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-16 TITLE: Chromic Acid Compatibility 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
3、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 the applicability of regulatory limits prior to use
4、 Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a test method to determine the Chromic Acid compatibility of primers. 2.0 APPARATUS 2.1 Holding tank, - 3.7 liter (1 gallon) can or similar container 2.2 Recirculat
5、ing pump 3.0 MATERIAL 3.1 3 percent, by weight, Chromic Acid solution 3.2 Appropriate solvent for primer being tested 4.0 PROCEDURE 4.1 Dilute primer to a viscosity of 16 to 18 seconds, as measured with a No. 4 Ford Cup per ASTM D 1200. 4.2 Determine total solids content. 4.3 Place approximately 2 l
6、iters of reduced primer into tank and add 1%, by volume, of 3% Chromic Acid solution. 4.4 Circulate the reduced primer, at a rate of 1 liter per hour, for four days at 21 to 27C (70 to 80F). 4.5 Determine total solids for primer with viscosity readjusted to 16 seconds. 5.0 REPORT Report percent loss of total solids. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
