1、 FORD LABORATORY TEST METHOD EU-AT 050-01 Date Action Revisions 2001 01 31 Revised Editorial no technical change A. Cockman 2000 04 25 Editorial no technical change A. Cockman 1994 02 28 Printed copies are uncontrolled Page 1 of 3 Copyright 2001, Ford Global Technologies, Inc. OIL CONTENT OF SOLUBLE
2、 OIL EMULSIONS Application This method is used to determine the oil content of soluble cutting oil emulsions. Apparatus and Chemicals Required Separating Funnel 250 mL capacity. Flat Bottom Flask 150 mL capacity with a 10 mL graduated neck, conforming to BS 676 or 130 mL capacity to DIN 51368E. pH M
3、eter Or equivalent pH indicator papers. Laboratory Oven or Water Bath Capable of maintaining a temperature of 90 +/- 5 C. Sulphuric Acid - cp 50 % or Hydrochloric Acid - Concentrated Water Distilled or demineralised. Conditioning and Test Conditions All test values indicated herein are based on mate
4、rial 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 EU-AT 050-01 Page 2 of 3 Copyright 2001, Ford Global Technologies, Inc. Prep
5、aration of Sample Note: Before transferring the sample to the separating funnel, check the pH value and record. 1. Gently shake the sample until it is consistent, then pour 200 mL into the separating funnel and allow to stand for 16 +/- 2 h. Examine for evidence of a creamy layer, separation, floccu
6、lation and discolouration. 2. After standing, run off the first 10 mL and discard. Run off slowly (approximately 150 mL per minute) into a suitable beaker a further approximate 150 mL of dispersion. The remainder, which is mainly tramp oils can be discarded. Stir the dispersion to obtain consistency
7、 and test immediately. Procedure A 1. Measure 100 mL of the uniform dispersion into the graduated flask and add acid to the top graduation. 2. Shake the contents of the stoppered flask thoroughly, remove stopper slowly. Caution: Slight pressure from gassing.* 3. Place flask in a laboratory oven at 9
8、0 +/- 5 C and heat for a minimum of 3 hours or on a boiling water bath for 1 hour minimum to obtain complete separation. 4. Remove the flask and allow to stand for 1 hour, swirling it from time to time to detach any oil adhering to the sides. 5. Determine the difference in scale readings correspondi
9、ng with the top edge of the meniscus at the upper and lower levels of the separated oil, and record the volume to the nearest 0.1 mL. Evaluation Calculate the oil content as a percentage by volume and report it to the nearest 0.1 %. FORD LABORATORY TEST METHOD EU-AT 050-01 Page 3 of 3 Copyright 2001
10、 Ford Global Technologies, Inc. Procedure B For total oil estimation which includes tramp oils, take 100 mL of the sample as received and follow Procedure A. The difference in oil content between that obtained in Procedure B and Procedure A will represent non-emulsified oils which are mainly contam
11、inating tramp oils. *When the mixture of dispersion and acid is thoroughly shaken, the reaction may cause the formation of a small amount of gas which results in a slight pressure in the flask, therefore, removal of the stopper should be done slowly with the mouth of the flask directed away from the operator. 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.
