ASTM D943 PDF
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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NOTE 7—Test results by this method are greatly affected by differences wstm sampling procedure. The temperature measurement system uses a PT probe to ensure long term temperature stability without routine maintenance or re-calibration.
The subcommittee responsible for this method is investigating the application of alternative criteria for evaluation of lubricants using this test apparatus.
If more than two results are obtained by one or both of the laboratories, reproducibility can be calculated as indicated in 4.
For overnight storage less than 24 h the coil may be stored in n-Heptane. NOTE 2—Alternatively, suitably prepared catalyst coils may be purchased from a supplier. The correct level for water additions may, if desired, be indicated by a movable metal strip Fig. Rinse all the glassware with n-Heptane to remove traces of oil, wash with a hot detergent solution using a long-handled brush, and rinse thoroughly with tap water.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Place the sampling tube holder over the oxygen delivery tube. Unless otherwise indicated, it is intended that all reagents conform to the speci?
The temperature of the bath is always higher than the sample temperature due to the cooling effect of the oxygen gas?
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? A number in parentheses indicates the year of last reapproval. Slide the catalyst coil over the inlet of the oxygen delivery tube.
Immerse the test tube in the heating bath. Individual reprints single or multiple copies of this standard may be obtained by sstm ASTM at the above address or at phonefaxor service astm. Marking the upper oil level of the? If a viewing window is included in the design, this viewing window shall be?
D — 02 Notes: Originally published as D — NOTE 10—Beyond 10 h, oil removal causes the metal catalyst coil to be exposed to the atmosphere. 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?
Without interrupting the oxygen? It is recognized that there is no ASTM semi-micro method now available for v943 titration. v943
Similar wire conforming to BS is also satisfactory. Connect the condenser to the cooling water. Open tube ends to be ground and? Adjust the rate of? Make temperature measurements only with new, undepleted, oil samples, and preferably with dummy cells used speci?
Place the condenser over the oxygen delivery tube and test tube. The turns of wire are evenly spaced, and two consecutive turns of the same wire are 3. To allow for heating of the stem portion of the thermometer above the immersion point in the upper portion of the test cell, subtract 0.
Redistilled n-Heptane conforming to 6. The smaller diameter is to allow for springback of the steel wire after winding, so as to give Any arrangement that leads to the coil con? Position the bottom end of the sampling tube inside the catalyst coil. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Measure the sample temperature d94 a thermometer positioned in the oxidation cell by a thermometer bracket, as in Asgm.
All dimensions are in millimetres inches 1. The overall length of the? Warning— Compressed gas under high pressure.