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1、I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Adhesives i ADHESIVE, INDUCTION CURE, EPOXY, STRUCTURAL - METAL 9985599 1 SCOPE. This specification details the physical proper- ties and performance requirements of a 1 component, heat curing (induction or oven), thennosetting, epox
2、y based, stnic- tural adhesive paste modified to reach sufficient handling strength (metai distortion) in a normal induction cure cycle. The adhesive is commonly used to bond steel body compo- nents such as innerlouter body panels on doors, hoods, deck lids and other components. 1.1 The adhesive sha
3、ll be a non sag material capable of adhering and bonding through ail common oils and drawing compounds approved by CPC Engineering for use on steel components. The material is compatible with piain steel (cold died), zincrometai or hot dipped and ekarocoated gaivanized steeL The adhesive m u s t be
4、homogeneous and frae of lumps or unmixed particles. The uncured material when applied in a hem fiange section must withstand production zinc phosphat- ing, - 0 processing and the subsequent bake temperames of up to W C . The adhesive can also be cured with a min 30 minute akc 1OC with or without a p
5、rior single 4 s induc- tion cum cycle in a normal, w i n coil designed fi run at 3 kHz. Other induction cure coil designs may necessitate longer dwell times for the cure cycle. The adhesive is also capable of being roboticaiiy applied in a hem flange area under n o d fabricating plant conditions. Pr
6、ovisions should be made in the fabrication process to monitor hem fiange temperatures during induction heating to insure that the level of cure nquindis met. 2 REFERENCED STANDARDS. 3.1.6 Stability. When conditioned as stated below, the adhe- sive shall be capable of meting aii the requkments of the
7、 3.1.6.1 Elevated Tempenrture Stability. The adhesive as received be capable of withstanding a temperature of 54C for 72 h without any deleterious effects. 3.1.6.2 Low Tcmpcratruie Stability. The adhesive as received shall be capable of being frozen (OC) indefinitely without any deletehms effcts on
8、the adhesive perfonnance. 3.1.7 Resmire Stability (GM9761P). The adhesive must be capable of withstanding pumping pressures without adversely effezthg its flow characttns tics. The materiai must not cake and or separak after being subjected to 13 790 kPa for 24 h . 3.1.8 Sag Characteristics (GM9749P
9、). The material shall not exhibit any perceptible slump or movement with a 6 mm dia bead applied over a n oiled, piah, steel, zincromeai, gaiva- nized or aluminum panel In addition when a 6 mm dia bead of adhesive is sandwiched between oily pieces of steel 6 mm apart, the material must not run o r f
10、low out during the produc- tion baking operation. 3.2 Material Properties (Cured State). The adhesive for the testing in t h i s section of the specification should be applied in mock up hemmed panels as shown in Figure 1. Adhesive bond line thickness w i l l be 0.127 to 0.254 mm. The steel used in
11、these panels should be of te various types outlined in the gen- eral description section of the standard coated with all the SpeCifiCati0I.C approved rpin design) run for 4 s min with 3 LHZ power. (Unless otherwise noted, the strength and performance quire- ments of the adhesive in this standard are
12、 determined w i t h Oniy an induction cure.) ASTMD1002 should be cured inan induction cure kd with 2 direct GM921P GM9751P GM9505P GM9761P SAE J243 GM951 1P 9984Ooo GM9749P ASTM D638 3 REQUIREMENB. 3.1 Ropcrtics. 3.1.1 Color. To be detexmimi a t t i m e of approval. 3.1.2 Odor. The adhesive must not
13、 have a toxic or noxious odor and shal not have any adverse effects on personnel hau- dling it. There must also be no perceptible odor from the adhesive during or aftcr cure. 3.1.3 Solids Content (ASTM D 1 0 8 4 ) 98% by mass min 3.21 Phosphate Resistance. Coat 3 sets of hem simulated panels outline
14、d in P i p 1 (0.75 mm metai gauge) made from CRS, zincrometai and galvanized with ail the currently used fabrication plant inner/outer drawing compounds and lubri- cants (30 m4m2). Apply beads of adhesive (4 to 6 mm) in the hem flange area of the panels and then induction cure as speci- fiid. Pass t
