1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990 06 28 NBENE10079497000 Released K. R. King E.R. Rezendes M. PerchardWP 3948-a Page 1 of 10 ADHESIVE, EPOXY HYBRID, TWO COMPONENT, ROOM ESB-M2G347-ATEMPERATURE OR INDUCTION CURING, STRUCTURAL1.
2、SCOPEThe material defined by this specification is a pumpable, two-component,room temperature or induction heat curing, epoxy hybrid base, structuraladhesive.2. APPLICATIONThis specification was released originally for material used for structuralbon ding of metal-to-metal body components such as th
3、e inner and outerpanels (hem flange) of deck lid s, doors and hoods, etc. This adhesive canbe use d to bond oily, unclean metal substrates, such as galvanized steel,sheet-zinc rich primer coated steel, and CRLC steel.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements o
4、f Ford 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 analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMET
5、RY 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 established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignat
6、ed material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C
7、 and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 2 of 10 3.4 UNCURED MATERIAL CHARACTERISTICSInitial adhesive streng ths are achieved after 1.5 h room t
8、emperaturecur ing or induction heating at 121 C for 2 s metal temperature.Re commended post bakes for full adhesive cure are 171 C metaltemperature for 10 minutes minimum and 205 C met al temperature for 30minutes maximum.3.4.1 Viscosity(FLTM BV 3-1, 2.64 mm orifice, 550 kPaair pressure, Method A, t
9、est at 25+/- 2 C)3.4.1.1 As received. Base 4 - 6 s. Curative 30 - 50 s3.4.1.2 Aged, 7 days at 40 +/- 2 C. Base 5 s max increase. Curative from initialviscosity3.4.1.3 Aged, 90 days at 27 +/- 2 C. Base 10 s max increase. Curative from initialviscosity3.4.2 Solids, min 100 %(ASTM D 2834, except 3 h at
10、 102 +/-3 C, save sample for next test)3.4.3 Ash, max 30 %(Based on solids weight)Test Method: Place the crucible containing the s olids residuein a cool muffle furnace. Slowly heat to and ma intain at 760+/- 30 C for 1 h, cool in desiccator, and weigh.3.4.4 Weight per Volume +/- 0.02 kg/L(ASTM D 81
11、6) The weight tolerance for any one supplier shall be based onth e recorded weight of his originally approved productionsample. Refer to para 5.7 for additional information.ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 3 of 10 3.4.5 Sag Resistance, max No sag at high or(FLTM BV 18-1,
12、6 mm material low bakethickness, CRLC steel substrate,per para 5.3, cure temperaturesper para 5.4, one panel at eachbake schedule).3.4.6 Expansion No porosity orexpansion. Extrud e a 13 x 200 mm adhesive bead onto a 100 x 300 mm,CRLC steel substrate as identified per para 5.3. Place the test panel i
13、n an air circulating oven and bakeat 205 +/- 2 C for 30 minutes. Conditi on test panel at 23 +/- 2 C for 1 h minimum afterbaking. Cut t he adhesive bead and panel lengthwise through thecenter of the adhesive bead. Examin e the adhesive for any voids, porosity or expansioncaused by entrapped air or i
14、nternal gassing.3.4.7 Storage StabilityTh e material shall be stored in closed containers attemper atures below 27 C away from all sources of heat. Heatgreatly accelerates aging. Under these storage condition s, theshelf life of the material shall be 3 months. However, whenstored at 4 C, the shelf l
15、ife is extended to 6 months. Whenthese materials are stored at temperatures below 23 C, theyshall be conditioned at room temperature prior to applic ation.Ade quate conditioning permits the material to obtain itsmaximum application properties.3.4.8 Material ConsistencyThe material shall be a smooth
16、homogeneous mixture, free fromforeign materials and properties detrimental to normalproduction operations.This adhesive should be deaired during manufacture and bottomfilled into drums to avoid inclusion of air. Additionally,adhesi ve should be filtrated through a No. 30 mesh micronfilter system pri
17、or to drum filling.ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 4 of 10 3.5 INDUCTION CURED MATERIAL PERFORMANCE3.5.1 Lapshear Adhesion Strength, min(FLTM BV 119-01)Substrates per paragraph 5.5, 0.25 mm adhesive bondlinethickness, 13 mm/minute pull rate. Induction heat as spe cifiedb
18、elow with single side coil. Measure metal temperature fromcoil side.GALV. CRLC3.5.1.1 Initial with 121 C 7.7 MPa 5.5 MPaInduction Cure 7.7 MPa(Induction heat 6 samplesat 121 C +/- 2 C for 2 s). 3 samples: Condit ion at room temp. 1 h, thentest.3.5.1.2 Aged with 121 C 10.0 MPa 9.9 MPaInduction Cure(I
