1、 FORD LABORATORY TEST METHODBL 106-01 Date Action Revisions 2010 08 10 Revised See Summary of Revisions A. Reaume, NA 2010 03 16 Activated A. Reaume, NA Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 2 STAGNANT COOLANT TEST FOR ALUMINUM AND FLUORINE AND ITS E
2、FFECT ON ALUMINUM CORROSION UNDER HEAT REJECTING CONDITIONS Application This method is used to 1) prepare a soluble solution of aluminum and fluorine in engine coolant under stagnant conditions and 2) measure the effect of this solution on the corrosion of aluminum under heat rejecting conditions us
3、ing ASTM D4340. Equipment Required 1. Oven: capable of 90C, holding automotive heat exchangers and vented to the outside 2. Rubber plugs: size and number depends on the heat exchanger (all openings to be plugged) 3. Aluminum foil pieces 4. Screw clamps: size and number depends on the heat exchanger
4、(intent is to keep the plugs in place 5. Bin: large enough to hold the heat exchangers, to capture any lost coolant 6. Glass graduated cylinder with glass or Teflon stopper: 1000 ml 7. Refractometer 8. Glass stirring rod 9. Fresh/unused coolant concentrate 10. Aluminum engine cooling system componen
5、t with the exception of the engine and water pump. Example is the heat exchanger with known internal fluxing as part of the controlled atmosphere brazing process (e.g. Nocolok potassiumaluminofluorinate flux). Note: More than 1 heat exchanger may be required for stagnation testing because the volume
6、 of coolant required for post-stagnation testing is 1.25L) - Report of the internal volume of the heat exchanger - Report of the internal surface area of the heat exchanger 11. De-ionized or distilled water 12. Plastic samples bottles: 2 X 250ml, and 1 X 1L 13. Full face shield, gloves, and other re
7、quired safety equipment 14. Equipment required to perform ASTM D4340 FORD LABORATORY TEST METHODBL-106-01 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 Procedure 1. Mix 500 ml of fresh coolant concentrate with 500 ml de-ionized or distilled water in gradua
8、ted cylinder to achieve 50/50 +/- 2% concentration (coolant added first, water on top). Install glass stopper and mix coolant and water for 20 seconds, back and forth action. 2. Verify concentration 48 to 52% with refractometer (use glass stirring rod to put drops of mixture). 3. Mix coolant and wat
9、er as in step 1 until there is enough coolant for: 1L pre-test baseline coolant for ASTM D4340 testing; 250ml coolant samples for pre-test (baseline) coolant analysis; Filling aluminum component(s) to obtain 1.25L post-test coolant. 4. Fill aluminum component(s) with 50/50 coolant / de-ionized water
10、 mixture,; 5. Repeat steps 1-4 until heat exchanger is nearly full (allow some room for coolant expansion in the oven); 6. Plug heat exchanger with rubber plugs, cover with foil and install screw clamps over foil; 7. Put heat exchanger into 90C oven for 2 weeks, and monitor every few days to make su
11、re there is not a large loss of coolant (more than 10% of volume); 8. Take 250ml coolant sample post-test. Use refractometer to get post-test coolant concentration; 9. Provide 250 ml coolant samples (pre- and post-test) to PTI Cooling Product Engineering (for informational purposes only); 10. Provid
12、e 1L pre-test and 1L post-test coolant samples to PTI Cooling Product Engineering for testing per ASTM D4340 (Standard test method for corrosion of cast aluminum in engine coolant under heat rejection conditions); 11. Remove remainder of coolant from the heat exchanger(s). Retain heat exchanger(s) a
13、nd coolant remains for 60 days. 12. Final report to include Results of ASTM D4340 for pre-test coolant and post-test coolant per ASTM D4340. Aluminum corrosion rate greater than 1.0 mg/cm2/wk is unacceptable. Note: Chemicals, materials, parts, and equipment referenced in this document must be used a
14、nd handled properly. Each party is responsible for determining proper use and handling in its facilities. Summary of Revisons: Changed radiator to aluminum heat exchanger; changed heat exchanger to aluminum component in cooling system except engine and water pump Added details about Controlled atmosphere brazing Nocolock flux Added ASTM D4340 of pre-test coolant Added internal surface volume of heat exchanger and internal coolant volume of heat exchanger Added coolant analysis “for informational purposes only“
