INTERN CEMS GT-14B-2009 Acid Spot Test《酸斑点试验》.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 by Navistar, Inc. AUGUST 2009 Page 1 of 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI

2、FICATION) NUMBER: CEMS GT-14B TITLE: Acid Spot Test 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 haza

3、rdous 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 evaluating the resistance of a dry paint film to industrial atmosphere. 2.0 APPARATUS Recirculating oven capable of maintaining 60 + 3C (140 + 5F) 3.0 MATERIAL 3.1 A s

5、olution of 0.5% hydrochloric acid in distilled water. 3.2 Small eyedropper 3.3 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. 4.0 PROCEDURE 4.1 Prepare a panel

6、 according to procedure specified for the appropriate grade per Test Method GT-13, Panel Preparation. 4.2 Age panel at 60 + 3C (140 + 5F) for 72 hours and cool to 21 to 27C (70 to 80F). 4.3 Apply a drop of the acid solution to the painted surface and allow it to evaporate overnight (16 hours). 4.4 A

7、t the end of the evaporation period, wash the panel with water and compare test area to the remainder of the panel. Any change in gloss and/or color will constitute a failure. 5.0 REPORT Report pass or fail. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-