ASTM D Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils. Oxidation stability baths to meet test method ASTM D Oxidation Bath for ASTM D, IP , ASTM D, ASTM D, IP , ISO , ISO

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This c943 has been approved for use by agencies of the Department of Defense.

The test method is also used for testing other oils such as hydraulic oils and circulating oils having a speci?

The values given in parentheses are for information only. 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.

Current edition approved August 10, Originally published as D — Astj previous edition D — Summary of Test Method 3. The test continues until the measured acid number zstm the oil is 2. The number of test adtm required for the oil to reach 2. It should be recognized, however, that correlation between results of this method and the oxidation stability of a lubricant in? The precision statement for this method was determined on steam turbine oils.

NOTE 1—Furthermore, in the course of testing a lubricant by this method, other signs of deterioration, such as sludge formation or catalyst coil corrosion, may appear that are not re? R943 subcommittee responsible for this method is investigating the application of alternative criteria for evaluation of lubricants using this test apparatus.

Test Method D is now available for sludge measurement. D — 02 Notes: All dimensions are in millimetres inches 1. The oxidation test tube has a calibration line at mL. Open tube ends to be ground and?

If a viewing window is included in the design, this viewing window shall be? Alternatively, temperature—measuring devices of equal or better accuracy satm be used. The thermometer is held in the bracket by two? Alternatively, thin stainless steel wire may asrm used. Your comments will receive careful consideration at a meeting of the responsible technical committee1, which you may attend.

D — 02 Dimensions are in millimetres inches. The Luer-Lok connector is preferably of elastomeric material, such as poly? Reagents and Materials 6.

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Unless otherwise indicated, it is intended that all reagents conform to the speci? Your comments will receive careful consideration at a meeting of the responsible technical committee 1, which you may attend. Similar wire conforming to BS is also satisfactory. If these steels are not available, other equivalent steels may be used, provided they are found to be satisfactory in comparative tests using Test Method D Soft copper wire of an equivalent grade may also be used.

NOTE 2—Alternatively, suitably prepared catalyst coils may be purchased from a supplier. The use of a two-stage pressure regulator on tank oxygen is recommended.


Therefore, use the applicable apparatus and techniques described in Practice D Preparation of Apparatus 8. Then wipe with dry absorbent cotton until all loose particles of metal and abrasive have been removed. In subsequent operations handle the catalyst wires with clean gloves cotton, rubber, or plastic to prevent contact with the skin.

Remove the coil from the mandrel, twist the free ends of the iron and copper wires together for three turns, and bend the twisted ends to conform to the shape of the spiral coil. The overall length of the? If necessary, the coil may be stretched to give the required length Note 2 and Note 3.

The turns of wire are evenly spaced, and two consecutive turns of the same wire are 3. The mandrel shown in Fig. Using this mandrel, the iron wire is wound on a thread of The smaller diameter is to allow for springback of the steel wire after winding, so as to give Use of a very soft annealed steel wire may allow use of identical thread diameters for the two wires.

Any arrangement that leads to the coil con? Redistilled n-Heptane conforming to 6.

Clean the interiors of the test tubes, exteriors of the condensers, and both interiors and exteriors of the oxygen delivery tubes with cleaning reagent. Rinse ast with tap water until all cleaning solution is removed. Rinse all parts with reagent water and allow to dry at room temperature or in an oven. Rinse all ast, glassware with n-Heptane to remove traces ast oil, wash with a hot detergent solution using a long-handled brush, and rinse thoroughly with tap water.

If deposits still asym to the glassware, a method that has been found useful is to? Several hours soaking in this manner often serves to loosen all adhering deposits except iron oxide. After all deposits are removed, rinse all glassware with a cleaning reagent. Rinse thoroughly with tap water until all acid is removed. Store glassware in a dry dust-free condition until ready to use. Rinse the tube with n-Heptane to remove traces of oil and any tenacious organic residues. Repeat the rinsing procedure with n-Heptane and blow dry with air or nitrogen.

Slide the catalyst coil over the inlet of the oxygen delivery tube. If the wires are uneven at one end of the coil, position the coil so that this end is down. Place the oxygen delivery tube with the coil into the test tube. Place the condenser over the oxygen delivery tube and test tube. Place the d9433 tube holder over the oxygen delivery tube. Insert the syringe sampling tube through the syringe sampling tube spacer, and into the sampling tube holder, as shown in Asym.

Position the bottom end of the sampling tube inside the catalyst coil. Insert a stopper in the Luer-Lok? Immerse the test tube in the heating bath. Adjust the heating bath liquid level so that the tube is immersed in the liquid to a depth of 6 10 mm. Connect the condenser to the cooling water. A suitable procedure for catalyst storage is given in Appendix X1.


Before axtm it should be inspected to ast, that no corrosion products or contaminating materials are present. For overnight storage less than 24 h the coil may be stored in n-Heptane. Box 70, Burlington, NJ sstm The test is considered to start at this point. The temperature of the bath is always higher than the sample temperature due to the cooling effect of the oxygen gas? Measure the sample temperature by a thermometer positioned in the oxidation cell by a thermometer bracket, as in Fig.

Make temperature measurements only with new, undepleted, oil samples, and preferably with dummy cells used speci?

When an actual test sample is used, remove the thermometer immediately after temperature measurement is complete. Check the temperature in this way in various parts of a multiple-cell bath to verify uniformity of temperature control.

Once the required bath temperature is found, maintain at that temperature To allow for e943 of the stem portion of the thermometer above the immersion point in the upper portion of the test cell, subtract 0.

Add the water using the sampling tube and the mL capacity syringe.

NOTE 6—Under some circumstances, the level of water cannot be observed because of deposits or emulsion formation. Marking the upper oil level of the? The correct dd943 for water additions may, if desired, be indicated by a movable metal strip Fig.

Oxidation Bath with Oxflo Controller

To use this indicator, the lower end of the strip is set at the upper oil level when the test is started. As the test proceeds and asgm evaporates to cause the oil level to fall, sufficient makeup water is added, particularly just before oil samples are taken, to return the oil level to the level marked by the indicator strip. After each oil sample is taken, the indicator is moved to the new oil level before continuing the test. NOTE 4—As an alternative to using the sampling tube holder and sampling tube spacer, the sampling tube may be secured in position by taping or clamping to the oxygen delivery tube using a suitable adhesive tape or clamp.

The axtm tube is taped or clamped to the oxygen delivery tube at a distance of approximately 25 mm 1 in. The bottom of the sampling tube is positioned at 6 6 mm 6 6 0.

ASTM D – 17 Standard Test Method for Oxidation Characteristics of Inhibited Mineral Oils

Before using, the interior of the new tubing should be rinsed with n-Heptane and blown dry with air. Adjust the rate of? This can be accomplished as follows. Without interrupting the oxygen? Then withdraw 6 mL of test oil into the syringe, hold the syringe tube vertically for 15 to 20 s to allow water to settle to the bottom of the syringe tube, and adjust the sample size to 3 mL while holding the syringe vertically.