NAVISTAR-CEMS-GT-7E-2007.pdf
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1、This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2007 by International Truck and Engine Corporation. INTERNATIONAL TRUCK AND E
2、NGINE CORPORATION CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION) NUMBER: CEMS GT-7E TITLE: Humidity Test For Paint CURRENT ISSUE DATE: August 2007 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: August 2001 PRINTED COPIES OF THIS DOCUMENT MUST
3、BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine
4、 the applicability of regulatory limits prior to use. Change Notice: Changed referenced standards for the apparatus geometry. 1.0 SCOPE This is a method for evaluating the ability of a dry film of paint to withstand degradation upon prolonged exposure to humid environment. 2.0 APPARATUS Humidity cab
5、inet equipment per ASTM D 2247; Optional: ASTM D 4585. 3.0 MATERIAL 3.1 Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels, 100 x 200 mm (4 x 8 inches), available from Advanced Coatings Technologies, 273 Industrial Drive, Hillsdale, MI 49242. 3.2 Fiber glass reinforced plastics (FRP) pane
6、ls available from Materials Engineering, International Truck and Engine Corporation, P. O. Box 1109, Fort Wayne, IN 46801-1109. 4.0 PROCEDURE 4.1 Panel Preparation - Prepare the appropriate quantity and type of panels for the coating being tested according to the procedure specified in Test Method G
7、T-13, Panel Preparation. For Grades -50, -53, and -53A, proceed up to but not including the step in which the primed and dried panels are sanded. For Grades -52, -52HS, and -52W proceed up to but not including the step in which the primed and dried panels are separated into two groups. 4.1.1 Two ste
8、el panels - Grades -17, -17HS, -18, -19, -19HS, -29, -29HS, -29T, -29THS, -43W, -50, -54, -55, -55W, -56, -81HS, -81W, -82W, and 83W 4.1.2 Four steel panels - Grades -33, -53, and -53A 4.1.3 Four FRP panels - Grades -52, -52HS, and -52W (for each substrate to be tested) For grades where four panels
9、are prepared (except Grades -52 and -52HS), two alternative drying procedures, an air dry and an oven dry, are specified. For these grades, two panels will be dried according to the drying procedure and the remaining two panels will be dried according to the oven drying procedure. For Grades -52 and
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