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We perform lubricating grease quality testing by ASTM D, which gives several methods for determining and estimating the makeup of lubricating greases. These test methods for analysis cover greases of the conventional type, which consist essentially of petroleum oil and soap. The constituents that can be. ASTM D standard test methods for analysis of lubricating grease. ASH DETERMINATION 7. General The percentage of ash shall not be included in the.

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Confirm the presence of the several bases by suitable chemical tests, following any standard scheme of qualitative analysis. Any of the test methods described herein are best used by an experienced grease analyst who may also be able to make appropriate adaptations of the techniques as occasion requires.

Cool the crucible and contents in a desiccator and weigh, reporting v128 result as percentage of ash. Results will always be low in the presence of easily reducible oxides of volatile metals.

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.

Slowly burn off the combustible matter, and finally ignite the residue until the ash is free of carbonaceous matter. Contact with us now Your mail: Avoid skin contact or ingestion for free acidity, shall show free acid present. Link to Active This link will always route to the current Active version of the standard. Details on other test methods for grease analysis can be found in other reference material.


This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. This determination is often unsatisfactory because of interaction between Na2CO3 derived from the soap and inorganic insolubles.

ASTM D – 98()e1 Standard Test Methods for Analysis of Lubricating Grease

May be harmful dd128 swallowed. There is always likelihood of reaction with the porcelain crucible itself on account of the long continued heating necessary to burn off all carbon.

Analysis, Extraction, Fat content, Fluid content, Free alkali content, Free fatty acid content, Glycerin content, Insolubles content, Lubricating grease, Petroleum oil content, Soap content, Soxhlet apparatus, Thickener content, Water content. Click to learn more. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Rapid Routine Test Method 8. Contact with organic material may cause fire.

ASTM D – 98()E1 – Standard Test Methods for Analysis of Lubricating Grease

Alternative Test Method 9. If lead or zinc soap is known to be absent, a platinum crucible is more convenient. Power by seonoco Zstm Rights Reserved: If only one base is present, a quantitative determination is, in general, unnecessary.

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The faster, easier way to work with standards. Lithium is indicated by a white infusible ash, readily soluble in water, giving a strongly alkaline solution. After cooling and weighing, report the result as percentage of ash as sulfates.

You may experience issues viewing this site in Internet Explorer 9, 10 or Free Alkali and Free Ast. Evaporate the contents of the crucible to dryness and ignite the whole at a low red heat, adding a few small pieces of dry NH4 2CO3 Warning – Harmful if zstm to drive off the excess SO3. Take the smart route to manage medical device compliance. Contact with water liberates large amounts of heat running the acid in carefully from a pipet inserted under a aatm watch glass covering the crucible.


ASTM D128 – 98(2014)E1

These test methods are applicable to many, but not all, greases. Historical Version s – view previous versions of standard Translated Version s: Please download Chrome or Zstm or view our browser tips. Rinse the watch glass with water into the crucible. Learn more about the cookies we use and how to change your settings.

No other units of measurement asgm included in this standard. Moreover, if much Na2CO3 or K2CO3 is present, the ash is fusible and often encloses carbon, making complete removal of the latter very difficult.

Zinc is shown by the yellow color of the ash while hot, and lead may be indicated by the presence of metallic globules or by the yellow color of the ash when cold.

NOTE 3 – The determination of the total ash should not in general be c128 as of any great importance.