1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2007 12 18 Revised Updated Format; No Technical Change 2003 06 10 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.10, 3.11 and 4 deleted 1998 11 17 Activated D. Green Printed copies are uncontrolled Copyright 2007, Ford Global Technologies,
2、LLC Page 1 of 4 ENAMEL, AIR DRY CHASSIS WSS-M1J217-A1 ENAMEL, AIR DRY CHASSIS WSS-M1J217-A2 1. SCOPE The materials defined by these specifications are air drying enamels suitable for application over chassis and transmission components such as gearbox housings, rear axle assemblies, drive shafts and
3、 suspension units. 2. APPLICATION These specifications were originally released to describe black or suitably colored air drying enamels, for use as one-coat finishes over ferrous substrates, or on previously primed surfaces. The coatings specified should be suitable for pneumatic, electrostatic, an
4、d airless spray application. 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). 3.4 COMPOSITION 3.4.1 Vehicle The resin shall be based on a suitable syn
5、thetic system to obtain the desired application and resistance properties. 3.4.2 Pigment The pigment shall be balanced and blended to give the desired color, normally black, unless specified on the component drawing. 3.4.3 Solvent Solvents should be balanced in order to provide suitable storage and
6、application viscositys, whilst at the same time avoiding flocculation and maintaining correct solvent emission levels. ENGINEERING MATERIAL SPECIFICATION WSS-M1J217-A1/A2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 2 of 4 3.4.4 Specific Composition When it is n
7、ecessary to obtain specific data regarding material formulation, it is understood that the supplier will furnish such data on request. It may be necessary to supply such information in order to clarify the toxicological status of the material with respect to National or Local Protection Agency const
8、rictions. 3.5 PHYSICAL PROPERTIES 3.5.1 Non-Volatile Initial Sample +/- 1.00% (FLTM BI 102-01) 3.5.2 Density Initial Sample +/- 0.05 g/mL (ASTM D 1475) 3.5.3 Viscosity As Initial Sample +/- 5 s FC-4/25 C Received (FLTM BI 111-01) 3.5.4 Viscosity As Used As Recommended by Supplier (FLTM BI 111-01) 3.
9、5.5 Shelf Stability No excessive change in (Storage Stability) viscosity and no noticeable (FLTM BI 102-03) hard settling 3.5.6 Flash Point (ASTM D 56) The flash point shall conform to the safety regulations applicable to the plant and/or country where the material is used. 3.5.7 Solvent Emissions T
10、he volatile portion of this material shall meet the applicable requirements of the local air pollution control for the assembly plants in which the coating is used. 3.6 PREPARATION OF TEST PANELS (FLTM BI 103-02) 3.6.1 Substrate Ford Engineering Approved Standard Body Steel, or Steel used in the man
11、ufacture of the associated Chassis component. In the absence of the appropriate Steel, Ford Standard Paint Test Panels may be used, UMA 18001 or UMA 18006. ENGINEERING MATERIAL SPECIFICATION WSS-M1J217-A1/A2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 3 of 4 3.
12、6.2 Cleaning Remove all surface oil, grease, and dust with a suitable solvent as described in FLTM BI 103-02, Method F. 3.7 APPEARANCE 3.7.1 General Appearance Coating should provide sufficient coverage to obscure any minor surface defects effecting the overall appearance. 3.7.2 Color (FLTM BI 109-0
13、1) Black unless stated otherwise on Engineering Drawing. Color should match Approved Master Appearance color panel. 3.7.3 Gloss (FLTM BI 110-01, 60 glossmeter) Gloss shall match the Master Appearance color panel. 3.8 FILM PROPERTIES 3.8.1 Film Thickness, min 25 micrometers (FLTM BI 117-01) Coating f
14、ilm thickness must be sufficient to meet all of the performance requirements of this specification. 3.8.2 Dry Hiding Power, max. 20 micrometers (FLTM BI 158-01) 3.8.2.1 Hiding Power, max 12 (FLTM BI 101-01, Cryptometer Method 0.002 wedge 22 s Ford 4 cup at 25 C) 3.8.3 Drying Tack-free at normal room
15、 temperature, 25 +/- 1 C. 45 - 65% RH, within the following limits: WSS-M1J217-A1 10 minutes WSS-M1J217-A2 15 minutes ENGINEERING MATERIAL SPECIFICATION WSS-M1J217-A1/A2 Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 4 of 4 3.9 RESISTANCE PROPERTIES 3.9.1 Adhesion
16、 Grade 0 (FLTM BI 106-01, Method B) No chipping 3.9.2 Water Immersion (FLTM BI 104-01) WSS-M1J217-A1 24 H WSS-M1J217-A2 48 H No blistering, softening, or adhesion loss. 3.9.3 Salt Spray Exposure (FLTM BI 103-01) WSS-M1J217-A1 24 h WSS-M1J217-A2 48 h No rust spots, blistering, chipping, peeling, or a
17、dhesion loss more than 3 mm from scratches, scar marks, sharp edges or scribe lines. 3.9.4 Fuel Resistance (FLTM BI 152-01) Petrol Resistance Current initial fill gasoline, National Standards Premium Grade Diesel Resistance Current initial fill diesel, National Standard Premium Grade Resistance Test should be carried out using the Local or National Fuel which is predominantly used in the area where the chassis component is scheduled for general usage.
