1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 01 2013 01 29 Revised See Summary of Revisions C. Mracna, NA 2009 01 21 Activated C. Mracna, FNA Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 5 PLATING, CHROMIUM, DECORATIVE EXTERIOR, ALUMINUM W
2、SS-M1P73-C1 1. SCOPE This specification defines performance requirements for exterior chromium plating systems on aluminum substrates. 2. APPLICATION This specification was released originally to define a decorative and/or protective metallic finish for aluminum alloy road wheels. 3. REQUIREMENTS Al
3、l part testing requirements apply to those areas of the part identified as a significant surface per Sec. 4.1 unless otherwise specified on the engineering drawing. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirem
4、ents For Production Materials (WSS-M99P1111-A). 3.2 APPEARANCE 3.2.1 Buffing of Plating Because of the potential adverse effect on corrosion resistance, buffing of final chromium plating on exterior parts is not permitted. Brushing or other approved mechanical treatment on nickel or copper coatings
5、are permitted provided that minimum plating thickness requirements are met after treatment. 3.3 PLATING ADHESION (ASTM B571) Adhesion of the electroplate to the base metal and between layers of plating must conform to the requirements of the following test methods per ASTM B 571 unless otherwise ind
6、icated: 3.3.1 Bend Tests No peeling, flaking, or lift-off of the electroplate from the substrate or between layers of the electroplate is permitted. ENGINEERING MATERIAL SPECIFICATION WSS-M1P73-C1 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 3.3.2 Grind-Saw Test No lifting or peeling of
7、 the electroplate from the substrate or between layers of the electroplate is permitted. 3.3.3 Scribe-Grid Test 9 weeks 2009 01 21 - Completely revised an updated WSB-M1P73-B/B2 o Removed Feasibility section o Removed Pretreatment section o Added Scribe Test (sec. 3.3.) o Changed thermal cycle requirements from 3 to 6 cycles o Revised Accelerated Corrosion Test to new CETP method o Added Secondary Surfaces requirements (sec. 3.10)
