1、WORLDWIDEENGINEERINGSTANDARDSTest Procedure GMW15477Test Piece Preparation for Testing of Adhesives and Sealantsapplied to Body-in-White Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 1 of 61 ScopeNote: Nothing in this standard supercedes applicable laws and regulations.Note
2、: In the event of conflict between the English and domestic language, the English language shall takeprecedence.1.1 Purpose. Test piece preparation for testing materials applied to Body-In-White (BIW). This preparationmethod is typically used for testing adhesion, corrosion performance and washout r
3、esistance.1.2 Foreword. Not applicable.1.3 Applicability. Materials include pumpable and preformed:x Adhesivesx Structural Foamsx Sealants2 ReferencesNote: Only the latest approved standards are applicable unless otherwise specified.2.1 External Standards/Specifications.DIN 51632-12.2 GM Standards/S
4、pecifications.None3 Resources3.1 Facilities.3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a validcalibration label.3.1.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuringvariables as specified in this
5、 standard shall be determined correctly with respect to their physical definition.3.1.3 Pretreatment / ELPO of representative plant or lab pretreatment and ELPO system.3.2 Equipment.3.2.1 Circulation oven capable of maintaining a set temperature within 3 C.3.2.2 Cartridge gun (not required for prefo
6、rmed materials).3.2.3 Cartridge nozzle with respective opening diameter.3.2.4 Wipe or roller.3.2.5 Balance with an accuracy of 0.01 g.3.2.6 Ultrasonic bath not required for cleaning according to Method 1 (see paragraph 4.3.1.2.1).3.3 Test Vehicle/Test Piece.3.3.1 Number of Test Samples. As required
7、in the relevant material specification.3.3.2 Sheet Metal. Quality as required in the relevant material specification.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWI
8、DE ENGINEERING STANDARDS GMW15477 Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 2 of 6Approximate size:Sheet A: (250 x 100 x 0.8) mmSheet B: (250 x 30 x 0.8) mm3.3.3 Adhesive/Sealer to be tested. For sizes see Table A1 and Table A2.3.3.4 Isoparaffin. (C16 fraction, basis hy
9、drogen-nated tetraisobutylene) Flash point +105 C.Trade name: “Testbenzin” (white spirit) Type 4 according to DIN 51632-1 or identical quality from othermanufacturer. Not required for cleaning according to cleaning Method 2 (see paragraph 4.3.1.2.2).3.3.5 High-grade white spirit boiling range (+100
10、to +140) C.3.3.6 Corrosion protection oil / lubricant as required in the relevant material specification.3.3.7 Glass balls diameter (0.1 to 0.2) mm.3.3.8 Spacer for sizes, see Table A1 and Table A2.3.4 Test Time. Not applicable.3.5 Test Required Information. Relevant material specification for mater
11、ials to be tested (adhesives,structural foams, sealants), as well as for substrate, corrosion protection oil/lubricant identification and coatingweight, preconditioning, cure schedule, number of test samples, etc.3.6 Personnel/Skills. Not applicable.4 Procedure4.1 Preparation.4.1.1 Curing Schedule.
12、According to material specification.4.1.2 Deviations. According to special data called out by approving engineer.4.2 Conditions.4.2.1 Environmental Conditions. Not applicable.4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Suchrequirements shall
13、be specified on component drawings, test certificates, reports, etc.4.3 Instructions. Report the method used for cleaning the test substrate.4.3.1 Oily Metal Substrates. This test substrate may be required when evaluating materials that are applieddirectly to Body-in-White oily metal.4.3.1.1 Test Su
14、bstrate. The test substrate shall consist of flat, burr-free original body sheet metal panels orstandard purchased metal test panels. Panel size shall be according to Figure A1. The substrate quality,corrosion protection oil/ lubricants to be tested shall be according to the relevant material specif
15、ication, the partdrawing or the responsible engineer. The primary test substrate and the constraining test substrate, if required,shall have the same coating.4.3.1.2 Test Substrate Cleaning.4.3.1.2.1 Method 1: Store test panel in isoparaffine for at least 48 h at (+23 5) C. Then clean test panel wit
16、ha wipe using high-grade white spirit. After drying, the panel has to show a grey clean surface without any flowmarks. Repeat cleaning with a new wipe and high-grade white spirit as necessary.4.3.1.2.2 Method 2: Clean test panel for at least 2 minutes at (+23 5) C in high-grade white spirit using an
17、ultrasonic bath. After drying, the panel has to show a grey clean surface without any flow marks. Repeatcleaning operation with fresh high-grade white spirit as necessary.Note: After cleaning, substrate oiling shall quickly follow to prevent corrosion. During all the test procedures,the test panels
18、shall not be touched by hands, but, if need be, shall be held with forceps.4.3.1.3 Test Substrate Oiling. Shake the corrosion protection oil / lubricant well before removing the requiredoiling quantity. Test panels may be heated briefly in the drying oven to +60 C maximum to facilitate the oilapplic
19、ation. Then apply a few drops of oil onto the test panel and spread the oil volume evenly using a wipe orroller.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE EN
20、GINEERING STANDARDS GMW15477 Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 3 of 6The specified oiling volume shall be checked using a balance (gravimetrically) or oil layer thickness gauge.Target coating weight of corrosion protection oil / lubricant is 3 g/m2 and 1.7 g/m2
21、for drylube unless otherwisespecified in the material specification.4.3.1.4 Test Piece Preparation. Condition the oil coated test substrate horizontally for at least 1 h at(+23 5) C prior to applying the test material. Test material application parameters shall be defined in therelevant material spe
