1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 29 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.3, 3.7, 4 deleted 1996 10 10 Revised Revised Para 3.4.1 and 3.4.2 1996 10 02 Activated N. Chamberlain J. Faunt A. Reilly Printed copies are uncontrolled Copyright 2003, Ford Global Technol
2、ogies, Inc. Page 1 of 3 PERFORMANCE, PHOSPHATE COATING, ZINC WSS-M3P1-D 1. SCOPE This specification defines the performance requirements of a zinc phosphate coating on automotive parts which are subsequently painted. 2. APPLICATION This specification was released originally for phosphate coatings us
3、ed for iron, steel, zinc or zinc alloy coated steel or zinc parts where maximum paint adhesion and corrosion resistance are required. It is to be used for aluminum only when processed concurrently with steel parts. The coating provides a clean grease-free surface for painting, improves adhesion of t
4、he paint film and inhibits spread of corrosion when the paint film is broken. 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). 3.2 MASS SPECTROSCOPY F
5、ord 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 be kept on file at the designated material laboratory. All samples s
6、hall produce the same analyses that correspond to the reference standard when tested under the same conditions. 3.4 PHYSICAL PROPERTIES 3.4.1 Coating Weight (FLTM AQ 101-01 or 101-02) The coating weight as defined below must only be used with the materials described. Note: When phosphate solutions w
7、ith high Nickel or Manganese contents are in use, the chromic acid test (FLTM AQ 101-01) should be used. 3.4.1.1 Coating Weights for Dip Systems Cold Rolled Steel 1.3 - 3.8 g/m2Zinc coated Steel 1.6 - 4.3 g/m2Galvannealed Steel 2.5 - 6.0 g/m2Aluminum 1.6 - 4.5 g/m2ENGINEERING MATERIAL SPECIFICATIONW
8、SS-M3P1-DPrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 2 of 3 3.4.1.2 Coating Weights for Spray Systems Cold Rolled Steel 1.3 - 3.8 g/m2Hot Rolled Steel 1.5 - 3.0 g/m2Zinc coated Steel 1.6 - 4.0 g/m2Galvannealed Steel 2.5 - 6.4 g/m2Aluminum 1.3 - 3.5 g/m23.4.2 C
9、rystal Size Measurements conducted with 1000 magnification SEMs. 3.4.2.1 Crystal Sizes for Dip Systems 25 microns (for all substrates, max) 3.4.2.2 Crystal Sized for Spray Systems 25 microns (for all substrates, max) 3.5 PREPARATION OF TEST PANELS In order to eliminate variables in testing productio
10、n parts, test shall be conducted on standard test panels prepared in accordance with Ford Manufacturing Standard U-MA001-8001 and relevant precoated steel substrates in current production quality according to para 3.4. Three panels must be prepared representing nominal conditions. 3.5.1 Phosphate Co
11、at Process panels through complete cycle of phosphate coating system under test, including cleaning, crystal refinement, phosphating, passivation, deionized water final rise and drying. Panels processed to this point shall be used for coating weight determination (para 3.4.1) and crystal size (para
12、3.4.2). Panels for paint adhesion and resistance tests shall be further processed as indicated in para 3.5.2. 3.5.2 Paint System Apply paint system as used in production with electrocoat primer, primer surfacer and white top coat as appropriate. Materials shall be applied, baked and aged in accordan
13、ce with individual material specifications. 3.6 RESISTANCE PROPERTIES 3.6.1 Adhesion, max Grade 1 (FLTM BI 106-01, Procedure B) 3.6.2 Stone Chip Resistance, max Rating 6 (FLTM BI 157-06) 3.6.3 Water Immersion 240 h (FLTM BI 104-01)No blistering, loss of gloss or loss of adhesion accepted. ENGINEERIN
14、G MATERIAL SPECIFICATIONWSS-M3P1-DPrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 3 3.6.4 Salt Spray 480 h (FLTM BI 103-01) Test to be performed on iron and steel substrates only. Scribe panels after painting to the bare metal. Failure shall be defined as bli
15、sters, rust or loss of adhesion exceeding 3 mm from scribe line. 3.6.5 Florida Exposure 3 Months (SAE J1976, Procedure A plus twice weekly spray application of 5% saline salt solution) Panels scribed as in para 3.6.4 after painting. Failure shall be defined as blisters, rust or loss of adhesion exceeding 3 mm from scribe line. 3.6.6 Resistance to Scab corrosion, max 3 mm creep from (FLTM BI 123-01) the scribe Iron & Steel 15 Cycles Zinc/Zinc alloy coatings and Aluminum 50 Cycles
