1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 01 2014 06 10 Revised See Summary of Revisions C. Mracna, NA 2012 02 16 Activated C. Mracna, NA Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 2 PAINT PERFORMANCE, STEEL WHEEL WEIGHTS WSS-M2P142-B
2、 1. SCOPE This specification defines the performance requirements for coating over steel substrates exposed to severe exterior service conditions. 2. APPLICATION This specification was released originally for coated and/or encapsulated wheel balance weights. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS
3、 FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 COATING Shall be a continuous film free or blisters, bubbles, foreign material, and similar imperfections. 3.3 INITIAL HARDNESS Production
4、 parts shall be sufficiently cured at time of packing to withstand normal handling without marring. 3.4 CYCLIC CORROSION RESISTANCE 4 weeks (Laboratory Accelerated Cyclic Corrosion Test CETP 00.00-L-467) At test termination, wheel weight must have an acceptable as-installed appearance based on a jur
5、y evaluation of at least two people, one person from Ford Wheels Engineering, and the other from either Ford Wheels or Materials Engineering. 3.5 PAINT ADHESION 5% max removal (FLTM BI 106-01, Method C) Lightly hand sand paint film surface (10 double rubs, moderate pressure) with P600 paper until du
6、ll, before scribe operation and checking adhesion. 3.6 THERMAL SHOCK TEST 19 Rating (FLTM BI 107-05) 3.7 WATER RESISTANCE 240 h (FLTM BI 104-01) No blistering, no gloss change (FLTM BI 110-01, 25% max), no loss of adhesion, and/or any other coating failure. Adhesion shall be tested within 20 minutes
7、 after removal from water per paragraph 3.5. ENGINEERING MATERIAL SPECIFICATION WSS-M2P142-B Copyright 2014, Ford Global Technologies, Inc. Page 2 of 2 3.8 FLUID SPOTTING RESISTANCE Rating 4 - 5 (FLTM BI 168-01, Body & Exterior Trim, No loss of adhesion Methods A and B, AATCC Evaluation Procedure 1/
8、ISO 105-A02. Perform adhesion testing per paragraph 3.5.) 3.8.1 Gasoline Resistance 3.8.2 Diesel Fuel Resistance 3.8.3 Brake Fluid (DOT 3 or DOT 4) 3.8.4 Wheel Cleaner Resistance (Motorcraft wheel cleaner - P/N ZC-37) 4. GENERAL INFORMATION This information given below is provided for clarification
9、and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 5. SUMMARY OF REVISIONS 2014 06 10 Changed Paint Adhesion Requirement from “No Loss of Adhesion” to “5% max removal”. Changed Thermal Shock Test Requirement from Rating 20 to Rating 19.
