FORD FLTM BV 002-2-2000 ABRASION ADHESION AND CORROSION RESISTANCE FOR CHIP RESISTANT COATINGS.pdf

1、 FORD LABORATORY TEST METHOD BV 002-02 Date Action Revisions 2000 11 14 Revised Editorial no t echnical change A. Cockman 1992 08 11 Printed copies are uncontrolled Page 1 of 5 Copyright 2000, Ford Global Technologies, Inc. ABRASION ADHESION AND CORROSION RESISTANCE FOR CHIP RESISTANT COATINGS Appli

2、cation These tests are used to determine adhesion and corrosion resistance properties of automotive chip resistant coatings when subjected to gravelometer and salt spray exposur es. Apparatus Required Oven A mechanical convection oven capable of obtaining 190 C metal temperature on CRLC steel 0.89 m

3、m within 8 - 10 minutes. (Blue M POM - 166A - GX or equivalent.) Force Gage A Hunter Spring Force Gage Model L - 10 or equivalent. Airless Spray Equipment As specified on Automotive Assembly Division drawings 70ZF - 5460 through 70ZF - 5469. Gravelometer As specified in SAE J400. Salt Spray Cabinet

4、As specified in ASTM B 117. Steel Panels The substrates shall be 100 x 300 x .89 - 1.06 mm body steel panels of each of the following: 1. Phosphated CRS: Ford approved “Paint Test Quality“ (PTQ), phosphated per ESB - M3P1 -A. 2. Phosphated Galvanized CRS: Parker - minimum spangle, temper rolled, pho

5、sphated per ESB - M3P1 - A. 3. Steel - Sheet, zinc rich primer: ESB - M1A217. 4. Electrocoat Primed Phosphated CRS: ESB - M64J19 primer electrocoated per FLTM BI 020 - 01. FORD LABORATORY TEST METHOD BV 002-02 Page 2 of 5 Copyright 2000, Ford Global Technologies, Inc. Conditioning and Test Condition

6、s 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 under the same conditions unless otherwise specified. Procedure 1. Prepare panels as described in Table

7、1, 2 or 3. 2. Scribe an “X“, with approximately 100 mm legs, through to base metal on the top portion of all prepared panels. 3. Condition panels for 72 h at 23 C, then check coating adhesion before environmental exposure. Evaluate the adhesion by cutting a 25 x 100 mm ribbon along the bottom edge o

8、f th e panels. Insert the tip of a squared spatula under the 25 mm sealer edge to provide a grasping tab. Clamp a Hunter Force Gage to the ribbon tab and attempt to peel at a 120 angle. Adhesion shall be determined by pulling tab at a minimum rate to detect sealer adhesive or cohesive failure. 4. Su

9、bject the bottom portion of the 0.5 mm coated panels to 4.5 - 4.91 of gravel. Examine panels for coating retention loss. 5. Expose all panels to 1000 h salt spray per FLTM BI 003 - 01. 6. After salt spray exposu re, allow the panels to dry at 23 C for 48 h and then re - evaluate adhesion as describe

10、d in para 3. Remove the coating from the lower half of the test panels and along the scribed area. Examine for evidence of corrosion and corrosion extension from the s cribe. Chemicals, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is respo

11、nsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BV 002-02 Page 3 of 5 Copyright 2000, Ford Global Technologies, Inc. ABRASION ADHESION AND CORROSION RESISTANCE FOR CHIP RESISTANT COATINGS TABLE 1 PANEL PREPARATION FOR BODYSIDE CHIP RESISTANT COATINGS Coa

12、ting Film Thickness (Airless Spray Applied) Sealer/ Primer Bake Schedule (Metal Temperature) Coating Applied Over Substrate 0.5 mm (0.02 in.) 1.2 mm 0 (0.05 in. 0) Primer ESB - M6J119 Apply 19 m (0.00075 in.) Wet Primer on Wet Coating* 8 min. at 135 C 50 min. at 165 C White ESB - M50J100 Apply 38 m

13、(0.0015 in.) Flash 15 min. Top Coat Bake Schedule (Metal Temperature) 6 min. at 124 C Phosphated CRS X X X X X X X X X X X X Phosphate Galvanized X X X X X X X X X X X X E/coat X X X X X X X X X X X X * Air dry the coating for 15 min. at 2 3 C prior to primer application. FORD LABORATORY TEST METHOD

14、 BV 002-02 Page 4 of 5 Copyright 2000, Ford Global Technologies, Inc. ABRASION ADHESION AND CORROSION RESISTANCE FOR CHIP RESISTANCE COATINGS TABLE 2 PANEL PREPARATION FOR UNDERBODY CHIP RESISTANT COATING Coating Film Thickness (Airless Spray Applied) Sealer/ Primer Bake Schedule (Metal Temperature)

15、 Coating Applied Over Substrate 0.5 mm (0.02 in.) 1.2 mm 0 (0.05 in. 0) Primer ESB - M6J119 Apply 19 m (0.00075 in.) Wet Primer on Wet Coating* 8 min. at 135 C 50 min. at 165 C Phosphated CR S X X X X X X X X Phosphate Galvanized X X X X X X X X Zincronmetal X X X X X X X X E/coat X X X X X X X X *

16、Air dry the coating for 15 min. at 23 C prior to primer application. FORD LABORATORY TEST METHOD BV 002-02 Page 5 of 5 Copyright 2000, Ford Global Technologies, Inc. ABRASION ADHESION AND CORROSION RESISTANCE FOR CHIP RESISTANCE COATINGS TABLE 3 PANEL PREPARATION FOR REPAIR CHIP RESISTANT COATING Co

17、ating Film Thickness (Airless Spray Applied) Top Coat Bake Sche dule (Metal Temperature) Coating Applied Over Substrate 0.5 mm (0.02 in.) 1.2 mm 0 (0.05 in. 0) 6 min. at 124 C 20 min. at 165 C Primer ESB M6J57* Apply 25 m (0.001 in.) Flash min. White ESB - M50J100 Apply 38 m (0.0015 in.) Flash 15 mi

18、n. Top Coat Bake Schedule (Metal Temperature) 6 min. at 124 C Phosphated CRS X X X X X X X X X X X X Phosphate Galvanized X X X X X X X X X X X X E/coat X X X X X X X X X X X X * Apply 0.5 mm (0.02 in.) of ESB - M4G201 to phosphated CRS panels. Bake coating at 135 C for 8 min.metal temperature, scuff sand and solvent wipe (M14J147) ESB - M4G201 surface prior to repair material application. * Air dry the coating for 15 min. at 23 C prior to primer application.