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    INTERN CEMS GT-7G-2009 Distilled Water Immersion Test For Paint《油漆的蒸馏水浸泡试验》.pdf

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    INTERN CEMS GT-7G-2009 Distilled Water Immersion Test For Paint《油漆的蒸馏水浸泡试验》.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 2 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI

    2、FICATION) NUMBER: CEMS GT-7G TITLE: Distilled Water 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 speci

    3、fication 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 pri

    4、or to 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 distilled water. This test method supersedes former

    5、 Distilled Water Immersion Test in GT-7C, now deleted. 2.0 APPARATUS 2.1 Bath capable of maintaining a temperature of 21 to 27C (70 to 80F) 2.2 60 degree glossmeter, Gardner or equivalent 3.0 MATERIAL 3.1 Bonderite CD-10 or Bonderite 958 zinc phosphated steel panels, 100 x 150 mm (4 x 6 inches), ava

    6、ilable from Advanced Coatings Technologies, 273 Industrial Drive, Hillsdale, Michigan 49242. OR Fiber glass reinforced plastic panels available from Materials Engineering, Navistar, Inc., P. O. Box 1109, Fort Wayne, Indiana 46801-1109. 3.2 Distilled water 3.3 Absorbent paper, Kleenex, Kimwipes or eq

    7、uivalent 4.0 PROCEDURE 4.1 Prepare the appropriate quantity and type of panels for the grade of paint being tested according to the procedure specified in Test Method GT-13, Panel Preparation. For Grades -50, -52, -52HS, -52W, -53, and -53A, proceed up to but not including the step in which the prim

    8、ed and dried panels are sanded. 4.1.1 Two steel panels - Grades -32, -32HS, -32HS/Ur, -50, -54, -55, -55W, -61, -62, -81HS, -81W, -82W and -83W 4.1.2 Four steel panels - Grades -53, and -53A 4.1.3 Two fiber glass reinforced plastic panels - Grades -52, -52HS, and -52W Copyright Navistar Internationa

    9、l Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS GT-7G TITLE: Distilled Water Immersion Test For Paint CURRENT ISSUE DATE: August 2009 This document is restricted and may not be sent outside Navista

    10、r, 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 For grades where four panels are prepared, two alternative drying procedures, an air dry and an oven dry, are specified.

    11、For these grades, two panels will be dried according to 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

    12、to this procedure. 4.2 To prevent rusting, cover the unpainted surfaces remaining on each of the panels with a protective coating such as a primer or lacquer. 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

    13、gloss reading of each of the panels using the 60-degree glossmeter. 4.5 Immerse the panels in a bath of distilled water maintained at a temperature of 21 to 27C (70 to 80F) to a depth equivalent to two-thirds of the panel length for the specified time period. 4.6 At the conclusion of the specified i

    14、mmersion period, remove the panels from the distilled water bath and dry with absorbent paper. 4.7 Immediately examine the painted surface of each of the panels for evidence of blistering. 4.8 After examining the panels, age them for two hours in still air at 21 to 27C (70 to 80F). 4.9 Examine the p

    15、ainted surface of each of the panels for evidence of color change. 4.10 Determine and record the gloss reading 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 ex

    16、hibits a dry film which shows no blistering immediately after removal from the liquid and no appreciable color 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 test panels 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-,-,-


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