1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 3 2011 07 13 Revised Odor Requirement added W. Janitschke, EU 2009 10 15 N-STATUS A2, Replaced by global strategy B. Witkowski, NA 1995 03 22 EP00E10428888000 Released W. Scholz Controlled document at www.MATS Copyright 2011, Ford Global
2、 Technologies, LLC Page 1 of 7 SEALER, VINYL, HEAT CURING, AIRLESS SPRAYABLE, WSK-M4G334-A2 SOLVENT RELEASE, PRIMER OVEN CURING NOT TO BE USED FOR NEW DESIGN SEALER, VINYL, HEAT CURING, AIRLESS SPRAYABLE, WSK-M4G334-A3 SOLVENT RELEASE, PRIMER OVEN CURING 1. SCOPE The materials defined by these speci
3、fications are solvent release, airless sprayable, heat curing, polyvinylchloride based sealer with high abrasion and good corrosion resistance. 2. APPLICATION These materials were originally released for both sealing of interior and exterior joints and for non-visible areas of underbody coating and
4、wheel arch. The material is applied to electrocoated surfaces using airless spray equipment or tube gun wet in wet with current production spray primer. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS Material suppliers and part producers must conform to the Companys Standard Requirements Materials (WSS-M
5、99P1111-A). Part producers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.2 TEST PANEL PREPARATION 3.2.1 Use 300 x 100 x 0.8 - 0.9 mm E-coated test panels acco
6、rding to FLTM BI 120-01. The sealer must be applied on the cured E-coated test panel within 30 minutes after oven curing. 3.3 COLOR As specified On Engineering Drawing 3.4 SOLIDS WSK-M4G334-A2: 96% min (FLTM BV 150-10) WSK-M4G334-A3: 94% min 3.5 ASH 35% max (FLTM BV 150-10) 3.6 FLASHPOINT 100 C min
7、(ASTM D 93, Method A) Note: If testing at higher temperatures is not feasible because of gelling of test material, the supplier must certify in writing that each separate volatile ingredient has a flash point above 100 C. ENGINEERING MATERIAL SPECIFICATION WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011,
8、 Ford Global Technologies, LLC Page 2 of 7 3.7 DENSITY AT 23 C 1.48 kg/L max (ASTM D 1475) The weight tolerance for any one supplier shall be 0.05 kg/L, based on the recorded weight of the original approved sample. 3.8 VISCOSITY AT 23 C (FLTM BV 103-01, 275 kPa line pressure, nozzle diameter 2 mm) 3
9、.8.1 As Received 3 - 20 s 3.8.2 After Aging, max 100 s max (WSK-M4G334-A2: 336 h at 30 +/- 2 C) (WSK-M4G334-A3: 336 h at 40 +/- 2 C) Note: Final approval of a specific viscosity of material for production shipments shall be made by the affected Manufacturing Division. In all cases, however, the visc
10、osity shall be within the limits specified above and the material shall meet all requirements of this specification. 3.9 SURFACE CONDITION After curing the material shall be dry to the touch after cooling to 23 +/- 2 C. It shall be free from bubbles and shall show no evidence of chipping or cracking
11、. Bend the sample through an angle of 90 degrees within 2 s around a 50 mm diameter mandrel. Test Method: Test panels per para 3.2.1 shall be coated with the material under test in such a manner (airless) that after the min. and max. curing cycle. WSK-M4G334-A2: According to FLTM BV 150-05, Table 2,
12、 a dry coating thickness of 0.5 - 0.65 mm is obtained. WSK-M4G334-A3: a) two times 9 minutes at 140 +/- 2 C b) two times 9 minutes at 170 +/- 2 C 3.10 ABRASION RESISTANCE (ASTM D 968) There shall be no exposed metal area showing after 300 L gravel impact. No loss of adhesion on and around the area o
13、f stone impact. Panel Preparation: - Test panels per para 3.2.1 shall be coated with the material under test in such a manner (airless) that after curing a dry coating thickness of 0.5 - 0.65 mm is obtained. - After 10 minutes at 23 +/- 2 C, coat specimens wet on wet with current production spray pr
