1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1986 11 03 B/021667TP Revised Sheet 2, clause 3.4.1986 07 01 B/021663TP Revised Sheet 3-5; 10; 11; (3.7;3.8;3.18;3.19;4.)1979 07 13 B/141706TP Last RevisionWP 3948-a Page 1 of 6 UNDERBODY COATING, PRIMER OVEN CUR
2、ING N-Status SK-M5G9503-A1. SCOPEThe material defined by this specification is a solvent free, heat curing,polyvinylchloride or other plastics based material with high abrasion andgood corrosion resistance.2. APPLICATIONThis material was originally released for non-visible areas of underbodyand whee
3、l arch. The material is applied to electrocoated surface wet in wetwith epoxy spray primer.Prior to the release for a particular application and in addition to therequirements specified herein, full evaluation under actual productionconditions must be ensured by affected Component Engineering activi
4、ty.3. REQUIREMENTSNote: U nless otherwise specified use test panels EC-coated according toFLTM EU-BI 20-1, C. The material must be applied on the EC-coated testpanel 30 minutes after oven curing.3.1 COLOUR Black(Not lighter than BS381 No. 633) or as specifiedon Engrg. drawing3.2 SOLIDS, min 96.0 %(F
5、LTM EU-BV 50-10)3.3 ASH, max 35.0 %(FLTM EU-BV 50-10)3.4 FLASH POINT 100 C(ASTM D 93, Method A)Note: In case testing at higher temperatures is not feasible becauseof gelling of test material, the supplier must certify in writingthat each separate volatile ingredient has a flash point 100 C.3.5 DENSI
6、TY AT 20 C 1.26 g/cm3(ASTM D 1475)The density tolerance shall be +/- 0.05 g/cm3.2014 N-STATUS No replacement given2014 11 18 N Status Not to be used for new design A. Wedepohl, NAENGINEERING MATERIAL SPECIFICATIONSK-M5G9503-AWP 3948-b Page 2 of 6 3.6 VISCOSITY AT 20 C(FLTM EU-BV 3-1; 0.275 MN/m2 lin
7、epressure; nozzle diameter 2 mm)3.6.1 As Received 3 - 20 s3.6.2 After Ageing, max 100 s(336 h at 30 +/- 2 C)No te: Final approval of a specific viscosity of material forpr oduction shipments shall be made by affected ManufacturingDivision. In all cases, however, the viscosity shall be within thelimi
8、ts specified above and the material shall meet all requirementsof this specification (Control Sample Laboratory Report).3.7 SURFACE CONDITIONThe material shall be dry to touch after cooling to 23 C +/- 2 C. Itshall be free from bubb les and shall show no evidence of chipping orcracking when bend thr
9、ough an angle of 90 degree s in 2 seconds arounda 50 mm diameter mandrel at 23 C +/- 2 C.Test Method: Test panels of 300 x 100 mm (prepa red according to FLTMEU- BI 20-1) shall be coated with the material under test in such amanner (airless) that after thea) min curing cycleb) max curing cycleaccord
10、ing to FLTM EU-BV 50-5, Table 2 a dry coating thickness of 0.5- 0.65 mm is obtained.3.8 ABRASION RESISTANCEThe re shall be no exposed metal area showing after 300 L gravelimpact. No loss of adh esion on and around the area of stone impact.Test Method:1. Test panels of 300 x 100 mm (prepared accordin
11、g to FLTM EU-BI20-1) shall be coated w ith the material under test in such amanner (airless) that after curing a dry coating thickness of0.5 - 0.65 mm is obtained.2. After 10 minutes at 23 C +/- 2 C coat test specimens wet inwet wit h production epoxy spray primer, at a dry filmthickness of 0.010 -
12、0.015 mm.3. After 10 minutes at 23 C +/- 2 C cure test specimensseparately according to FLTM EU-BV 50-5, Table 2:a) min curing cycleb) max curing cycleENGINEERING MATERIAL SPECIFICATIONSK-M5G9503-AWP 3948-b Page 3 of 6 4. Condition for 2 h at 23 C +/- 2 C and expose in mechanicalconvection oven main
13、tained at 70 C +/- 2 C for 120 hours.5. Afte r conditioning for 24 h at RT determine the abrasionresistance according to ASTM D 968, except I.D. of tube 25 mmand at a gra vel throughput rate of 30 - 40 L/h. For eachspecimen a 5 L volume of fresh gravel shall be used.6. Check for abrasion resi stance
14、 and loss of adhesion after 300L gravel impact. Continue abrasion test until exposure ofmetal area and again check for loss of adhesion.Gravel Type “GABBRO“ grain size 5 - 8 mmSupply Source Odenwlder HartsteinIndustrie GMBHErbacher Str. 62D-6101 Rossdorf3.9 CORROSION RESISTANCEThe material shall pro
15、tect the test panel from corrosion for a saltspray exposure period of 500 hours. It shall show no expansion,flaking or loss of abrasion resistance. No loss of adhesion on andaround the area of stone impact.Test Method:1. Prep are test specimens in accordance with clause 3.8,paragraph 1 - 4.2. After
