1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2009 10 15 N-STATUS Replaced by global strategy B. Witkowski, NA 1991 04 02 EP00E01089483000 Released W. Scholz Conc. J. Shult WP 3948-a Page 1 of 6 SEALER, UNDERBODY COATING, PRIMER OVEN CURING WSK-M4G334-A
2、 NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this specification is a solvent free, heat curing, polyvinylchloride or other plastics based material with high abrasion and good corrosion resistance. 2. APPLICATION: This material was originally released for non-visible areas of unde
3、rbody and wheel arch. The material is applied to electrocoated surface wet in wet with epoxy 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 test panel 30 minutes after oven curing
4、. 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate statistical tools must be used to analyze process/product data so that variation i
5、n the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL 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
6、constitute the reference standard and shall be kept on file at the designated material 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 here
7、in 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A WP 3948-b Page 2 of 6 3.4 COLOR As s
8、pecified on Engineering Drawing 3.5 SOLIDS, min 96.0 % (FLTM BV 150-10) 3.6 ASH, max 35.0 % (FLTM BV 150-10) 3.7 FLASHPOINT 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
9、 volatile ingredient has a flash point 100 C. 3.8 DENSITY AT 20 C 1.26 +/- 0.05 kg/L (ASTM D 1475) 3.9 VISCOSITY AT 20 C (FLTM BV 103-01, 275 kPa line pressure, nozzle dia 2 mm) 3.9.1 As Received 3 - 20 s 3.9.2 After Aging, max 100 s (336 h at 30 +/- 2 C) Note: Final approval of a specific viscosity
10、 of material for production shipments shall be made by the affected Manufacturing Division. In all cases, however, the viscosity shall be within the limits specified above and the material shall meet all requirements of this specification 3.10 SURFACE CONDITION The material shall be dry to touch aft
11、er 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 of 90 degrees within 2 seconds around a 50 mm dia mandrel. Test Method: Test panels of 300 x 100 mm (prepared according to FLTM BI 120-01) shall be coated with
12、 the material under test in such a manner (airless) that after the a) minimum curing cycle and b) maximum curing cycle according to FLTM BV 150-05, Table 2, a dry coating thickness of 0.5 - 0.65 mm is obtained. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A WP 3948-b Page 3 of 6 3.11 ABRASION RESIS
13、TANCE (ASTM D 968) There shall be no exposed metal area showing after 300 liter gravel impact. No loss of adhesion on 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 ma
14、nner (airless) that after curing a dry coating thickness of 0.5 - 0.65 mm is obtained. . After 10 minutes at 23 +/- 2 C coat test specimens wet in wet with production epoxy spray primer, at a dry film thickness of 0.010 - 0.015 mm. . After 10 minutes at 23 +/- 2 C cure test specimens separately acco
15、rding to FLTM BV 150-05, Table 2: a) minimum curing cycle b) maximum curing cycle . Condition for 2 h at 23 +/- 2 C and expose in mechanical convection oven maintained at 70 +/- 2 C for 120 hours. Test Method: . After conditioning for 24 h at 23 +/- 2 C, determine the abrasion resistance according t
16、o ASTM D 968, except I.D. of tube 25 mm and at a gravel throughput rate of 30 - 40 liters/h. For each specimen a 5 liters volume of fresh gravel shall be used. . Check for abrasion resistance and loss of adhesion after 300 liters gravel impact. Continue abrasion test until exposure of metal area and
17、 again check for loss of adhesion. Gravel: Type “GABBRO“ grain size 5 - 8 mm Supply Source: ODENWALDER HARTSTEIN INDUSTRIE GMBH Erbacher Str. 62 D - 6101 Rossdorf 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
18、ours. It shall show no expansion, flaking or loss of abrasion resistance. No loss of adhesion on and around the area of stone impact. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A WP 3948-b Page 4 of 6 Test Method: . Prepare test specimens in accordance with paragraph 3.11. . After conditioning fo
19、r 24 hours at 23 +/- 2 C expose specimens for 500 hours to a salt spray fog. . Determine abrasion resistance as specified under paragraph 3.11 and examine test panel for evidence of corrosion. Disregard the area 10 mm from the edges. 3.13 FLOW RATE, max 15 mm (FLTM BV 151-03) Use 300 x 300 mm test p
20、anels prepared according to paragraph 3.11, except wet film thickness of material under test 1.0 - 1.5 mm. 3.14 RESISTANCE TO DRIPPING The material must not fall off or show evidence of dripping. Test Method: . Prepare 300 x 300 mm test panels according to paragraph 3.11, except wet film thickness o
21、f 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 oven and subject to the “Minimum Curing Cycle“ according to FLTM BV 150-05, Table 2. 3.15 COLD ADHESION No flaking, no loss of adhesion (FLTM BV 15
22、1-01, - 40 C, load “A“) Test panel preparation according to paragraph 3.11. 3.16 ADHESION The material at all ranges of coating thickness shall not peel off in a coherent film. Test Method: . Coat 300 x 100 mm test panels, prepared according to FLTM BI 120-01 in such a manner (airless) that after th
23、e a) minimum curing cycle and b) maximum curing cycle according to FLTM BV 150-05, Table 2, a dry coating thickness of 0.3 mm beginning at one edge of the test panel and increasing to 30 mm at the opposite edge. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A WP 3948-b Page 5 of 6 . After 24 h at 23
24、 +/- 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 film thickness. 3.17 WETABILITY No tackiness of material surface, no cracking or blistering. Staining or discoloration permitted. Te
25、st Method: . Prepare test specimens according to paragraph 3.11. . After conditioning for 10 minutes at 23 +/- 2 C continue test specimen preparation according to FLTM BV 153-08, Method A, paragraph 3 to 7. 3.18 ABRASIVES The material shall contain no abrasive agents. Test Method: Dilute a one gram
26、sample of material with one gram special white spirit (150/200) and mix thoroughly. Rub a portion of the diluted material 100 times between two pieces of flat, clean plate glass. The appearance of scratches on the glass plats will be considered failure. 3.19 SPRAYABILITY The material shall be a smoo
27、th 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 and with a minimum spray back and fogging. 3.20 QUALITY The material shall be of uniform quality, free from
28、foreign material and properties detrimental to normal production use. 3.21 STORAGE STABILITY, min 3 months (From date of receipt at Ford Motor Company) When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 5 C and 32 C. 3.22 SUPPLIERS RESPONSIBILITY All mat
29、erials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. ENGINEERING MATERIAL SPECIFICATION WSK-M4G334-A WP 3948-b Page 6 of 6 Prior to making any changes in the properties, composition, construction, color, processin
30、g or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and ob
31、tain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford is applicable to the materials addressed by this document. The restrictions are defi
32、ned in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF MATERIALS: Materials defined by this specification must have prior approval by the responsible Materials Engineering acti
33、vity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specifica
34、tion (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION: The information below is provided for clarification and assis
35、tance in meeting the requirements of this specification. 5.1 COMPATIBILITY Any other underbody coating, applied to the production material WSK-M4G334-A as an additional coating either for the purpose of repair or for other reasons, must be checked for compatibility with WSK-M4G334-A production material.
