INTERN CEMS GT-4J-2009 Bleeding Of Paint《油漆渗色》.pdf

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 Navistar, Inc. AUGUST 2009 Page 1 of 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFIC

2、ATION) NUMBER: CEMS GT-4J TITLE: Bleeding 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 involve hazar

3、dous 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. Change Notice:

4、Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method for determining if an undercoat enamel discolors a subsequent top coat of enamel by bleeding. 2.0 MATERIAL 2.1 Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels

5、, 100 x 300 mm (4 x 12 inches), available from Advanced Coatings Technologies, 273 Industrial Drive, Hillsdale, Michigan 49242. 2.2 Masking tape, 75 mm (3 inches) wide 2.3 No. 280 stearated sandpaper 2.4 Xylene, industrial grade 2.5 Tack rag 3.0 PROCEDURE 3.1 Using masking tape as shown in figure at

6、 right, cover the central portion of the panels. 3.2 Prepare the panels according to the procedure specified for the applicable grade in Test Method GT-13, Panel Preparation. 3.3 Scuff (dry sand lightly) all of Area A. Wipe with xylene and then with a tack rag. 3.4 Remove the masking tape from panel

7、s and wipe with a tack rag. 3.5 Spray NAV9219 or white enamel of the same grade under test over the entire panel as described in Panel Preparation for that grade. 3.6 Overbake (double specified oven drying period) or air dry as applicable to the grade being tested. 3.7 Examine overbaked panels immed

8、iately after removal from the oven and air dried panels after they are tack free. Re-examine after 24 hours. Any evidence of color differences between the three sections of the panel will constitute a failure. 4.0 REPORT Report pass or fail. MA SKA R EAA A R EAB114 m m( 4.5 in ch e s)75 m m( 3 in ch es) Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-