1、FORD LABORATORY TEST METHOD BV 151-01 Date Action 2001 10 31 Revised 2000 08 11 Revised 1990 05 24 COLD ADHESION TEST FOR SPRAY DEADENERS AND UNDERCOATING Revisions Editorial - no technical change Editorial - no technical change A. Cockman A. Cockman Application This procedure is used to determine t
2、he adhesion properties of spray deadeners and undercoating materials when subjected to impact at low temperature. Apparatus Required Laboratory Forced Air Circulation Oven Capable of maintaining temperatures up to 250 +/- 2 O C. Cold Box Capable of maintaining a temperature of - 40 +/- 2 OC. accommo
3、date the fixture during the slamming test. The box must be large enough to Balance Accuracy +/- 0.5 g - maximum permitted load 3 kg. Impact Test Fixture See Sketches 2 and 3. The test fixture consists of an angle iron frame (Part 1) with a pivoting clamping fixture (Part 2) and an adjustable counter
4、 weight (Part 3) for balancing the various specimen weights. The load (Part 5) attached to the lever (Part 4) results in an impact force when hitting the frame (Part 1). The rung (Part 6) limits the highest position of the lever. Load A = 1 .O kg Load B = 2.5 kg Materials Required Test Panels Steel
5、body Skin Panels. Preparation as in Attachment 1. Dimensions - 300 x 300 x 1.5 +/- 0.10 mm Load A. (1 .O kg) Dimensions - 300 x 300 x 1.5 +/- 0.10 mm Load B. (2.5 kg) Surface Finish 0.8 - 1.9 micrometre C.L.A. Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BV 151-01 Conditi
6、oning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 OC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Procedure (3 specimens requ
7、ired if not otherwise specified) 1. 2. 3. 4. 5. 6. 7. 8. 9. 1 o. 11. The closed container of deadener or undercoating shall be conditioned for 24 h minimum at 23 +/- 2 OC prior to application. Determine the weight (W ) of the test panel, prepared in accordance with 1 Attachment 1, and mask off the t
8、op 20 mm of each panel where it fits into the clamping fixture. Spray the panel evenly with the test material to a wet film thickness in accordance with Attachment 1 or as specified by the applicable Engineering Material Specification. After an open time of 15 minutes at 23 +/- 2 OC, bake the panels
9、 in the oven, with forced air circulation, in accordance with Attachment 1 or as specified by the applicable Engineering Material Specification. Cool to 23 +/- 2 OC, remove masking tape, hold specimen at this temperature for 2 h and determine total weight of specimen (w). Insert specimen in the clam
10、ping fixture (with deadener or coating side outermost). Remove the load (part 5) and balance the specimen by means of the adjustable counterweight (part 3). Attach load A or BI, as required, to lever (part 4) and fix at a distance of 300 mm from pivot center (Figure 2). Place specimen and impact tes
11、t fixture in the cold box for a minimum of 3 h at the temperature specified by the applicable Engineering Material Specification. While still in the cold box, allow the lever to fall 6 times in rapid succession from a horizontal position. Remove specimen from cold box and condition for 16 h at 23 +/
12、- 2 O C. Remove any loose particles of test material and determine the weight (w3) of each specimen. Note: subjected to additional testing cycles according to steps 7, 8, 9 and 1 O. If required by the applicable Engineering Material Specification, the specimens may be Page 2 of 7 Copynght02001, Ford
13、 Global Technologies, Inc FORD LABORATORY TEST METHOD BV 151-01 Evaluation Calculate the percentage of material retained on each panel as follows: Retained material in % = w? - w1 x 100 WT w1 Where: w1 = weight of test panel. w2 = weight of test panel plus test material. w3 = weight of test panel pl
14、us test material after impact testing and removal of loose particles. 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. Page 3 of 7 Copynght02001, Ford Global
15、Technologies, Inc FORD LABORATORY TEST METHOD BV 151-01 COLD ADHESION TEST FOR SPRAY DEADENERS AND UNDERCOATING Preparation Sheet Panels Test Material Of Coating Wet Thickness Exposure Cycle Air-drying Type Materials BI 120-01 2.5 mm . 16 h at 23 +/- 2 OC Heat-drying type BI 120-01 Bitumen-based Mat
16、erials 2.5 mm . 20 minutes at 145 +/- 2 OC air temperature Stove-type Rubber- Bitumen Based Materials BZ 150-1 1 Oiling grade “Normal“ 2.5 mm . 25 minutes at 165 +/- 2 OC air temperature . 25 minutes at 165 +/- 2 OC air temperature . 20 minutes at 145 +/- 2 OC air temperature . Cool to 23 +/- 2 OC .
17、 Cool to 23 +/- 2 OC . Cool to 23 +/- 2 OC Page 4 of 7 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BV 151-01 COLD ADHESION TEST FOR SPRAY DEADENERS AND UNDERCOATING DIMENSIONS in mm Figure 1 Page 5 of 7 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST ME
18、THOD BV 151-01 COLD ADHESION TEST FOR SPRAY DEADENERS AND UNDERCOATING 00.0 I I I I I 1 I L L-340 .t- C DIMENSIONS IN mm Figure 2 / / STEELPLATE -160 O+ LOAD Page 6 of 7 Copynght02001, Ford Global Technologies, Inc FORD LABORATORY TEST METHOD BV 151-01 COLD ADHESION TEST FOR SPRAY DEADENERS AND UNDERCOATING TEST SPECIMEN “ WING M6x -SCREW 18 DIN 316 g 4D 1- L 10.0 L250- I PART 2.1 M 1:l T 2.2 COAT SURFACE PART 2.3 -. 45.0 7 f I 4 23.0 Or+ -RUBBERSTRIP BONDED 3.0 a- l PART 2.2 MI 1 DIMENSIONS IN mm I x4 ICTION AA Figure 3 Page 7 of 7 Copynght02001, Ford Global Technologies, Inc
