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. 2014 by Navistar, Inc. December 2014 Page 1 of 1 NAVISTAR, INC. Material, Parts, and Process Specificati
2、ons (MPAPS) NUMBER: MPAPS BT-33 Former Designation: CEMS BT-33 TITLE: pH Value Test Adapted from ORD JR-OME PD #115 dated 21 November 1956. CURRENT REV No.: 1412 DATE: Dec. 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: CEMS BT-33 - August 2009 PRINTED C
3、OPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION 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 healt
4、h practices and to determine the applicability of regulatory limits prior to use. Change Notice: Update to MPAPS format. 1.0 SCOPE This method covers a procedure for determining the pH value of mixtures of engine cooling system stopleak compounds in distilled water and ethylene glycol base antifreez
5、e. 2.0 APPARATUS 2.1 Apparatus required in ASTM D1287, Test Method for pH of Engine Coolants and Antirusts. 2.2 Balance with a sensitivity of 0.1 gram. 2.3 Graduated cylinder, 200 milliliters. 3.0 MATERIALS 3.1 Materials required to perform ASTM D1287, Test Method for pH of Engine Coolants and Antir
6、usts. 3.2 Screw-cap wide mouth glass jar, 8-ounce. 3.3 Distilled water. 3.4 Antifreeze mixture consisting of equal parts distilled water and MPAPS B-1, Coolant Concentrate, Ethylene Glycol Base. 4.0 PROCEDURE 4.1 Place 5 + 0.1 gram samples of well mixed stopleak compound into two 8-ounce screw-cap w
7、ide mouth glass jars, and add 200 milliliters of distilled water to one jar and 200 milliliters antifreeze mixture to the other jar. 4.2 Cover the jars and shake the contents until thoroughly dispersed. 4.3 Allow the mixtures to stand for 10 minutes. 4.4 Determine the pH values as directed in sectio
8、n 7 (b), ASTM D1287. 5.0 REPORT Report the values obtained as “pH in Distilled Water” and “pH in Coolant Solution”. 6.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