22、cification. See Figure A1 (illustration), Table A1 and Table A2 for panel configurations,material dimensions and bonding gaps. For the partially constrained non-tacky configuration place the spacersclose to the ends of the material sample. This assembly shall be referred to as the test piece. Condit
23、ion thetest piece for at least 1 h at (+23 5) C prior to baking, unless otherwise specified in the materialspecification.4.3.2 Co-processed Electrocoat Substrate. This substrate may be required when evaluating materials thatare applied to the Body-In-White, are processed through pretreatment and ELP
24、O system and expand in theELPO oven to contact a wet or partially cured electrocoated surface.4.3.2.1 Test Piece Preparation. According to paragraph 4.3.1. Process the test piece through arepresentative plant or lab pretreatment and ELPO system.4.3.3 Test Piece Bake. Bake the test piece per the time
25、s at metal temperature according to paragraph 4.1.1.Condition the test piece for 24 h at (+23 5) C after the bake prior to testing, unless otherwise specified in thematerial specification.5 Data5.1 Calculations. Not applicable.5.2 Interpretation of Results. Not applicable.5.3 Test Documentation. Inc
26、lude in the report complete information on the material tested (specification,supplier, lot number, etc.), substrate (specification, supplier, lot number, etc.), corrosion protection oil/lubricant(specification, supplier, lot number, etc.), pretreatment/ELPO (specification, supplier, lot number, etc
27、.),cleaning method, preconditioning, cure, postconditioning, panel configuration, any deviations from theparameters defining in Appendix A, and any other observations.6 SafetyThis standard may involve hazardous materials, operations, and equipment. This standard does not propose toaddress all the sa
28、fety problems associated with its use. It is the responsibility of the user of this standard toestablish appropriate safety and health practices and determine the applicability of regulatory limitations priorto use.7 Notes7.1 Glossary. Not applicable.7.2 Acronyms, Abbreviations, and Symbols.ELPO: El
29、ectrophoretic Priming Operation8 Coding SystemThis standard shall be referenced in other documents, drawings, etc., as follows:Test to GMW15774Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without licen
30、se from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15477 Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 4 of 69 Release and RevisionsThis standard originated in November 2006. It was first approved by Global Adhesives Team in August 2008. Itwas first published in August 2
31、008.Issue Publication Date Description (Organization)1 AUG 2008 Initial publication.2 JUN 2013 5 year refresh updateCopyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWID
32、E ENGINEERING STANDARDS GMW15477 Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 5 of 6Appendix AA1Figure A1: Panel ConfigurationSize of the primary test substrate (A) shall be at least (250 x 100 x 0.8) mm (Length x Width x Thickness).Size of the constraining test substrate
33、(B) shall be at least (250 x 30 x 0.8) mm (Length x Width x Thickness).A2Bead Diameter and Bonding Gap (Note 1) shall be according to Table A1 unless otherwise stated in the relevantmaterial specification.Table A1: Panel Preparation for PUMPABLE Materials which are applied prior to PaintPanelConfigu
34、ration Bead Dimension Unconstrained Fully Constrained Partially ConstrainedTest MaterialDiameter x Lengthin mmDiameterin mmPanel Spacing (Note 2)in mmPanel Spacing (Note 2)in mm1) Adhesivesa) Antiflutter (6 to 8) x 220 6 to 8 3 Not applicableb) Hem FlangeAdhesive (2 to 3) x 220 2 to 3 0.1 to 0.2 Not
35、 applicablec) StructuralAdhesive (3 to 5) x 220 3 to 5 0.1 to 0.2 Not applicable2) Sealersa) Weld ThroughSeam Sealers Nonexpanding(6 to 8) x 220 6 to 8 Compress to half thewidth of the bead. Not applicableb) Weld ThroughSeam Sealers Expanding(6 to 8) x 220 6 to 8 Compress to half thewidth of the bea
36、d. Not applicableNote 1: Any deviations shall be approved by the responsible material engineer and documented in the test report.Note 2: Panel spacing is defined as the distance from the top of the primary test panel to the bottom of the constraining test panel.Copyright General Motors Company Provi
37、ded by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15477 Copyright 2013 General Motors Company All Rights ReservedJune 2013 Page 6 of 6A3Part Dimensions and Bonding Gap (Note1) s
38、hall be according to Table A2 unless otherwise stated in the relevantmaterial specification.Table A2: Panel Preparation for PREFORMED Materials which are applied prior to PaintPanelConfiguration Part Dimension Unconstrained Fully ConstrainedPartiallyConstrainedTest MaterialLength x Widthx Thicknessi
39、n mmLength x Widthx Thicknessin mmPanel Spacing(Note 2)in mmPanel Spacing(Note 2)in mm1) AdhesivesSemi-structuralAdhesives Tapes,tacky,non-weldable,expanding150 x 20 x (0.75 to 1.5) Not applicable spacing same asmaterial thickness Not applicable2) Structural FoamsEpoxy insert 150 x 20 x 2 150 x 20 x
40、 2 Not applicable (Note 3)3) Sealersa) Weldable 150 x 20 x 2 150 x 20 x 2 spacing same asmaterial thickness Not applicableb) Expanding, tacky 150 x 20 x 2 All expansions150 x 20 x 2 100 % expansion:spacing same asmaterial thickness 100 %expansion (Note 3)c) Expanding,non-tacky 150 x 20 x 2 Not appli
41、cable Not applicableall expansion(Note 3)Note 1: Any deviations shall be approved by the responsible material engineer and documented in the test report.Note 2: Panel spacing is defined as the distance from the top of the primary test panel to the bottom of the constraining test panel.Note 3: Panel spacing according to the relevant material specification.Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
