1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7756 Test Method for Determining the Resistance to Abrasion of Organic Coatings Do Not Use on New Program; No Replacement. 8TdD98 !*+2e 4G - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General Motors Compan
2、y All Rights Reserved August 2011 Originating Department: GM Korea Engineering Standards Page 1 of 6 Version : 3 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 p
3、recedence. 1.1 Purpose. The purpose of this standard is to determine the resistance to abrasion of varnishes and other organic coating which have been applied to metallic or rigid non metallic substance. 1.2 Applicability. Abrasion resistance as determined by this standard shall be specified as a me
4、asure of the effect of sand, falling from a defined height onto the inclined surface of the coating. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. BS 410 DIN 1164 DIN 4188 2.2 GM Standards/Specifications. EDS-M
5、-1101 EDS-T-7507 2.3 Additional References. None 3 Resources 3.1 Equipment. 3.1.1 Suitable Saw or Shears. 3.1.2 Elcometer. 3.1.3 Test Sieve to DIN 4188-0.8 mm mesh or BS 410 850, mesh No 18. 3.1.4 Abrasion Test Apparatus (See Figure 1). 3.1.5 Test Sand. 3.1.5.1 The teat sand shall conform to DIN 116
6、4 Sheet 7 grain group (0.5 1.0) mm (Supplier: NORMENSAND GMBH, D-4720 BECKUM). 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 8Td D9 (:0) D8C )%P 07 38%P E:48x 957F$ . 2.1 17 E:4 / . BS 410 DIN 1164 DIN 4188 2.2 GM E:4 / . EDS-M-1101 ED
7、S-T-7507 2.3 dA E:4 / . None 3 4G 88 3.1 4G 8/x . 3.1.1 92F 3 P8 4G D8 4G %L66 F$ . 4 4G 92T0 Gt& DD“8 DGI8x 8*# 4D8 412T0 9E9D8 + 9IF$ . Figure 2: Angle between Test Piece and Guide Tube / ,* 2: 4D0 8T$C/8 5$ 4.3.3 All of the prescribed volume of the test sand (refer to in clause 3.1.5.3) shall be
8、allowed to drop via the guide tube onto the surface of the test piece and subsequently be collected in a suitable vessel. 4.3.4 The collected test sand shall then be returned to the feed funnel, and the progress repeated until the abrasive effect of the test medium has removed as area of approximate
9、ly 35 mm2 of the coating, and the substrate is visible. The total volume of test medium required shall be noted. 5 Data 5.1 Evaluation. The abrasion resistance, expressed as liters test and per m coating thickness shall be calculated using the following equation. 4.3.3 9I%P .Fp8 +( (3.1.5.3 9) 9P9I
10、/ -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 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 ) GM KOREA ENGINEERING STANDARDS EDS-T-7756 Copyright 2011 General Motors Company All Rights Reserved August 2011 Page 6 of 6 Version : 3 Figure 1: Abrasion Test Apparatus / ,* 1: !*+2e 4G d
