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 1 NAVISTAR, INC. CEMS (CORPORATE ENGINEERING MATERIAL SPECI
2、FICATION) NUMBER: CEMS BT-17 TITLE: Oxidation Stability 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 in
3、volve 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 use. Chan
4、ge Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive. 1.0 SCOPE This method covers a procedure to determine the stability of gasoline under accelerated oxidation conditions. 2.0 APPARTUS Oxidation bomb, glass sample container and cover, press
5、ure gage, oxidation bath, thermometer, 100 milliliter volumetric flask, balance with a sensitivity of 0.1 milligram, 1 milliliter pipette and accessories per ASTM D 525. 3.0 MATERIAL 3.1 Cupric acetate, Cu(C2H3O2).H2O, ACS. 3.2 Benzene, ACS 3.3 Glacial acetic acid, ACS. 3.4 Materials per ASTM D 525.
6、 4.0 PROCEDURE 4.1 Prepare a solution of cupric acetate in benzene as follows: Completely dissolve 65 milligrams of copper acetate in 16.25 grams of glacial acetic acid. Dilute to 100 milliters total volume with benzene. (This solution contains 0.20 milligrams of copper per 1.0 milliliter of solution.) 4.2 Add 1.0 milliliter of the above solution to 50 + 1 milliliters of gasoline in the glass sample container. Then test in accordance with ASTM D 525. 5.0 REPORT Report the results as “induction period at 212 F (100 C)”.
