1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 09 29 N-STATUS Replaced by WSS-M2P177-B1/B2 L. Schmalz 2003 08 12 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.7, 3.8, 4 deleted 1996 04 19 Activated T. Horoszy Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC
2、Page 1 of 5 PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, WSS-M2P177-A1 96 h SALT SPRAY RESISTANCE PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, WSS-M2P177-A2 240 h SALT SPRAY RESISTANCE PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, WSS-M2P177-A3 360 h SALT SPRAY RESISTANCE PAINT PERFORMANCE, CHASSI
3、S LOW LEVEL VISIBLE, WSS-M2P177-A4 480 h SALT SPRAY RESISTANCE PAINT PERFORMANCE, CHASSIS LOW LEVEL VISIBLE, WSS-M2P177-A5 GREATER THAN 480 h SALT SPRAY/WATER RESISTANCE PER DRAWING NOT TO BE USED FOR NEW DESIGN 1. SCOPE These specifications define the performance requirements for a protective finis
4、h for chassis and underhood components applied prior to shipment to the assembly plant. 2. APPLICATION These specifications were released originally to be specified on chassis components that are not generally top coated and which receive a minimal amount of direct ultraviolet exposure. In applicati
5、ons where prolonged exposure to UV light is expected, epoxy resins should not be used. The paint system described shall provide uniform coverage, adequate appearance and moderate to severe corrosion protection performance. These specifications are not intended to limit the coating to any specific ma
6、terial or process, but instead define the performance of the system. Unless otherwise noted, all requirements of these specifications must be met with actual production intent components. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 S
7、TANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). ENGINEERING MATERIAL SPECIFICATIONWSS-M2P177-A1/A5 Printed copies are uncontrolled Copyright 2006, Ford Global Technologie
8、s, LLC Page 2 of 5 3.3 SYSTEM COMPONENTS 3.3.1 Substrate As specified on the Engineering Drawing. Whenever a test panel is used to satisfy a requirement in these specifications, the test panel must have the same substrate i.e. cold rolled/hot rolled steel, cast iron, wrought/cast aluminum and be pai
9、nted on the same system as the production intent component. 3.3.2 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 is required on castings, forgings, and scaled ste
10、el. Electrocoated or powder coated components must be zinc phosphated per WSK-M3P1-C. The use of iron phosphate is not permitted for electrocoat or powder coat paint processes. 3.4 FILM PROPERTIES 3.4.1 Color (FLTM BI 109-01) Black or as specified on the engineering drawing. Test shall be conducted
11、on flat test pieces cut from production intent component, or on panels prepared in accordance with para 3.3.1. 3.4.2 Initial Hardness The finish shall be sufficiently cured at the time of packing to withstand normal handling and shipping without damage. 3.4.3 Paint Adhesion Grade 0 (FLTM BI 106-01,
12、Method B) No chipping 3.4.4 Film thickness, min Film thickness must be sufficient to meet all the performance requirements of these specifications. See para 5.1 for target film thickness values. 3.5 RESISTANCE PROPERTIES 3.5.1 Chip Resistance, max 4B (SAE J400) Test shall be conducted on flat test p
13、ieces cut from production intent component, or on panels prepared in accordance with para 3.3.1. or (FLTM BI 157-04) 3 - 4 min ENGINEERING MATERIAL SPECIFICATIONWSS-M2P177-A1/A5 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.5.2 Salt Spray Resistance, min
14、 (FLTM BI 103-01, Scribed) WSS-M2P177-A1 96 h WSS-M2P177-A2 240 h WSS-M2P177-A3 360 h WSS-M2P177-A4 480 h WSS-M2P177-A5 Greater than 480 h Per Engineering Drawing Requirement A - No blistering, chipping, peeling, rust creepage or adhesion loss more than 3 mm from scribe. Test shall be conducted on f
15、lat test pieces cut from production intent component, or on panels prepared in accordance with para 3.3.1. Requirement B - Part after salt spray must be rated no worse than Grade 6 as defined by ASTM D 610 (exclude scribed area). Test shall be performed on components or paras as large as can be hand
16、led by testing equipment 3.5.3 Water Resistance, min (FLTM BI 104-01) Allow paint film to recover 1 h at room temperature after water immersion before evaluating film properties. WSS-M2P177-A1 96 h WSS-M2P177-A2 240 h WSS-M2P177-A3 360 h WSS-M2P177-A4 480 h WSS-M2P177-A5 Greater than 480 h Per Engin
17、eering Drawing No softening, rust, dulling, color change and/or loss of adhesion. Blistering no greater than Few, size 8 (ASTM D 714) is permitted. Adhesion shall be tested according to para 3.4.4 Test shall be performed on components or sections as large as can be handled by testing equipment 3.5.4
18、 Gasoline Resistance The finish shall not blister or show more than slight softening or dulling when subjected to immersion for 1 h at 23 +/- 2 C in commercially available grade of 87 octane lead free gasoline, ethanol blend (Gasohol) or methanol/ gasoline blends. Test shall be conducted on flat tes
19、t pieces cut from production intent component, or on panels prepared in accordance with para 3.3.1. ENGINEERING MATERIAL SPECIFICATIONWSS-M2P177-A1/A5 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 3.5.5 Ethylene Glycol Resistance The finish shall not blist
20、er or show more than slight softening or dulling when subjected to immersion for 1 h at 70 +/- 2 C in a solution of 50% water and 50% factory-fill coolant. Test report must state coolant used. Test shall be conducted on flat test pieces cut from production intent component, or on panels prepared in
21、accordance with para 3.3.1. 3.5.6 Hot Oil Resistance The finish shall not blister, lift or show more than a slight softening or dulling after immersion for 1 h at 65 +/- 2 C in currently used factory-fill crankcase oil (diesel or gasoline powered). Test shall be conducted on flat test pieces cut fro
22、m production intent component, or on panels prepared in accordance with para 3.3.1. 3.5.7 Heat Aging/Resistance (Only Applicable When Specified on the Engineering Drawing) (24 h at 175 +/- 3 C followed by quench in room temperature water) 3.5.7.1 Adhesion (see para 3.4.4) 3.5.7.2 Salt Spray (see par
23、a 3.5.2 - Requirement B) Finish after heat & quench must meet adhesion and salt spray requirements. Test shall be conducted on flat test pieces cut from production intent component, or on panels prepared in accordance with para 3.3.1. 3.5.8 Proving Ground Resistance CETP 00.00-R-311 (P3-76-A) Compon
24、ent shall comply with the WPAS Corporate Corrosion Guidelines of the WCR for appearance, serviceability (if applicable) and function. See appropriate materials engineer for specific requirements on each component. 3.6 SPECIAL REQUIREMENTS 3.6.1 Hydrogen Embrittlement Components finished to these spe
25、cifications must meet the requirements of WSS-M99A3-A. ENGINEERING MATERIAL SPECIFICATIONWSS-M2P177-A1/A5 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeti
26、ng the requirements of these specifications. 5.1 FILM THICKNESS MINIMUM TARGET VALUES (FLTM BI 117-01) Electrocoat 18 m Powder Coat 45 m Spray or Dip Coatings 25 m Plating 6 m 5.2 GLOSS (FLTM BI 110-01) The recommended gloss level for chassis components visible with “wheels on ground“ is 30 to 80 at 60 angle. Test shall be conducted on flat pieces cut from production intent component, or on panels prepared in accordance with Section 3.3.1. 5.3 PANEL INFORMATION Test panels are available from Advanced Coating Technologies Inc. (ACT). ACT P. O. Box 735 Hillsdale, MI 49242
