1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 03 09 N-STATUS No replacement named L. Sinclair, NA 2002 08 27 Revise Updated and renumbered 1977 09 13 SM/EQ 8257 TP Release Printed copies are uncontrolled Page 1 of 2 Copyright 2010, Ford Global Tech
2、nologies, Inc. PHOSPHATE SOLUTION, ZINC PASSIVATING SOLUTION SK-M5B9574-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a chromate (CrIII) passivating solution. 2. APPLICATION This specification was released originally for materials used as passivating agents w
3、ith zinc phosphate coatings. It is used in combination with SKM-5B9574-B Phosphate Solution, Zinc, pH Correction Agent. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials
4、 (WSS-M99P1111-A). 3.2 CHEMICAL COMPOSITION CrIII as Cr 7.0 +/- 0.5 % Test Method 10 mL of the solution are filled up to 1000 mL with distilled water. 15 mL of this solution are mixed with 10 mL diluted sulphuric acid 50 % by volume. Add 2 mL silver nitrate solution (1 %) and 10 g ammonium peroxydis
5、ulphate (NH4)2S208and heat up to boiling. After temperature is above 90 C add 10 mL of a 5 % NaCl solution. Leave boiling for 10 minutes and cool down. Add 25 mL of a 0.1 n FeSO4solution (define factor) Titrate with 0.1 n K2Cr207solution against bariumdiphenylamine sulphonate (1 mL of a 0.3 % contai
6、ning solution in water), from green to blue violet. Consumption: 6.15 +/- 0.2 mL 0.1 n FeSO4 solution 3.3 DENSITY AT 20C 1.14 +/- 0.01 g/cm3(FLTM EU-BI 2-2) ENGINEERING MATERIAL SPECIFICATION SK-M5B9574-A Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 4. GENERAL INFORMATION The informati
7、on given below is provided 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, Alkaline Cleaner SK-M5B9599-A or SK-M5B340-A 4.1.2 Phosphate Solution, Zinc, Start Up ESK-M5B337-A 4.1.3 Phosphate Solution, Zinc, Make Up ESK-M5B338-A 4.1.4 Phosphate Solution, Zinc, Accelerator SM-5B4509-A 4.1.5 Phosphate Solution, Zinc, Activating Agent SK-M5B327-A 4.1.6 Phosphate Solution, Zinc, pH Correction Agent SK-M5B9574-B
