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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You may find similar items within these categories by selecting from the choices below:. There is always likelihood of reaction with the porcelain crucible itself on account of the long continued heating necessary to burn off all carbon.
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. Learn more about the cookies we use and how to change your settings. May be harmful if swallowed.
This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. If lead or zinc soap is known to be absent, a platinum crucible is more convenient.
This test method is intended primarily for application to greases containing thickeners that are essentially insoluble in n -hexane, and to greases that cannot be analyzed by conventional methods because of the presence of such constituents as nonpetroleum fluids or nonsoap-type thickeners, astmm both. Rapid Routine Test Method 8.
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 ast, color of the ash when cold. The solution, when tested with methyl red Warning – Flammable.
Free Alkali and Free Acid. Moreover, if much Na2CO3 or K2CO3 is present, the ash is fusible and often encloses carbon, making complete removal of the latter very difficult. You may experience issues viewing this site in Internet Explorer 9, 10 or May be fatal if swallowed.
Historical Version s – view previous versions of standard. Contact with water liberates large amounts of heat running the acid in carefully from a pipet inserted under a small watch glass covering the crucible. Slowly burn off the combustible matter, and finally ignite the residue until the ash is free of carbonaceous matter.
Find Similar Items This product falls into the following categories. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Avoid skin contact or ingestion for free acidity, shall show free acid present. The constituents that can be determined are soap, unsaponifiable matter petroleum oil, and so forthwater, free alkalinity, free fatty acid, fat, glycerin, and insolubles.
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 – D218 if swallowed to drive off the excess SO3. If only one base is present, a quantitative determination is, in general, unnecessary. Confirm the presence of the several bases by suitable chemical tests, following any standard scheme of qualitative analysis.
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Lithium is indicated by a white infusible ash, readily soluble in water, giving a strongly alkaline solution. Warm the crucible and contents on a steam bath until effervescence has ceased.
Your basket is empty. Rinse the watch glass with water into the crucible. Liquid and vapor cause severe burns. NOTE 3 – The determination of the total ash should not in general be regarded as of any great importance.
Power by seonoco All Rights Reserved: These test methods are applicable to many, but not all, greases. A white infusible ash, practically insoluble in water but imparting to it an alkaline reaction, may indicate calcium, with or without magnesium or aluminum. Ash determinations made on the same sample in different laboratories are likely to vary widely.