SAE J 2665-2006 Test Procedure to Measure the Fuel Permeability of Materials by the Cup Weight Loss Method《用杯重力损失法测量材料的燃料渗透性的试验方法》.pdf
《SAE J 2665-2006 Test Procedure to Measure the Fuel Permeability of Materials by the Cup Weight Loss Method《用杯重力损失法测量材料的燃料渗透性的试验方法》.pdf》由会员分享,可在线阅读,更多相关《SAE J 2665-2006 Test Procedure to Measure the Fuel Permeability of Materials by the Cup Weight Loss Method《用杯重力损失法测量材料的燃料渗透性的试验方法》.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2006 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org J2665 ISSUED OCT2006 SURFACE VEHICLE RECOMMENDED PRACTICE Issued 2006-10 Test Procedure to Measure the Fuel Permeability of Materials by the Cup Weight Loss Method RATIONALE Not applicable. TABLE OF CONTENTS 1. Scope
5、 1 2. References 2 3. Usefulness and Limitations. 2 4. Safety 3 5. Apparatus 3 6. Test Fuels . 4 7. Sample Preparation 4 8. Procedure 5 9. Plotting the Weight Loss with Time. 6 10. Calculation of Permeation Rate 6 11. Normalized Permeation Rate 7 12. Reporting. 7 1. SCOPE This test standard covers t
6、he procedure for measuring the permeation of fuel or fuel surrogates through test samples of elastomeric, plastic or composite materials, up to about 3 mm thick. The method involves filling a test cup with the test fluid (fuel or fuel surrogate), sealing test sample over the open end of the cup, and
7、 then placing the sealed container into an oven at the desired test temperature and measuring the weight loss over time. Permeation rates are calculated from the rate of weight loss and the exposed area of the test sample. SAE J2665 Issued OCT2006 - 2 - Standard permeation test temperatures are 40 C
8、 and 60 C. Standard test fluids are Fuel C, Fuel CE10 and Fuel CM15. Other fluids, such as Fuel CMTBE15, and other volatile liquids may be tested according to this procedure as desired (SAE J1681). The method is not applicable for measuring permeation of higher boiling materials that will not comple
9、tely evaporate from the exterior surface of the sample at the test temperature. 2. REFERENCES 2.1 Applicable Publication The following publication forms a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE Publications shall apply. 2.1.1
10、SAE Publications Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1681 Gasoline, Alcohol and Diesel Fuel Surrogates for Materials Testing SAE J2659 Test Method to Measure Fluid Permeation
11、 of Polymeric Materials by Speciation 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this document. 2.2.1 ASTM Publications Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, Tel: 610-832-9585,
12、www.astm.org. ASTM D 814-86 Standard Test Method for Rubber Property-Vapor Transmission of Volatile Liquids ASTM E 96-95 Standard Test Methods for Water Vapor Transmission of Materials 3. USEFULNESS AND LIMITATIONS The cup method, when used in accordance with the guidelines presented in the procedur
13、e sections of this method, can be an easy, effective, and relatively inexpensive screening technique for determining the relative permeability of plastics, elastomers and composites: a. The method is useful to establish the permeation rate of a given fluid and material. b. The cup method is a useful
14、 tool for distinguishing between materials that have a significant difference in their resistance to permeation. c. It is most accurate when the test fluid is a pure liquid or a liquid mixture for which changes in composition do not significantly affect the measured permeation rate. The method does
15、have some limitations: a. The permeation rate of individual components of a fuel mixture through the test material cannot be determined; if this is desired, see SAE J2659. b. The method should be used with caution when the components of a fuel mixture have widely different permeation rates: the high
16、 permeating components can be depleted from the mixture before the test is completed. c. For low permeation rates, the weight change is small so that accuracy can be a problem. In addition, the time required to obtain measurable weight changes can be very long. SAE J2665 Issued OCT2006 - 3 - d. For
17、highly permeable materials, the rapid loss of fluid may prevent the attainment of steady state before all the fluid has permeated the test film. The fuel composition of a mixed fuel may also change significantly and possibly provide erroneous results. e. The following is a list of potential sources
18、of error that should be minimized as much as possible: Weighing accuracy Leakage around seals Fuel depletion Temperature control Film thickness variation Pin holes in films Film distortion Change in test fluid composition These sources of error should be reviewed and good experimental techniques emp
19、loyed to minimize the sources of error. Examples of these techniques are described in the method. 4. SAFETY This method is intended for measuring permeation of potentially toxic and/or flammable liquids at elevated temperatures. Each laboratory is responsible for assuring that this method is run in
20、a safe manner according to its internal safety regulations and practices. 5. APPARATUS 5.1 Permeation cups should be Thwing-Albert permeation cups (Vapometer Model 68 available from Thwing-Albert Instrument Company, 10960 Dutton Road, Philadelphia, PA 19154, website: ) (shown in Figures 1 and 2) or
21、equivalent. The permeation cups used shall be leak-tight when assembled with a blank (see 5.5). The Model 68 Thwing-Albert cups, with depth of 50.8 mm, shall be referred to as “TA” cups in this document. NOTE: If T-A cups are used, they should be modified as follows (a) the supplied neoprene gaskets
22、 replaced with FKM gaskets (see Section 5.4) and (b) the six supplied knurled head screws modified or replaced to allow for torque wrench tightening (see Sections 5.7 and 8.9). FIGURE 1 - MODIFIED THWING-ALBERT CUPS: ON THE LEFT, IT IS SHOWN DISASSEMBLED WITH RETAINER RING, SCREWS, MESH, FKM GASKETS
23、 AND CUP; ON THE RIGHT IT IS SHOWN FULLY ASSEMBLED SAE J2665 Issued OCT2006 - 4 - FIGURE 2 - EXPLODED VIEW OF THE MODIFIED THWING-ALBERT PERMEATION CUP, SHOWING THE ASSEMBLY SEQUENCE OF THE COMPONENTS 5.2 Analytical balance should be capable of measuring to 0.0001 gram (e.g., Mettler AT400 or equiva
24、lent). Balances with lower precision may be used, as long as the weight loss between measurements exceeds the precision of the balance by at least 10 times. 5.3 Explosion proof oven or similar constant temperature device capable of holding the filled cups and maintaining their temperature within 1 C
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