1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7749 The Measuring Method for Mixing Storage Stability in Anti-Freeze Do Not Use on New Program; No Replacement. .% 68 GpF 9486|9I2e ?U9I- Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General Motors Company
2、All Rights Reserved August 2011 Originating Department: GM Korea Engineering Standards Page 1 of 3 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 pre
3、cedence. 1.1 Purpose. This standard specifies methods of measuring the mixed storage stability, or the stability of coolant (antifreeze) for automobiles mixed with water. 1.2 Applicability. This test method applies to measuring the mixed storage stability of coolant mainly canposed of ethylene glyco
4、l. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment and Reagents 3.1.1 Mess Flask. 300 ml. 3.1.2 Oven. To be cap
5、able of heating samples to 80 E . 3.1.3 Hard Water. German hardness 25. y Manufacturing: Manufacture by dissolving 491 ml f calcium chloride is 1 of distilled water. 4 Procedures 4.1 Conditions. 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8p) F$ . 1.1 +95 . .,
6、E:48t 8% =7 !53L (.% 6 )4 ,p0 GpF%P 1B72P8 6|9I2e (GpF 9486|9I2e )8x ?U9IF# -7 $4F7 9IF 8$ . 1.2 957 -88 . ., 4G -8t 7D,) 4(88x :02e.8p) F# !53L8 GpF 9486|9I2e8x ?U9IF# $ 957F$ . 2 4) E:4 / :0 : C-H +d%P 9I8 6# F 48 07 38%P E:48x 957F$ . 2.1 17 E:4 / . None 2.2 GM E:4 / . None 2.3 dA E:4 / . None 3
7、4G 88 3.1 4G 8/x -C 46 3.1.1 +3F(3A . 300 ml8 A d8 . 3.1.2 7X/D . 4* 80 E 818p) 47(F 3L 88x . 3.1.3 3L . $8 $ 25o 8 3L . y 9P9 : 491 ml 8 ?3A)(8& (Calcium Chloride)* 1 8 :*3L7 7FF7 9P9F . 4 4G 9) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 4 AUG 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 )
