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 BT-2 TITLE: Insoluble Deposits Test (U.S. Patent No. 2,931,219) CURRENT ISSUE DATE: August 2009 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 2001 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION
3、 This specification 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
4、 limits prior to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a test procedure for the determination of insoluble deposits in engine cooling system fluids. 2.0 APPARATUS 2.1 Low form beaker, 400
5、ml 2.2 Glass rod, 0.25 inch (6mm) diameter 2.3 110 volt variable transformer, Powerstat, Type 116 or equivalent 2.4 Ammeter, capable of measuring 2.0 and 7.0 0.2A 2.5 Balance with a sensitivity of 0.1 mg 3.0 MATERIAL 3.1 New, clean “Nichrome” wire 80 percent nickel, 20 percent chromium, 26 gage 0.01
6、59 inch (0.404 mm) 10 inches (250 mm) long 3.2 Test fluids: 3.2.a NAVISTAR CEMS B-1, Antifreeze: 50 percent solution of antifreeze in distilled water mixed in accordance with ASTM D 1176, Section 5.3. 3.2.b Cooling system fluid mixtures as required in the appropriate specification. 3.3 Lintless clot
7、h or soft tissue paper (Kleenex or equivalent). 3.4 Isopropanol, reagent grade. 4.0 PROCEDURE 4.1 Coil the wire around the rod, forming 8 or 9 turns with an overall length of approximately 1.5 inches (38mm). 4.2 Clean the coil by immersing in warm isopropanol and allow to air dry. Copyright Navistar
8、 International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: CEMS BT-2 TITLE: Insoluble Deposits Test (U.S. Patent No. 2,931, 219) CURRENT ISSUE DATE: August 2009 This document is restricted and may not
9、 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 4.3 Weight the coil to the nearest 0.1 mg, assemble as shown in drawing below and immerse to with
10、in 0.5 inch (13 mm) of the bottom of the beaker containing 250 ml of the appropriate test fluid mixture. 4.4 Pass an electric current of 7.0 0.2 A through the coil for a period of 10 minutes then remove the wire coil from the solution. 4.5 Remove the excess fluid by gently shaking or blotting. 4.6 D
11、ry the coil in air with 2 amperes current applied (suggested time is less than 1 minute) CAUTION: Use extreme care not to “over dry” the coil as this will cause flaking. 4.7 Reweigh the coil to the nearest 0.1 mg. 5.0 REPORT Report the change in weight in milligrams for each fluid tested. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
