ASTM C1617-18a
(Practice)Standard Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from Thermal Insulation on Aqueous Corrosion of Metals
Standard Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from Thermal Insulation on Aqueous Corrosion of Metals
SIGNIFICANCE AND USE
5.1 Corrosion associated with insulation is an important concern for insulation manufacturers, specification writers, designers, contractors, users and operators of the equipment. Some material specifications contain test methods (or reference test methods contained in other material specifications), for use in evaluating the insulation with regard to the corrosion of steel, copper, and aluminum. In some cases these tests are not applicable or effective and have not been evaluated for precision and bias.
5.2 A properly selected, installed, and maintained insulation system will reduce the corrosion that often occurs on an un-insulated structure. However, when the protective weather-resistant covering of an insulation system fails, the conditions for the aqueous environment necessary for corrosion under insulation (CUI) often develop. It is possible the insulation contains, collects, or concentrates corrosive agents, or a combination thereof, often found in industrial and coastal environments. If water is not present, these electrolytes cannot migrate to the metal surface. The electrochemical reaction resulting in the aqueous corrosion of metal surfaces cannot take place in the absence of water and electrolytes. Additional environmental factors contributing to increased corrosion rates are oxygen, and elevated-temperature (near boiling point).
5.3 Chlorides and other corrosive ions are common to many environments. The primary corrosion preventative is to protect insulation and metal from contamination and moisture. Insulation covers, jackets, and metal coating of various kinds are often used to prevent water infiltration and contact with the metal.
5.4 This procedure can be used to evaluate all types of thermal insulation and fireproofing materials (industrial, commercial, residential, cryogenic, fire-resistive, insulating cement) manufactured using inorganic or organic materials, faced or unfaced, for which a filtered extraction solution can be obtained.
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SCOPE
1.1 This practice covers procedures for a quantitative accelerated laboratory evaluation of the influence of extraction solutions containing ions leached from thermal insulation on the aqueous corrosion of metals. The primary intent of the practice is for use with thermal insulation and associated materials that contribute to, or alternatively inhibit, the aqueous corrosion of different types and grades of metals due to soluble ions that are leached by water from within the insulation. The quantitative evaluation criteria are Mass Loss Corrosion Rate (MLCR) expressed in mils per year determined from the weight loss due to corrosion of exposed metal coupons after they are cleaned.
1.2 The insulation extraction solutions prepared for use in the test can be altered by the addition of corrosive ions to the solutions to simulate contamination from an external source. Ions expected to provide corrosion inhibition can be added to investigate their inhibitory effect.
1.3 Prepared laboratory ionic solutions are used as reference solutions and controls, to provide a means of calibration and comparison. See Fig. 1 and Table 1.
1.4 Other liquids can be tested for their potential corrosiveness including cooling tower water, boiler feed, and chemical stocks. Added chemical inhibitors or protective coatings applied to the metal can also be evaluated using the general guidelines of the practice.
1.5 This practice cannot cover all possible field conditions that contribute to aqueous corrosion. The intent is to provide an accelerated means to obtain a non-subjective numeric value for judging the potential contribution to the corrosion of metals that can come from ions contained in thermal insulation materials or other experimental solutions. The calculated numeric value is the mass loss corrosion rate. This calculation is based on general corrosion spread equally over the test duration and the exposed area of the experimental...
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Designation: C1617 − 18a
Standard Practice for
Quantitative Accelerated Laboratory Evaluation of
Extraction Solutions Containing Ions Leached from Thermal
1
Insulation on Aqueous Corrosion of Metals
This standard is issued under the fixed designation C1617; 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 is based on general corrosion spread equally over the test
durationandtheexposedareaoftheexperimentalcellscreated
1.1 This practice covers procedures for a quantitative accel-
for the test. Corrosion found in field situations and this
erated laboratory evaluation of the influence of extraction
accelerated test also involves pitting and edge effects and the
solutions containing ions leached from thermal insulation on
rate changes over time.
the aqueous corrosion of metals. The primary intent of the
practice is for use with thermal insulation and associated 1.6 Thevaluesstatedininch-poundunitsaretoberegarded
materialsthatcontributeto,oralternativelyinhibit,theaqueous as standard. The values given in parentheses are mathematical
corrosionofdifferenttypesandgradesofmetalsduetosoluble conversions to SI units that are provided for information only
ions that are leached by water from within the insulation. The and are not considered standard.
quantitative evaluation criteria are Mass Loss Corrosion Rate
1.7 This standard does not purport to address all of the
(MLCR) expressed in mils per year determined from the
safety concerns, if any, associated with its use. It is the
weight loss due to corrosion of exposed metal coupons after
responsibility of the user of this standard to establish appro-
they are cleaned.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.2 The insulation extraction solutions prepared for use in
1.8 This international standard was developed in accor-
the test can be altered by the addition of corrosive ions to the
dance with internationally recognized principles on standard-
solutions to simulate contamination from an external source.
ization established in the Decision on Principles for the
Ions expected to provide corrosion inhibition can be added to
Development of International Standards, Guides and Recom-
investigate their inhibitory effect.
mendations issued by the World Trade Organization Technical
1.3 Preparedlaboratoryionicsolutionsareusedasreference
Barriers to Trade (TBT) Committee.
solutions and controls, to provide a means of calibration and
comparison. See Fig. 1 and Table 1.