16、conditioning for 24 hours at 23 C +/- 2 C exposespecimens for 500 hours to a salt spray fog acco rding to ASTMB 117.3. Determine abrasion resistance as specified under clause 3.8and examine test panel for evidence of corrosion. Disregardthe area 10 mm from the edges.3.10 FLOW RATE, max 15 mm(FLTM EU
17、-BV 51-3, 300 x 300 mm test panelsprepared according to clause 3.8. TestMethod, section 1 and 2, except wet filmthickness of material under test 1.0 - 1.5 mm)3.11 RESISTANCE TO DRIPPINGThe material must not fall off or show evidence of dripping.Test Method:1. Prepare 300 x 300 mm test panels accordi
18、ng to clause 3.8.Test M ethod, section 1 and 2, except wet film thickness ofmaterial under test 1.0 - 1.5 mm.ENGINEERING MATERIAL SPECIFICATIONSK-M5G9503-AWP 3948-b Page 4 of 6 2. After conditioning for 5 minutes at 23 C +/- 2 C placespecimens in an inverte d position in a mechanical convectionoven
19、and subject to the “Minimum Curing Cycle“ according toFLTM EU-BV 50-5, Table 2.3.12 COLD ADHESION AT - 40 C No flaking, no(FLTM EU-BV 51-1, test panel preparation loss of adhesionaccording to clause 3.8. Test Method,section 1 to 3, load “A“)3.13 ADHESIONThe material at all ranges of coating thicknes
20、s must not be peeled-off in a coherend film.Test Method:1. Coat 300 x 100 mm test panels, prepared accordin g to FLTM EU-BI 20-1 in such a manner (airless) that after thea) min curing cycleb) max curing cycleaccor ding to FLTM EU-BV 50-5, Table 2, a dry coatingthickness of 0.3 mm beginning at one ed
21、ge of the test paneland tapering to zero at the other edge.2. After 24 h at 23 C +/- 2 C make two cuts through the coatingalong the 300 mm length of the test panel and 30 mm apart andtry to peel-off coating starting at the edge with the lowestfilm thickness.3.14 WETTABILITYNo tackiness of material s
22、urface, no cracking or blistering.Staining or discolouration permitted.Test Method:1. Prepare test specimens according to clause 3.8. Test Method,section 1 and 2.2. Afte r conditioning for 10 minutes at 23 C +/- 2 C continuetes t specimen preparation according to FLTM EU-BV 53-8,Method A, clause 3 t
23、o 7.3.15 ABRASIVESThe material shall contain no abrasive agents.Test Method: Dilute a one gram sample of material with one gramspecial white spirit (1 50/200) and mix thoroughly. Rub a portion ofthe dil uted material 100 times between two pieces of flat, cleanplate glass. The appea rance of scratche
24、s on the glass plate will beconsidered failure.ENGINEERING MATERIAL SPECIFICATIONSK-M5G9503-AWP 3948-b Page 5 of 6 3.16 SPRAYABILITYThe material shall be a smooth homogeneous mixtu re, free from foreignmaterial and suitable for use in airless spray equipment. It shallspray evenly and rapidl y with n
25、o tip clogging or fluctuations in thespray pattern and with a minimum spray back and fogging.3.17 QUALITYThe material shall be o f uniform quality, free from foreign materialand properties detrimental to normal production use.3.18 STATISTICAL PROCESSSupplie rs must conform to the requirements of For
26、d Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyse process/product data sothat variation in the final product is continuously reduced.3.19 SUPPLIERS RESPONSIBILITYAll
27、materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specifi
28、cation, whether or not suchchange s affect the materials ability 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 d
29、ata, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa dif ferent suf
30、fix (e.g. A2 or A3) is specified on the Engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression
31、 of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponreque st, the supplier shall submit to the affect Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and t
32、estspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATIONSK-M5G9503-AWP 3948-b Page 6 of 6 5. GENERAL INFORMATION5.1 STORAGE STABILITY(From date of receipt at FMC)Minimum 3 months when stored betwee
33、n 5 C to 28 C.5.2 IMPORTANT NOTICEAny other underbody coating, applied to the production material SK-M5G9503-A as an additional coating either for the purpose of repairor for other reasons, must be checked for compatibility with SK-M5G9503-A production material analogous to SK-M5G9500-A clause 3.14and SK-M5G9503-A, clause 3.13 requirements (after ageing 72 h at 70C).
