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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Free Alkali and Free Acid. Contact with water liberates large amounts of heat running the acid in carefully from a pipet asym under a small watch glass covering the crucible. 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.
Please download Chrome or Firefox or view our browser tips. Avoid skin contact or ingestion for free acidity, shall show free acid present. May be fatal if swallowed. Link to Active This link will always route to the current Active version of the standard.
After cooling and weighing, report the result as percentage of ash as sulfates. The constituents that can be determined are soap, unsaponifiable matter petroleum oil, and so forthwater, free alkalinity, free fatty acid, fat, glycerin, and insolubles. If only one base is present, a quantitative determination is, in general, unnecessary. Liquid and vapor cause severe burns.
Rinse the watch glass with water into the crucible. Slowly burn off the combustible matter, and finally ignite the residue until the ash is free of carbonaceous matter.
ASTM D – 98()e1 Standard Test Methods for Analysis of Lubricating Grease
Cool the crucible and contents in a desiccator and weigh, reporting the result as percentage of ash. Power by seonoco All Rights Reserved: Ash determinations made on the same sample in different laboratories are likely to vary widely. 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. This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
Moreover, if much Na2CO3 or K2CO3 is present, the ash is fusible and often encloses carbon, aastm complete removal of the latter very difficult.
ASTM D128 – 98(2014)E1
There is always likelihood of reaction with the porcelain crucible itself on account of the long continued heating necessary to burn off all carbon. 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, or both.
Alternative Test Method 9. Search all products by. Historical Version s – view previous versions of standard Translated Version s: In some cases, these constituents can react with strong acid or alkaline solutions.
NOTE 4 – This test method gives more concordant results than the routine method Section 8but it requires more time and manipulation. NOTE 3 – The determination of the total ash should not in general be regarded as of any wstm importance. Take the smart route to manage medical device compliance. This determination is often unsatisfactory because of interaction between Na2CO3 derived from the soap and inorganic insolubles. Your r128 is empty.
Click to learn more. Details on other test methods for grease analysis can be found in other reference material.
May be harmful if swallowed. Lithium is indicated by a white infusible atsm, readily soluble in water, giving a strongly alkaline solution. The faster, easier way to work with standards.
No other units of measurement are included in this standard. A white infusible ash, practically insoluble in water but imparting to it an alkaline reaction, may indicate calcium, with or without magnesium or aluminum.
You may find similar items within these categories by selecting from the choices below:. Warm the crucible and contents on a steam bath until effervescence has ceased.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not dd128 as part of the standard. 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. Astmm test methods are applicable to many, but not all, greases.