1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2002 08 19 Revised Updated and renumbered 1987 12 18 SM/EQ 1579 TP Released C. Herriott Printed copies are uncontrolled Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. PHOSPHATE SOLUTION, ZINC, PA
2、SSIVATING ESK-M5B326-A SOLUTION 1. SCOPE The material defined by this specification is a passivating solution. 2. APPLICATION This specification was released originally for material used as a Chromate-III/Chromate-IV passivating solution for dip or spray zinc phosphate operations. 3. REQUIREMENTS 3.
3、1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION Chromium VI as Cr : 10.0 +/- 1.0 % Total chromium : 14.0 +/- 1.0 % 3.3 TITRATION 5.8 +/- 1.0 m
4、L 8 ml of the solution are filled up to 1000 ml with distilled water. 10 ml of this solution are filled up to 100 ml with distilled water. Add 20 drops sulphuric acid (50 %) and about 0.5 g potassium iodide. Titrate with 0.1 n sodium thiosulphate to colour change brown to yellow. Add indicator starc
5、h solution ( 5 ml ). Titrate dropwise until blue-black colour disappears. 3.4 DENSITY AT 20 C 1.25 +/- 0.02 kg/L (FLTM EU-BI 2-2) ENGINEERING MATERIAL SPECIFICATION ESK-M5B326-A Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 4. GENERAL INFORMATION The information given below is provided
6、for clarification and assistance in meeting the requirements of this specification. 4.1 The phosphate system released by this specification consists of the following materials: 4.1.1. Phosphate Solution Zinc, Start Up ESK-M5B337-A 4.1.2. Phosphate Solution, Zinc, Make Up ESK-M5B338-A 4.1.3. Phosphate Solution, Zinc, Accelerator S-M5B4509-A 4.1.4. Phosphate Solution, Zinc, Alkaline Cleaner SKM-5B9599-A or ESK-M5B340-A 4.1.5 Phosphate Solution, Zinc, Activating Agent ESK-M5B327-A
