1、 FORD LABORATORY TEST METHODBI 106-01Date Action Revisions 2010 03 16 Revised Updated wording & added Method “E“ J. Crist 2002 07 15 Revised Rev Adhesion Tape para L. Graham 1992 01 28 Released Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 1 of 8 COATING ADHESIO
2、N TEST Application This method is used to measure the relative adhesion of coatings to steel, aluminum, galvanized steel, plastic, or other substrates. Apparatus Required Knife A knife of good quality is required for Method “A“, “C“, “D“ and “E“ of this procedure as outlined for scratch test. It mus
3、t have a 65 - 75 mm long blade and be 10 mm wide. Scriber A carbide-tipped scriber must be used in Method “B“ of this procedure for the scriber test. Source: Aircraft Specialties, Inc. (#90C) G.T.S. Co. (General Scriber #CM88) P.O. Box 98 12015 Telegraph Rd. Lapeer, MI 48446 U.S.A. Redford, MI 48239
4、 U.S.A. (303) 664-2981 (313) 531-7666 James Neill Tools (Eclipse Model 225) or equivalent James Neill Sheffield Ltd. Sheffield S11 8 HB U.K. Materials Required Panels See FLTM BI 103-02 for panel preparation. Adhesion Tape No. 898 (Minnesota, Mining and Manufacturing Co. - 3M) 25 mm wide. -or- An Eq
5、uivalent tape can be used if agreed upon by Materials Engineering as long as the Adhesion Strength is greater or equal to the 3M 898 tape (80N/mm per ASTM D 3330) Store in the original package in a dry, dark location. The shelf life of these tapes is 12 months. FORD LABORATORY TEST METHODBI 106-01Pr
6、inted copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 2 of 8 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 testi
7、ng and tested under the same conditions unless otherwise specified. Procedure 1. When the coating adhesion test is required after another test procedure, the adhesion test must be performed within 30 minutes of the previous test or as otherwise specified by the applicable Engineering Material Specif
8、ication. 2. Measure and record film thickness, prior to adhesion test in accordance with FLTM BI 117-01. 3. Remove all loose debris (brush off) from the scribe line prior to tape test. Method “A“ - Scratch Test 1. On an unmarked section of the test panel, draw the knife blade across the panel for a
9、distance of 50 mm with sufficient pressure to remove a narrow ribbon of coating down to the base metal. The flat part of the blade should be inclined away from the operator at an angle of approximately 30 to the panel and drawn towards him/her to remove the ribbon of coating. 2. Examine and report a
10、ny flaking or chipping or coating away from the scratch marks. Method “B“ - Scribe Test 1. Scribe lines through the coating to the base material as shown: The scribed lines shall be 3 mm apart, at right angles and diagonally in one direction. FORD LABORATORY TEST METHODBI 106-01Printed copies are un
11、controlled Copyright 2010, Ford Global Technologies, Inc. Page 3 of 8 2. 3M No. 898 tape shall be applied by pressing firmly and removing within 90 +/- 30 s of application by pulling it off rapidly (not jerked) back upon itself at as close to an angle of 180 to the panel as possible. 3. Observe and
12、report occurrence of chipping, flaking or general poor adhesion as noted after removal of tape. (Refer to Adhesion Classification Test Table). Method “C“ - Parallel Scratch Test 1. Draw the knife blade across the test panel at an angle of 90 to the specimen for a length of 50 mm or as long as possib
13、le with sufficient pressure to cut through the coating down to the base material. The knife blade should be drawn towards the operator. Draw a second parallel line in the same way 2 mm apart from the first. 2. Apply tape over the drawn lines in a parallel direction using firm finger pressure to ensu
14、re contact with the panel surface (i.e., drawn lines to be visible). 3. Remove the tape within 90 +/- 30 s of application by pulling back rapidly (not jerked) back upon itself at as close to an angle of 180 to the panel as possible. 4. Report occurrence of chipping, flaking, or general poor adhesion
15、 as noted after removal of tape. Plastic and glass-fiber substrates may also fracture. In the absence of loss of coating adhesion such chipping shall be ignored. Method “D“ - Adhesion Test for Flexible Coatings Note: This method will prevent the bridging of the tape between the scribe lines that occ
16、ur when the small grid is used. 1. Draw the knife blade on the coating to be tested as illustrated below. The grid should be approximately 25 mm wide with sufficient pressure to cut through the coating down to substrate. 2. Place the tape over the grid parallel with the long points of the diamonds a
17、s indicated by the arrow. 3. Conduct the test as in Steps 2 and 3 of Method B. FORD LABORATORY TEST METHODBI 106-01Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 4 of 8 FORD LABORATORY TEST METHODBI 106-01Printed copies are uncontrolled Copyright 2010, Ford Globa
18、l Technologies, Inc. Page 5 of 8 Method “E“ Adhesion Test for Parting Lines, Radius, Edges (i.e. Fascia) 1. Draw the knife blade at or as close to the parting line/radius/edge as possible, in a parallel direction to the parting line, for a length of 25 mm minimum, with sufficient pressure to cut thr
19、ough the coating down to the substrate. 2. Draw repeated parallel lines in the same way 2 mm apart from the first, onto the class A as well as onto the class B (i.e. attachment tab areas) of the fascia. The distance onto the class A should a length of 25 mm minimum. 3. Draw the knife blade perpendic
20、ular to the scribe lines indicated in steps 1 and 2, in 2mm increments to complete the box pattern, with sufficient pressure to cut through the coating down to the substrate. Reference Figure below. 4. Apply 3M No. 898 tape perpendicular to the parting line/ radius/edge, so that the tape covers the
21、box pattern, and follows the contour of the part. 5. Press the tape firmly using firm finger pressure to ensure contact with the coated surface, so that the knife blade lines are visible when looking at the tape. 6. Remove the tape within 90 +/- 30 seconds of application by pulling back rapidly (not
22、 jerked), starting from the class B and pulling towards class A. Pull tape perpendicular to the parting line. Reference Figure below. 7. Observe and report occurrence of chipping, flaking, or general poor adhesion as noted after removal of tape. Figure class B Parting Line/Radius/Edge Tape Pull Dire
23、ction 25mm2mmFORD LABORATORY TEST METHODBI 106-01Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 6 of 8 ADHESION TEST CLASSIFICATION (for Method B) Classification of Scribe Adhesion Tests FORD LABORATORY TEST METHODBI 106-01Printed copies are uncontrolled Copyrigh
24、t 2010, Ford Global Technologies, Inc. Page 7 of 8 ADHESION TEST CLASSIFICATION (for Method B) Classification of Scribe Adhesion Tests (cont.) FORD LABORATORY TEST METHODBI 106-01Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 8 of 8 ADHESION TEST CLASSIFICATION (for Method B) Classification of Scribe Adhesion Tests (cont.)
