentheses are for information only.
extent of loosened or disbonded coating at the intentional
1.4 This standard does not purport to address all of the
holiday in the immersed area with extent of loosened or
safety concerns, if any, associated with its use. It is the
disbonded coating at a reference holiday made in the coating in
responsibility of the user of this standard to establish appro-
an area that was not immersed.
priate safety and health practices and determine the applica-
3.1.3 The cathodic stress is applied under conditions of a
bility of regulatory limitations prior to use.
constant temperature gradient, simulating a heated pipeline
2. Referenced Documents with an exterior coating.
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3.1.4 Specimens that can be used are: (a) piece of pipe (Fig.
2.1 ASTM Standards:
1)or(b) samples cut from pipe or flat plate (Fig. 2 and Fig. 3).
G8 Test Methods for Cathodic Disbonding of Pipeline
3.1.4.1 Some coatings rely on application tension (such as
Coatings
tape) for maximum cathodic disbondment resistance. Cut
coupons or flat plates must not be used.
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This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
4. Significance and Use
Subcommittee D01.48 on Durability of Pipeline Coating and Linings.
4.1 Damage to a pipe coating is almost unavoidable during
Current edition approved Oct. 1, 2001. Published July 2001. DOI: 10.1520/
D6676-01E01.
transportation and construction. Breaks or holidays in pipe
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
coatings may expose the pipe to possible corrosion since, after
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
a pipe has been installed underground, the surrounding earth
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. will be moisture-bearing and will constitute an effective
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D6676–01
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