15、he panels hung vertically through a production cleaning and phosphating system where direct impingement of the spray occurs on the hcmmed areas. Panels a to be hung at heights representative o f top, nter and bottoms of a ved- caliy hung hood. The beads of adhesive in the hems must show excellent ph
16、osphate resistance w i t h no wash out from the panels. 3.1.4 Specific Gravity, room tempe- 1.32 f 0.05 3.15 Vicosity (GM9021P). When tested with a flowmeter at a pressure of 448 H a with 2.64 mm dia orifkc. 3.22 Solvent Resistance and Painabiiiy. Process the above described panels through a product
17、ion ELPO (LTniptlme) paint system. Mm m y show some &or m- face softening, but no cracking or loss of adhesion, bleeding or other deleterious effeds am allowed. The materiai should be compatible with ail electrodeposition primer systems shown on the 9984OOO A and B &awing. Bake temperature to be 1WC
18、 for 30 minutes. hitiak loto25 s 168 h WC: 30 s max 30 days 35C 30 s max AUGUST 1989 PAGE 1 9985599 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:58:49 MDTNo reproduction or networking per
19、mitted without license from IHS -,-,- 1 GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Adheslves i Overlap Shear 4500 N min (or Metai De fomation) ADHESIVE, INDUCTION CURE, EPOXY, STRUCTURAL - METAL 9985599 Hemmed Section 4500 N min (or Metal Deformation) 3.2.2.1 Comsion Resistance
20、. Panels processed per 3.2.1 and 3.2.2should be exposed to the following environments for comsion resistance: 6 weeks GM9505P 2 0 cycles of the Scab Corrosion Enwonmcnt (GM9511P) Overiap Shear 2450 N min 23C (or Metal Defonnatiod 3.2.2.1.1 After exposure is complete, the hems should be peeled back o
21、n the test panel with the enclosed surfaces show- ing no sign of red comsion products. 3.3 PHYSICAL PROPERTES (CURED S“E). All tests in 3.3.3 and 3.3.4 should be p e r f o d on panels of the same construction as outlined in 3.2of this standard. (Unless otherwise stated these pads should only be indu
22、ction cured or to t e s t i n g . ) 3.3.1 Tensile Strength (ASTM D638). 52 f 5 MPa at a crosshead sped of 10 m&mhk after an additional 30 min- nte bake 16oc. 3.3.2 Elongation (ASTM D638). The elongation shali meet the following requirmitnts after a 30 minute bake lWC, 2% min at a crosshead rate of 1
23、0 mm/minute. 3.3.3 Shear Srcngh (ASTM D 1 0 0 2 ) . The panels used for the testing in this section wili be induction cured as previousiy and in the cascs outlined will also be subjected to a simuiated ELPO (vniprm) bake for 3 0 minutes 16oC. The testing will be conducted on 25.4 mm widths of the he
24、mmed panels with a crosshead movexmnt of 10 mm/minute. The adhesive streaigth of the aiiedmatuia sha be -than i t s cohesive strength. (If iap shear testing is indicated, 645 mrd overiap shear strips cured in the above outlined procedure WU be 4 ) 3.3.3.1 24 h Room Temperature Recovery afcr Inductio
25、n curC4s 1WCmaxMetaiTemperatnre: Hemmed Section 1700 N min 23C (or Metai Deformation) 3.3.3.2 24 h Room Temperature Recovery afer Induction Ciiit and Oven Bk 5ONmin 82C 5000Nmin 82C Metal Deformation) I Metai Deformation) 3.3.3.3 24 h Room Temperature Recovery afcr Induction Cpre and Oven Bake follo
26、wing the Listed Environmental Cycles (All panels should be phosphated and WO (Uniprime) primed prior to testing): 500 h neutml sait spray 8 wks 375C/1O% RH 8 wks 70C 12/24 mos monda and Arizona exposue SCAB Corrosion (U, Cycles) per GM9511P 3.3.4 Impact Test (Use Equipmen and Test Alignment per GMW5
27、1P). 323# overlap s k u samples wi be used for testing with induction cure and simulated WO (Uniprime) bal. 3.3.4.1 2 4 h Room Temperame Recovery after Bab 3 Nm min 23C (or M e t a i Deformation) 3.3.4.2 At any of the following Environmental Conditions foilowed by a 2 4 h Room Tempemhue Recovery: a
28、. b. d . e. C. 500 h neutral salt spray 8 wks 375C/100% RH 8 wks 70C 12/24 mos Fiorida and Arizona Exposure SCAB Corrosion (20 Cycles) per GW511P 3.0 N.m min 23C (or Metai Distortion) 3.3.5 Heat SabjUy. There shaii be no evidcn of blister- ing, crackhg, chanhg or emb&hmt of the adhesive when beads o
