SwRI: Sulphated Ash Test, ASTM D 874, International Lubricant Testing, ACEA Lubricant Test
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SwRI offers the sulphated ash laboratory evaluation. |
Sulphated ash laboratory evaluation method ASTM D 874 is offered by Southwest Research Institute (SwRI) to determine the sulphated ash in unused lubricating oils containing additives and from additive concentrates used in compounding.
ACEA 2008
Specifications
The sulphated ash evaluation is part of ACEA 2008 Specifications:
| Gasoline and Diesel Engines |
Gasoline and Diesel Engines with Aftertreatment Devices |
Heavy-Duty Diesel Engines |
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A1/B1-08 A3/B3-08 A3/B4-08 A5/B5-08 |
C1-08 C2-08 C3-08 C4-08 |
E4-08 E6-08 E7-08 E9-08 |
ASTM D 874
Test Parameters
These additives usually contain one or more of the following metals:
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barium
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calcium
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magnesium
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zinc
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potassium
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sodium
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tin
These elements can be present in combined form:
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sulphur
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phosphorus
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chlorine
The
sample is ignited and burned until only ash and carbon
remain.
After cooling, the residue is treated with sulphuric acid
and heated to 775°C until carbon oxidation is complete. The
ash is then cooled, retreated with sulphuric acid, and
heated to 775°C to constant weight. The sulphated ash can be
used to indicate the concentration of known metal-containing
additives in new oils. The result to the nearest 0.001 mass%
for samples below 0.02 mass% and to the nearest 0.01 mass%
for higher levels are reported as the sulphated ash.
Pass / Fail Criteria
The pass/fail criteria include maximum variation of characteristics after immersion for 7 days in fresh oil without pre-aging.
| Gasoline and Diesel Engines | ||||
| Property | Limits | |||
| A1/B1-08 | A3/B3-08 | A3/B4-08 | A5/B5-08 | |
| Sulphated Ash, % m/m | ≤1.3 | ≤1.5 | ≤1.6 | ≤1.6 |
| Gasoline and Diesel Engines with Aftertreatment Devices | ||||
| Property | Limits | |||
| C1-08 | C2-08 | C2-08 | C4-08 | |
| Sulphated Ash, % m/m | ≤0.5 | ≤0.8 | ≤0.8 | ≤0.5 |
| Heavy-Duty Diesel Engines | ||||
| Property | Limits | |||
| E4-08 | E6-08 | E7-08 | E9-08 | |
| Sulphated Ash, % m/m | ≤2.0 | ≤1.0 | ≤2.0 | ≤1.0 |
*Association des Constructeurs Européens d'Automobiles / European Automobile Manufacturers Association.
For more information about sulphated ash evaluation (ASTM D 874) capabilities at SwRI or how you can contract with SwRI, please contact Becky Grinfield at bgrinfield@swri.org or (210) 522-3652.
Printed from:
http://www.swri.org/4org/d08/global/SulfAsh/default.htm?