1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7532 Test Method for the Resistance to Environmental Stress-Cracking of Plastic Fuel Tank Raw Material Do Not Use on New Program; No Replacement. F(3D% 7$*B%A 88*8 8 )Y98F72P8 !2l9P2e 4G - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 9
2、57%L: 6#$ . Copyright 2011 General Motors Company All Rights Reserved October 2011 Originating Department: GM Korea Engineering Standards Page 1 of 5 Version : 3 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and E
3、nglish language, the Korean language shall take precedence. 1.1 Purpose. This standard aims at specifying the test method for the resistance to detergent under stress-cracking of HDPE, raw material for plastic fuel tank. 1.2 Applicability. This standard applies to HDPE (High Density Poly Ethylene),
4、raw material for plastic fuel tank. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D1248 ASTM D1693 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment and Reagen
5、t 3.1.1 Notching Device (See Figure 1). 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 . ., E:48t F(3D% 9PE7 88*) 17%L# HDPE 8:7 $4F7 8 )Y98 F72P 2l9P7 $4F !2e8x D4Fd 88F 4G -8x 9IF 8$ . 1.2 957 -88 . HDPE (High Density Poly Ethylene) 8:8 7$*B%A 7
6、 $4F7 957F$ . 2 4) E:4 / :0 : C-H +d%P 9I8 6# F 48 07 38%P E:48x 957F$ . 2.1 17 E:4 / . ASTM D1248 ASTM D1693 2.2 GM E:4 / . None 2.3 dA E:4 / . None 3 4G 88 3.1 4G 8/x -C 46 . 3.1.1 9I%P “?* 4F 3L 8# 8? (,* 1=l ). GM KOREA ENGINEERING STANDARDS EDS-T-7532 Copyright 2011 General Motors Company All R
7、ights Reserved October 2011 Page 2 of 5 Version : 3 Figure 1: Notching Device / ,* 1: “? 4F# 8? 3.1.2 Fixture of Test Pieces (See Figure 2). 3.1.2 4G D 9I$4 (,* 2=l ). Figure 2: Fixture of Test Pieces / ,* 2: 4G D 9I$4 3.1.3 Test Tube capable of containing test detergent (See Figure 3). 3.1.3 4G 7 2
8、l9P* =x7 3L 8# 4G 4 (,* 3=l ). Figure 3: Test Tube / ,* 3: 4G 4 GM KOREA ENGINEERING STANDARDS EDS-T-7532 Copyright 2011 General Motors Company All Rights Reserved October 2011 Page 3 of 5 Version : 3 3.1.4 Test Detergent. 10 % IGEPAL C0-630 solution. 3.1.5 Oven capable of maintaining (502) E . 3.2
9、Test Piece. 3.2.1 At least 3 test pieces shall be tested for sample approval and at least 1 for incoming inspection. 3.2.2 Detailed dimensions of the test pieces are shown in Table 1. 3.1.4 4G 7 2l9P . 10 % IGEPAL C0-630 76 . 3.1.5 (502) E8 7$* 8T: 4#F 7X/D . 3.2 4G D . 3.2.1 4G D8 3L# 3878 7 3P* ,
10、3L8178 7# 1P) F$ . 3.2.2 4G D8 12lF ?3L# $8 E 17 !A!6$ . Table 1: Test Piece Dimensions / E 1: 4G D ?3L 3.2.3 The standard of the notch applied to the test piece is as follows: y Length of notch: 18.9 19.2 mm. y Depth of notch: 0.3 0.4 mm. 3.2.4 The test pieces shall basically be conditioned at temp
11、erature of (232) E and relative humidity of (505) % for at least 40 hours prior to test. 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, r
12、eports, etc. 4.2 Instructions. 4.2.1 Checking of dimensions of the test piece, such as width, length and thickness, conform to those specified in clause 3.2. 4.2.2 Fasten 10 test pieces meeting the dimensional requirements to fixture of test pieces which is capable of applying a certain stress as sh
13、own in Figure 2. 4.2.3 After putting the fixture with test pieces inside the test tube, fill the tube with 10 % IGEPAL solution. 4.2.4 Place the fixture with test pieces inside an oven capable of maintaining (502) E for 500 hours. 3.2.3 4G D7 4F# “?8 8t $80 M$ . y “?8 l8 : 18.9 19.2 mm. y “?8 8 : 0.
14、3 0.4 mm. 3.2.4 4G D8t 8?958p) 4G 987 (232) E -C (505) %8 1$43$F72P 40 48 81 % 6| 98=*F$ . 4 4G 9) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 OCT 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 )
