1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name File Control Number Specification NumberDate Release No. Release/Revision85-05-17 B/001678 TP Revised sheets 3, 4, 6 to 884-06-05 SM/EQ5459 TP ReleaseWP 3948-a Page 1 of 6 COATING, UNDERBODY REPAIR, SMT5005GB4000 ESK-M5G39-AWATER DISPERSION1. SCOPEThe
2、 mate rial defined by this specification is a water dispersion type,so lvent free, air and heat drying under body coating based on styrene-butadiene-rubber.2. APPLICATIONThis specification was released originally for material used for the repairof unc oated body skid areas on non-visible areas of th
3、e underbody. Thismater ial is mainly applied to grease free panels but also to adjacentelectrocoated and PVC underbody coated areas.Prior to the release for a particular application and in addition to therequi rements specified herein, full evaluation under actual productionconditions must be ensure
4、d by affected Component Engineering activity.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be
5、 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 spectra an
6、d thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING
7、 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.ENGINEERING MATERIAL SPECIFICATIONES
8、K-M5G39-AWP 3948-b Page 2 of 6 Note:After 90 minutes drying at 23 +/- 2 C after application the materialsh all have reached an adhesion to withstand the waterleak test innormal production operations without wash-off or displacement.Unles s otherwise specified, tests shall be carried out on panelspre
9、pared as follows:a) on degreased test panels,b) on test panels prepared according to FLTM EU-BI 20-1, Cc) on test panels prepared according to FLTM EU-BI 20-1, C, andcoated with following PVC underbody coatings:C1: SKM-5G9501-AC2: SKM-5G9502-AC3: SKM-5G9503-A3.4 COLOUR dark grey to black(after dryin
10、g) oras specified onEng. Drawing3.5 SOLIDS, min 55 %(FLTM BV 150-10)3.6 ASH, max 60 %(FLTM BV 150-10)3.7 DENSITY AT 20 C, max 1.36 kg/L(ASTM D 1475)3.8 VISCOSITY AT 20 C(Rotational Viscosimete r Brookfield RVT/D, spindle no. 4, rotationalfrequency 1/min, 4 minutes measuring time)3.8.1 As Received 90
11、 - 160 Pas3.8.2 After Ageing, max 160 Pas(14 d at 35 +/- 2 C)3.9 SURFACE CONDITIONThe surface shall be dry to touch, free from cracks, bubbles or pinholes and without staining or discolouration.Test Method1. Airless spray coat test panels of 300 x 100 x 0.8 - 0.9 mmprepared according to c lause 3.,
12、note a) - c), with materialunder test to a dry film thickness of 0.4 to 0.5 mmENGINEERING MATERIAL SPECIFICATIONESK-M5G39-AWP 3948-b Page 3 of 6 2. Examine specimens:a) after 90 minutesb) after 24 h conditioning at 23 +/- 2 C, 120 h ageing at70 +/- 2 C and 1 h at 23 +/- 2 C3.10 ABRASION RESISTANCENo
13、 wear through after min 200 L gravel impact. No loss of adhesionon and around the area of stone impact.Test Method1. Pr epare test specimens in accordance with clause 3.6, testmethod, section 1.2. After conditioning for 24 h at 23 +/- 2 C, 120 h ageing at 70+/- 2 C and 1 h at 23 +/- 2 C determine th
14、e abrasionresistance according to ASTM D 968, except I.D. of tube 25 mmand at a gravel throughput rate of 30 - 40 litres/h. Foreach s pecimen a 5 litres volume of fresh gravel shall beused.Gravel: Type “GABBRO“ grain size 5 - 8 mmSupply Source: Hartstein-Vertriebs-Agentur GmbH OdenwaldIndustriestra
15、e 14D-6100 Darmstadt-Eberstadt3.11 COLD ADHESION AT -40 CNo chipping or flaking, no cracking, no loss of adhesionTest Method1. Pr epare test specimens in accordance with clause 3.6, testmethod, section 1.2. After conditioning for 24 h at 23 +/- 2 C, 120 h ageing at 70+/- 2 C and 1 h at 23 +/- 2 C, t
