ASTM E745-80(2009)
(Practice)Standard Practices for Simulated Service Testing for Corrosion of Metallic Containment Materials for Use With Heat-Transfer Fluids in Solar Heating and Cooling Systems (Withdrawn 2018)
Standard Practices for Simulated Service Testing for Corrosion of Metallic Containment Materials for Use With Heat-Transfer Fluids in Solar Heating and Cooling Systems (Withdrawn 2018)
SIGNIFICANCE AND USE
At this time none of these practices have been demonstrated to correlate with field service.
Because these procedures do not restrict the selection of either the containment material or the fluid for testing, it is essential that consideration be given to the appropriate pairing of metal and fluid. Likewise, knowledge of the corrosion protection mechanism and the probable mode of failure of a particular metal is helpful in the selection of test conditions and the observation, interpretation, and reporting of test results.
It is important that consideration be given to each of the permitted variables in test procedure so that the results will be meaningfully related to field performance. It is especially important that the time of testing selected be adequate to correctly measure the rate of corrosion of the containment material.
Note 1—Corrosion, whether general or localized, is a time-dependent phenomenon. This time dependence can show substantial nonlinearity. For example, formation of a protective oxide will diminish corrosion with time, while certain forms of localized attack accelerate corrosion with time. The minimum time required for a test to provide a corrosion rate that can be extrapolated for the prediction of long-term performance varies widely, depending on the selection of metal and fluid, and on the form of corrosion attack. Therefore, it is not possible to establish a single minimum length of test applicable to all materials and conditions. However, it is recommended that for the tests described in these practices, a test period of no less than 6 months be used. Furthermore, it is recommended that the effect of time of testing be evaluated to detect any significant time dependence of corrosion attack.
It is essential for the meaningful application of these procedures that the length of test be adequate to detect changes in the nature of the fluid that might significantly alter the corrosivity of the fluid. For example, exhaustion of chemica...
SCOPE
1.1 These practices cover test procedures simulating field service for evaluating the performance under corrosive conditions of metallic containment materials in solar heating and cooling systems. All test results relate to the performance of the metallic containment material only as a part of a metal/fluid pair. Performance in these test procedures, taken by itself, does not necessarily constitute an adequate basis for acceptance or rejection of a particular metal/fluid pair in solar heating and cooling systems, either in general or in a particular design.
1.2 These practices describe test procedures used to evaluate the resistance to deterioration of metallic containment materials in the several conditions that may occur in operation of solar heating and cooling systems. These conditions include: (1) operating full flow; (2) stagnant empty vented; (3) stagnant, closed to atmosphere, non-draindown; and (4) stagnant, closed to atmosphere, draindown.
1.3 The recommended practices cover the following three tests:
1.3.1 Practice A—Laboratory Exposure Test for Coupon Specimens.
1.3.2 Practice B—Laboratory Exposure Test of Components or Subcomponents.
1.3.3 Practice C—Field Exposure Test of Components or Subcomponents.
1.4 Practice A provides a laboratory simulation of various operating conditions of solar heating and cooling systems. It utilizes coupon test specimens and does not provide for heating of the fluid by the containment material. Practice B provides a laboratory simulation of various operating conditions of a solar heating and cooling system utilizing a component or a simulated subcomponent construction, and does provide for heating of the fluid by the containment material. Practice C provides a field simulation of various operating conditions of solar heating and cooling systems utilizing a component or a simulated subcomponent construction. It utilizes controlled schedules of operation in a field tes...
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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: E745 − 80 (Reapproved 2009)
Standard Practices for
Simulated Service Testing for Corrosion of Metallic
Containment Materials for Use With Heat-Transfer Fluids in
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Solar Heating and Cooling Systems
This standard is issued under the fixed designation E745; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope fieldsimulationofvariousoperatingconditionsofsolarheating
and cooling systems utilizing a component or a simulated
1.1 These practices cover test procedures simulating field
subcomponent construction. It utilizes controlled schedules of
service for evaluating the performance under corrosive condi-
operation in a field test.
tions of metallic containment materials in solar heating and
coolingsystems.Alltestresultsrelatetotheperformanceofthe 1.5 The values stated in inch-pound units are to be regarded
metallic containment material only as a part of a metal/fluid as standard. The values given in parentheses are mathematical
pair.Performanceinthesetestprocedures,takenbyitself,does conversions to SI units that are provided for information only
not necessarily constitute an adequate basis for acceptance or and are not considered standard.
rejection of a particular metal/fluid pair in solar heating and
1.6 This standard does not purport to address all of the
cooling systems, either in general or in a particular design.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
1.2 These practices describe test procedures used to evalu-
priate safety and health practices and determine the applica-
ate the resistance to deterioration of metallic containment
bility of regulatory limitations prior to use.Foraspecificsafety
materials in the several conditions that may occur in operation
precaution statement see Section 6.
ofsolarheatingandcoolingsystems.Theseconditionsinclude:
(1)operatingfullflow;(2)stagnantemptyvented;(3)stagnant,
2. Referenced Documents
closed to atmosphere, non-draindown; and (4) stagnant, closed
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to atmosphere, draindown. 2.1 ASTM Standards:
E712PracticeforLaboratoryScreeningofMetallicContain-
1.3 The recommended practices cover the following three
ment Materials for UseWith Liquids in Solar Heating and
tests:
Cooling Systems
1.3.1 Practice A—Laboratory Exposure Test for Coupon
Specimens.
3. Terminology
1.3.2 Practice B—LaboratoryExposureTestofComponents
3.1 Definitions:
or Subcomponents.
3.1.1 collector, n—a device designed to absorb incident
1.3.3 Practice C—Field Exposure Test of Components or
solar radiation and transfer the energy to a heat-transfer fluid.
Subcomponents.
Acollector has an absorber surface, a containment membrane,
1.4 Practice A provides a laboratory simulation of various
and may or may not have insulation and glazing.
operating conditions of solar heating and cooling systems. It
3.1.2 component, n—an individually distinguishable prod-
utilizescoupontestspecimensanddoesnotprovideforheating
uct that forms part of a more complex product, that is, a
of the fluid by the containment material. Practice B provides a
subsystem or system. The panel and collector are each com-
laboratorysimulationofvariousoperatingconditionsofasolar
ponents.
heating and cooling system utilizing a component or a simu-
3.1.3 panel, n—the absorber surface and containment mem-
lated subcomponent construction, and does provide for heating
of the fluid by the containment material. Practice C provides a brane within the collector.
3.1.4 simulated subcomponent, n—a specimen fabricated in
such a manner as to embody the major characteristics of a
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These practices are under the jurisdiction of ASTM Committee E44 on Solar,
GeothermalandOtherAlternativeEnergySourcesandisthedirectresponsibilityof
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Subcommittee E44.05 on Solar Heating and Cooling Systems and Materials. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved April 1, 2009. Published June 2009. Origianlly contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1980. Last previous edition approved in 2003 as E745–80(2003). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E0745-80R09. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E745 − 80 (2009)
component with regard to material selection, design, forming, 6. Safety Precautions
joining, and surface condition.
6.1 Particular attention must be directed to avoidance o
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