1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2009 10 15 N-STATUS Replaced by global strategy B. Witkowski, NA 1998 03 24 Revised Rev. para 3.9-3.11, 3.26, 5.1; Updated W. Scholz 1995 03 22 EP00E10428888000 Released W. Scholz WP 3948-a Page 1 of 9 SEALER,
2、 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 specifications are solvent release, airless
3、 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 wheel arch. The material is applied to
4、 electrocoated surfaces using airless spray equipment or tube gun wet in wet with current production spray primer. 3. REQUIREMENTS Note: Unless otherwise specified use test panels EC-coated according to FLTM BI 120-01, C. The material must be applied on the EC-coated panel 30 minutes after oven curi
5、ng. 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qualification of materials. A Control Plan for ongoing production verification is required. This plan must be
6、 reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to analyze process/product data and assure consistent processing of the materials. Part producers using this
7、 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 2 of 9 3.2 INFRARED SPECTROPHOTOMETRY AND/OR T
8、HERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated materi
9、al laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50
10、 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. 3.4 COLOR As specified on Engineering Drawing 3.5 SOLIDS, min WSK-M4G334-A2: 96.0 % (FLTM BV 150-10) WSK-M4G334-A3: 94.0 % 3.6 ASH, max 35.0 % (FLTM BV 150-10) 3.7 FLAS
11、HPOINT 100 C (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 100 C. 3.8 DENSITY AT 23 C, max 1.48 kg/L (ASTM D 1475) The weight tolerance f
12、or any one supplier shall be 0.05 kg/L, based on the recorded weight of the original approved sample. 3.9 VISCOSITY AT 23 C (FLTM BV 103-01, 275 kPa line pressure, nozzle diameter 2 mm) 3.9.1 As Received 3 - 20 s 3.9.2 After Aging, max 100 s (WSK-M4G334-A2: 336 h at 30 +/- 2 C) (WSK-M4G334-A3: 336 h
13、 at 40 +/- 2 C) ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 3 of 9 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 viscosity shall be within the limits
14、 specified above and the material shall meet all requirements of this specification. 3.10 SURFACE CONDITION After curing the material shall be dry to touch after cooling to 23 +/- 2 C. It shall be free from bubbles and shall show no evidence of chipping or cracking. Bend the sample through an angle
15、of 90 degrees within 2 s around a 50 mm diameter mandrel. Test Method: Test panels of 300 x 100 mm (prepared according to FLTM BI 120-01) shall be coated with the material under test in such a manner (airless) that after the a) min curing cycle and b) max curing cycle WSK-M4G334-A2: According to FLT
16、M BV 150-05, Table 2, 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 3.11 ABRASION RESISTANCE (ASTM D 968) There shall be no exposed metal area showing after 300 L gravel impact. No loss of adhesion on
17、and around the area of stone impact. Panel Preparation: Test panels of 300 x 100 mm (prepared according to FLTM BI 120-01) 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 co
18、at test specimens wet in wet with current production spray primer, at a dry film thickness of 0.010 - 0.015 mm. After 10 minutes at 23 +/- 2 C cure test specimens separately according to FLTM BV 150-05, Table 2: a) min curing cycle b) max curing cycle ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2
19、 WSK-M4G334-A3 WP 3948-b Page 4 of 9 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 according to ASTM D 968, except I.D. of tube 25 mm and at a grav
20、el throughput rate of 30 - 40 liters/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 adhesion. Gravel: Type “GABBRO“ grain si
21、ze 5 - 8 mm Supply Source: ODENWAELDER HARTSTEIN INDUSTRIE GMBH Lise-Meitner-Str. 35 D 63457 Hanau 3.12 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, flaking or loss of abrasion resist
22、ance. No loss of adhesion on and around the area of stone impact. Test Method: Prepare test specimens in accordance with para 3.11. 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 para 3.11 and examine test pa
23、nel for evidence of corrosion. Disregard the area 10 mm from the edges. 3.13 COLD ADHESION No flaking, no (FLTM BV 151-01, - 40 C, load “A“) loss of adhesion Test panel preparation according to para 3.11. 3.14 ADHESION The material at all ranges of coating thickness shall not peel off in a coherent
24、film. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 5 of 9 Test Method: Coat 300 x 100 mm test panels, prepared according to FLTM BI 120-01 in such a manner (airless) that after the a) min curing cycle and b) max curing cycle according to FLTM BV 150-05, Table 2, a dr
