1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7724 Resistance to Oxidation of Brake Fluid Do Not Use on New Program; No Replacement. 9P% 68 !1G2e ?U9I - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General Motors Company All Rights Reserved November 201
2、1 Originating Department: GM Korea Engineering Standards Page 1 of 4 Version : 4 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. This sta
3、ndard specifies the test method for measuring the rate of oxidation resistance of brake fluid used in oil pressure brake of automobiles. 1.2 Applicability. This standard applies to the measuring and the reduction of damage of brake damage resulted from the oxidation of non-mineral oil brake fluid an
4、d safety of adequate brake fluid with brake oil. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM E298 KS M2141 SAE J1703 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1
5、Equipment. 3.1.1 Balance. An analyzing balance capable of measuring minimum 50 g and to 0.1 mg shall be used. 3.1.2 Oven. A gravity oven of convection type, capable of keeping the specified temperature within 2 E . 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8p
6、) F$ . 1.1 +95 . ., E:48t 8% =8 8T6 9P%8?7 17%L# 9P% 6 : /)07 38%P E:48x 957F$ . 2.1 17 E:4 / . ASTM E298 KS M2141 SAE J1703 2.2 GM E:4 / . None 2.3 dA E:4 / . None 3 4G 88 3.1 4G 8/x . 3.1.1 =? . 2 50 g : ?U9IF 3L 8 0.1 mg: ?U9I 4#F .2Q =?8x 17F$ . 3.1.2 7X/D . :9I%P 7$* 2 E8!) 8T:F 3L 8# $4*GI :E)
7、Y 7X/D8x 17F$ . GM KOREA ENGINEERING STANDARDS EDS-T-7724 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 2 of 4 Version : 4 3.1.3 Benzoyl Peroxide. Use a analytical reagent grade with a purity of 96%. However, reagents with a grey brown color or those with a purity unde
8、r 90 % shall be discarded. Here, measure the rate of reaction per the method prescribed in ASTM E 298-68 (STD Methods for Assay of Organic Peroxide). 3.1.4 Corrosion Test Pieces. Prepare two sets of metal test pieces of cast iron and aluminum specified in SAE J 1703b. 3.1.5 Tin Foil. Apply four new
9、strips tin foil with about 12 mm2 in area and 0.02 ) 0.06 mm in thickness. Here, the tin foil having a purity of 99.9 % and lead not more than 0.005 % shall be used. 3.1.6 SBR WC Cup. The storage period of SBR WC cup in accordance with SAE J 1703b (Styrene-Butadine Rubber) shall not be longer than 6
10、 months from the date of manufacturing at 30 E , and 36 months at (-15) E . However, in the case of a cup which has been frozen, use it after leaving it for minimum 12 hours at the room temperature on the plane surface. 3.1.7 Screw and Nut. Prepare two made of wrought iron without coating treatment
11、and smeared oil. 4 Procedures 4.1 Conditions. 4.1.1 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.1.2 Pretreatment. 4.1.2.1 Corrosion Test Pieces. 4.1.2.1.
12、1 Weigh the two test pieces sets of test pieces of aluminum and cast iron separately to 0.1 mg. 4.1.2.1 2 Put the tin foils on each test piece, and combine them together. 4.1.2.2 Mixed Fluid for Testing. 4.1.2.2.1 Fill a test tube (20175 mm) with brake fluid of (301) ml. 4.1.2.2.2 In case of a DOT3
13、(department of transportation) and DOT4 brake fluid, mix with benzoyl peroxide of (0.0600.002) g and distilled water of (1.500.05) ml. However, humidified test liquid shall be used, but only benzoyl peroxide in the case of DOT5 brake fluid. 4.1.2.2.3 Shake the test tube loosely plugged with a clean
14、dried cork, and leave it in the oven at (702) E for 2 hours. 3.1.3 01G -98 . 3P$ 96 %8 1= 468x 17F$ . $ , 468 G2F 99.9 % :02Q8 3P$) ! 2e.8 0.005 %8!8 8x 17F$ . 3.1.6 SBR WC ) . SBR 9P% )8x SAE J 1703b(Styrene-Butadine Rubber)7 +4%P $4) 957F+ 30 E) .(44 9P98).Bd 6P8 8! , (-15) E) .(4 9484 36 P8 8!) 1
15、7F7 6 F$ . $ , !%1B72P )8x ! % 4772P 2F 1248 % 6| DDF +7 -? G 17F$ . 3.1.7 3A * & “2F 148 % 6| -?F$ . 4.2.11 Q E+95 cm2 $88) !#86 .48p) 8F D2(8x 9I-4F ?U9IF$ . 5.1.2 % P8 0?* DF%L 0.05 mg/cm2: 9IGF -L7*F$ . 5.2 0 . 5.2.1 :02QDD -I0 =F .8t G$4F: 68t 1B72P$ .(8 9I$) D8! .4 %L62P# 6| %P$ . 5.2.2 3L: GI
16、B 878 8 8t-I:7t 9EF8# .8x 9P7F 4G D7 ?98%L62P# 6| %P$ . 5.2.3 6*-,# 4G D8 ,h -G4 0.05 mg/cm2* ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 4 NOV 2011 Apply new Engineering Standard Template. Limited use with no replacement (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 ($4=E:4 68 ) =* (G)8*4G D4 )