19、nduction heat 3 samplesat 121 C +/- 2 C for 2 sfollowed by 1.5 h at roomtemp., expose samples to thefollowing environments)- 29 +/- 2 C for 7 days PLUS38 +/- 2 C and 100 % R.H. for 7 days PLUS40 +/- 2 C for 7 days PLUS23 +/- 2 C for 1 day3.5.1.3 Elevated Temperatures 1.4 MPa 0.8 MPa(Induction heat 9
20、 samplesat 121 C +/- 2 C for 2 sfollowed by 1.5 h at roomtemp., test as follows):. 3 Samples: Condition at room temp. 72 h, testat 149 C metal temp. Oven temp . is159 C. 3 Samples: Condit ion at room temp. 72 h, testat 177 C metal temp. Oven temp . is187 C. 3 Samples: Condition at room temp. for 72
21、h,te st at 205 C metal temp Oventemp. is 215 C.3.5.2 Wash Resistance No wash-off(FLTM BV 16-1, Method A, 11.5 mmmaterial thickness)ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 5 of 10 3.5.3 Electrocoat Compatibility Shall not contaminate(FLTM BV 19-1, use current electrocoat primerpr
22、oduction paints as identified bath or causeby the Body and Chassis electrocoat fileProduct Engineering Office) irregularities3.6 INDUCTION CURED/OVEN CURED MATERIAL PERFORMANCE3.6.1 Lapshear Adhesion Strength, minIndu ction bond 15 test assemblies at 121 +/- 2 C metaltemper ature for 2 s. Use single
23、 side coil and measure metaltemp erature from coil side. Test samples should then beexposed t o the post bake identified in para 5.6.2. Threesamples shall be tested for each condition. 13 mm/minut e pullrate.3.6.1.1 Normal, min(Condi tion for 30 minutes at specified temperatureprior to test)GALV. CR
24、LC. Test at 23 +/- 2 C 10.0 MPa 7.0 MPa. Test at 82 +/- 1 C 3.4 MPa 3.4 MPa. Test at -29 +/- 1 C 10.0 MPa 10.0 MPa3.6.1.2 Aged, min(Condition at 23 +/- 2 C for24 h after exposure, test at23 +/- 2 C). Thermal Cycle 10.0 MPa 10.0 MPa. (10 times)88 +/- 2 C for 4 h PLUS38 +/- 2 C and 100 % R.H. for 4 h
25、PLUS- 29 +/- 2 C for 16 h. 500 H Salt Spray 8.0 MPa 4.5 MPa(Per ASTM B 117)3.6.2 Elongation, min 17 %(ASTM D 638, material cure perpara 5.6.2)3.6.3 Cold Adhesion No cracking or(FLTM BV 1-2, Procedure “E“, adhesi on failure0.51 mm material thickness,substrates per para 5.5 materialcure temp. per para
26、 5.6.2)ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 6 of 10 GALV. CRLC3.6.4 Peel Resistance, min 3.N/mm 3.0 N/mm(ASTM D 1876, material cure perpara 5.6.2, substrates per para 5.5)3.7 ROOM TEMPERATURE CURED MATERIAL PERFORMANCE3.7.1 Lapshear Adhesion Strength, min(Room temp. cure samp
27、les for 1.5 h,13 mm/minute pull rate, substratesper para 5.5)3.7.1.1 Initial 8.0 MPa 4.0 MPa(Cure 6 samples at roomtemp. for 1.5 h). 3 Samples: Test at room temp. immediately. 3 Samples: Condition at room temp. for 24 h,test at room temp.3.7.1.2 Aged 10.0 MPa 10.0 MPa(Cure 3 samples at roomtemp. for
28、 1.5 h, then exposebonded samples to thefollowing environments andtest at 23 +/- 2 C.- 29 +/- 2 C for 7 days PLUS38 +/- 2 C and 100 % R.H. for 7 days PLUS40 +/- 2 C for 7 days PLUS23 +/- 2 C for 1 day3.7.1.3 Elevated Temperatures 1.4 MPa 0.5 MPa(Cure 9 samples at roomtemperature for 1.5 h thentest a
29、s follows):. 3 Samples: Condition at room temp. for 72 h,test a t 149 C metal temp. Oventemp. is 159 C. 3 Samples: Condition at room temp. for 72 h,test a t 177 C metal temp. Oventemp. is 187 C. 3 Samples: Condition at room temp. for 72 h,test a t 205 C metal temp. Oventemp. is 215 C.3.7.2 Wash Resi
30、stance No wash-off(FLTM BV 16-1, Method A,11.5 mm material thickness)ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 7 of 10 3.7.3 Electrocoat Compatibility Shall not contaminate(FLTM BV 19-1, use current electrocoat primerproduction paints as identified bath or causeby the Body and Cha
31、ssis electrocoat fileProduct Engineering Office) irregularities3.8 ROOM TEMPERATURE CURED/OVEN CUREDMATERIAL PERFORMANCE(Room temperature cure test assembliesfor 1.5 h)3.8.1 Lapshear Adhesion Strength, min(Room temperature cure 15 test assemblies. Test samples shouldbe exp osed to the post bake iden
32、tified in para 5.6.2. Threesamples shall be tested for each condition.3.8.1.1 Normal, min(Condi tion for 30 minutes at specified temperatureprior to test)GALV CRLC. Test at 23 +/- 2 C 13.0 MPa 13.0 MPa. Test at 82 +/- 1 C 6.0 MPa 6.0 MPa. Test at -29 +/- 1 C 13.0 MPa 13.0 MPa3.8.1.2 Aged, min. Therm