25、y coating thickness of 0.3 mm beginning at one edge of the test panel and increasing to 3 mm at the opposite edge. 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 lowest f
26、ilm thickness. 3.15 WATER ABSORPTION, max 1.5 % (FLTM BV 153-07, except bake at 165 +/- 2 C) 3.16 FLOW RATE, max 15 mm (FLTM BV 151-03) Use 300 x 300 mm test panels prepared according to para 3.11, except wet film thickness of material under test 1.0 - 1.5 mm. 3.17 RESISTANCE TO DRIPPING The materia
27、l must not fall off or show evidence of dripping. Test Method: Prepare 300 x 300 mm test panels according to para 3.11, 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 convection ov
28、en and subject to the “Min Curing Cycle“ according to FLTM BV 150-05, Table 2. 3.18 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. ENGINEERING MATERIAL SP
29、ECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 6 of 9 3.18.1 Wetability 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
30、) except material application in 30 mm width and at one edge of specimen 2 mm 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
31、 assembly for 240 h. a) At 23 +/- 2 C, b) At 40 +/- 1 C, c) In the Fluorescent Sunlamp Cabinet (FLTM BU 152-02). Examine the exposed and unexposed portions of the sealer steps of 24 h. 3.18.2 Resistance to Weathering (SAE J 1976) Test Method: Expose test specimens in the Miami/Florida area for 6 mon
32、ths and 1 year at 5 degrees facing south. Prior to examination clean specimens using soap (SM1B4) and water. 3.18.3 Determination of Yellowing None (FLTM BV 153-12) Heat cure at 175 +/- 2 C for 10 minutes, para 5, 130 +/- 2 C for 10 minutes metal temperature. The warmup time to reach this temperatur
33、e shall not exceed 10 minutes. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 7 of 9 3.19 HARDNESS DUROMETER “A“ 40 - 80 (ISO 868, 3 s dwell) Test Method: Apply a ribbon of test material in dimensions of 250 x 30 x 5 mm to a test panel of 300 x 100 x 0.8 - 0.9 mm. Cond
34、ition for 10 minutes at 23 +/- 2 C and expose in a mechanical convection oven at a temperature of 165 +/- 2 C for 30 minutes for Shore Hardness after conditioning at 23 +/- 2 C for 4 h. 3.20 SHEAR STRENGTH (FLTM BV 154-03, Method B) Prepare specimens according to section II; coating thickness x = 3
35、mm. Heat cure according to FLTM BV 150-05, Table 2, min and max curing cycle; use separate specimens for each curing cycle. 3.20.1 At 23 +/- 2 C, min 500 kPa 3.20.2 At 90 +/- 2 C, min 200 kPa 3.20.3 At - 40 +/- 2 C, min 500 kPa 3.21 PEEL STRENGTH (FLTM BV 154-03, Method C) Prepare specimens accordin
36、g 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. 3.21.1 At 23 +/- 2 C, min 5 N/mm 3.21.2 At 90 +/- 2 C, min 2 N/mm 3.21.3 At - 40 +/- 2 C, min 5 N/mm 3.22 BRIDGING (FLTM BV 153-05) The
37、 material shall bridge a gap of x = 4 mm. The sag through length shall not exceed 5 mm. 3.23 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 th
38、e diluted material 5 times between two pieces of flat, clean plate glass. The appearance of scratches on the glass plate will be considered failure. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 8 of 9 3.24 SPRAYABILITY The material shall be a smooth homogeneous mixtu
39、re, 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 and with a min spray-back and fogging. 3.25 QUALITY The material shall be of uniform quality, free from foreign material and pro
40、perties detrimental to normal production use. 3.26 STORAGE STABILITY, min WSK-M4G334-A2: 6 months (From date of receipt at WSK-M4G334-A3: 3 months Ford Motor Company) No hard lumps or extreme separation of solvent. Increase of viscosity shall not influence coating process. A2: When stored in sealed
41、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 temperature of 40 C. 3.27 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all character
42、istics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the
43、 specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with
44、the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The regulations are defined in Engineering Materials Specification WSS-M99P9999-A1. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A2 WSK-M4G334-A3 WP 3948-b Page 9 of 9 4. APPR
45、OVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. U
46、pon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification (test resul
47、ts, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applications. Upon approval, th
48、e material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 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.
