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-1A TITLE: Nonvolatile Content Of Paint By Weight 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 specifi
3、cation 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
4、 to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This is a method to determine nonvolatile (solids) content of paint by weight. 2.0 APPARATUS 2.1 2.1 Plastic disposable syringe, 5 ml capacity, B-D Luer Lok No. 805
5、L/S or equivalent. 2.2 2.2 Recirculating oven which maintains a temperature of118 3C (245 5F). 2.3 2.3 Balance with a sensitivity of 0.0001. 2.4 2.4 Desiccator. 2.5 2.5 A syringe holding yoke, constructed from Nichrome wire. 2.6 2.6 This attachment is used to hold syringe vertically during weighing
6、operation. (See illustration) 3.0 MATERIAL 3.1 Aluminum foil pan, 60 mm in diameter, Wilkens-Anderson No. 29025 or equivalent 3.2 Absorbent paper, Kleenex, Kimwipes or equivalent 4.0 PROCEDURE 4.1 Run this test five times for each paint sample being tested. 4.2 Determine the weight of the aluminum p
7、an to + 0.0001 gram and record as weight W1. 4.3 Transfer 2 to 3 milliliters of paint which has been prepared for testing according to the steps outlined in CEMS G-5, Part I, Section B, under ”Sampling Procedure”, to the plastic syringe. Do not allow perspiration to accumulate on the syringe during
8、handling. 4.4 After transferring the sample to the syringe, pull the syringe piston back slightly to draw the sample deeply into the orifice tip. Wipe the syringe tip with absorbent paper to clean the paint away. 4.5 Determine the total weight of the sample and syringe to + 0.0001 gram and record as
9、 weight W2. Weigh as rapidly as possible, preferably on a projection balance, keeping syringe in vertical position with a yoke accessory so that syringe opening is on top. 4.6 After transferring approximately 1 gram of paint from the syringe to the aluminum foil pan, reweigh the sample and syringe t
10、o + 0.0001 gram and record as weight W3. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS GT-1A TITLE: Nonvolatile Content Of Paint By Weight CURRENT ISSUE DATE: Augus
11、t 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 2 of 2 4.7 Flow the paint around the pan to obtain as thin
12、 a coat as possible by tilting the pan in various directions. Allow solvents to flash off for 15 minutes in still air at 21 to 27C (70 to 80F). 4.8 Place the foil pan and sample in a recirculating oven preheated to 118 + 3C (245 + 5F). After two hours, remove and cool in a dessicator to 21 to 27C (7
13、0 to 80F). 4.9 Reweigh the foil pan and sample to + 0.0001 gram and record as weight W4. 5.0 CALCULATIONS Calculate the nonvolatile content of the paint on a weight basis for each of the five test runs: Percent nonvolatile content by weight = W4-W1W2-W3x 100 6.0 REPORT Report the minimum percent nonvolatile content by weight obtained from the five test runs. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
