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ASTM D874-13
Standard Test Method for Sulfated Ash from Lubricating Oils and Additives
Automaticky preložený názov:
Štandardná skúšobná metóda pre Sulfátový popol z mazacích olejov a aditív
NORMA vydaná dňa 1.8.2013
Informácie o norme:
Označenie normy: ASTM D874-13
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.8.2013
Kód tovaru: NS-39563
Počet strán: 5
Približná hmotnosť: 15 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM D874-13 :
Keywords:
additives, ash, lubricating oils, ICS Number Code 75.100 (Lubricants, industrial oils and related products)
Doplňujúce informácie
| Significance and Use | ||||||||||||||
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5.1 The sulfated ash can be used to indicate the concentration of known metal-containing additives in new oils. When phosphorus is absent, barium, calcium, magnesium, sodium and potassium are converted to their sulfates and tin (stannic) and zinc to their oxides (Note 5). Sulfur and chlorine do not interfere, but when phosphorus is present with metals, it remains partially or wholly in the sulfated ash as metal phosphates. 5.2 Because of above inter-element
interferences, experimentally obtained sulfated ash values may
differ from sulfated ash values calculated from elemental analysis.
The formation of such non-sulfated species is dependent on the
temperature of ashing, time ashed, and the composition of metal
compounds present in oils. Hence, sulfated ash requirement
generally should not be used in product specifications without a
clear understanding between a buyer and a seller of the
unreliability of an ash value as an indicator of the total metallic
compound content.1.1 This test method covers the
determination of the sulfated ash from unused lubricating oils
containing additives and from additive concentrates used in
compounding. These additives usually contain one or more of the
following metals: barium, calcium, magnesium, zinc, potassium,
sodium, and tin. The elements sulfur, phosphorus, and chlorine can
also be present in combined form.
1.2 Application of this test method to sulfated ash levels below 0.02 mass % is restricted to oils containing ashless additives. The lower limit of the test method is 0.005 mass % sulfated ash. 1.3 The values stated in SI units
are to be regarded as standard. No other units of measurement are
included in this standard.
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 and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||||||
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