1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 29 Revised Para 3.0 inserted; Para 3.4 & 4 deleted 1978 11 28 Metricated & Retyped CE3H-RD782440-E 1963 10 22 Released E7-2851 Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 1 PHOSPHATE COATING
2、, ZINC-MICRO-CRYSTALLINE ESE-M3P13-A 1 SCOPE This specification defines a micro-crystalline zinc phosphate coating. 2. APPLICATION This specification was released originally for a phosphate coating used to hold lubricants especially for break-in periods on engine parts to reduce wear on moving parts
3、 and for mild corrosion resistance. 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). 3.1 FILM THICKNESS 0.00003-0.0001 in (0.8-3 m) or as specified on
4、 engineering drawing The film characteristics are controlled by pre-cleaning, type of metal, by time in, temperature of, and concentration of solution. 3.2 FINISH The coating shall be uniform throughout and must have a similar crystalline structure to that of the original approved sample. 3.3 RUST P
5、ROTECTION After phosphate coating, parts may be protected from corrosion by use of one of the following: 3.3.1 For In-process Storage Protection: The following material has proven adequate for in-process storage protection. 3.3.1.1 One to three days: ESE-M7C32-A or equivalent. 3.3.1.2 Three days to
6、six months: ESE-M2C36-A or equivalent. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 APPROVED PROCESS Process Standard PL-53-16 (E), or by an equivalent method approved by Manufacturing Engineering and concurred by the affected product engineering office. 5.2 Method of determining coating thickness to be developed by Manufacturing engineering.
