1、 FORD LABORATORY TEST METHODBI 107-05Date Action Revisions 2009 02 03 Revised Deleted acceptance criteria, added noting time C. McComb, FNA 2008 09 25 Revised Revised Title C. McComb, FNA 1996 05 22 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 8 THERMAL SHO
2、CK TEST FOR COATING ADHESION Application This procedure is used to determine the resistance to coating adhesion loss of coated surfaces of aluminum, plastic, steel, and other substrates when subjected to a wet blast similar to that produced by vehicle wash equipment. Apparatus and Materials Required
3、 Film Thickness Gauge per Ford Laboratory Test Method BI 117-01 Carbide Tip Scribe CTS (General Scribe #CM 88) - or equivalent 12015 Telegraph Rd. Detroit, Michigan U.S.A. (313) 531-7668 Utility Knife Stanley, Quick Point 10-300 - or equivalent (break away tips) Water Immersion Tank Per Ford Laborat
4、ory Test Method BI 104-01 Note: Thermal shock testing requires: a. 38 +/- 2 C water temperature b. 5 ppm maximum dissolved solids Heater/Circulator Fisher Scientific 13-874-70J - or equivalent Dissolved Solids Meter Myron L Company - or equivalent 833 East Broadway San Gabriel, California Freezer Ca
5、pable of minus 29 +/- 2 C temperature FORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 8 Steam Generator a. Input flow of water to be 2.7 +/- .1 L/min (*). b. Nozzle diameter to be 12.5 +/- .3 mm ID and at least 100 mm long.
6、c. Discharge dynamic head to be 37.9 +/- 1.9 kPa measured 25 mm from the nozzle using a 4.7 mm ID tube. A substantially non-diverging discharge is required for this test (*) (*) (see Figures 1 and 2). Note: Electro-Magic Model 100 (and the earlier Model 60) Steam Generator available only from: Atomi
7、c Cleaning Systems, 31651 West Eight Mile Road, Livonia, MI 48150, Phone: (248) 615-4400, has been found to be satisfactory. The Model 100 or Model 60 are no longer manufactured directly by Electro-Magic. However, Atomic Cleaning Systems is capable of modifying new Electro-Magic models to meet the M
8、odel 100 specifications required for this test. Milwaukee 1/2 inch globe valve No. 1151-1161, 150 SWP 300 WOg is adequate for use in standardization of generator. Model 100 Steam Generator (*) The pumping pressure is directly related to the input flow rate. The pressure needed for the required flow
9、can be determined by measuring the pump pressure and discharge flow rate with the burner off. When the burner is turned on, the required flow rate is obtained by readjusting to the required pump pressure. (*) This is done by placing the tube midstream 25 mm from the nozzle. The tube size must not be
10、 varied because the densities and velocities are not uniform throughout the cross section of the discharge stream. (*) Adjusting the discharge dynamic head may be required. This must be done in such a way that the input flow rate as specified in Para (a) above is maintained. This is done by adjustin
11、g the amount of heat transferred to the water. Increasing the heat will cause the flow rate (pressure) of (a) to change. It must be readjusted. This operation will result in an increased dynamic pressure; to decrease it, decrease the heat and then adjust the flow (pressure). Thermometer Capable of m
12、easuring 100 +/- 2 C Face Mask Full face cover safety mask is required when performing this test. Gloves Gauntlet-type gloves for protection of hands are required. Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/-
13、 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. FORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 8 Procedure 1. Standardize the Mo
14、del 60 or Model 100 Steam Generator. a. Measure and maintain the input flow at 2.7 L/min. Install a 12.5 mm globe valve in the steam line between coil weld assembly and a 5/32 inch hose nipple. With burner off, engage pump and adjust globe valve until 2.7 L/min is obtained. Record the tank pressure
15、that is obtained with the 2.7 L/min flow rate. (This induced back pressure simulates the pressure that steam exerts on the system while the burner is on.) b. Measure and maintain the mean dynamic head at 37.9 kPa (5.5 psi) using the fixtures as described in Figures 1 and 2. Open globe valve and turn
16、 on the burner. Allow tank pressure to stabilize before reading the mean dynamic head. Adjustments of the dynamic head are to be made by changing the amount of heat transferred to the water at the burner. (The flow rate, as specified above, must be maintained.) c. Measure and maintain a 98 +/- 2 C t
17、emperature of the steam blast at the test site distance. 2. Measure film thickness per Ford Laboratory Test Method BI 117-01 at proposed test sites and record. 3. Immerse the parts or panels (previously prepared per Engineering Materials Specification) in the water immersion tank for four hours at 3
18、8 +/- 2 C. Aerate the water by placing 6.5 mm ID plastic tube at the bottom of the tank and bubble air at a rate of one bubble per second minimum. Maintain a 5 ppm maximum dissolved solids (as NaCl) in the water. Check and record NaCl level using a dissolved solids meter. 4. Remove the samples after
19、 four hours of water immersion and cut an “X“ through the coating into the substrate across the panel or part where feasible (see Figure 3). a. Use a scribe to make the cut if the substrate is metal or hard, rigid plastic. b. Use a utility knife to make the cut if substrate is an elastomeric materia
20、l. 5. Place the test samples in a freezer at minus 29 +/- 2 C for a three hour minimum freeze cycle. 6. Within 30 seconds from freezer removal, direct the steam blast at the center of the “X“ cut, at a distance of 2 to 3 inches and 45 to the sample, in the direction shown in Figure 3. Note: High pre
21、ssure wet steam represents a potential safety hazard. Not only is it necessary to secure the samples properly, but full face protection and gloves are required. 7. After 30 seconds, record area (mm2) of coating removal by visually measuring with a metric ruler (typical triangular coating removal: Ar
22、ea = 1/2 Base x Height). Also examine the surface and report any blushing, whitening, or loss of gloss. 8. If a failure occurs, note number of seconds after steam black initiated that the failure occurred. Chemicals, materials, parts, and equipment referenced in this document must be used and handle
23、d properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 8 ATTACHMENT ONE RATING SCALE FOR THERMAL SHOCK TEST PANELS RATING PEEL BACK 20
24、 = No removal 19 = 9.5 cm2 SEE SPECIFICATION FOR ACCEPTANCE CRITERIA RATINGFORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of 8 THERMAL SHOCK TEST FOR PAINT ADHESION Figure 1 FORD LABORATORY TEST METHODBI 107-05Printed copies a
25、re uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 6 of 8 THERMAL SHOCK TEST FOR PAINT ADHESION Figure 2 FORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 7 of 8 THERMAL SHOCK TEST FOR PAINT ADHESION Figure 3 FORD LABORATORY TEST METHODBI 107-05Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 8 of 8 THERMAL SHOCK TEST FOR PAINT ADHESION Figure 4
