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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Link to Active This link will always route to the current Active version of the standard. Test Method D can be used for this purpose.

Astm d974 some oils, it d94 important to monitor both the AN and Astm d974 to determine the reactions in the oil.

Additive depletion, contamination and oxidation are common pathways of lubricant degradation. No astm d974 units of measurement are included in this standard. Astm d974 Trends Trending results is the best way to work around the accuracy discrepancies that come from using AN results in machine condition monitoring.

Astm d974 two commonly used ASTM test methods both exhibit issues that astm d974 the need for modified tests. As additives deplete and react, the AN varies. The sample is dissolved into a solution of toluene, p-naphtholbenzne, and isopropyl alcohol containing water.

Simple mathematics could be used astm d974 determine the exact value, but in the real world of AN tests, the precision of 9d74 individual labs is what can be counted on. The relative amount of these materials can be determined by titrating with acids or bases.

Link astm d974 Active This link will always route to the current Active version of the standard. It represents the linear oxidation of the base oil.

This prevents the pH test method from obtaining a good indication of how the weak acid concentration is changing in the lubricant. It is the responsibility of the user of this standard astm d974 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Understanding how the AN is calculated and what astm d974 exist will help in interpreting the results. The solution is titrated with KOH while the color is astm d974.

By trending the AN, this increase can be detected. For Used Oil Analysis Labs Laboratories modify tests to improve throughput while decreasing the use of hazardous materials and their cost. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. astm d974

ASTM D – 14e2 Standard Test Method for Acid and Base Number by Color-Indicator Titration

zstm For instance, the Astm d974 and base number BN tests are not affected by extremely weak acids and bases that have a dissociation constant of less than No general correlation is known between acid number and the corrosive tendency of oils toward metals.

What are the dos and don’ts of asgm results? D Reproducibility from ASTM Standard Advantages astm d974 Disadvantages Repeatability ASTM defines repeatability astn “the difference between successive test results obtained by the same operator with the same apparatus under constant operating conditions on identical test material”.

Similarly, constituents considered to have astm d974 properties include organic astm d974 inorganic bases, amino compounds, salts of weak acids soapsbasic salts of polyacidic bases, salts of heavy metals, and addition agents such as inhibitors and detergents.

ASTM D974 – 14E2

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. The apparent pH is a representation of how d94 the oil may be, but it does not indicate the concentration of acidic or alkaline constituents.

First, the user must be wary of comparing results between labs. The potentiometer output is monitored while the KOH is titrated into the solution. Concurrently, astm d974 oil is possibly being contaminated with acidic constituents, increasing the acid content in the oil.

Strong acidic components are referred to as SAN. Because the oil sample is a specific size, the burette has been scaled to indicate the AN. Astm d974 prepare the sample a mixture of toluene, isopropyl alcohol v974 water is dissolved into a sample.

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Note 3—Oils, astm d974 as many cutting oils, rustproofing oils, and similar compounded oils, or excessively dark-colored oils, that cannot be analyzed for acid number by this test method astm d974 to obscurity of the color-indicator astm d974 point, d947 be analyzed by Test Method D The potentiometric method uses a potentiometer to detect the asm constituents and coverts it to an electronic read out.

A Comprehensive Look At the Acid Number Test

Each laboratory provides results astm d974 its own modified test methods, which forces the end user to rely on precision over accuracy. In an effort to control the source of these issues, many modified versions of the AN astm d974 are currently being used. The AN and BN test methods respectively measure the concentration of acidic and alkaline constituents.

Advantages and Disadvantages Repeatability ASTM defines repeatability as “the difference between successive test results obtained by the same operator with the same apparatus under constant operating conditions on identical test material”. D Repeatability from ASTM Standard Modified Tests AN tests are typically conducted to obtain an accurate indication of additive astm d974 and astm d974 contamination of ingressed acids. This number is used as a guide in the quality asym of lubricating oil formulations.

Consistently use the same lab and test method astm d974 a specific lubricant. They typically contain premeasured reagents that allow for convenient field testing. Acidic contaminants, wrong oil, alkaline-reserve depletion and oxidation by-products can cause an increase in acid concentration.

Figure astm d974 shows the underlying components that affect the AN during lubricant aging. This confirms that comparing results from one single lab or test procedure is best.

How is AN trended and what are the common trends? Field tests can also report actual results. For example, a sample that has a 0. Machine Oil Case Study: Astm d974 an ideal environment, both accuracy and precision would be provided.