1、 ENGINEERING MATERIAL SPECIFICATION WSK-M2P155-A Date Action Revisions Ver. 2 2008 09 10 N-STATUS Replaced by WSS-M2P177-B1 G. Weber, FNA 1990 02 01 C01031532 released C E Herriott concurred J Schult Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 3 PAINT PERF
2、ORMANCE, UNDERBODY WSK-M2P155-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the performance requirements of a painted finish for automotive and commercial vehicle underbodies. 2. APPLICATION This specification was released originally to provide a finish where adequate corrosion
3、 protection and chipping resistance is required. It is specified on underneath areas of underbody, fenders, wheelhouses and reinforcing boxes etc., but for the latter only in regard to the salt fog resistance. The following requirements shall be tested on complete light coloured bodies in accordance
4、 with Engineering Drawings released for the respective models. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate stati
5、stical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.2 CONDITIONING All parts shall be aged for 72 h at 23 +/- 2 C or 16 h at 43 +/- 2 C before testing for resistance properties unless otherwise specified. 3.3 SYSTEM COMPONENTS T
6、he quality required is that obtained with best commercial practice to consistently meet the performance requirements of this specification. Major components of the paint system are as follows. 3.3.1 Substrate As specified on the Engineering Drawing. 3.3.2 Cleaning The surface to be coated must be fr
7、ee from oil or alkaline residues, fingerprints, rust, dirt, moisture, and other foreign materials. ENGINEERING MATERIAL SPECIFICATION WSK-M2P155-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 3 3.3.3 Coating Material 3.3.3.1 Pretreatment All parts shall be
8、zinc phosphated to WSK-M3P1-C requirements. 3.3.3.2 Welding Primer Surfaces inaccessible after assembly shall be primed with a Ford Engineering approved air drying or baking welding primer. This paint finish must be capable of electrocoating by the electrocoat process released by Product Engineering
9、 for painting bodies. The substrate for the welding primer does not need to be degreased thoroughly. 3.3.3.3 Electrocoat Ford Engineering approved electrocoat primer as released for the respective model. 3.3.3.4 Primer Surfacer Ford Engineering approved primer surfacer as released for the respective
10、 model. 3.3.4 Underneath areas of floor pan, fenders and wheelhouses. 3.3.4.1 Electrocoated surfaces must be coated with an additional primer coating. 3.3.4.2 When two primers shall be applied, the primers shall differ in colour, and if possible, baked separately. The first primer application to box
11、es of reinforced underbody parts shall be applied by dipping or electrocoating to protect these parts against corrosion. 3.4 FILM PROPERTIES 3.4.1 Film Thickness, 2 Primers, min 45 micrometre (FLTM BI 117-01) Coating must be sufficient to meet all performance requirements of this specification. 3.5
12、RESISTANCE PROPERTIES 3.5.1 Paint Adhesion Grade 0 (FLTM BI 106-01, Method B) No chipping 3.5.2 Chip Resistance, max Rating 1. Max (FLTM BI 107-01) area loss 0.01% 3.5.3 Salt Spray Resistance, min (FLTM BI 103-01) 3.5.3.1 Underneath areas of floor 480 h pan, including fenders, wheelhouses, terminati
13、ng edges and flanges ENGINEERING MATERIAL SPECIFICATION WSK-M2P155-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 3 3.5.3.2 Remaining underbody surfaces 168 h No rust spots, blistering, chipping, peeling, rust creepage or adhesion loss. Edges and flanges sh
14、all meet the same requirements as other visible surfaces. 3.5.4 Finished Parts When it is not feasible to test the actual part or complete underbody parts, test panels may be substituted. Test panels shall be processed under production conditions, analogous to actual parts. All parts and panels shal
15、l be aged 16 h at 45 +/-2 C or 72 h at 23 +/- 2 C prior to testing. 3.6 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respe
16、ct to these properties shall be clearly designated on the Engineering drawing. 3.7 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties,
17、 composition, construction, color, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Enginee
18、ring activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by thi
19、s document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4. APPROVAL OF MATERIALS This specification is intended to define the performance and/or properties
20、 of finished parts or systems of combined materials. An Engineering Material Approved Source listing is not applicable for this specification. Product Engineering materials referenced in this document and/or the affected engineering drawing which require prior Engineering approval, are shown in the Engineering Material Approved Source List under the specification cited.
