1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW14294 Determination of Resistance of Elastomer Profiles to Transit Coating (Protective Wax) Remover Copyright 2012 General Motors Company All Rights Reserved May 2012 Originating Department: North American Engineering Standards Page 1 of 3 1 Scope N
2、ote: Nothing in this standard supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. The object of this standard is to determine the resistance of elastomer profiles to transit coa
3、ting (protective wax) remover. 1.2 Foreword. Not applicable. 1.3 Applicability. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D56 ASTM D1012 ASTM D1078 ASTM D1298 2.2 GM Standards/Specifica
4、tions. B 440 0003 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Test Equipment. 3.2.1.1 Measuring cylinder 0. 1 L and 1 L capacity with graduation scale. 3.2.1.2 Round-bottom flask, 1 L capacity with reflux condenser. 3.2.1.3 Magnetic stirrer with heating plate. 3.2.1.4 Petroleum
5、B 440 0003 or kerosene to meet the following properties: Distillation Range (ASTM D1078). *Initial Boiling Point: 176 C minimum *50%: 225 C minimum *End (Dry) Point: 280 C maximum Flash Point (ASTM D56): 62 C minimum Specific Gravity at 25 C (ASTM D1298): 0.790 to 0.815 Aniline Point (ASTM D1012): 5
6、5 C to 75 C 3.2.1.5 Distilled or deionized water. 3.3 Test Vehicle/Test Piece. 3.3.1 Test Material. A section of 50 mm length of the elastomer profile shall be used as test piece. For initial sample approval and arbitration purposes at least three test pieces, and for routine quality control at leas
7、t one test piece shall be tested. 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 GMW14294 Copyright 2012 General Motors Company All Rights
8、Reserved May 2012 Page 2 of 3 3.4 Test Time. Not applicable. 3.5 Test Required Information. Not applicable. 3.6 Personnel/Skills. Not applicable. 4 Procedure 4.1 Preparation. 4.1.1 Test Sample Preparation. For initial sample approval and arbitration purposes, the minimum time between vulcanization a
9、nd testing of elastomers shall be 72 h. The test pieces shall be maintained at a temperature of +23 C 5 C for at least 8 h before the test is made and not be subjected to any kind of strain during this period. 4.2 Conditions. 4.2.1 Environmental Conditions. 4.2.2 Test Conditions. Deviations from the
10、 requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.3 Instructions. 4.3.1 Test Procedure. Prior to testing, a test liquid of 5% by volume of B 440 0003 or kerosene in deionized water shall be prepa
11、red. 800 mL of this test liquid shall be filled into a 1 L round-bottom flask with reflux condenser and heated to a temperature of +67.5 C 2.5 C under continuous stirring. After this test temperature has been reached, the test piece shall be immersed in the test liquid under continuous stirring for
12、a period of 5 0.5 minutes and subsequently evaluated. For each mixture of test liquid prepared, 10 to 12 test pieces can be tested, whereby the appearance of the test liquid should also be considered. (When the test liquid is polluted by substances from the elastomer profile, it cannot be used for f
13、urther testing). 5 Data 5.1 Calculations. Not applicable. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. 5.3.1 Evaluation and Rating. Examine the elastomer profile for any surface irregularities, such as waviness. 5.4 Report. Report the results of this test procedure in a tes
14、t report. Include observations regarding changes in the elastomer. 6 Safety This standard may involve hazardous materials, operations, 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 es
15、tablish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc.
16、 as follows: Test to GMW14294 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 GMW14294 Copyright 2012 General Motors Company All Rights Res
17、erved May 2012 Page 3 of 3 9 Release and Revisions This standard was originated in September 2005. It was first approved by the Global Elastomers Team in October 2006. It was first published in August 2007. Issue Publication Date Description (Organization) 1 AUG 2007 Initial publication. 2 MAY 2012 5 Year Refresh. (Elastomers Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
