1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991 09 02 EP00E01089488000 Released KWWP 3948-a Page 1 of 6 PRIMER, STONE CHIP PROTECTION, 120 MICROMETRE WSK-M6J165-A1. SCOPEThe mat erial defined by this specification is a solvent based stone pe
2、ckprotective baking primer for exterior automotive applications.2. APPLICATIONThis specification was released originally for material used as stone chippr otection primer over baked EC surfaces on certain areas of bodies orassemb lies where high stone chip resistance is required. The material isdesi
3、gned for baking together with primer surfacer.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 must
4、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 spectra
5、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 CONDITIONI
6、NGAll 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 COMPOSITION3.4.1 Resin: Solvent borne synthetic re
7、sins.3.4.2 Pigments: Pigments and fillers to obtain the desired colourand resistance properties.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J165-AWP 3948-b Page 2 of 6 3.4.3 Solvent Emissions See Initial Sample +/- 1 %(ASTM D 3960)This r equirement is as determined by the United StatesEnvironmental Prot
8、ection Agency Reference Method #24 and isonly applicable to materials used in the USA.3.5 MATERIAL PROPERTIES3.5.1 Non-volatile See Initial Sample +/- 2 %;(FLTM BI 102-01) min 70 %3.5.2 Density See Initial Sample +/- 0.05 g/mL(ASTM D 1475)3.5.3 Viscosity As specified by the supplierThe primer is thi
9、xotropic. It shall be supplied inspray-viscosity.3.5.4 Storage Stability 90 daysDuring the storage between 5 and 32 C temperature thematerial as supplied shall not settle up or cake insoluble.Af ter the storage the material must pass all specificationrequirements.3.6 PREPARATION OF TEST PANELS(FLTM
10、BI 103-02, Method B,b)3.6.1 Substrates- Standard steel panels per para 5.2For Initial Approval only:- Precoated steel panels as used in the plantAll subs trates shall be zinc phosphated and conform to therequirements of WSK-M3P1-C.3.6.2 Cathodic ElectrocoatFord Engineering approved current productio
11、n electrocoatpr imer, application and film thickness as specified in therelevant material specification.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J165-AWP 3948-b Page 3 of 6 3.6.3 Stone Chip PrimerDry film thickness 100 - 140 micrometreFlash off time 1 minuteWet on wet application of Ford Engineering
12、approved currentprodu ction primer surfacer, film thickness as specified inthe relevant material specification.Flash off time 3 minutesBaking 5 minutes 165 C metal temperature5 minutes 190 C metal temperature3.6.4 Top CoatApp lication of current approved black, white and two coatsilve r metallic top
13、 coats; film thickness and baking asspecified in the relevant paint material specification.3.6.5 AgeingTest panels prepared under this specification shall be agedfor at least 72 h at 23 +/- 2 C or 16 h at 45 +/- 1 C beforetesting for resistance properties.3.7 APPEARANCECol our, gloss and surface fin
14、ish shall match master Trim Sampleand/or Master Appearance Sample as approved by Design.3.7.1 Colour (Primer only) Light grey to grey3.7.2 Gloss (Primer only) Matt to semi gloss3.8 PAINT FILM PROPERTIES3.8.1 LevelingThe surface of the stone chip primer shall be smooth withacceptab le structure and o
15、range peel when applied in a dryfilm thickness of 140 micrometre.3.8.2 HoldoutNo evide nce of dulling, no craters or pinholes when enamelcolour coat is applied over unsanded primer.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J165-AWP 3948-b Page 4 of 6 3.9 RESISTANCE PROPERTIES3.9.1 Adhesion No chipping
16、(FLTM BI 106-01, Method B)3.9.2 Stone Chip Resistance, max 2(FLTM BI 157-04)3.9.3 Salt Spray Resistance, min 240 h(FLTM BI 103-01)No b listering and no rust on the panel surface and no morethan 3 mm rust creepage and loss of adhesion from a scratchscribed to the bare metal.3.9.4 Water Immersion Test
17、, min 480 h(FLTM BI 104-01)No blistering, loss of gloss or loss of adhesion accepted.3.9.5 Environmental cycling 3 cycles(FLTM BQ 104-07, Procedure I)Evaluation after 3 h conditioning at 21 - 25 C.No c racks, no blistering, no change in appearance or anyother failure caused by the stone chip primer.
18、3.10 FLORIDA WEATHERING 12 months(FLTM BI 160-01)Test pa nels or specimens painted according to para 3.6 of thisspecification and scribed with a “St. Andrews cross“ shall beexpos ed in the area of Miami, Florida, 5 deg facing south for 12months exposure time.Evaluation:No blistering, peeling, cracki
19、ng, crazing, chalking, yellowing, lossof gloss or any other d eterioration caused by the stone chip primer.Test specimen shall be equal to or better than the Master Sampleapproved by Materials Laboratory of Product Engineering.3.10.1 Water Immersion Test, 24 h No blistering(FLTM BI 104-01)ENGINEERIN
20、G MATERIAL SPECIFICATIONWSK-M6J165-AWP 3948-b Page 5 of 6 3.11 PRODUCTION PAINT REPAIRAreas repaired with an additional top coat repair coat of the samecolour must meet stone chip requirement 3.9.2.3.12 ADDITIONAL REQUIREMENTSTest panels and painted parts prepared according to thisspecification shal
21、l meet all requirements of performancespecifications for Vehicle Body WSK-M2P136-A.3.13 QUALITYThe primer must be adaptable for application in accordance withappropriate Ford Motor Company Process Specification U-C800.The primer must be compatible with all related materials e.g.,sealers, adhesives,
22、electrocoat primers, primer surfacer and top coatmaterials.3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in the properties, composition,co nstr
23、uction, color, processing or labelling of the materialorig inally approved under this specification, 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
24、 proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, 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 restricti
25、ons aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J165-AWP 3948-b Page 6 of 6 4. APPROVAL OF MATERIALSMat erials defined by this specific
26、ation must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affecte
27、d Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd
28、code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material A
29、pprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 DENSITY OF THE DRY FILM See Initial Sample(FLTM BI 154-02) +/- 0.52 kg/L5.2 STANDARD STEEL PANELSZinc phosphated test panel
30、s prepared in accordance with FordManufacturing Standard U-MA18004/U-MA18005.Non-ph osphated test panels prepared in accordance with FordManufacturing Standard U-MA18006.5.3 MATERIAL REFERENCEAll related materials used for approval of primer according to thisspecification, e.g. electrocoat primer and paint materials shall benoted in the Initial Sample Report of the primer.
