1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2003 03 13 Revised Para 3.0 Inserted; Para 3.1, 3.3, 3.7, 4 Deleted 2000 08 09 Activated T. Reilly N. Chamberlain Printed copies are uncontrolled Page 1 of 2 Copyright 2003, Ford Global Technologies, Inc. PH
2、OSPHATE SOLUTION, ZINC, INTERNALLY WSS-M3B78-A1 ACCELERATED, INITIAL FILL PHOSPHATE SOLUTION, ZINC, INTERNALLY WSS-M3B78-A2 ACCELERATED, FEED MATERIAL 1. SCOPE The materials defined by these specifications are the basic components for the automotive internally accelerated zinc phosphating process, c
3、ontaining essentially zinc phosphate. 2. APPLICATION These specifications were originally released for internally accelerated phosphate bath materials used in automotive assembly plants. WSS-M3B78-A1: This specification is used for the initial fill of dip or spray phosphate systems. WSS-M3B78-A2: Th
4、is specification is used for feed materials to replenish phosphate systems. Feed materials per this specification contains accelerator components. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requiremen
5、ts For Production Materials (WSS-M99P1111-A). 3.2 MASS SPECTROSCOPY Ford Motor Company, at its option, may conduct mass spectroscopy and/or other analysis of material/parts supplied to this specification. The analyses established for initial approval shall constitute the reference standard and shall
6、 be kept on file at the designated material laboratory. All samples shall be the same composition as the reference standard when tested under the same conditions. 3.4 MATERIAL COMPATIBILITY The supplier of this material shall keep abreast of changes in technology of related materials e.g., sealers a
7、nd adhesives, which may affect the compatibility and performance of this product. The supplier shall notify the appropriate Ford Product Materials Engineering Office in writing when incompatibility is anticipated. ENGINEERING MATERIAL SPECIFICATION WSS-M3B78-A1/A2 Page 2 of 2 Copyright 2003, Ford Gl
8、obal Technologies, Inc. 3.5 COMPOSITION Supplier must maintain the following characteristics to a maximum tolerance of plus or minus 5% of the initial sample or as reported with the initial sample. All other essential components must be reported with the initial sample and maintained as part of the
9、Control Plan as required in 3.1 3.5.1 Chemical Composition Zinc (Zn), Initial Sample +/- 5% Manganese (Mn), Initial Sample +/- 5% Nickel (Ni), Initial Sample +/- 5% Phosphate as P2O5, Initial Sample +/- 5% Nitrate as NO3, Initial Sample +/- 5% Fluoride (F), Initial Sample +/- 5% Accelerator Componen
10、t (s) Initial Sample +/- 5% Any other essential components of the formulation must also be noted in the Initial Sample Report of the phosphate solution. 3.5.2 Density, kg/L at 25 C Initial Sample (ASTM D 1475) +/- 0.03 For liquid material density of the material as supplied. For powder density of an aqueous solution (concentration to be defined by supplier and noted in the Initial Sample Report). 3.6 RESISTANCE PROPERTIES The material defined by this specification must be used with a phosphate system and in conjunction with the phosphate system must meet the requirements of WSS-M3P1-D.
