SAE J 75-1999 Motor Vehicle Brake Fluid Container Compatibility《机动车制动液容器兼容性》.pdf

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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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro

2、m, 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 InternationalAll rights reserved. No part of this publication may be

3、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)Fax: 724-

4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLEINFORMATIONREPORTJ75REAF.MAY2006Issued 1965-02Reaffirmed 2006-05Superseding J75 NOV1999Motor Vehicle Brake Fluid Container Compatibility1. ScopeMotor vehicle brake fluid must conform to the requirements of SAE J1703

5、 or J1704, not only whenmanufactured, but also after extended storage in any commercial packaging container. The purpose of thisSAE Information Report is to generate an awareness of the major problems involved in the storage of brakefluids and, to some extent, provide means of circumventing them. It

6、 is also the purpose of this document torelate to experience and to test data accumulated and to list certain conclusions which should aid in the properselection of containers for brake fluid.1.1 BackgroundA problem in selecting containers for brake fluids is that, in the past, many containers have

7、notbeen capable of preserving some of the brake fluids in their original state. For instance, SAE J1703 requiresthat no more than 0.05% by volume of sediment may be found in the fluid at the time of manufacture whentested by the water-tolerance test at 60 C (140 F). Some commercially packaged brake

8、fluids known to meetthe SAE standards when manufactured have been found to exceed the 0.15% sediment permitted forpackaged fluid by as much as ten fold, due to contamination from the container.The reaction of certain inhibitors and other components commonly used in brake fluids with tin plate, solde

9、redseams of metal cans, organic-coated steel, and plastic containers may create a storage problem because ofthe formation of precipitates. These precipitates may or may not be soluble in the brake fluid but are oftenprecipitated under conditions of the water-tolerance test and cause the brake fluid

10、to fail this specification.Other properties of the brake fluid such as boiling point, corrosion, and stability may be affected adversely bystorage in certain containers.1.2 RationaleThis document has been reaffirmed to comply with the SAE 5-Year Review policy.2. References2.1 Applicable Publications

11、The following publications form a part of the specification to the extent specifiedherein. Unless otherwise indicated, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:877-606-7323 (inside USA and Canada)

12、 or 724-776-4970 (outside USA), www.sae.org.SAE J1703Motor Vehicle Brake FluidSAE J1704Borate Ester Based Brake FluidSAE J75 Reaffirmed MAY2006-2-3. Experimental Data: Metal CansExtensive tests have shown that storage of many brake fluids in solderedmetal cans, as judged by the quantity of precipita

13、te formed, may be improved by limiting the lead content of thesolder and preferably having the solder seam on the outside of the can. The least reactive solders, andtherefore the best for this use, would be 100% tin. However, there is no assurance that any solder will besuitable with every brake flu

14、id. When metal cans are used, welded seams are preferred.4. Polyethylene ContainersCorrosion tests and wear-tolerance tests have been run on brake fluids stored inhigh-density polyethylene containers for 3 years. There was no increase in precipitate in the water-tolerancetest and the corrosion test

15、was satisfactory.Any moisture pickup during storage will cause a reduction in boiling point. The moisture pickup is minimized ifthe wall thickness of a high-density polyethylene container is at least 0.76 mm (0.03 in). For increasedcontainer strength which is needed for handling and shipping, 3785 m

16、L (1 gal) high-density polyethylenecontainers should have a minimum wall thickness of 1.02 mm (0.04 in).5. RecommendationProper container selection is critical with respect to preserving the fluid in a satisfactorycondition conforming to SAE J1703 and J1704 standards. It is recommended that the foll

17、owing SAE J1703test procedures be used to evaluate containers.a. Boiling Points, 4.1 and 5.1For evaluation of moisture pickups, package sealing efficiency, andpermeability.b. Corrosion, 4.6 and 5.6For evaluation of possible depletion of brake fluid inhibitor systems understorage conditions.c. Water

18、Tolerance, 4.9 and 5.9For evaluation of precipitated, dispersed, or hydrolyzed precipitatesresulting from the chemical activity between the brake fluid and container materials under storageconditions.d. Resistance to Oxidation, 4.11 and 5.11For evaluation of overall stability of motor vehicle brake

19、fluidsunder storage conditions.Valuable storage information can be obtained by subjecting containers of brake fluid to accelerated storagetests at 48.9 to 60.0 C (120.0 to 140.0 F). Tests performed on fluid samples withdrawn after 10 to 30 dayswill permit the selection of the most suitable container. The moisture pickups in high-density polyethylenecontainers stored at 100% relative humidity and 21.1 to 23.9 C (70.0 to 75.0 F) for 3 months is equivalent toabout 1 year of storage under warehouse conditions where humidity is not controlled.PREPARED BY THE SAE BRAKE FLUIDS STANDARDS COMMITTEE