FORD FLTM BI 127-01-2017 EDGE COVERAGE TEST FOR ELECTROCOAT MATERIALS.pdf

1、 FORD LABORATORY TEST METHOD BI 127-01 Date Action Revisions Rev. 02 2017 05 03 Revised Replaced salt spray with L-467 A. Wedepohl, NA 2001 03 20 Revised Editorial no technical change A. Cockman 1995 06 29 Controlled document at www.MATS Copyright 2017, Ford Global Technologies, Inc. Page 1 of 2 EDG

2、E COVERAGE TEST FOR ELECTROCOAT MATERIALS Application This method is used to test the ability of electrocoat materials to cover sharp metal edges. The knife blade is used as a controlled surrogate edge for the sheared edges of metal stampings and the edges of punched holes. This FLTM can be used to

3、show the difference between standard e-coat and high edge e-coat. Apparatus and Materials Required Electrocoat Bath and Coating Apparatus Knife Blades Steel break-away knife blades Nominal dimensions Source 1: Item # 29175 ACT Test Panels LLC 273 Industrial Drive Hillsdale, MI 49242 Phone: 1-517-43

4、9-1485 Source 2: Equivalent blades from other sources are allowed when approved by Ford Materials Engineering. Corrosion chamber As specified in CETP 00.00-L-467 Magnifying Microscope or Lens 30x Power E-coat cure window from E-coat manufacturer. Procedure 1. Clean and zinc phosphate 3 knife blades

5、per standard process guidelines from the phosphate supplier. Visually inspect the hardened steel blade edge for phosphate coverage. Reject any blades with a shiny appearance which indicates a lack of phosphate. 100 mm 17 mm FORD LABORATORY TEST METHOD BI 127-01 Copyright 2017, Ford Global Technologi

6、es, Inc. Page 2 of 2 2. Electrocoat knife blades to target film build specified in the relevant material specification. If not stated the target is 25 +/- 3 microns. 3. The blades should be completely electrocoated by suspending them from the hole with a paper clip and coating them to the target fil

7、m build. 4. Blades should be coated in triplicate for each variable under consideration. 5. Bake 3 blades at the minimum temperature listed for the 20 minute duration on the cure window. Total bake time should be 25 minutes unless the blades are known to require more or less time to achieve this par

8、t metal temp. Bake 3 blades at the maximum temperature listed for the 20 minute duration on the cure window. Total bake time should be 25 minutes unless the oven is known to require more or less time to achieve that part metal temp for the blades. 6. Visually inspect and mark any visible burrs or de

9、fects in the blade edge with a paint pen as these are potential initiation sites for corrosion formation which are unrelated to edge corrosion. 7. Blades are placed in the L-467 chamber for the Wednesday to Monday morning cycle corresponding to Showroom, high corrosively. Blades must be at 90 to the

10、 horizontal with the sharp edge straight up and totally exposed. 8. After test, rinse with D.I. water and allow to air dry. Do not wipe blades. 9. Count the number of rust spots along the sharp edge using a 30x power microscope. Report the individual and average for the three blades. Ignore rust spots at areas that were previously marked for burrs or edge defects. 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.