14、imer, at a dry film thickness of 0.010 - 0.015 mm. ENGINEERING MATERIAL SPECIFICATION WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011, Ford Global Technologies, LLC Page 3 of 7 - After 10 minutes at 23 +/- 2 C, spray separate specimens with light colored standard and metallic base/clearcoat. Cure specime
15、ns separately with min. and max. curing cycle according to FLTM BV 150-05, Table 2: - Condition for 2 h at 23 +/- 2 C and expose in mechanical convection oven maintained at 70 +/- 2 C for 120 h. Test Method: - After conditioning for 24 h at 23 +/- 2 C, determine the abrasion resistance (ASTM D 968,
16、except I.D. of tube, 25 mm, and at a gravel throughput rate of 30 - 40 L/h. For each specimen a 5 L volume of fresh gravel shall be used. - Check for abrasion resistance and loss of adhesion after 300 L gravel impact. Continue abrasion test until exposure of metal area and again check for loss of ad
17、hesion. GRAVEL: Type “GABRO“ grain size 5 - 8 mm Supply Source: Odenwalder Hartstein Industrie Gmbh Lise-Meitner Str. 35 D 63457 Hanau 3.11 CORROSION RESISTANCE (ASTM B 117) The material shall protect the test panel from corrosion for a salt spray exposure period of 500 h. It shall show no expansion
18、, flaking or loss of abrasion resistance. No loss of adhesion on and around the area of stone impact. Test Method: Prepare test specimens according to para 3.10. After conditioning for 24 h at 23 +/- 2 C expose specimens for 500 h to a salt spray fog. Determine abrasion resistance as specified under
19、 para 3.10 and examine test panel for evidence of corrosion. Disregard the area 10 mm from the edges. 3.12 COLD ADHESION AT -40 C No flaking, no (FLTM BV 151-01, load “A“) loss of adhesion Test panel preparation according to para 3.10. 3.13 ADHESION The material at all ranges of coating thickness sh
20、all not peel off in a coherent film. Test Method: Coat test panels from para 3.2.1 so that after the: (a) min curing cycle, (b) max curing cycle according to FLTM BV 150-05, Table 2, a dry coating thickness of 3 mm beginning at one edge of the test panel and decreasing to 0.3 mm at the opposite edge
21、. ENGINEERING MATERIAL SPECIFICATION WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011, Ford Global Technologies, LLC Page 4 of 7 After 24 h at 23 +/- 2 C, make two cuts through the coating along the 300 mm length of the test panel and 30 mm apart. Try to peel off the coating starting at the edge with the
22、lowest film thickness. 3.14 WATER ABSORPTION 1.5% max (FLTM BV 153-07, except bake at 165 +/- 2 C) 3.15 FLOW RATE 15 mm max (FLTM BV 151-03) Use 300 x 300 mm test panels prepared according to para 3.10, except wet film thickness of material under test 1.0 - 1.5 mm. 3.16 RESISTANCE TO DRIPPING The ma
23、terial must not fall off or show evidence of dripping. Test Method: Prepare 300 x 300 mm test panels according to para 3.10, except wet film thickness of material under test 1.0 - 1.5 mm. After conditioning for 5 minutes at 23 +/- 2 C, place specimens in an inverted position in a mechanical convecti
24、on oven and subject to the “Min Curing Cycle“ according to FLTM BV 150-05, Table 2. 3.17 COMPATIBILITY WITH PRODUCTION PAINTS No tackiness of material surface, no cracking or blistering. The paint shall cover the sealer satisfactorily without evidence of discoloration or staining. 3.17.1 Wetability
25、and Staining - Test Method: Specimen preparation according to FLTM BV 153-08, Method A, para 1 to 3 and following 3 variants: a) except template 30 x 2 mm b) except template 30 x 2 mm and without spray primer application c) except material application in 30 mm width and at one edge of specimen 2 mm
26、thick tapering to zero at the other edge; no spray primer application. - Proceed at outlined under para 4 to 7 of FLTM BV 153-08, Method A. - After 24 h at 23 +/- 2 C mask 1/2 of the sealer beads types a) to c) and expose each assembly for 240 h. a) At 23 +/- 2 C, b) At 40 +/- 1 C, c) In the Fluores
