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 Navistar, Inc. AUGUST 2009 Page 1 of 2 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECIFIC
2、ATION) NUMBER: CEMS BT-46 TITLE: Reducing Ion Test 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 This specification may involve haza
3、rdous 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:
4、 Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a procedure to determine the compatibility of antifreeze with chromate filter elements based on sludge formation. (This test is adapted from Cummins Engine Companys proc
5、edure for “Checking Antifreeze Compatibility with Chromate Filter Elements”.) 2.0 APPARATUS 2.1 Analytical balance with a sensitivity of 1 milligram. 2.2 Oven capable of maintaining a temperature of 165 + 2F (74 + 1C). 2.3 Centrifuge capable of 10 000 relative centrifugal force (rcf). sc e n tim e t
6、e rins w in gofd ia m e te rr p mr c f 422 2 in c h e sins w in gofd ia m e te rr p mr c f 2 6 5 2 3.0 MATERIAL 3.1 Sodium chromate, anhydrous, ACS 3.2 Calcium acetate, monohydrate, ACS 3.3 Distilled water. 3.4 1 liter volumetric flask. 3.5 50 milliliter graduated cylinder. 3.6 100 milliliter centri
7、fuge tube with stopper to fit. Tube must be capable of withstanding 10 000 rcf. 4.0 PROCEDURE 4.1 Prepare sodium chromate solution by dissolving 35 grams of anhydrous sodium chromate in 1 liter of distilled water. 4.2 Prepare a calcium acetate solution by dissolving 0.220 grams of calcium acetate mo
8、nohydrate in 1 liter of distilled water. NUMBER: CEMS BT-46 TITLE: Reducing Ion Test 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
9、 liability. 2009 Navistar, Inc. AUGUST 2009 Page 2 of 2 4.3 Add 10 milliliters of the chromate solution and 40 milliliters of the calcium acetate solution to the 100 milliliter centrifuge tube. 4.4 Add 50 milliliters of test antifreeze to the centrifuge tube. Stopper and shake thoroughly. 4.5 Tape stopper down. Place in oven at 165F (74C) for 96 hours. 4.6 At the end of 96 hours, remove and cool to room temperature. Centrifuge for 15 minutes at 10 000 rcf. Read the sludge level to the nearest 0.1 ml. 5.0 REPORT Report the volume of sludge.
