1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990-11-02 EP00E01031541000 Released KW conc. J.SchultWP 3948-a Page 1 of 6 PRIMER, STONE CHIP PROTECTION, 35 MICROMETREWSK-M6J167-A1. SCOPEThe mat erial defined by this specification is a solvent b
2、ased stone peckprotective baking primer for exterior automotive applications.2. APPLICATIONThis specification was released originally for material used as stone chipprotec tion primer over baked EC surfaces on engine hoods to improve stonechip r esistance. The material is designed for baking togethe
3、r with primersurfacer.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 be used to analyze proce
4、ss/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 and thermograms establis
5、hed 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 CONDITIONINGAll test values indica
6、ted 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: PU - modified solvent borne synthetic resins.3.4.2
7、 Pigments: Pigments and fillers to obtain the desired colourand resistance properties.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J167-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 Protection Age
8、ncy 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 55 %The n on-volatile content shall be determined at a sprayviscosity of 35 s according to para 3.5.4.3.5.2 Density see Initial Sample
9、 +/- 0,02 g/mL(ASTM D 1475)3.5.3 Viscosity as supplied see Initial Sample +/- 5 s(FLTM BI 111-01)3.5.4 Spray Viscosity as specified by the supplier(FLTM BI 111-01, FC #4)The material can be reduced with Xylene (WSK-M14J239-A).3.5.5 Storage Stability: 90 daysDuri ng a storage of 90 days between 5 and
10、 32 C temperaturethe m aterial as supplied shall not settle up or cakeinsol uble. After the storage the material must pass allspecification requirements.3.6 PREPARATION OF TEST PANELS(FLTM BI 103-02, Method B,b)3.6.1 Substrates as specified on Engineering Drawing.- Standard Steel Panels- Precoated S
11、teel Panels as used in the plantAll subs trates shall be zinc phosphated and conform to therequirements of WSK-M3P1-C.3.6.2 Cathodic Electrocoat:Ford Engineering approved current production electrocoatpr imer, application and film thickness as specified in therelevant material specification.3.6.3 St
12、one Chip Primer:Dry film thickness: 25 - 45 micrometreFlash off time: 1 minuteENGINEERING MATERIAL SPECIFICATIONWSK-M6J167-AWP 3948-b Page 3 of 6 Wet on wet application of Ford Engineering approved currentprodu ction primer surfacer, film thickness as specified inthe relevant material specification.
13、Flash off time: 3 minutesBaking: 5 minutes 165 C metal temperature5 minutes 190 C metal temperature3.6.4 Top Coat:App lication of current approved black, white and two coatsilve r metallic top coats; Film thickness and baking asspecified in the relevant paint material specification.3.6.5 Ageing:Test
14、 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 APPEARANCE (Primer only)Col our, gloss and surface finish shall match master Trim Sampleand/or Master Appearance Sample as approved by Design.3.7.1
15、 Colour light grey3.7.2 Gloss matt to semi gloss3.8 PAINT FILM PROPERTIES3.8.1 LevelingThe surface of the ston e chip primer shall be smooth withoutstructure and only little orange peel when applied in a dryfilm thickness of 45 micrometre.3.8.2 HoldoutNo evidence of dulling, no craters or pinholes a
16、nd no changein i mage clarity when enamel colour coat is applied overunsanded primer.3.9 RESISTANCE PROPERTIES3.9.1 Adhesion No chipping(FLTM BI 106-01, Method B)3.9.2 Stone Chip Resistance, max 2(FLTM BI 157-04)ENGINEERING MATERIAL SPECIFICATIONWSK-M6J167-AWP 3948-b Page 4 of 6 3.9.3 Salt Spray Res
17、istance, 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, min 480 h(FLTM BI 104-01)One hour after test end investigation of adhesion 3.9.1.No blistering
18、, 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.3.10 FLORIDA WEATHERING 12 months(FLTM B
19、I 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, cracking, crazing, chalking, yellowing, lossof
20、 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 Condensing humidity test, 24 h No blistering(ASTM D 2247)The Florida Panels shall be tested after evaluati
21、on 3.10.3.10.2 Adhesion No chipping(FLTM BI 106-01, Method B)Adhesion shall be tested 24 h after test 3.10.1.3.11 PRODUCTION PAINT REPAIRAreas repaired with an additional top coat repair coat of the samecolour must meet stone chip requirement 3.9.2.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J167-AWP 39
22、48-b Page 5 of 6 3.12 ADDITIONAL REQUIREMENTSTest Panels and painted parts prepared according to thisspecification shall 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
23、Company Process Specification U-C800.The primer must be compatible with all related materials e.g.,sealers, adhesives, electrocoat primers, primer surfacer and top coatmaterials.3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the
24、 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 ability to meet the specificati
25、onrequir 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 submitted with the request.Sub
26、stance 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 different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPRO
27、VAL 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 of interest from theaffect ed Purchasing, Design and Materials Engineering activity. Up
28、onrequest, 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 testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engi
29、neering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J167-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 DENSITY OF THE DRY FILM see Initial Sample(FLTM BI 154-02) +/- 0,02 kg/L5.2 FLASH POINT see Initial(ASTM D 56) Sample
