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-25 TITLE: Chip Resistance 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 inv
3、olve 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. Chang
4、e Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method for determining the chip resistance of a dry film of paint. 2.0 APPARATUS 2.1 Recirculating oven capable of maintaining a temperature of 49 3C (120F 5F) 2.2 Tooke
5、 paint inspection gauge with 10X cutting tip; available from P.N. Gardner Co., 316 N.E. First St., Pompano Beach, Florida 33061-6688. 3.0 MATERIAL 3.1 Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels, 100 x 150 mm or 100 x 300 mm (4 x 6 or 4 x 12 inch), available from Advanced Coatings
6、Technologies, 273 Industrial Drive, Hillsdale, Michigan 49242. 4.0 PROCEDURE 4.1 Prepare two panels using the procedure specified for the applicable paint grade as per CEMS Test Method GT-13, Panel Preparation. 4.2 For Grades -32, -32HS, age the panels for 72 hours in a recirculating oven at 49 3C (
7、120F 5F), remove panels and cool to 21 - 27C (70F - 80F). 4.3 Using the Tooke gage with 10X cutting tip, make a single cut or scribe approximately 3 inches long through the paint film and into the metal substrate. The cut should be made in a single pass and must go through the paint film, and into t
8、he substrate. 4.4 Examine the paint film along the cut with the unaided eye for evidence of chipping. Compare the results to figures 1 and 2. Two additional re-tests in other locations on the panel are permissible, i.e., repeat the cut made in step #3 in order to obtain a satisfactory test. 4.5 Pass
9、/Fail criteria are illustrated in figures 1 and 2. To be considered a pass, neither panel shall exhibit chipping behavior exceeding that shown in figure 1. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted with
10、out license from IHS-,-,-NUMBER: CEMS GT-25 TITLE: Chip Resistance Of Paint CURRENT ISSUE DATE: August 2009 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 2 of 2 5.0 REPORT Pass/Fail criteria are shown in figures 1 and 2 below: PASS FAIL Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
