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    FORD WSS-M2P177-B2-2011 PAINT PERFORMANCE CHASSIS MODERATE VISIBILITY 20 CYCLE RESISTANCE TO BE USED WITH FORD WSS-M99P1111-A (Shown on WSS-M2P177-B1).pdf

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    FORD WSS-M2P177-B2-2011 PAINT PERFORMANCE CHASSIS MODERATE VISIBILITY 20 CYCLE RESISTANCE TO BE USED WITH FORD WSS-M99P1111-A (Shown on WSS-M2P177-B1).pdf

    1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2011 04 20 N Status Replaced by WSS-M2P177-C1/C2/C3 C. Mracna, NA 2006 03 07 Activated A. Wedepohl Printed copies are uncontrolled Copyright 2011, Ford Global Technologies, LLC Page 1 of 3 PAINT PERFORMANCE, CHASSIS, MODERATE VISIBILIT

    2、Y, WSS-M2P177-B1 10 CYCLE RESISTANCE PAINT PERFORMANCE, CHASSIS, MODERATE VISIBILITY, WSS-M2P177-B2 20 CYCLE RESISTANCE NOT TO BE USED FOR NEW DESIGN 1. SCOPE These specifications define the minimum performance requirements for a protective finish for chassis components. These components are general

    3、ly not top coated at the assembly plant. 2. APPLICATION These specifications were originally released for chassis components that do not experience continuous operating temperatures above 121C (250 F) and which receive a minimal amount of direct ultraviolet exposure. Where temperature exceeds 121 C,

    4、 a high temperature paint system should be considered. In applications where prolonged exposure to UV light is expected, epoxy resins should not be used. These specifications are not intended to limit the coating to any specific material or process, but instead define the performance of the system.

    5、3. 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 SUBSTRATE PROPERTIES 3.2.1 Substrate As specified on the Engineering Drawing. Except for Chip Res

    6、istance, all requirements of these specifications must be validated with actual production intent components. 3.2.2 Metal Preparation The surface to be coated must be free from oil, alkaline residues, rust, dirt, moisture and other foreign materials. A preliminary shot blasting or pickling operation

    7、 is required on castings, forgings, and scaled steel. For initial approval, descaled parts must be rated according to ASTM D 2200 method B. The SSPC BSP rating achieved on the design intent parts should appear in the control plan and on the engineering drawing to indicate the level of cleaning. Exam

    8、ple: Descale cleaning level SSPC BSP 10 or better. Electrocoated or powder coated components must be zinc phosphated per WSS-M3P36-A1. The use of iron phosphate is not permitted for electrocoat or powder coat paint processes. ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-B1/B2 Printed copies are unc

    9、ontrolled Copyright 2011, Ford Global Technologies, LLC Page 2 of 3 3.3 FILM PROPERTIES 3.3.1 Color Black or as specified on the engineering drawing. 3.3.2 Initial Hardness The finish shall be sufficiently cured at the time of packing to withstand normal handling and shipping without damage. 3.3.3 P

    10、aint Adhesion Grade 0 (FLTM BI 106-01, Method B) 3.3.4 Thickness, min (FLTM BI 117-01, ASTM B 487) Coating thickness must be sufficient to meet all the performance requirements of these specifications. Minimum coating thickness must be listed on the print and should be based on production intent par

    11、ts. The type of coating shall also be referenced on the print. Exception to the print requirement must be approved by the local Materials Engineering activity. Example: E-coat per WSS-M2P177-B1, 25 m min. 3.4 RESISTANCE PROPERTIES 3.4.1 Chip Resistance, max 4B (SAE J400) Test shall be conducted on p

    12、roduction intent components or on panels. The test panel must have the same substrate i.e. cold rolled/hot rolled steel, cast iron, wrought/cast aluminum and be painted on the same system as the production intent component. or (FLTM BI 157-06) 6 min 3.4.2 Cyclic Corrosion Resistance, min (FLTM BI 12

    13、3-03) WSS-M2P177-B1 10 cycles WSS-M2P177-B2 20 cycles The part must be rated no worse than Grade 6 as defined by ASTM D 610. Parts with sharp edges, recessed areas, rough surfaces, or welds may have reduced corrosion resistance at these locations. Final judgment of corrosion resistance should be bas

    14、ed on visibility of the parts on the vehicle, as observed from the rear or in the wheel wells as described by in Total Vehicle Corrosion Resistance Trustmark requirement. 3.4.3 Water Resistance, min (FLTM BI 104-01, FLTM BI 106-01, Method B) Immerse samples 240 hours. Allow paint film to recover 1 h

    15、 at room temperature after immersion before evaluating. No softening, rust, dulling, color change and/or loss of adhesion. Blistering no greater than size 8, Few per ASTM D 714, is permitted. Adhesion shall be Grade 0. ENGINEERING MATERIAL SPECIFICATION WSS-M2P177-B1/B2 Printed copies are uncontroll

    16、ed Copyright 2011, Ford Global Technologies, LLC Page 3 of 3 3.4.4 Gasoline Resistance (FLTM BI 106-01, Method D) Immerse samples for 1 h at 23 +/- 2 C in commercially available grade of 87 octane, lead free gasoline. Allow paint to recover one hour after immersion before evaluating. The finish shal

    17、l not blister or show more than slight softening or dulling. Adhesion shall be Grade 1 or better. 3.4.5 Ethylene Glycol Resistance (FLTM BI 106-01, Method D) Immerse samples for 1 h at 60 +/- 2 C in a solution of 50% water and 50% commercially available ethylene glycol based coolant. Test report mus

    18、t state coolant used. The finish shall not blister or show more than slight softening or dulling. Adhesion shall be Grade 1 or better. 3.4.6 Hot Oil Resistance (FLTM BI 106-01, Method D) Immerse samples for 1 h at 60 +/- 2 C in commercially available engine oil that meets the latest API-ILSAC requir

    19、ements. The oil must have mineral oil base stocks and the test report should state the oil used. The finish shall not blister or show more than slight softening or dulling. Adhesion shall be Grade 1 or better. 4. GENERAL INFORMATION The information given below is provided for clarification and assis

    20、tance in meeting the requirements of these specifications. 4.1 GLOSS (FLTM BI 110-01) The recommended gloss level for chassis components visible with “wheels on ground“ is 30 to 80 at 60 angle. 4.2 PANEL INFORMATION Test panels for chip resistance are available from ACT Laboratories, Inc. ACT 273 Industrial Drive Hillsdale, MI 49242


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