1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7762 Determination of the Resistance to Corrosion of Organic Coating Under Cycle Alternating Conditions Do Not Use on New Program; No Replacement. 3PG97 8F 8TdD98 -=2e 4G Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyri
2、ght 2011 General Motors Company All Rights Reserved August 2011 Originating Department: GM Korea Engineering Standards Page 1 of 4 Version : 5 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, th
3、e Korean language shall take precedence. 1.1 Purpose and Applicability. This standard specifies the test method for measuring the resistance to corrosion of organic coatings under laboratory cyclic alternating conditions. 2 References Note: Only the latest approved standards are applicable unless ot
4、herwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. EDS-T-7005 EDS-T-7143 2.3 Additional References. None 3 Resources 3.1 Test Piece. 3.1.1 Preparation of Test Pieces. 3.1.1.1 Test pieces can be taken from wherever in the parts. In case that it is impossib
5、le to take test pieces, specially prepared test pieces shall be prepared. (Minimum area: 250 cm2). 3.1.1.2 Such test pieces shall have the largest possible size and shall be cut such that the edges neither heavily mechanically deformed nor subjected to excessive temperatures. All cut edges shall be
6、protected in a suitable manner e.g. with adhesive tapes, protective paints. 3.1.1.3 For all tests the test piece shall be scribed in a straight line through to substrate material and over the length of the test piece. 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72
7、T8p) F$ . 1.1 +95 -C 957 -88 . ., E:48t 4G 495 3PG 97 $4F 8TdD98 -= 2e#8x D4Fd 88F 4G -7 $4F7 9IF 8$ . 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 / . EDS-T-7005 EDS-T-7143 2.3 dA E:4 / . None 3 4G 88 3.1 4G D . 3.1.1 4G D8 :4/x . 3.1.1.1 4G D8t .E8 6# 7
8、2P$ =x? 4#F+ , 4D =x?4 .4#F 7 C-H :4/x%P 4G D8x :4/xF$ . (+95 min. 250cm2). 3.1.1.2 4D =x? 4 4#F $48 A d) =x?F+ , 4D 92F 3 P8 4G D8 Fx7F 9Id958 E:4* 4G 8x 88F2P# 2F 1P8 4G D8 Fx7F$ . 4 4G 9) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 5 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 )
