1、 FORD LABORATORY TEST METHOD BV 101-02 Date Action Revisions 2000 12 08 Revised Editorial no technical change A. Cockman 1992 10 20 Printed copies are uncontrolled Page 1 of 7 Copyright 2000, Ford Global Technologies, Inc. COLD ADHESION TEST FOR BODY SEALERS Application These procedures are used to
2、determine the adhesion properties of automobile body sealers and fillers when subjected to impact at a low temperature. A general test method is described and specific details for a particular type of sealer as designated by the material specification are listed in the attached test data chart. Thes
3、e test methods simulate production applications of each material in respect to aging, baking, and application of the sealer or filler. Apparatus Required Slamming The slamming fixture, shown in the attached sketch, is used to deliver a uniform impact to the test panels. Contact area of the panel dur
4、ing the slamming test is 13 mm on each side and bottom edge of the panel. The top of the panel enclosed by the jaws does not contact the fixture when slammed. Cold Box The cold box shall be large enough to accommodate the fixture during the slamming test. The box shall be capable of maintaining a te
5、mperature of - 29 +/- 2 C. Oven A mechanical convection oven capable of obtaining 190 C metal temperature on CRLC steel 0.89 mm within 8 - 10 minutes (Blue M POM-166A-GX or equivalent). Balance A laboratory beam balance or equivalent is required for weighing the panel and test material. Spray Booth
6、A spray booth is required when applying primer and enamel to the panels. Spray Equipment A Binks No. 19 gun with a 63B x 63PB nozzle combination and a No. 80-210 pressure cup is used for spraying primer and/or enamels to the panels. Other equivalent spray equipment may be used. Steel Test Panels The
7、 panels used in the test shall be flat 300 x 300 x 0.89 mm CRLC. FORD LABORATORY TEST METHOD BV 101-02 Page 2 of 7 Copyright 2000, Ford Global Technologies, Inc. Paper Cone The sealer may be extruded onto the test panel from a paper cone made from Kraft wrapping paper. The proper size bead may be ob
8、tained by cutting the orifice to the desired size with a pair of shears. Conditioning and Test Conditions All test values indicated herein are based on 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 un
9、der the same conditions unless otherwise specified. General Procedure The general procedure is applied as indicated in the lettered procedures listed in the Test Procedures. Use steps 1, 2 or 3 of the General Procedure for preparation of the panels, only as indicated in the chart. 1. Clean and phosp
10、hate coat the steel panels by passing them through the complete process used for automobile bodies. 2. Spray the panels with an automobile primer in current use for the automobile on which the filler will be used. Baking time and temperature shall be the same as current production processes. 3. Mask
11、 one-half of each panel and spray with a current production enamel over which the sealer will be used. NOTE: The panels prepared for this test shall be freshly prepared with both primer and enamel. Baking time and temperatures should follow current production processes. 4. Weigh each of the test pan
12、els and record the weight of each on the back of the panel with a grease pencil (see Test Procedures A through E). 5. Extrude the required amount of test material onto the panels (see Test Procedures A through E). 6. Air dry at 23 +/- 2 C for time indicated in Test Procedures A through E. 7. Bake in
13、 a mechanical convection oven for time indicated in Test Procedures A through E. 8. Cool to 23 +/- 2 C. Weigh and record weight if specified in Test Procedures A through E. Recorded weight minus weight of painted panel equals weight of dry test material. 9. Place panels and slamming fixture in the c
