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 ther
2、efrom, 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 2016 SAE International All rights reserved. No part of this
3、publication 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: +1 724-776-49
4、70 (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/J1703_201607 SURFACE VEHICLE STANDARD J1703 JUL2016 Issued 1946-12 Revised 2016-
5、07Superseding 1703 AUG2014 Motor Vehicle Brake Fluid RATIONALE 1. EPDM (RM69) and SBR (RM-03a) are currently tested at 70 and 120 C. 120 C is more aggressive, and running the test again at 70 C does not offer any insight to a brake fluids performance; therefore, testing EPDM and SBR at 70 C will be
6、discontinued. 2. With respect to EPDM at 120 C, this test will be suspended until the Committee can decide on a specification adjustment. Testing with the reference fluid (RM66) with EPDM (RM69) yields a volume increase near 0%, and the requirement is currently 0 10%. A minimum requirement that has
7、the same value as an average does not fit a best practice philosophy. 3. Testing with the reference fluid (RM66) with EPDM (RM69) on the Metal Corrosion, Wet Corrosion test can yield negative volume swell (0.5%). The specification of 0 to 10% has EHHQFKDQJHGWRDVWKHFRPPLWWHHLQYHVWLJDWHVa different EP
8、DM formulation. 1. SCOPE This SAE Standard covers motor vehicle brake fluids of the nonpetroleum type, based upon glycols, glycolethers and appropriate inhibitors, for use in the braking system of any motor vehicle such as a passenger car, truck, bus, or trailer. These fluids are not intended for us
9、e under arctic conditions. These fluids are designed for use in braking systems fitted with rubber cups and seals made from styrene-butadiene rubber (SBR), or a terpolymer of ethylene, propylene, and a diene (EPDM). 2. REFERENCES 2.1 Applicable Documents The following publications form a part of thi
10、s specification to the extent specified herein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outs
11、ide USA), www.sae.org. SAE J527 Brazed Double Wall Low-Carbon Steel Tubing SAE J1704 Motor Vehicle Brake Fluid based upon glycols, glycol ethers and the corresponding borates SAE INTERNATIONAL J1703 JUL2016 Page 2 of 24 2.1.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive
12、, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org ASTM D 34-08 Standard Guide for Chemical Analysis of White Pigments ASTM D 91 Test Method for Precipitation Number of Lubricating Oils ASTM D 344 Method of Test for Relative Dry Hiding Power of Paints ASTM D 395 Test
13、Methods for Rubber Property - Compression Set ASTM D 412 Test Methods for Rubber Properties in Tension ASTM D 445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and the Calculation of Dynamic Viscosity) ASTM D 664 Test Method for Neutralization Number of Potentiometric Titrat
14、ion ASTM D2137 Standard Test Methods for Rubber Property-Brittleness Point of Flexible Polymers and Coated Fabrics ASTM D 865 Test Method for Rubber - Deterioration by heating in Air (Test Tube Enclosure) ASTM D 1120 Method of Test for Boiling Point of Engine Coolants ASTM D 1209 Test Method for Col
15、or of Clear Liquids (Platinum-Cobalt Pigments) ASTM D 1364 Test Method for Water in Volatile Solvents (Fischer Reagent Titration Method) ASTM D 1415 Method of Test for International Hardness of Vulcanized Natural Rubber and Synthetic Rubbers ASTM D 1613 Test Method for Acidity in Volatile Solvents a
16、nd Chemical Intermediates Used in Paint, Varnish, Lacquer, and Related Products ASTM D 2240 Method of Test for Indentation Hardness of Rubber and Plastics by Means of a Durometer ASTM D 3182 Recommended Practice for Rubber-Materials, Equipment, and Procedures for Mixing Standard Compounds and Prepar
17、ing Standard Vulcanized Sheets ASTM D 3185 Methods for Rubber-Evaluation of SBR (Styrene-Butadiene Rubber) including Mixtures with Oil ASTM E 1 Specification for ASTM Thermometers ASTM E 145 Specification for Gravity-Convection and Forced-Ventilation Ovens 2.2 Related Publications The following publ
18、ications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org ASTM E 260 Standard Recomme
19、nded Practice for General Gas Chromatography Procedure ASTM E 298 Evaluation of Benzoyl Peroxides SAE INTERNATIONAL J1703 JUL2016 Page 3 of 24 3. MATERIALS The quality of the materials used shall be such that the resulting product will conform to the requirements of this standard and insure uniformi
