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-15 TITLE: Ferroxyl 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 hazard
3、ous 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: R
4、eplaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method to reveal discontinuities, such as pores, in coatings of tin, nickel, copper, cobalt or chromium on iron or steel. 2.0 MATERIAL A test solution prepared by dissolving 10 g a
5、gar, 10 g sodium chloride and 1 g potassium ferricyanide in 1 liter of warm distilled water. 3.0 PROCEDURE 3.1 Clean and degrease the surface to be tested with methyl alcohol. 3.2 Slowly warm the test solution to 93C (200F) to liquefy it. 3.3 Apply the warmed test solution to the specimen by one of
6、the following methods: 3.3.1 dip specimen into solution 3.3.2 pour solution over specimen 3.3.3 dip a piece of filter paper into the solution; allow the excess to drain off then apply to test area and allow to remain undisturbed. Do not apply the solution if its temperature is below 60C (140F). 3.4
7、Suspend specimen, without touching the coating, in a horizontal position at 21 to 27C (70 to 80F) for the period specified. 3.5 At the end of this period examine coating or remove filter paper and examine face that was in contact with specimen. Blue spots indicate basis metal corrosion or porosity.
8、4.0 REPORT 4.1 The area of surface tested. 4.2 Total number and the size of all spots visible to the unaided eye. 4.3 The highest number of spots visible at one time through a template with a 25 x 25 mm (1 x 1 inch) opening in it, when placed on the surface. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
