1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 1 of 2 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI
2、FICATION) NUMBER: CEMS GT-5B TITLE: Intercoat Adhesion Of Paint CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: August 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may
3、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 the applicability of regulatory limits prior to use. Ch
4、ange Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 INTRODUCTION This is a method for evaluating the ability of a dry film of paint to adhere to a dry film of primer or a dry film of top coat. 2.0 APPARATUS Recirculating oven capable
5、of maintaining a temperature of 49 + 3C (120 + 5F) 3.0 MATERIAL 3.1 Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels, 100 x 150 mm (4 x 6 inches), available from Advanced Coatings Technologies, 273 Industrial Drive, Hillsdale, Michigan 49242. OR Fiber glass reinforced plastic panels ava
6、ilable from Materials Engineering, International Truck and Engine Corporation, P. O. Box 1109, Ft. Wayne, Indiana 46801-1109. 3.2 No. 360 sandpaper, Permacell #99, or 3M etc. 3.3 Transparent cellophane tape, 3M Co. No. 610 available from Gardner Laboratories or from local 3M distributors. 3.4 Tack r
7、ag 3.5 Scribing knife 4.0 PROCEDURE 4.1 Prepare the appropriate quantity and type of panels for the grade of paint being tested according to the procedure specified in Test Method GT-13, Panel Preparation. For Grades that are oven dried double the specified drying time (overbake). 4.1.1 Two Bonderit
8、e CD-10 or Bonderite 958 zinc phosphated steel panels - Grades -17, -17HS, -18, -19, -19HS, -29, -29HS, -29T, -29THS, -50, -55, and -55W 4.1.2 Four Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels - Grades -53 and -53A 4.1.3 Two fiber glass reinforced plastic panels - Grades -52, -52HS,
9、 and -52W For Grades -53, -53A, -55, and -55W where four panels are prepared, two alternative drying procedures, an air dry and an oven dry, are specified. For these grades, two panels will be dried according to the air drying procedure and the remaining two panels will be overbaked according to the
10、 oven drying Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS GT-5B TITLE: Intercoat Adhesion Of Paint CURRENT ISSUE DATE: August 2009 This document is restricted and
11、may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. AUGUST 2009 Page 2 of 2 procedure. For grades where two panels are prepared, only one drying procedure is specifie
12、d; for these grades, both panels will be dried according to this procedure. 4.2 For Grades -17, -17HS, -18, -19, -19HS, -29, -29HS, -29T, and -29THS, wet sand both of the prepared panels for one-half of their length with No. 360 sandpaper. Wash these panels in water, dry wipe with industrial grade x
13、ylene, dry with absorbent paper and wipe with a tack rag. Apply another coat of the same enamel to both of the prepared panels and again dry according to the procedure outlined in Panel Preparation. 4.3 For all grades, age the panels for 72 hours in a recirculating oven at 49 + 3C (120 + 5F), remove
14、 and cool to 21 to 27C (70 to 80F). 4.5 Scribe panels using the procedure described in Test Method GT-5A 5.0 REPORT Report Pass or Fail using criteria of GT-5A Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