27、cent Sunlamp Cabinet (FLTM BU 152-02). ENGINEERING MATERIAL SPECIFICATION WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011, Ford Global Technologies, LLC Page 5 of 7 Examine the exposed and unexposed portions of the sealer steps of 24 h. 3.17.2 Resistance to Weathering No discoloration (SAE J 1976) Test M
28、ethod: Expose test specimens in the Miami/Florida area for 6 months and 1 year at 5 degrees facing south. Prior to examination clean specimens using soap and water. 3.17.3 Determination of Yellowing None (FLTM BV 153-12) 3.18 HARDNESS DUROMETER “A“ 40 - 80 (ISO 868, 3 s dwell) Test Method: - Apply a
29、 ribbon of test material in dimensions of 250 x 30 x 5 mm to a test panel prepared per para 3.2.1. - Condition for 10 minutes at 23 +/- 2 C - Expose in a mechanical convection oven at a temperature of 165 +/- 2 C for 30 minutes. - Conditioning at 23 +/- 2 C for 4 h. - Measure Shore Hardness 3.19 SHE
30、AR STRENGTH (FLTM BV 154-03, Method B) Prepare specimens according to section II; coating thickness x = 3 mm. Heat cure according to FLTM BV 150-05, Table 2, min and max curing cycle; use separate specimens for each curing cycle. 3.19.1 At 23 +/- 2 C 500 kPa min 3.19.2 At 90 +/- 2 C 200 kPa min 3.19
31、.3 At - 40 +/- 2 C 500 kPa min 3.20 PEEL STRENGTH (FLTM BV 154-03, Method C) Prepare specimens according to section II; coating thickness x = 3 mm. Heat cure according to FLTM BV 150-05, Table 2, min and max curing cycle; use separate specimens for each curing cycle. ENGINEERING MATERIAL SPECIFICATI
32、ON WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011, Ford Global Technologies, LLC Page 6 of 7 3.21.1 At 23 +/- 2 C 5 N/mm min 3.21.2 At 90 +/- 2 C 2 N/mm 3.21.3 At - 40 +/- 2 C 5 N/mm 3.21 BRIDGING (FLTM BV 153-05) The material shall bridge a gap of x = 4 mm. The sag through length shall not exceed 5 mm.
33、 3.22 ABRASIVES The material shall contain no abrasive agents. Test Method: Dilute a one gram sample of material with one gram of special white spirit (Boiling Range 60/140) and mix thoroughly. Rub a portion of the diluted material 5 times between two pieces of flat, clean plate glass. The appearanc
34、e of scratches on the glass plate will be considered failure. 3.23 SPRAYABILITY The material shall be a smooth homogeneous mixture, free from foreign material and suitable for use in airless spray equipment. It shall spray evenly and rapidly with no tip clogging or fluctuations in the spray pattern
35、and with a min spray-back and fogging. 3.24 QUALITY The material shall be of uniform quality, free from foreign material and properties detrimental to normal production use. 3.25 STORAGE STABILITY WSK-M4G334-A2: 6 months min (From date of receipt at WSK-M4G334-A3: 3 months min Ford Motor Company) No
36、 hard lumps or extreme separation of solvent. Increase of viscosity shall not influence coating process. A2: When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 5 C and 32 C. A3: When stored in sealed unopened containers out of direct sunlight at ambient
37、temperature of 40 C. 3.26 ODOR Rating 3 max (FLTM BO 131-03, cured material per min cycle as in FLTM BV 150-05, for the individual region, for interior application only) ENGINEERING MATERIAL SPECIFICATION WSS-M4G334-A2 WSS-M4G334-A3 Copyright 2011, Ford Global Technologies, LLC Page 7 of 7 4. GENERA
38、L INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 COMPATIBILITY Any other underbody coating, applied to the production material WSK-M4G334-A2/A3 as an additional coating either for the purpose of repair or for other reasons, must be checked for compatibility with WSK-M4G334-A2/A3 production material. 5. SUMMARY OF REVISIONS 2011 07 13 Added Odor Requirement. Editorial changes for clarification.
