1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1992 05 01 EP00E01076167000 Released W.Scholz Conc. J.SchultWP 3948-a Page 1 of 5 UNDERBODY COATING, SOLVENT BASED, AIR DRYING WSK-M5G55-A1. SCOPEThe ma terial defined by this specification is a solvent based, ai
2、r dryingrub ber and synthetic resin based material with high abrasion and goodcorrosion resistance.2. APPLICATIONThis m aterial was originally released for non-visible areas of theunderb ody in service repair applications e.g. wheel arch and/or asspecified on the Engineering drawing. Compatibility w
3、ith adjacent materialsis required (see para 3.15).3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is required for material/source approval. Appropriatestatist ical tools m
4、ust be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spec
5、tra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDIT
6、IONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 COLOR Black3.5 SOLIDS, min
7、 Material: 55.0 %(FLTM BV 150-10) Aerosol: 36.0 %ENGINEERING MATERIAL SPECIFICATIONWSK-M5G55-AWP 3948-b Page 2 of 5 3.6 ASH, max Material 26.0 %(FLTM BV 150-10)3.7 DENSITY AT 23 C, range Material: 1.0 to 1.3 kg/L(ASTM D 1475) Aerosol: 0.8 to 1.0 kg/L3.8 VISCOSITY AT 23 C(PHYSICA RHEOLAB MC 10 with c
8、ylinder measuring device, measuring system MS DIN 114, evaluation according to BINGHAM)3.8.1 As Received, range 0.8 to 1.2 Pa.s3.8.2 After Aging, range 0.9 to 1.3 Pa.s(336 h at 50 +/- 2 C)3.9 DRYING RATEThe material shall be dry to touch after 16 h at 23 +/- 2 C. Thereshall be no transfer of materia
9、l when lightly to uched with the tip offinger.Test Method:1) Apply material under test to steel panels 300 x 100 mm (preparedaccording to FLTM BI 120-01) at a wet coating thickness of 0.8 to1.0 mm (layer).2) Condit ion for 16 h at 23 +/- 2 C and examine as described above.3.10 ABRASION RESISTANCE(AS
10、TM D 968)There sha ll be no exposed metal area showing after 100 L gravelimpact . No loss of adhesion on and around the area of stone impact.Test Method:1) Test panels of 300 x 100 mm (prepared according to FLTM BI 120-01)sha ll be coated with the material under test in such a manner(layer) that aft
11、er curing a dry coating thickness of 1.0 mm isobtained.2) Condition for 16 h at 23 +/- C and expose in a mechanicalconvection oven maintained at 70 +/- 2 C for 120 h.3) After conditioning for 24 h at 23 +/- 2 C, determine the abrasionresistance according to ASTM D 968, except I.D. of tube 25 mm anda
12、t a g ravel throughput rate of 30 - 40 L/h. For each specimen a5 L volume of fresh gravel shall be used.ENGINEERING MATERIAL SPECIFICATIONWSK-M5G55-AWP 3948-b Page 3 of 5 4) Chec k for abrasion resistance and loss of adhesion after 100 Lgravel i mpact. Continue abrasion test until exposure of metala
13、rea and again check for loss of adhesion.Gravel: Type “GABBRO“ grain size 5 - 8 mmSupply Source: ODENWALDER HARTSTEININDUSTRIE GMBHErbacher Str. 62D - 6101 Rossdorf3.11 CORROSION RESISTANCE(ASTM B 117)The mate rial shall protect the test panel from corrosion for a saltspray exposure period of 500 ho
14、urs. It shall show no cra cking, flakingor loss of abrasion resistance.Test Method:1) Prepare test specimens in accordance with 3.10, para 1 and 2.2) After conditioning for 24 hours at 23 +/- 2 C expose spe cimens for500 hours to a salt spray fog according to ASTM B 117.3) Determine abrasion resista
15、nce a s specified under 3.10, para 3 and4, and examine test panel for evidence of corrosion. Dis regard thearea 10 mm from the edges.3.13 FLOW RATE, max No flow(FLTM BV 151-03)Use 30 0 x 300 mm test panels prepared according to 3.10, para 1 and2, exc ept apply wet film thickness of material under te
16、st 0.8 to 1.0mm (layer).3.13 RESISTANCE TO DRIPPINGThe material must not fall off or show evidence of dripping.Test Method:1) Prepare 300 x 300 mm test panel s according to 3.10, para 1 and 2,except wet film thickness of material under test 0.8 to 1.0 mm(layer).2) Inv ert panel immediately and suspe
