ASTM D1275-24
(Test Method)Standard Test Method for Corrosive Sulfur in Electrical Insulating Liquids
Standard Test Method for Corrosive Sulfur in Electrical Insulating Liquids
SIGNIFICANCE AND USE
3.1 In most of their uses, insulating liquids are continually in contact with metals that are subject to corrosion. The presence of elemental sulfur or corrosive sulfur compounds will result in deterioration of these metals and cause conductive or high resistive films to form. The extent of deterioration is dependent upon the quantity and type of corrosive agent and time and temperature factors. Detection of these undesirable impurities, even though not in terms of quantitative values, is a means for recognizing the hazard involved.
3.2 Two methods are provided, one for copper corrosion and one for silver corrosion. Copper is slightly less sensitive to sulfur corrosion than silver but the results are easier to interpret and less prone to error. The silver corrosion procedure is provided especially for those users who have applications where the insulating liquid is in contact with a silver surface.
SCOPE
1.1 This test method describes the detection of corrosive sulfur compounds (both inorganic and organic) in electrical insulating liquids.
1.2 New and in-service insulating liquids may contain elemental sulfur or sulfur compounds, or both, that cause corrosion under certain conditions of use. This test method is designed to detect the presence of, or the propensity to form, free (elemental) sulfur and corrosive sulfur compounds by subjecting copper or silver to contact with an insulating liquid under prescribed conditions.
1.3 The values stated in SI units are to be regarded as the standard. Inch-pound units are included for informational purposes.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
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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.
Designation: D1275 − 24
315/98
Standard Test Method for
1
Corrosive Sulfur in Electrical Insulating Liquids
This standard is issued under the fixed designation D1275; 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.
This standard has been adopted for use by government agencies to replace Method 5328-2 of Federal Test Method Standard No. 791b.
This standard was adopted as an ASTM-IP Standard.
This standard has been approved for use by agencies of the U.S. Department of Defense.
INTRODUCTION
Prior to 2006, this test method existed as a singular method in which the main aging parameters of
the test specimen were 19 h at 140 °C. In 2006, it was determined that those parameters were
inadequate (not sensitive enough to detect all levels of corrosive sulfur) and Method B was instituted
in which the main aging parameters were 48 h at 150 °C. The old parameters were kept as Method A
to avoid any confusion. The 2015 edition of this test method for the copper corrosion procedure reverts
back to a singular method in which the main aging parameters are the same as the previous Method
B (2006-2014). Results from the current test method cannot be compared or correlated to the method
prior to 2006 and only to Method B from 2006 to 2014.
1. Scope 1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This test method describes the detection of corrosive
ization established in the Decision on Principles for the
sulfur compounds (both inorganic and organic) in electrical
Development of International Standards, Guides and Recom-
insulating liquids.
mendations issued by the World Trade Organization Technical
1.2 New and in-service insulating liquids may contain
Barriers to Trade (TBT) Committee.
elemental sulfur or sulfur compounds, or both, that cause
corrosion under certain conditions of use. This test method is
2. Referenced Documents
designed to detect the presence of, or the propensity to form,
2
2.1 ASTM Standards:
free (elemental) sulfur and corrosive sulfur compounds by
D130 Test Method for Corrosiveness to Copper from Petro-
subjecting copper or silver to contact with an insulating liquid
leum Products by Copper Strip Test
under prescribed conditions.
D923 Practices for Sampling Electrical Insulating Liquids
1.3 The values stated in SI units are to be regarded as the E11 Specification for Woven Wire Test Sieve Cloth and Test
standard. Inch-pound units are included for informational Sieves
purposes.
2.2 Other Document:
3
ANSI B74.10 Grading of Abrasive Microgrits
1.4 This standard does not purport to address all of the
DIN 51 353 Testing of Insulating Oils; detection of corrosive
safety concerns, if any, associated with its use. It is the
4
sulfur, silver strip test
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
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
1
This test method is under the jurisdiction of ASTM Committee D27 on the ASTM website.
