1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW17013 Test Procedure for Underhood Fluid Exposure Copyright 2013 General Motors Company All Rights Reserved November 2013 Page 1 of 3 1 Scope Note: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict b
2、etween the English and domestic language, the English language shall take precedence. 1.1 Purpose. The purpose of this test procedure is to determine the robustness of Powertrain components to withstand exposure to underhood fluids. This robustness may include characterizations such as color change,
3、 adhesion, lamination, erosion, and appearance. 1.2 Foreword. Not applicable. 1.3 Applicability. This test procedure applies to Powertrain components which may experience in-vehicle field exposure to underhood fluids. This component exposure shall be considered in proper vehicle installed position a
4、nd orientation. Typically, these components may be considered as those located in upper regions of the Powertrain compartment, which may be more easily and directly accessed by spilled fluids. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 Extern
5、al Standards/Specifications. None 2.2 GM Standards/Specifications. GMW14334 GMW16955 3 Resources 3.1 Facilities. Not applicable. 3.1.1 Calibration. The test facilities and equipment shall be in good working order and shall have a valid calibration label. 3.1.2 Alternatives. Alternative test faciliti
6、es and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.2 Equipment. A vessel capable of retaining a liquid for an extended period of time and large enough to also contain sample that
7、 is being tested. 3.3 Test Vehicle/Test Piece. Multiple component samples may be in fixture, in effort to test multiple samples at once through same cycles. 3.4 Test Time. See Method A, Method B, and Method C in 4.3.1 through 4.3.3. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills
8、. Not applicable. 4 Procedure 4.1 Preparation. Test sample(s) must be representative of intended design, subassembly, finishes, and coatings. Test samples must be clean and free of debris prior to initiation of exposure. 4.2 Conditions. The test sample size shall be three (3), unless GM Engineering
9、specifies otherwise. 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 ENGINEERING STANDARDS GMW17013 Copyright 2013 General Motors Company All Rights Reserved Nove
10、mber 2013 Page 2 of 3 4.2.1 Environmental Conditions. Room temperature at 23 C 3 C. 4.2.2 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.2.3 Sample Conditio
11、ning. 4.2.3.1 The test sample(s) are to be conditioned at same ambient test conditions for a minimum of 4 h. 4.2.3.2 Paints, inks, and other similar coatings must cure a minimum of 72 h, prior to the previously defined test sample conditioning. 4.2.3.3 If acrylic adhesives are utilized within any po
12、rtion of a sample subassembly, condition at room temperature for a minimum of 24 h, prior to the previously defined test sample conditioning. 4.3 Instructions. 4.3.1 Method A. Immerse samples in fluid(s) per Appendix A, Table A1 for 24 h, remove and wipe clean. 4.3.2 Method B. Immerse samples in flu
13、id(s) per Appendix A, Table A1 for 1 h, remove and wipe clean. 4.3.3 Method C. Rub sample with ten (10) double rubs using white cheesecloth saturated with the fluid(s) per Appendix A, Table A1. The length of a single rub shall be at least 50 mm. The force on the cloth shall be approximately 5 N and
14、normal to the sample surface. 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. Subjective damage must be identified by preferred method of physical sample review with GM Engineering. Alternatively, photographs of damage may be utilized in place of physical sample evaluation, p
15、ending GM Engineering approval. 5.3 Test Documentation. Test results, observations, and conclusions must be reported in typical laboratory report format. Test results shall be made readily available upon request from GM Engineering. 6 Safety This standard may involve hazardous materials, operations,
16、 and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Gl
17、ossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. OEM Original Equipment Manufacturer 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Test to GMW17013 - Method Y, Fluids Z Y Method to be used. Z Fluids used for sample exposure. 9 Rele
18、ase and Revisions This standard was originated in July 2013. It was first approved by the Plastics Global Subsystem Leadership Team in November 2013. It was first published in November 2013. Issue Publication Date Description (Organization) 1 NOV 2013 Initial publication. Copyright General Motors Co
19、mpany Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW17013 Copyright 2013 General Motors Company All Rights Reserved November 2013 Page 3 of 3 Appendix A Engine Compartm
20、ent Fluids. As defined by GMW16955 If standard is specified for Resistance to Fluids, the fluids in bold type will be tested. Table A1: Fluid Reference Table Fluid Description A1/A2 Brake Fluid B Battery Acid C Commercial Washer Fluid (per GMW14334) D Diesel Fuel E Engine Coolant F Engine Oil G Gaso
21、line Fuel H Ethanol Fuel E85 I Ethanol Fuel E100 L Transmission Fluid/Power Steering Fluid M Diesel Exhaust Fluid Note: Other regional Original Equipment Manufacturer (OEM) initial fill equivalent liquids may be used per the discretion of the approving GM Engineer. Part shall be resistant to the liquids of the region the part is delivered to. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
