1、 FORD LABORATORY TEST METHOD BJ 020-01 Date Action Revisions 2000 08 31 Revised Editorial no technical change A. Cockman 1992 05 13 Printed copies are uncontrolled Page 1 of 4 Copyright 2000, Ford Global Technologies, Inc. TEST FOR MAXIMUM POUR POINTS OF LUBRICATING OILS CONTAINING POUR POINT DEPRES
2、SANTS Application This procedure is intended for use in determining the highest temperature at which petroleum base oils containing pour point depressants will solidify when th ey are subjected to cyclic temperature gradients. Note: The actual temperature at which an oil will solidify under commerci
3、al conditions of storage can be expected to fall somewhere between the maximum pour point determination by this method and the pour point determined by ASTM Method D 97 - 57. Description of Test This test consists of cycling the temperature of the oil three times, from 30 to + 20 F. During each of t
4、he cycles, at the cooling step, the oil is observed at prescribed temperatures whe n the test jar is tilted. The pour point is defined as that temperature, 5 F above the point at which no flow is observed. The highest of the recorded pour points is reported as “maximum“ regardless of the cooling cyc
5、le in which it is observed. Apparatus Required The apparatus shall be as specified in ASTM D 97 - 57, but assembled as in Figure 1. The equipment (test jar, jacket and cooling bath) must be capable of maintaining temperatures between 30 and 35 F and - 70 and - 60 F. The thermometers are to be low cl
6、oud and pour test thermometers capable of a temperature range of - 70 to + 70 F and must conform to the specification for ASTM thermometer E1 - 61 (6F - 59). Bath temperatures may be measured with any suitable thermometer. Conditioning and Test Conditions All test values indicated herein are based o
7、n material conditioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ - 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BJ 020-01 Page 2 of 4 Copyright 2000, Ford Global Technologies, Inc.
8、 Procedure 1. Dry the inside of each jacket and place a clean, dry insulating disc on the bottom of each. Clean and dry the ring gasket and place it on the test jar at such a point that it will be nearly flush with the top of the jacket when t he jar is inserted. Pour the oil sample at 23 +/ - 2 C i
9、nto the test jar in quantity sufficient to fill the jaw to a point between the two etched lines (2 to 2 1/2 inches above bottom). Stopper the jar tightly by means of a cork which supports the test t hermometer in a vertical position in the center of the jar. Adjust the thermometer so that it is imme
10、rsed in the oil to a point 1/8 inch above the beginning of the capillary. Prepare a duplicate sample in the same manner. 2. Place the test jars directly in the jackets in the - 70 to - 60 F bath, allowing each jar to sit on the insulating disc and seal the annular opening at the top by means of the
11、ring gasket as shown in Figure 1. Allow the samples to remain undisturbed until the oil temperatures reach - 30 F. If the two samples do not reach this point at the same moment, transfer both to the next bath when the slower cooling one has reached - 30 F. Note: When transfer is made of the samples
12、from one bath to another, the test jar shall always be pl aced in the jacket, not directly into the cooling medium. 3. First Cycle: When the oil temperature reaches - 30 F, transfer the samples to a bath at + 30 F, and allow them to remain undisturbed in this bath until a temperature of + 20 F is re
13、ached. A s each sample reaches + 20 F, transfer it immediately to the bath at - 60 F. Beginning with the oil at a temperature of + 20 F, carefully remove the test jar from the bath and tilt it just enough to ascertain if there is a movement of the oil. If move ment is observed, return the jar to the
14、 - 60 F bath. Do not consume more than 3 s for the complete operation of removal, observation and replacement. Repeat this observation for flow at each of the succeeding lower 5 F temperatures. When the oil does not appear to flow as the jar is tilted, hold the test jar in a horizontal position for
15、5 +/ - 0.1 s, observe the oil for movement and immediately return it to the cooling bath. If the oil in the test jar shows no movement under this last condition, record it as being solid at the temperature indicated by the test thermometer; otherwise record the oil as being fluid. 4. Second Cycle: W
16、hen the oil temperature reaches - 30 F, transfer each test jar to a bath at + 30 F and allow it to remain undisturbed in th at bath until the samples reach a temperature of + 20 F. As each sample reaches + 20 F, transfer it immediately to the bath at - 60 F. If both samples were fluid in the first c
17、ycle, observe the condition of the one sample at - 20 F and the condition of the other at - 25 F. If either or both samples were observed to be solid during the first cycle, observe the condition of one sample at 5 F above the higher solid point recorded and the condition of the other at 10 F above
18、the same point. Record th e condition of the two samples as solid or fluid at the temperature of observation. FORD LABORATORY TEST METHOD BJ 020-01 Page 3 of 4 Copyright 2000, Ford Global Technologies, Inc. 5. Third Cycle: When the oil temperature reaches - 30 F, transfer each test jar to a bath at
19、+ 30 F, and allow it to remain undisturbed in that bath until the samples reach a temperature of + 20 F. As each sample reaches + 20 F, transfer it immediately to the bath at - 60 F. If both samples were recorded as fluid in the first cycle and in the second cycle, observe the condition of one sampl
20、e at - 30 F and the cond ition of the other at - 35 F. If either or both samples were recorded as being solid during the second cycle, observe the condition of the one sample at 5 F, above the higher solid point recorded in the second cycle and the condition of the other sample at 10 F above the sam
21、e point. If either or both samples were recorded as being solid in the first cycle and subsequently both were recorded as being fluid in the second cycle, observe the condition of one at 5 F and the other at 10 F above the higher solid point recorded in the first cycle. Record the condition of the s
22、amples as solid or fluid at the temperature of observation described above. 6. Report as the maximum pour point of the oil under test that temperature 5 F above the highest temperatur e at which either sample was observed at any time to be solid during the course of the test. If the highest solid po
23、int observed was + 20 F, the maximum pour point shall be reported as “+ 25 F, or above“. If the sample and duplicate were fluid at all o bservations, the maximum pour point shall be reported as “ - 35 F or below“. Note: If at any time during the test, an oil is found to be solid at + 20 F, testing o
24、f this oil may be discontinued and it may be reported as having a maximum pour point of “+ 25 F or above“. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BJ 020-01 Page 4 of 4 Copyright 2000, Ford Global Technologies, Inc. TEST FOR MAXIMUM POUR POINTS OF LUBRICATING OILS CONTAINING POUR POINT DEPRESSANTS
