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-7J TITLE: Antifreeze Immersion Test For 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 specificat
3、ion 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
4、 use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method for evaluating the ability of a dry film of paint to withstand degradation due to immersion in a 50% aqueous, commercial antifreeze (ethylene glycol or
5、 propylene glycol )solution. This test method supersedes former Ethylene Glycol Immersion Test in GT-7C, now deleted. 2.0 APPARATUS 2.1 Bath capable of maintaining a temperature of 82 + 3C (180 + 5F) 2.2 60 degree glossmeter, Gardner or equivalent 3.0 MATERIAL 3.1 Bonderite CD-10 or Bonderite 958 zi
6、nc phosphated steel panels, 100 x 150 mm (4 x 6 inches), available from Advanced Coatings Technologies, 273 Industrial Drive, Hillsdale, Michigan 49242. 3.2 Distilled water 3.3 Ethylene glycol 3.4 Absorbent paper, Kleenex, Kimwipes or equivalent 4.0 PROCEDURE 4.1 Prepare the appropriate quantity of
7、panels for the grade of paint being tested according to the procedure specified in Test Method GT-13, Panel Preparation. For Grades -50, -50T -53, and -53A, proceed up to but not including the step in which the primed and dried panels are sanded. 4.1.1 Two panels - Grades -17, -17HS, -18, -19, -19HS
8、 -32, -32HS, -32HS/Ur, -50, -54, -55, -55W, -61, -62, -81HS, -81W, -82W, and 83W 4.1.2 Four panels - Grades -53, and -53A For grades where four panels are prepared, two alternative drying procedures, an air dry and an oven dry, are specified. For these grades, two panels will be dried according to
9、the air drying procedure and the remaining two panels will be dried according to the oven drying procedure. For grades where two panels are prepared, only one drying procedure is specified; for these grades, both panels will be dried according to this procedure. 4.2 To prevent rusting, cover the unp
10、ainted surfaces remaining on each of the panels with a protective coating such as a primer or lacquer. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS GT-7J TITLE: An
11、tifreeze Immersion Test For 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
12、 2 of 2 4.3 Age the prepared panels for 72 hours at 49 + 3C (120 + 5F). 4.4 At the conclusion of this aging period, determine and record the initial gloss reading of each of the panels. 4.5 Prepare a solution of 50% distilled water and 50% ethylene glycol, fill the bath and bring to a temperature of
13、 82 + 3C (180 + 5F). 4.6 Immerse the panels in this bath to a depth equivalent to two-thirds of the panel length for five minutes. 4.7 At the conclusion of this immersion period, remove the panels from the bath and dry with absorbent paper. 4.8 Immediately examine the painted surface of each of the
14、panels with the unaided eye for evidence of blistering. 4.9 After examining the panels, age them for two hours in still air at 21 to 27C (70 to 80F). 4.10 Examine the painted surface of each of the panels with the unaided eye for evidence of color change. 4.11 Determine and record the gloss reading
15、after immersion of each of the panels, again using the 60 degree glossmeter. 5.0 REPORT Report whether the paint passes or fails this test. The paint will pass if each of the test panels exhibits a dry film which shows no blistering immediately after removal from the liquid and no appreciable color
16、change, nor more than 10 points loss of gloss two hours after removal from the liquid. For those grades where two panels are prepared, both will pass. For those grades where four panels are prepared, both air dried and both oven dried test panels will pass. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