29、f the material on a steel panel are exposed to a high . 3.3.6 Cold Adhesion. baltemperatUFe0fnK)C. pared as follows: The panels for this test will be pre- 3.3.6.1 Preparc 4 or more typical reinforcement panels as illusht.atedinFigure2.Thebeadapplicationsizei9tobe4to6 mm dia over oily metal. 3.3.6.2
30、Condition the assemblies 23 f 2C for 24 h . 3.3.6.3 Condition 2 assemblies in a convection oven for 30 an overbalre condition. Cool to 23 f 2C. 3.3.6.4 Test assemblies for cold adhesion ushg an SAE J243 minutes 1WC and 2 for 30 minutes 2 w c to simulate ADS-2 Cold slam m. NOTE: Ie aaching m e w s an
31、d thickness shims are moved prior to testing. 3.3.6.5 Cool asdlies to -2YC for 3 h while attached to the Slam nxtart. 3.3.6.6 Drop test panel from a horizontal position 4 times, then aiiow panel to return to room temperature. 3.3.6.7 Repeat t h i s procedue for a totai of 10 cycles. 9985599 PAGE 2 A
32、UGUST 1989 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:58:49 MDTNo reproduction or networking permitted without license from IHS -,-,- I 9006379 0003983 O98 Ei3 Rev A I GENERAL MOTORS EN
33、GINEERING STANDARDS I Materlals and Processes - Adhesive- Date Description DiV 8/89 Editoriaichange ADHESIVE, INDUCTION CURE, EPOXY, STRUCTURAL - METAL 9985599 3 . 4 SHELF LIFE. It is recommended that the product be stored in a controlled environment of 3 5 C for ultimate perfor- mance within 90 day
34、s from receipt. The product is to be shipped 3 5 . 4 2 max. 4 INITIAL SOURCE APPROVAL No shipment shall be made by any supplier u n t i l representative initial production samples have been approved by engineering as meeting the rcquurments of this specification, 4.1 Completed copies of the GM Mater
35、iai Safety Data Sheet and Critical Material Register (available from the engineering department or laboratory) must be submitted with any new submissions or where a composition change has occurred. 5 INSPECTION AND RWECTION. A l l shipments of maerial or parts under contract or purchase order manufa
36、c- tured to this specification shali be equivalent in every respect to the i n i t i a i samples approved by engineexing. “hre shali be no changes in either formulation or manufacturing processes pcrmiaed without prior notification and approval by engineer- ing. Lack of notification by the supplier
37、constitutes grounds for Ejection of any shipment. While samples may be taken from incoming shipments and checked for conforman to t h i s specification, the supplier shall accept the responsibility for incoming shipments xmeting this specification without depen- den upon purchasers inspection. 6 APP
38、ROVED SOURCES. Engineering qualification of an approved source is required for this spccication. O n l y sources l i s t e d in the GM Coprate Materials File under this specification number have been qualicd by the control divi- sion as meeting the requirements of this specification. Sources m avail
39、able through t h e on-line MATSPC System. 7 GENERAL INFORMATION. This specification was originated in Apni 1986. The l a t e s t revisions include: AUGUST 1989 PAGE 3 9985599 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, I
40、HS Not for Resale, 06/23/2008 23:58:49 MDTNo reproduction or networking permitted without license from IHS -,-,- 9006379 OOOl1984 T24 I l 228 P I - I GENERAL MOTORS ENGINEERING STANDARDS I Materlals and Processes - Adhesives I ADHESIVE, INDUCTION CURE, EPOXY, STRUCTURAL - METAL 9985599 f 12.7 1 - 19
41、 305 0.78 STOCK THICKNESS Au. MYENSIONS IN mm FIGURE 1 - INDUCTION CURE LABORATORY TEST PANEL PAGE 4 AUGUST 1989 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:58:49 MDTNo reproduction or n
42、etworking permitted without license from IHS -,-,- t 9006379 0001985 960 I I GENERAL MOTORS ENGINEERING STANDARDS Materials and Processes - Adhesives 3 ADHESIVE, INDUCTION CURE, EPOXY, STRUCTURAL - METAL 9985599 BASE PANEL 305 x 305 CRLC STEEL 8 rnm THICKNESS 0.25 SPACER METAL TO MEM. c A U DIMENSIO
43、N IN rnrn EXCEPT AS NOTED FiGURE 2 AUGUST 1989 PAGE 5 9985599 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:58:49 MDTNo reproduction or networking permitted without license from IHS -,-,-