1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2003 03 13 Revised Para 3.0 Inserted; Para 3.1, 3.2, 3.3, 3.7, 3.8, 4 Deleted 2000 02 14 Activated N. Chamberlain/A. Reilly Printed copies are uncontrolled Page 1 of 2 Copyright 2003, Ford Global Technologie
2、s, Inc. PHOSPHATE SOLUTION, ZINC, INITIAL FILL WSS-M3B77-A1 PHOSPHATE SOLUTION, ZINC, FEED MATERIAL WSS-M3B77-A2 1. SCOPE The materials defined by these specifications are the basic components for the automotive zinc phosphating process, containing zinc, nickel, and manganese. 2. APPLICATION These s
3、pecifications were originally released for tri-cation phosphate bath materials used in automotive assembly plants. WSS-M3B77-A1: This specification is used for the initial fill of dip or spray phosphate systems. WSS-M3B77-A2: This specification is used for feed materials to replenish phosphate syste
4、ms. Feed materials per this specification must not contain accelerator components. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL COMPA
5、TIBILITY The supplier of this material shall keep abreast of changes in technology of related materials e.g., sealers and 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
6、 incompatibility is anticipated. 3.5 COMPOSITION Supplier must maintain the following characteristics to a maximum tolerance of plus or minus 10% 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 pa
7、rt of the Control Plan as required in 3.0. ENGINEERING MATERIAL SPECIFICATION WSS-M3B77-A1/A2 Page 2 of 2 Copyright 2003, Ford Global Technologies, Inc. 3.5.1 Chemical Composition Zinc (Zn), Initial Sample +/- 5% Manganese (Mn), Initial Sample +/- 5%Nickel (Ni), Initial Sample +/- 5% Phosphate as P2
8、O5, Initial Sample +/- 5% Nitrate as NO3, Initial Sample +/- 5% Fluoride (F), Initial Sample +/- 5% Any other essential components of the formulation must also be noted in the Initial Sample Report of the phosphate solution (excluding accelerator). 3.5.2 Density, kg/L at 25 C Initial Sample (ASTM D
9、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.