16、est specimens according toFLTM EU-BV 53-4, Method A, clause 4 and 5, 100 mm mandrel.3.12 CORROSION RESISTANCEThe material shall protect the test panel from corrosion for a saltspray exposure period o f 240 h. It shall show no expansion, flakingor loss of abrasion resistance. No loss of adhesion on a
17、nd aroundthe area of stone impact.Test Method1. Pr epare test specimens in accordance with clause 3.6, testmethod, section 1.ENGINEERING MATERIAL SPECIFICATIONESK-M5G39-AWP 3948-b Page 4 of 6 2. After conditioning for 24 h at 23 +/- 2 C, 120 h ageing at 70+/- 2 C and 1 h at 23 +/- 2 C, test specimen
18、s according toFLTM EU-BV 53-4, Method A, clause 4 and 5, 100 mm mandrel.3.12 CORROSION RESISTANCEThe material shall protect the test panel from corrosion for a saltspray exposure period o f 240 h. It shall show no expansion, flakingor loss of abrasion resistance. No loss of adhesion on and aroundthe
19、 area of stone impact.Test Method1. Pr epare test specimens in accordance with clause 3.6, testmethod, section 1.2. After conditioning for 24 h at 23 +/- 2 C, 120 h at 70 +/- 2C and 1 h at 23 +/- 2 C, expose specimens for 24 0 h to a saltspray fog according to ASTM B 117.3. Condition for 24 h at 23
20、+/- 2 C and test accord ing to clause3.7, test method, section 2, except omit ageing.3.13 ENVIRONMENTAL CYCLINGNo blistering, no chipping or flaking, no loss of adhesionTest Method1. Speci men preparation according to clause 3.6, test method,section 1.2. After 24 h at 23 +/- 2 C, 120 h ageing at 70
21、+/- 2 C and 1 hat 23 +/- 2 C, subject test panels five times to thefollowing cycle:4 h at -40 +/- 1 C4 h at 80 +/- 2 C16 h at 38 +/- 2 C and 98 +/- 2 % RH3.14 FLOW RATE, max 2 mm(FLTM EU-BV 51-3, section 1 - 3a, wet film thick ness 0.8 - 1.0 mm, 23+/- 2 C)3.15 ADHESIONThe material shall not be peele
22、d-off in a coherent film.Test Method1. Speci men preparation according to clause 3.6, test method,secti on 1, except a dry coating thickness of 0.5 mm,beginning at one edge o f the test panel and tapering to zerotowards the other end.ENGINEERING MATERIAL SPECIFICATIONESK-M5G39-AWP 3948-b Page 5 of 6
23、 2. After 24 h at 23 +/- 2 C, 120 h at 70 +/- 2 C and 24 h at 23+/- 2 C, make two cuts through the coating along the 300 mmlength of the test pane l and 30 mm apart and try to peel-offcoating, starting at the edge with lowest film thickness.3.16 SPRAYABILITYThe material shall be a smooth homogeneous
24、 mixtu re, free from foreignmaterial and suitable for use in airless spray equipment. It shallspray evenly and rapidl y with no tip clogging of fluctuations in thespray pattern and with a minimum spray back and fogging.3.17 QUALITYThe material shall be a smooth homogeneous mixtu re, free from foreig
25、nmaterials and properties detrimental to normal production use. Themat erial must be capable of regaining its initial physicalchara cteristics and performance after recirculation or agitationprior to use.3.18 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent ina
26、l l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials abili
27、ty to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be subm
28、itted with the request.Substance restrictions imposed by law, regulations or Ford isapplic able to the materials addressed by this document. Therestrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a d ifferent suffix (e.g., A2 or A3) is specifiedon the engineering d
29、ocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design an
30、d Materials Engineering activity. Uponrequest, the supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, t
31、he material will be addedto the Engineering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATIONESK-M5G39-AWP 3948-b Page 6 of 6 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 STORAGE STABILITY(from date of receipt at FMC)Minimum 4 months when s tored in sealed, unopened drums out of directsunlight at ambient temperatures of 5 - 28 C.
