1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2013 01 09 Revised Removed test method from Sec. 3.3 C. Mracna, NA 2003 08 14 Activated J. M. Showalter Controlled document at www.MATS Copyright 2013, Ford Global Technologies, Inc. Page 1 of 2 PHOSPHATE COATING, LIGHT WSS-M3P36-A1 PH
2、OSPHATE COATING, HEAVY WSS-M3P36-A2 1. SCOPE These specifications define a phosphate coating applied to automotive components. 2. APPLICATION These specifications were released originally for a coating generally specified for steel parts where good adhesion and intermediate corrosion resistance is r
3、equired. The coating provides a clean, grease-free surface for painting, improves adhesion of the paint film, and inhibits the spread of corrosion when the paint film is broken. Parts phosphated in accordance with WSS-M3P36-A2 may be oiled instead of painted to provide short-term rust protection. 3.
4、 REQUIREMENTS 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 PHYSICAL PROPERTIES 3.2.1 Coating Weight (FLTM AQ 101-01, AQ 101-02, or AQ 101-03) Note: When phosp
5、hate solutions with high Nickel of Manganese contents are in use, the chromic acid test (FLTM AQ 101-01) should be used. 3.2.1.1 Coating weights (dip or spray system), min. A1 All substrates 1.5 g/m A2 All substrates 11.0 g/m 3.2.2 Crystal size, max 25 microns Measurements conducted with 1000 magnif
6、ication SEMs. ENGINEERING MATERIAL SPECIFICATION WSS-M3P36-A1/A2 Copyright 2013, Ford Global Technologies, Inc. Page 2 of 2 3.3 RESISTANCE PROPERTIES Adhesion (bend test) No loss of adhesion at bend (FLTM BI 009-05) 3.4 CORROSION PROTECTION By agreement between Ford and the supplier, parts phosphate
7、d in accordance with this specification may be oiled to provide short-term rust protection during shipment. 3.5 PAINT APPLICATION If the phosphate coating is being utilized as a base for paint then the paint shall be applied immediately following the phosphate application. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 5. SUMMARY OF REVISIONS 2013 01 09 Removed test method from Sec. 3.3
