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ASTM D1275-06

Historical Revision

Standard Test Method for Corrosive Sulfur in Electrical Insulating Liquids

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1.1 This test method describes the detection of corrosive sulfur compounds (both inorganic and organic) in electrical insulating oils of petroleum origin.

1.2 New and in-service mineral insulating oils may contain substances 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 to contact with oil under prescribed conditions.

1.3 Two methods (A and B) have been introduced where historically there has only been one. Method A is the one that has been in place since 1953. Method B is more rigorous and the preferred method.

1.4 The values stated in SI units are to be regarded as the standard. Inch-pound units are included for informational purposes.

This standard does not purport to address 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.


In most of their uses, insulating oils are continually in contact with metals that are subject to corrosion. The presence of corrosive sulfur compounds will result in deterioration of these metals. 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.

SDO ASTM: ASTM International
Document Number D1275
Publication Date March 1, 2006
Language en - English
Page Count 3
Revision Level 06
Supercedes
Committee D27.06
Publish Date Document Id Type View
Jan. 15, 2024 D1275-24 Revision
Nov. 15, 2015 D1275-15 Revision
March 1, 2006 D1275-06 Revision
March 10, 2003 D1275-03 Revision
Jan. 1, 1996 D1275-96A Revision