33、al Cycle 13.0 MPa 13.0 MPa(10 times)88 +/- 1 C for 4 h PLUS38 +/- 1 C and 100 % PLUS R.H. for 4 h PLUS- 29 +/- 1 C for 16 h. 500 h Salt Spray 10.0 MPa 10.0 MPa(Per ASTM B 117)3.8.2 Elongation, min 30 %(ASTM D 638, material cureper para 5.6.2)3.8.3 Cold Adhesion No cracking or(FLTM BV 1-2, Procedure
34、“E“, 0.51 mm adhesi on failurematerial thickness substrates perpara 5.5, cure temp. per para 5.6.2)GALV. CRLC3.8.4 Peel Resistance, min 5.3 N/mm 3.0 N/mm(ASTM D 1876, oven cure perpara 5.6.2, and substratesper para 5.5).ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 8 of 10 3.8.5 Pumpa
35、bilityMate rials being evaluated for initial approval to thisspeci fication must meet FLTM BV 104-01 or equivalentpum pability requirements prior to receiving clearance forproduction shop trial. Pumpability results should be di rectedtowar ds the manufacturing activity for shop trialconsideration. F
36、unctional trial results will be made ava ilableto Design and Materials Engineering prior to material ap provaland release.3.8.5.1 Flowrate, Start-up, Min TBD3.8.5.2 Flowrate increase, 1 h run, max TBD3.8.5.3 Flowrate deviation from initial TBD3.9 FUNCTIONAL APPROVALMaterials being evaluated for a pp
37、roval to this specification shall besubj ected to a production trial. Functional trial results must beapp roved by the affected assembly operation and design engineering.Result s shall be made available to materials engineering prior tomaterial approval and release.3.10 ADDITIONAL REQUIREMENTSSpecif
38、ic requirements for mater ial and/or manufactured parts shall bespecified on the engineering dr awing, engineering parts specificationand/or performance specificatio ns. All critical areas with respect tothese properties shall be designated on the Engineering drawing.3.11 SUPPLIERS RESPONSIBILITYAll
39、 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 the properties, composition,construction, color, processing or labeling of the mater ial originallyapproved under this specif
40、icati on, whether or not such changes affectthe materials ability to meet the specification requirements, theSupplier shall notify Purchasing, Toxicology and the affectedMaterials Engineering activity of the proposed changes and obtain thewritten approval of the Materials Engineering activity. Test
41、data,test sam ples and a new code identification are to be submitted withthe request.Substance restrictions imposed by law, regulations or Ford apply toth e materials addressed by this document. The restrictions aredefined in Engineering Material specification WSS-M99P9999-A1, unlessa different suff
42、ix (e.g, A2 or A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 9 of 10 4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers de
43、siring 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 Engineeringactivi ty its own laboratory report to the specification (test results,
44、 notnominal values), the material designation and code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.5. GENERAL INFORMATIONThe materi al data included herein is for information only and is not arequireme nt f
45、or suppliers. These parameters should be verified with Bodyand Chassis Engineering Materials prior to initiating material testing.5.1 COLORBase WhiteCurative Gray5.2 MIX RATIO(by weight)Base 3.2Curative 1 5.3 BONDING PARAMETERSA 0.25 mm bond line is recommended. Lap shears should u tilize a 13 mmove
46、rlap, ASTM D 1002.5.4 MECHANICAL CONVECTION OVENThe mechanical oven(s) used to postbake the material shall be capableof obt aining 200 C metal temperature on body steel 0.78 mm within 10minutes.5.5 SUBSTRATES5.5.1 Electro Galvanized Steel: Nominal 0.76 mm thickness. S urfaceprec oated with Ford M14B
47、90A-B stamping lubricant at anapplication of approximately 0. 13 mm wet film thickness. GMC90E Electro Galvanized 70/70, clean, unpolished.5.5.2 Hot Dip Galvanized Steel (ESB-M1A250- ): Nominal 0.76 mmthi ckness. Surface precoated with Ford M14B90A-B stampinglubricant at an application of approximat
48、ely 0.13 mm wet filmthickness.5.5.3 CRLC Steel (ESB-M2A250-A): Nominal 0.76 mm thickness.Surface precoated with M-14B90A -B(F) stamping lubricant at anapplication of approximately 0.013 mm wet film thickness.ENGINEERING MATERIAL SPECIFICATIONESB-M2G347-AWP 3948-b Page 10 of 10 5.6 MATERIAL CURE AND
49、POSTBAKE SCHEDULES5.6.1 Standard Cure Cycle: 1.5 h at R. T.5.6.2 Standard Postbake Cycle:10 minutes at 171 C room temp. 30 minutes at 205 C 5.6.3 Minimum Postbake: 171 C metaltemp. for 10minutes.Maximum Postbake: 205 C metaltemp. for 30minutes.5.7 WEIGHT PER VOLUME(ASTM D 816). Base 0.98 - 1.3 kg/L. Curative 1.2 - 1.7 kg/L