20、ty of performance. 4. REQUIREMENTS Requirements are given in Table 1, using the test procedures according to Section 5. Table 1 - SAE J1703 test procedures and requirements Test Procedure Section Test Description Unit Requirements 5.1 5.2 Equilibrium Reflux Boiling Point (ERBP) Wet Equilibium Reflux
21、 Boiling Point (WERBP) C C 140 5.3 5.3.1 5.3.2 Viscosity at -40 C at 100 C mm/s mm/s 5.4 pH Value - 7.0 to 11.5 5.5 5.5.1 5.5.2 Fluid Stability High temperature Stability Chemical Stability C C 5 5 5.6 5.6.1 Metal Corrosion Wet Corrosion Metal Strip Characteristics, after test Weight Change of Metal
22、 Strips Maximum Tinned Iron mg/cm 0.2 Steel mg/cm 0.2 Aluminum mg/cm 0.1 Cast Iron mg/cm 0.2 Brass mg/cm 0.4 Copper mg/cm 0.4 Appearance - No Pitting or roughness outside contact area Staining and discoloration - Permitted Liquid characteristics after test Appearance - No gelling or crystalline depo
23、sit pH Value - 7.0 to 11.5 Sediment % Rubber Characteristics, after test SBR (RM-03a) Blisters or sloughing - None Hardness decrease, maximum IRHD 15 Base diameter increase, maximum mm 1.4 EPDM (RM-69) Blisters or sloughing - None Hardness decrease, maximum IRHD 10 Volume increase % SAE INTERNATIONA
24、L J1703 JUL2016 Page 4 of 24 Table 1 - SAE J1703 test procedures and requirements (continued) Test Procedure Section Test Description Unit Requirements 5.6.2 Dry Fluid (as received) Metal Strip Characteristics, after test Weight Change of Metal Strips Maximum Tinned Iron mg/cm2 0.2 Steel mg/cm2 0.2A
25、luminum mg/cm20.1Cast Iron mg/cm2 0.2 Brass mg/cm20.4Copper mg/cm2 0.4Appearance - No pitting or roughness outside contact area Staining and discoloration - Permitted Liquid Characateristics, after test Appearance No gelling or crystalline deposits pH Value - 7.0 to 11.5 Sediment % Rubber Characteri
26、stics, after test SBR (RM-03a) Blister None Sloughing None EPDM (RM-69) Blister None Sloughing None 5.7 Fluidity and Appearance at Low Temperatures 5.7.1 At -40 C Stratification - None Sedimentation/ crystalization - None Bubble Inversion Time s 10 Appearance at Room Temperature - As original 5.7.2
27、At -50 C Stratification - None Sedimentation/ crystalization - None Bubble Inversion Time s Appearance at Room Temperature - As original 5.8 Water Tolerance 5.8.1 At -40 C Stratification - None Sedimentation/ crystalization - None Appearance - Contrast lines on hiding power chart to be discernible w
28、hen viewed through fluid. Bubble Inversion Time s 5.8.2 At 60 C Stratification - None Sedimentation % vol Sediment in Commercial Packaged fluid % vol SAE INTERNATIONAL J1703 JUL2016 Page 5 of 24 Table 1 - SAE J1703 test procedures and requirements (continued) Test Procedure Section Test Description
29、Unit Requirements 5.9 Compatibility 5.9.1 At -40 C Stratification - None Sedimentation/ crystalization - None Appearance - Contrast lines on hiding power chart to be discernible when viewed through fluid. 5.9.2 60 C Stratification - None Sedimentation % vol 5.10 Resistance to Oxidation Metal Appeara
30、nce - No Pitting or roughness outside contact area. No more than a trace of gum. Staining/ Discoloration - Permitted Weight loss of Aluminium mg/cm Weight loss of Cast Iron mg/cm 5.11 Effect on Rubber 5.11.1 Styrene butadiene Rubber (SBR) RM-03a At 120 C Hardness decrease IRHD 0 to 15 Base Diameter
31、increase mm 0.15 to 1.4 Blisters - None Sloughing - None 3 At 120 C TEST SUSPENDED Hardness decrease IRHD 0 to 15 Volume increase % 0 to 10 Blisters - None Sloughing - None SAE INTERNATIONAL J1703 JUL2016 Page 6 of 24 5. TEST PROCEDURES 5.1 Equilibrium Reflux Boiling Point Determine the equilibrium
32、reflux boiling point of the brake fluid by ASTM D 1120 with the following exceptions: 5.1.1 Apparatus 5.1.1.1 Thermometer ASTM E 1, 76 mm immersion, calibrated. Use ASTM 3C or 3F thermometer. For fluids boiling below 300 C (572 F), ASTM 2C or 2F thermometer or other suitable non-mercury containing t
33、emperature measuring device, such as a thermocouple, capable of operating in the same temperature range and having equal or better accuracy may be used. 5.1.1.2 Heat Source Heat source, variable autotransformer-controlled heating mantle designed to fit the flask, or an electric heater with rheostat
34、heat control. 5.1.1.3 Boiling Point Stones RM-75 Silicon Carbide Boiling Stones #8. 5.1.1.4 Preparation of Apparatus Thoroughly clean and dry all glassware before use. Attach the flask to the condenser. Place the mantle under the flask and support it with a suitable ring clamp and laboratory type st