14、old box at - 23 +/- 2 C for a minimum of 3 h (a longer time does no harm). FORD LABORATORY TEST METHOD BV 101-02 Page 3 of 7 Copyright 2000, Ford Global Technologies, Inc. 10. Insert each panel in the slamming fixture with the filler or sealer facing out and in a vertical position. Drop from a horiz
15、ontal position 6 times in rapid succession. NOTE: If the panel has been previously weighed to determine the percentage of retained material, remove any loose particles of test material after the slamming operation. 11. The panels are given additional cycles of testing as required by the Chart. Each
16、cycle constitutes the following: a) Allowing the panels to reach 23 +/- 2 C and holding at this temperature for 2 additional hours. b) 3 h minimum in the cold box at - 23 +/- 2 C as in Step 9. c) Slamming each panel in rapid succession as in Step 10. 12. Allow the panels to dry overnight. 13. Weigh
17、each panel and calculate the percentage of retained material where necessary. Otherwise report as required by the material specification. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and
18、 handling in its facilities. FORD LABORATORY TEST METHOD BV 101-02 Page 4 of 7 Copyright 2000, Ford Global Technologies, Inc. FORD LABORATORY TEST METHOD BV 101-02 Page 5 of 7 Copyright 2000, Ford Global Technologies, Inc. TEST PROCEDURES Procedure A: No. of Panels 6 Preparation of Stamp or form a 2
19、50 x 37.7 x 6.3 mm depression in center of Panels each panel. Then follow steps 1 and 2 of general procedure. Weigh: Step 4 Application of Extrude filler into depression and level off. See Step 5. Material Air Dry 20 minutes as in Step 6 Bake, Cool, Weigh 30 minutes at 121 +/- 2 C, then 16 h at 43 +
20、/- 2 C. See steps 7 and 8. Slamming Cycles First cycle - steps 9 and 10. 3 additional cycles as in step 11; then steps 12 and 13. Procedure B: No. of Panels 3 Preparation of Panel (a) wet with light mineral oil. Panel (b) phosphate coat as Panels in step 1. Panel (c) phosphate coat and prime as in S
21、teps 1 and 2. Weigh No Application of Extrude 2 13 mm diameter x 250 mm long beads onto each Material panel. See step 5. Space the beads evenly on panels. Air Dry No Bake, Cool, Weigh M4G22A - 1.0 h at 116 +/- 2 C M4G22B - 0.5 h at 163 +/- 2 C M4G22C - 0.5 h at 190 +/- 2 C See steps 7 and 8 Slamming
22、 Cycle First cycle - steps 9 and 10. 5 additional cycles as in step 11, then step 13. FORD LABORATORY TEST METHOD BV 101-02 Page 6 of 7 Copyright 2000, Ford Global Technologies, Inc. Procedure C: No. of Panels 3 Preparation of Same as in procedure B above. Panels Weigh No Application of Extrude 2 5
23、mm thick x 25 mm wide x 250 mm long beads onto Material each panel. See step 5. Space the beads evenly on panels. Air Dry No Bake, Cool, Weigh 1 h at 121 +/- 2 C. See steps 7 and 8. Slamming Cycles First cycle - steps 9 and 10. 5 additional cycles as in step 11, then step 13. Procedure D: No. of Pan
24、els 3 Preparation of Phosphate coat, prime and enamel as in steps 1, 2 and 3 of Material general procedure. Weigh No Application of Extrude a ribbon 25 mm wide, 5 mm thick and 250 mm long onto Material each half of panel. 1 ribbon over primed and one over enameled surface. See step 5. Air Dry 16 h a
25、s in step 6. Bake, Cool, Weigh 24 h at 70 +/- 2 C. See steps 7 and 8. Slamming Cycle First cycle - steps 9 and 10. 5 additional cycles as in step 11, then step 13. FORD LABORATORY TEST METHOD BV 101-02 Page 7 of 7 Copyright 2000, Ford Global Technologies, Inc. Procedure E: No. of Panels 3 Preparatio
26、n of Prepare panel substrate as indicated by the material Panels specification. Omit steps 1, 2 and 3 of general procedure. Weigh No Application of Extrude a ribbon 25 x 200 mm at the thickness indicated by the Material material specification. Center ribbon on panel with the 200 mm dimension 25 mm above the bottom edge of panel. See step 5. Air Dry 1 h as in step 6. Bake, Cool, Weigh Bake schedule indicated by the material specification. See steps 7 and 8. Slamming Cycles Step 9 and 10 except condition at -29 +/- 2 C and slam 10 times, then step 13.