17、nd in horizontal position for16 h at 23 +/- 2 C.3.14 COLD ADHESION No flaking, noloss o f adhesionFLTM BV 151-01, - 40 C, load “A “, test panel preparation according to3.10, para 1 and 2.ENGINEERING MATERIAL SPECIFICATIONWSK-M5G55-AWP 3948-b Page 4 of 5 3.15 COMPATIBILITY WITH SK-M5G9501-A/2-A, WSK-
18、M4G334-ATest Method:1) For testing, prepare 300 x 100 mm and 300 x 300 mm test panels inaccord ance with test methods as described below; spray thesepanels with the affected underbody coating in a thickness of 0.8to 1.0 mm (dry) and cure as described below.a) SKM5G9501-AFLTM BI 103-02, B2, except wi
19、thout top coat.Curing: FLTM BV 150-05, Table 3, min curing cycleb) SKM5G9502-AFLTM BI 120-01Curing I: FLTM BV 150-05, Table 3, min curing cycleCuring II: FLTM BV 150-05, Table 2, max curing cyclec) WSK-M4G334-AFLTM BI 120-01Curing I: FLTM BV 150-05, Table 2, min curing CycleCuring II: FLTM BV 150-05
20、, Table 2, max curing cycle2) Cond ition for 24 h at 23 +/- 2 C and cover test assemblies asprepared above with WSK-M5G55-A in such a manner (layer) that adry coating total thickness of 1.3 to 1.5 mm is obtained.3) Co ndition for 24 h at 23 +/- 2 C and expose in a mechanicalconvection oven maintaine
21、d at 70 +/- 2 C for 120 h.4) Condit ion for 24 h at 23 +/- 2 C and examine and test as definedunder para 3.15.1 to 3.15.33.15.1 VISUAL EVALUATION No flaking, cracking, blistering,low tackinessPrepare test panel according to 3.15, para 1 thru 4.3.15.2 ABRASION RESISTANCETher e shall be no exposed met
22、al area showing after 400 Lgra vel impact. No loss of adhesion on and around area ofstone impact.Test according to 3.10, para 3 and 4. Prepare test panelsaccording to 3.15, para 1 thru 4.3.15.3 COLD ADHESION No flaking, noloss o f adhesionFLTM BV 1 51-01, - 40 C, load “A“, prepare test panelsaccordi
23、ng to 3.15, para 1 thru 4.ENGINEERING MATERIAL SPECIFICATIONWSK-M5G55-AWP 3948-b Page 5 of 5 3.16 SPRAYABILITYThe material shall be a smooth homogeneous mixture, free from foreignmate rial and suitable for use in aerosol spray equipment. It shallspray evenly and rapidly with no tip clogging or fluct
24、uations in thespray pattern and with a minimum spray back and fogging.3.17 QUALITYThe ma terial shall be of uniform quality, free from foreign materialand properties detrimental to normal production use.3.18 STORAGE STABILITY, min 6 months(From date of receipt at Ford Motor Company)When stor ed in s
25、ealed unopened containers out of direct sunlight atambient temperatures between 5 and 32 C.3.19 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar acteristics to the material upon which approval was originallygranted.Pri or to making any changes in th
26、e properties, composition,const ruction, color, processing or labelling of the materialorigi nally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxi cology and theaff ected Mate
27、rials Engineering activity of the proposed changes andobta in the written approval of the Materials Engineering activity.Test data , test samples and a new code identification are to besubmitted with the request.Substance restrictions imposed by law, regulations or Ford isapp licable to the material
28、s addressed by this document. Therestrictions are defined in Engineering Material SpecificationWSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) isspecified on the engineering document for the application.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior appro
29、val by theresponsible Materials Engineeri ng activity. Suppliers desiring approval oftheir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringact
30、ivity a completed copy of their laboratory test reports, signed by aqualified and authorized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specification (testresults, not nominal values), t he material designation and code number, andtest spec imens for Ford evaluation. Fords engineering approval of amateria l will be based on its performance to this specification and on anassess ment of suitability for intended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.
