1、 FORD LABORATORY TEST METHOD BV 119-01 Date Action Revisions 2000 12 11 Revised Editorial no technical change A. Cockman 1992 05 05 Printed copies are uncontrolled Page 1 of 3 Copyright 2000, Ford Global Technologies, Inc. ELECTROCOAT COMPATIBILITY TEST Application This method defines the process fo
2、r determining the compatibility of various manufacturing processing materials (i.e., drawing oils, blanking oils, anti-rust oils, etc.), and manufacturing materials (i.e., adhesives, sealants, etc.) with electrocoat primers. Apparatus Required Power Source A direct current power source which can be
3、adjusted between 0 - 1000 volts DC and 0 - 10 amp. Coating Tank A 18.9 litre electrically insulated metal container approximately 280 mm I.D. and 330 mm high. As an alternative, a 3.8 litre electrically insulated metal container approximately 165 mm I.D. and 190 mm high may be used. Laboratory Stirr
4、er 0 to 700 rpm, using a 460 mm long shaft with a 50 mm diameter square end single blade impeller. Oven A mechanical convection oven capable of obtaining 190 C metal temperature on CRLC steel 0.89 mm within 8 - 10 minutes (Blue M Model No. POM166A-6X or equivalent). Materials Required Steel Panels S
5、teel panels required for this test are 100 x 300 x 0.89 mm. They shall be phosphate coated to meet the requirements of Engineering Material Specification ESB-M3P1-A. (Panels which have not been newly phosphated should be dried at 120 C for 6 minutes prior to test material application to remove absor
6、bed moisture.) An alternative size panel 75 x 200 x 0.89 mm may be used. 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 testing and tested un
7、der the same conditions unless otherwise specified. FORD LABORATORY TEST METHOD BV 119-01 Page 2 of 3 Copyright 2000, Ford Global Technologies, Inc. Procedure A. Material Applied to Substrate Before Electrocoating 1. Processing of Control Panels to Verify Suitability of Bath Using phosphated steel p
8、anels and a sample of each electrocoat primer as specified in the Engineering Material Specification, prepare control panels per FLTM BI 120-01. There should be sufficient primer used to bring the level of the primer approximately 50 mm from the top of the coating tank. Electrocoat the panels and ba
9、ke at conditions necessary to meet the “moderate“ film build and minimum bake schedule electrocoat specification requirements. Examine panels for film smoothness and lack of cratering. If film is irregular or cratered, bath is not suitable for compatibility testing. 2. Preparation and Treatment of T
10、est Panels For each primer bath apply* a 25 x 100 x 1.5 mm ribbon of test material horizontally 25 mm above the 100 mm bottom edge of a phosphated steel panel. If a 75 x 200 x 0.89 mm panel is used, a 25 x 75 x 1.5 mm ribbon of test material should be comparably applied. *The method of application w
11、ill be dependent upon the viscosity and nature of the material involved. 3. Allow a minimum delay of 4 h and a maximum of 24 h from the time the test material is applied to the time the test panel is placed in the primer bath. 4. Place a test panel (with test material ribbon immersed) into each prim
12、er bath for 16 - 20 h. Keep baths under constant agitation (do not exceed 700 rpm) with the impeller blade approximately 25 mm from the bottom of the tank. Note: The stirring rpm should be controlled to avoid foaming or spillage of the electrocoat. 5. Electrocoating and Baking of Test and Control Pa
13、nels After the 16 - 20 h immersion period for the test panels, electrocoat (per FLTM BI 120-01) each test panel (along with an additional phosphate steel control panel) and bake. One test panel and one control panel should be processed in each bath. 6. Comparison of Test and Control Panels Compare t
14、est panels and control panels. Examine panels for primer film irregularities and material compatibility. FORD LABORATORY TEST METHOD BV 119-01 Page 3 of 3 Copyright 2000, Ford Global Technologies, Inc. B. Bath Contamination 1. Processing of Control Panels to Verify Suitability of Bath Using phosphat
15、ed steel panels and a sample of each electrocoat primer as specified in the Engineering Specification, prepare control panels per FLTM BI 120-01. There should be sufficient primer used to bring the level of the primer approximately 50 mm from the top of the coating tank. Electrocoat the panels and b
16、ake at conditions necessary to meet the “moderate“ film build and minimum bake schedule electrocoat specification requirements. Examine panels for film smoothness and lack of cratering. If film is irregular or cratered, bath is not suitable for compatibility testing. 2. Contamination of Bath Add 5 g
17、 of test material to bath and place bath under constant agitation for 16 - 20 h. Impeller blade should be approximately 25 mm from the bottom of the tank. Do not exceed 700 rpm. 3. Electrocoating and Baking of Test Panel After the 16 - 20 h immersion period, electrocoat a phosphated steel panel (per
18、 FLTM BI 120-01) and bake as in Step 1 above. 4. Comparison of Test and Control Panels Compare test panels and control panels. Examine panels for primer film irregularities and material compatibility. 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.