2. Referenced Documents
2
1.4 Other liquids can be tested for their potential corrosive-
2.1 ASTM Standards:
ness including cooling tower water, boiler feed, and chemical
A53/A53MSpecification for Pipe, Steel, Black and Hot-
stocks. Added chemical inhibitors or protective coatings ap-
Dipped, Zinc-Coated, Welded and Seamless
plied to the metal can also be evaluated using the general
A105/A105MSpecification for Carbon Steel Forgings for
guidelines of the practice.
Piping Applications
1.5 This practice cannot cover all possible field conditions C168Terminology Relating to Thermal Insulation
C518Test Method for Steady-State Thermal Transmission
thatcontributetoaqueouscorrosion.Theintentistoprovidean
acceleratedmeanstoobtainanon-subjectivenumericvaluefor Properties by Means of the Heat Flow Meter Apparatus
C665SpecificationforMineral-FiberBlanketThermalInsu-
judging the potential contribution to the corrosion of metals
that can come from ions contained in thermal insulation lation for Light Frame Construction and Manufactured
Housing
materials or other experimental solutions. The calculated
numeric value is the mass loss corrosion rate. This calculation C692Test Method for Evaluating the Influence of Thermal
Insulations on External Stress Corrosion Cracking Ten-
dency of Austenitic Stainless Steel
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
InsulationandisthedirectresponsibilityofSubcommitteeC16.31onChemicaland
2
Physical Properties. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2018. Published October 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2005. Last previous edition approved in 2018 as C1617–18. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1617-18A. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C1617 − 18 C1617 − 18a
Standard Practice for
Quantitative Accelerated Laboratory Evaluation of
Extraction Solutions Containing Ions Leached from Thermal
1
Insulation on Aqueous Corrosion of Metals
This standard is issued under the fixed designation C1617; 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
1.1 This practice covers procedures for a quantitative accelerated laboratory evaluation of the influence of extraction solutions
containing ions leached from thermal insulation on the aqueous corrosion of metals. The primary intent of the practice is for use
with thermal insulation and associated materials that contribute to, or alternatively inhibit, the aqueous corrosion of different types
and grades of metals due to soluble ions that are leached by water from within the insulation. The quantitative evaluation criteria
are Mass Loss Corrosion Rate (MLCR) expressed in mils per year determined from the weight loss due to corrosion of exposed
metal coupons after they are cleaned.
1.2 The insulation extraction solutions prepared for use in the test can be altered by the addition of corrosive ions to the solutions
to simulate contamination from an external source. Ions expected to provide corrosion inhibition can be added to investigate their
inhibitory effect.
1.3 Prepared laboratory standardionic solutions are used as reference solutions and controls, to provide a means of calibration
and comparison. See Fig. 1 and Table 1.
1.4 Other liquids can be tested for their potential corrosiveness including cooling tower water, boiler feed, and chemical stocks.
Added chemical inhibitors or protective coatings applied to the metal can also be evaluated using the general guidelines of the
practice.
1.5 This practice cannot cover all possible field conditions that contribute to aqueous corrosion. The intent is to provide an
accelerated means to obtain a non-subjective numeric value for judging the potential contribution to the corrosion of metals that
can come from ions contained in thermal insulation materials or other experimental solutions. The calculated numeric value is the
mass loss corrosion rate. This calculation is based on general corrosion spread equally over the test duration and the exposed area
of the experimental cells created for the test. Corrosion found in field situations and this accelerated test also involves pitting and
edge effects and the rate changes over time.
1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.7 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.8 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A53/A53M Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.31 on Chemical and Physical
Properties.
Current edition approved May 15, 2018Sept. 1, 2018. Published July 2018October 2018. Originally approved in 2005. Last previous edition approved in 20152018 as
C1617 – 15.C1617 – 18. DOI: 10.1520/C1617-18.10.1520/C1617-18A.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 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
1
---------------------- Page: 1 ----------------------
C1617 − 18a
NOTE 1—The Fig. 1 bar graph was created using the
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