1、 FORD LABORATORY TEST METHOD BI 106-01Date Action Revisions Rev 01 2017 05 31 Revised See Summary of Revisions J. Crist, NA 1992 01 28 Released Controlled document at www.MATS Copyright 2017, Ford Global Technologies, Inc. Page 1 of 8 COATING ADHESION TEST Application This method is used to measure
2、the relative adhesion of coatings to steel, aluminum, galvanized steel, plastic, or other substrates. Apparatus Required Knife A knife, razor blade, or scalpel of good quality is required for Methods A & C - E of this procedure. It must have at least a 65 - 75 mm long blade and be at least 10 mm wid
3、e. Scriber A carbide-tipped scriber must be used in Method “B“ of this procedure, unless otherwise specified in the specification. Source: General Tools & Instruments LLC (CM88 Tungsten Scriber) (http:/ Materials Required Panels See FLTM BI 103-02 for panel preparation or equivalent. Adhesion Tape N
4、o. 898 (Minnesota, Mining and Manufacturing Co. - 3M) 25 mm wide. -or- An equivalent 25 mm wide tape can be used if agreed upon by Materials Engineering as long as the Peel Strength is greater than 0.6 N/mm per ASTM D 3330, Method A. Store in the original package in a dry, dark location, and the she
5、lf life is 12 months. FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 2 of 8 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 speci
6、fied by the applicable Engineering Material Specification. 2. 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 distance of 50 mm with sufficient pressure to
7、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 any flaking or chipping or coating away from th
8、e 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 2.1 mm diagonally in one direction. Diagonal cut must intersect through one corner of the box to the other corner of the 3mm box sect
9、ion as shown above. If the part is too small for the above pattern the pattern can be modified with Ford Materials Engineering approval. FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 3 of 8 2. The tape shall be applied by pressing firmly and removing within
10、 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 report occurrence of chipping, flaking or general poor adhesion as noted after removal of tape. (Refer to Adhesion Classification Test Table). M
11、ethod “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 possible with sufficient pressure to cut through the coating down to the base material. The knife blade should be drawn towards the operator. Draw a s
12、econd 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 ensure 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 rapidl
13、y (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 as noted after removal of tape. Plastic and glass-fiber substrates may also fracture. In the absence of loss of coating adhesion such chipping
14、shall be ignored. Method “D“ - Adhesion Test for Flexible Coatings 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 wit
15、h the long points of the diamonds as indicated by the arrow. 3. Conduct the test as in Steps 2 and 3 of Method B. Note: This method will prevent the bridging of the tape between the scribe lines that occur when the small grid is used. FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global
16、Technologies, Inc. Page 4 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 throu
17、gh 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 perpendicul
18、ar 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 tape perpendicular to the parting line/ radius/edge, so that the tape covers the box pattern,
19、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 jerked), sta
20、rting 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 Direction 25mm 2m
21、m FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 5 of 8 ADHESION TEST CLASSIFICATION (for Method B) Classification of Scribe Adhesion Tests Classification Pictogram Description Grade O No Removal, chatter at scribe line allowed Grade 1 Less than 5% removed i
22、n each 3mm x 3mm square, no full triangle removed Grade 2 Approximately 5% removed in each 3mm x 3mm square, no full triangle removed Grade 3 Approximately 10% removed FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 6 of 8 Grade 4 Approximately 15% removed Gr
23、ade 5 Approximately 20% removed Grade 6 Approximately 25% removed Grade 7 Approximately 45% removed FORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 7 of 8 Grade 8 Approximately 60% removed Grade 9 Approximately 75% removed Grade 10 Approximately 95% removed F
24、ORD LABORATORY TEST METHOD BI 106-01Copyright 2017, Ford Global Technologies, Inc. Page 8 of 8 Summary of Revisions 2017 05 31 - Corrected tape equivalent requirements - Removed Film Thickness test requirement - Method B added dimensions of scribe area - Updated Pictures and description in Adhesion
25、Test Clarification section 9/19/2016 - Allowed Knife method for all methods A-E - Updated scriber source - Updated Adhesion Strength for equivalent tape 70N/100mm to 55 N/100mm - Removed reference to FLTM BI 117-01 - Method B added more scribe pattern detail 3/16/2010 - Added Equivalent Tape paragraph - Added Method E