35、and, holding the whole assembly in place by a clamp. NOTE: Place the whole assembly in an area free from drafts or other types of sudden temperature changes. 5.1.2 Procedure When everything is in readiness, turn on the condenser water and apply heat to the flask at such a rate that the fluid is refl
36、uxing in 10 minute 2 minute at a rate in excess of 1 drop/second. Immediately adjust heat input to obtain a specified equilibrium reflux rate of 1 to 2 drop/s over the next 5 minute 2 minute period. Maintain a timed and constant equilibrium reflux rate of 1 to 2 drop/second for an additional 2 minut
37、e; record the average value of four temperature readings taken at 30 s intervals as the equilibrium reflux boiling point. 5.1.3 Repeatability (Single Analyst) The standard deviation of results (each the average of duplicates), obtained by the same analyst on different days, has been estimated to be
38、0.4 C (0.88 F) at 72 degrees of freedom. Two such values should be considered suspect (95% confidence level) if they differ by more than 1.5 C (2.5 F). 5.1.4 Reproducibility (Multilaboratory) The standard deviation of results (each the average of duplicates), obtained by analysts in different labora
39、tories, has been estimated to be 1.8 C (3.02 F) at 17 degrees of freedom. Two such values should be considered suspect (95% confidence level) if they differ by more than 5 C (9 F). SAE INTERNATIONAL J1703 JUL2016 Page 7 of 24 5.2 Wet Equilibrium Reflux Boiling Point 5.2.1 Humidification Procedure Lu
40、bricate the ground-glass joint of a 250 mm (9.89 in) I.D. bowl-form desiccator having matched tubulated glass cover and fitted with a No. 8 rubber stopper. Pour 450 mL 10 mL (15.22 oz 0.34 oz) of distilled water into the desiccator and insert a perforated porcelain plate (Coors No. 60456 or equivale
41、nt). Immediately place one open RM-49 corrosion test jar containing 350 mL 5 mL of the test brake fluid into the desiccator. Place a second open RM-49 corrosion test jar containing 350 mL 5 mL of TEGME (triethylene glycol monomethyl ether, brake fluid grade-Appendix E) (RM-71) into the same desiccat
42、or. The water content of the TEGME control fluid at the start of exposure shall have been adjusted to 0.50% 0.05% by weight (Karl Fischer analysis or equivalent). Replace desiccator cover and insert at once into an ASTM E 145, Type II A, forced ventilation oven set at 50 C 1 C (122 F 1.8 F). Periodi
43、cally, during oven humidification determine water content of the control fluid. When the water content of the control fluid has reached 3.70% 0.05% by weight, remove the desiccator from the oven and seal the test sample. Allow the sealed jar to cool for 60 to 90 minutes at 23 C 5 C (73.4 F 9 F). 5.2
44、.2 Wet Equilibrium Reflux Boiling Point Humidify the brake fluid as described in 5.2.1 and determine the boiling point of the humidified brake fluid as described in 5.1. 5.3 Viscosity Determine the kinematic viscosity of the fluid by ASTM D 445. 5.3.1 Report the viscosity to the nearest mm2/s (centi
45、stokes). Duplicate runs which agree within 1.2% relative to test result are acceptable for averaging (95% confidence level). 5.3.2 Repeatability (Single Analyst) The coefficient of variation of results (each the average of duplicates), obtained by the same analyst on different days has been estimate
46、d to be 0.4% at 47 degrees of freedom. Two such values should be considered suspect (95% confidence level) if they differ by more than 1.2%. 5.3.3 Reproducibility (Multilaboratory) The coefficient of variation of results (each the average of duplicates), obtained by analysts in different laboratorie
47、s, has been estimated to be 1% at 15 degrees of freedom. Two such values should be considered suspect (95% confidence level) if they differ by more than 3%. 5.4 pH Value Mix the fluid with an equal volume of a mixture of 50% ethanol and 50% distilled water neutralized to a pH of 7.0. Determine the p
48、H of the resulting solution electrometrically at 23 C 5 C (73.4 F 9 F), using a pH meter equipped with a calibrated full range (0 to 14) glass electrode and a calomel reference electrode, as specified in ASTM D 664. SAE INTERNATIONAL J1703 JUL2016 Page 8 of 24 5.5 Fluid Stability 5.5.1 High Temperature Stability Heat a new sample of the original test brake fluid to a temperature of 185 C 2 C (36
