Contact ASTM International () for the latest information. Designation: D – 97 An American National Standard British Standard ASTM-D No. de Acido Por Color – Download as PDF File .pdf), Text File .txt) or read online. 1 Dec Purchase your copy of ASTM D – 14E2 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards.
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Referenced Documents purchase separately The documents listed below astm d974 referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route astm d974 the current Active version of the standard.
The apparent pH is a representation of how corrosive the oil may be, but it does not indicate the concentration of acidic or alkaline constituents. The AN and BN test astm d974 respectively measure astm d974 concentration of acidic and alkaline constituents.
No general relationship between bearing corrosion and acid or base numbers is known. Strong acidic components are referred to as SAN.
SAN is usually not astm d974, but it may be useful to an astm d974 analysis program if protection from corrosion is important or if there is a possibility of contamination from r974 inorganic acid.
What standardized methods are currently used in the industry? Modified Tests AN tests are typically conducted to obtain an accurate indication of additive depletion and possible contamination of ingressed acids.
First, the user must be wary of comparing results astm d974 labs. The acid concentration of the asmt contains both strong and weak components. What are the advantages and disadvantages of each test reproducibility, repeatability, etc. Note 1—In new and used oils, the constituents considered to have acidic characteristics include organic and inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, and addition agents such as inhibitors and detergents.
A change in the acid aastm of an oil can originate from multiple sources. It is the responsibility of the user of this astm d974 to establish appropriate e974 and health practices and astm d974 the applicability of regulatory limitations prior to astm d974.
Historical Version s – view previous versions of standard. Field tests can also report actual results. The weak components and the strong components are typically combined as AN.
In new and used oils, the constituents considered to astm d974 acidic characteristics include organic and inorganic acids, esters, phenolic compounds, lactones, resins, salts of heavy metals, and addition agents such as inhibitors and astm d974. Although the titration is made under definite equilibrium conditions, the method does not measure an absolute acidic or basic property that can be used to predict performance of an oil under service conditions.
D Reproducibility from ASTM Standard Advantages and Disadvantages Repeatability ASTM defines repeatability as “the difference between successive test results obtained by the same astm d974 with the same apparatus under constant operating conditions on identical test material”.
ASTM D974 – 14E2
AN has a better ability than pH asrm detect and monitor astm d974 acids, which do not readily dissociate in water. Throughput, or speed, is important to larger laboratories because it is necessary astm d974 find the fastest test that does not sacrifice quality.
Verify which lab has analyzed the lubricant and the test used. It has a mean AN of 0. This astm d974 the pH test method from obtaining a good indication of how the weak acid concentration is changing in the lubricant.
A Comprehensive Look At the Acid Number Test
For example, one such kit uses a astm d974 syringe to ensure that the oil samples are the same size. This number is used as a guide in the quality control of lubricating oil formulations.
As additives deplete and react, the AN varies. Work Item s – proposed revisions of this standard. The pH test method astm d974 useful in astm d974 where corrosive oil could cause considerable damage. Link to Active This link will always route to the current Active version of the standard.
A Comprehensive Look At the Acid Number Test
The switching trend is astm d974 of EP oils, where v974 of the additives are acidic. Addressing Challenges of Online Monitoring. This change is based on the fact that AN tests do not detect the total acid concentration of the lubricant. In a next-to-ideal world, only accuracy would be provided. Because astm d974 oil sample is a specific size, the burette has astm d974 scaled to indicate the AN.
Once the color has changed, the user only can read the acid number from the burette.