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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2024_201305 SURFACE VEHICLE INFORMATION REPORT J2024 MAY2013 Issued 1993-06 Reaf
5、firmed 2013-05 Superseding J2024 SEP2007 Contaminants for Testing Air Brake Components and Auxiliary Pneumatic DevicesTruck and Bus RATIONALE No changes or updates required at this time. RP to be Reaffirmed “as is“. 1. SCOPE This SAE Information Report establishes a minimum level of uniform recipes
6、for contaminants which may be used when durability testing pneumatic components to obtain additional information on how a device may perform under more true-to-life operating conditions. This type of contamination testing, however, is not meant to replace the type of performance testing described in
7、 SAE J1409 and SAE J1410. Durability testing in the presence of contamination, however, will yield results more reflective of actual in-service field conditions and provide an additional evaluation of pneumatic devices. While the contaminant supply rate and other test criteria of the device being te
8、sted must be set by the device manufacturer or user, the items covered in this document will be: 1.1 Formula for contaminated oil to be used as a lubricant when testing air compressors. 1.2 Formula for a contaminant to be used when testing pneumatic system components other than air compressors. 1.3
9、Other contaminants. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. The latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, T
10、el: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1409 Air Brake Valves Test Procedure SAE J1410 Air Brake ValvePerformance Requirements SAE HS 806 Oil Filter Test Procedure SAE J2024 Reaffirmed MAY2013 Page 2 of 3 2.1.2 Federal Specification Available from U.
11、S. Government, DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-2179, http:/assist.daps.mil or http:/stinet.dtic.mil. Federal Specification F-F-351c 3. FORMULA FOR CONTAMINATED OIL TO BE USED AS A LUBRICANT WHEN TESTING VEHICLE AIR COMPRE
12、SSORS Contaminated oil mixture consists of 11 parts SAE 15W40CD type oil or most current API certified oil (i.e. CJ) to 1 part SOFTC-2A contaminant. Contaminant SOFTC-2A is available from Powder Technology Inc., P.O. Box 1464, Burnsville, MN 55337. SOFTC-2A is specified per SAE Oil Filter Procedure
13、HS 806. SAE HS 806 Specification references federal specification F-F-351c formulation procedure. Ingredients of SOFTC-2A as specified are as follows in Table 1: TABLE 1 - SOFTC-2A INGREDIENTS Ingredients Weight Carbon Black 16% by weight Ferric Oxide 2% by weight PV Resin 4% by weight Straight Mine
14、ral Oil 78% by weight 100% The formulation in Table 1 reflects the use in modern trucks of multiviscosity oil with its additive packages. Also included are rust, abrasive ingredients, and road contaminants which find their way into the engine crankcase by fuel combustion or by air drawn into the eng
15、ine. The combination can accelerate air compressor wear and can cause carbon build-up. 4. FORMULA FOR A UNIFORM CONTAMINANT WHEN DURABILITY TESTING VEHICLE PNEUMATIC SYSTEM COMPONENTS OTHER THAN COMPRESSORS The formula for a uniform contaminant is listed in 4a, b, and c. This formulation was develop
16、ed to reflect the oil, abrasive dirt, and water that often find their way into the various pneumatic components. This combination can cause wear and corrosion and often can swell, shrink, or degrade the nonmetallic materials used in these devices. a. 1 g of Arizona dust, coarse b. 900 mL of SOFTC-2A
17、 contaminant c. 1800 mL water When the effect of multiviscosity oil additives is desired in the testing of vehicle pneumatic system components, the addition of SAE 15W40CD type oil may be considered. This addition to the formulation, however, should be clearly noted in the test results. 5. OTHER CON
18、TAMINANTS In addition, various components of the pneumatic systems being tested may be immersed in other specific chemicals to test for the effect of these contaminants on the materials used to produce the devices. Such chemicals may include, but not be limited to, methyl alcohol (usually water and
19、97% to 100% methyl alcohol); denatured ethyl alcohol (often labeled methyl hydrate for Canadian Federal Government regulations); and reservoir drainings. A recommended recipe for a synthetic formulation reservoir draining is: SAE J2024 Reaffirmed MAY2013 Page 3 of 3 Mix 6 mL of glacial acetic acid a
20、nd 8.2 g of sodium acetate with enough distilled water to make 1 L of solution. Add 1 or more drops of sulfuric acid to adjust pH to 4.3. These contaminants reflect the acidic, contaminated water and deicing fluids that find their way into pneumatic systems. The contaminants previously listed may co
21、rrode or otherwise degrade the integrity or physical properties of the materials used in the pneumatic devices. 6. NOTES 6.1 Marginal Indicia The change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY THE SAE TRUCK AND BUS BRAKE SUPPLY AND CONTROL COMPONENTS SUBCOMMITTEE OF THE SAE TRUCK AND BUS BRAKE COMMITTEE
