FORD FLTM AZ 102-02-2000 PREPARATION OF SYNTHETIC ACIDIC AQUEOUS CONDENSATE《合成酸性含水冷凝物的制备》.pdf

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1、 FORD LABORATORY TEST METHOD AZ 102-02 Date Action Revisions 2000 08 22 Revised Editorial no technical change A. Cockman 2000 05 22 Editorial no technical change A. Cockman 1993 09 03 Printed copies are uncontrolled Page 1 of 2 PREPARATION OF SYNTHETIC ACIDIC AQUEOUS CONDENSATE Application This meth

2、od is used to prepare an aqueous mixture of organic and mineral acids simulating the acidic aqueous condensate that can form inside internal combustion engines. The solution is the n used in aging tests as specified in Material Specifications or on Engineering Drawings to assess the suitability of m

3、aterials for operation in such an environment. Equipment and Materials Volumetric Flasks 1000 mL capacity. Graduated Pipettes 20 mL g raduated pipette. 1 mL graduated pipette. Dark Glass Storage Bottles 1000 mL capacity. Electrochemical pH Meter Methanoic (Formic) Acid 98 - 100 % Glacial Ethanoic (A

4、cetic) Acid Hydrochloric Acid Specific Gravity: 1.18 Nitric Acid Specific Gravity: 1.42 Sulphuric Acid Specific Gravity: 1.84 FORD LABORATORY TEST METHOD AZ 102-02 Page 2 of 2 Copyright 2000, Ford Global Technologies, Inc. Conditioning and Test Conditions All test values indicated herein are based o

5、n material conditioned in a controlled atmosphere of 23 +/ - C and 50 +/ - 5 % relative humidity for not less than 24 h prior to tes ting and tested under the same conditions unless otherwise specified. Procedure 1. Add approximately 500 mL distilled water to a 1000 mL volumetric flask. Pipette the

6、following quantities of acid into the flask ensuring that the acid is thoroughly mixed and the pipette is cleaned after each addition: 14.0 mL Methanoic Acid 15.0 mL Ethanoic Acid 1.0 mL Hydrochloric Acid 11.0 mL Nitric Acid 1.0 mL Sulphuric Acid Add distilled water to make volume up to 1000 mL. 2.

7、Transfer the solution to a dark glass storage bottle and label “Synthetic Acid Condensate - Stock Solution“. Add the necessary acid warning labels. 3. Pipette 12.5 mL of the “Stock Solution“ into a 1000 mL volumetric flask and dilute to 1000 mL with distilled water. Check pH to ensure that it falls

8、within the range 2 - 3. Adjust as necessary by the addition of further “Stock Solution“ or distilled water. 4. Transfer this solution to a dark glass storage bottle and label “Synthetic Acid Condensate - Working Solution“. Add the necessary acid warning labels. 5. In use, the Working Solution shall

9、be regularly monitored for pH and fresh solution made up from the stock solution when the pH rises above 3. Chemicals, materials, parts, and equipment referenced in this document must be used and ha ndled properly. Each party is responsible for determining proper use and handling in its facilities.