3
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom- Available from American National Standards Institute, 25 W. 43rd St., 4th
mittee D27.06 on Chemical Test. Floor, New York, NY 10036, USA.
4
Current edition approved Jan. 15, 2024. Published February 2024. Originally Available from Deutsches Institut für Normung e.V.(DIN), Am DIN-Platz,
approved in 1953. Last previous edition approved in 2015 as D1275 – 15. DOI: Burggrafenstrasse 6, 10787 Berlin, Germany, http://www.din.de or http://
10.1520/D1275-24. www.bleuth.de
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1275 − 24
3. Significance and Use 5.4 Suitable Solvent—Technical grade acetone, heptane,
hexane and pentane.
3.1 In most of their uses, insulating liquids are continually
in contact with metals that are subject to corrosion. The 5.5 Water, distilled.
presence of elemental sulfur or corrosive sulfur compounds
6. Summary of Test Methods
will result in deterioration of these metals and cause conductive
or high resistive fil
...
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: D1275 − 15 D1275 − 24
315/98
Standard Test Method for
1
Corrosive Sulfur in Electrical Insulating Liquids
This standard is issued under the fixed designation D1275; 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.
This standard has been adopted for use by government agencies to replace Method 5328-2 of Federal Test Method Standard No. 791b.
This standard was adopted as an ASTM-IP Standard.
This standard has been approved for use by agencies of the U.S. Department of Defense.
INTRODUCTION
Prior to 2006, this test method existed as a singular method in which the main aging parameters of
the test specimen were 19 h at 140°C.140 °C. In 2006, it was determined that those parameters were
inadequate (not sensitive enough to detect all levels of corrosive sulfur) and Method B was instituted
in which the main aging parameters were 48 h at 150°C.150 °C. The old parameters were kept as
Method A to avoid any confusion. The current2015 edition of this test method for the copper corrosion
procedure reverts back to a singular method in which the main aging parameters are the same as the
previous Method B (2006-2014). Results from the current test method cannot be compared or
correlated to the method prior to 2006 and only to Method B from 2006 to 2014.
1. Scope
1.1 This test method describes the detection of corrosive sulfur compounds (both inorganic and organic) in electrical insulating
liquids.
1.2 New and in-service insulating liquids may contain elemental sulfur or sulfur compounds, or both, that cause corrosion under
certain conditions of use. This test method is designed to detect the presence of, or the propensity to form, free (elemental) sulfur
and corrosive sulfur compounds by subjecting copper or silver to contact with an insulating liquid under prescribed conditions.
1.3 The values stated in SI units are to be regarded as the standard. Inch-pound units are included for informational purposes.
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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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.
1
This test method is under the jurisdiction of ASTM Committee D27 on Electrical Insulating Liquids and Gases and is the direct responsibility of Subcommittee D27.06
on Chemical Test.
Current edition approved Nov. 15, 2015Jan. 15, 2024. Published January 2016February 2024. Originally approved in 1953. Last previous edition approved in 20062015
as D1275 – 06D1275 – 15. which was withdrawn January 2015 and reinstated in December 2015. DOI: 10.1520/D1275-15.DOI: 10.1520/D1275-24.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1275 − 24
2. Referenced Documents
2
2.1 ASTM Standards:
D130 Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D923 Practices for Sampling Electrical Insulating Liquids
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
2.2 Other Document:
3
ANSI B74.10 Grading of Abrasive Microgrits
4
DIN 51 353 Testing of Insulating Oils; detection of corrosive sulfur, silver strip test
3. Significance and Use
3.1 In most of their uses, insulating liquids are continually in contact with metals that are subject to corrosion. The presence of
elemental sulfur or corrosive sulfur compounds will result in deterioration of these metals and cause conductive or high resistive
films to form. The extent of deterioration is dependent upon the quantity and type of corrosive agent and time and temperature
factors. Detection of these undesirable impurities, even though not in terms of quantitative values, is a means for recognizing the
hazard involved.
3.2 Two methods are provided, one for copper corrosion and one for silver corrosion. Copper is sligh
...
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