1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2017 07 28 Revised See Summary of Revisions L. Click, FNA 2011 08 03 Activated Replaces WSD-M1P85-A1/2/3 G. Weber, FNA Controlled document at www.MATS Copyright 2017, Ford Global Technologies, LLC Page 1 of 6 PLATING, ELECTROLYTIC ZINC
2、, 5 MICROMETERS, THIN FILM PASSIVATE WSS-M1P85-B1 PLATING, ELECTROLYTIC ZINC, 8 MICROMETERS, THIN FILM PASSIVATE WSS-M1P85-B2 PLATING, ELECTROLYTIC ZINC, 8 MICROMETERS, THICK FILM PASSIVATE WSS-M1P85-B3 PLATING, ELECTROLYTIC ZINC, 8 MICROMETERS, THIN FILM PASSIVATE, WSS-M1P85-B4 SEALANT PLATING, ELE
3、CTROLYTIC ZINC, 8 MICROMETERS, THICK FILM PASSIVATE, WSS-M1P85-B5 SEALANT 1. SCOPE These specifications define performance requirements for passivated, electrolytically plated zinc coatings on ferrous parts (stampings, forgings, castings, etc.), some of which additionally have a topcoat sealant as w
4、ell as threaded fasteners where friction control is not required. 2. APPLICATION These specifications were originally released to define performance requirements for electrolytically plated zinc coatings where corrosion protection and/or decorative appearance of ferrous surfaces is required. Parts m
5、ay be rack or barrel plated, and the plating bath chemistry (acid or alkaline) should be chosen for best performance in the application. A passivation treatment, either trivalent chromium or chromium-free, shall be applied to zinc plated parts to retard the formation of white corrosion products. A t
6、hin film passivate will preserve the silver color of the plating or impart a slight blue tint. Thick film passivates give the plating an iridescent or colored appearance. Sealers are applied to extend the corrosion protection of the plated part. Sealers can be organically or inorganically based, or
7、a mixture of organic and inorganic components. Inorganic sealers will generally resist heat and degradation due to automotive fluids better than organic sealers. WSS-M1P85-B1 is suitable for use on body in white fasteners and WSS-M1P85-B2 is suitable for non-visible interior parts; both are suitable
8、 for parts painted after plating. The passivate prevents white corrosion products from forming during transport from the plating facility to the painting facility. The passivate may not be needed if the parts are painted within a few hours of electroplating. WSS-M1P85-B3 are suitable for non-visible
9、 interior parts. WSS-M1P85-B4 and B5 are suitable for non-visible exterior or non-visible underhood parts. Organic sealer is recommended for use at service temperatures of 150 C maximum. Inorganic sealer is suitable for applications where exposure to heat or incidental exposure to automotive fluids
10、is anticipated, and are recommended for use at service temperatures of 250 C maximum. ENGINEERING MATERIAL SPECIFICATION WSS-M1P85-B1/B5 Copyright 2017, Ford Global Technologies, LLC Page 2 of 6 2.1. LIMITATIONS Only WSS-M1P85-B1 or B2 should be used for parts that will subsequently be painted. Not
11、all passivates can be successfully painted, so part trials must be performed to verify adhesion of the paint to passivate. Paint lines with strong alkaline cleaners may remove the passivate which is acceptable if a pretreatment such as zinc phosphate is applied prior to paint. Sealers typically prev
12、ent paint from bonding to the surface. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification is performance based and does not have approved sources. 3.2 THICKNESS (ASTM B659 / ASTM B568 / ASTM B487) WSS-M1P85-B1 5 m min WSS-M1P85-B2/B3/B4/B5 8 m min The minimum thickness applies to all significan
13、t surfaces as defined in section 4.1 unless otherwise specified on the Engineering Drawing. A maximum plating thickness should be stated on the Engineering Drawing if thick deposits will negatively impact tolerances, functional requirements, assembly, or appearance. In case of dispute, the thickness
14、 measurement umpire method shall be metallographic sectioning per ASTM B487. The passivate and sealant layers are not subject to measurement, but shall be sufficient to meet the Appearance and Laboratory Accelerated Corrosion Test requirements. 3.3 APPEARANCE WSS-M1P85-B1, -B2 and -B4: Parts natural
15、ly have a silver or silver-blue appearance. When dyes are used to produce other colors, the color shall be stated on the Engineering Drawing. WSS-M1P85-B3 and -B5: Parts naturally show a slight iridescence. When dyes are used to produce other colors, the color shall be stated on the Engineering Draw
16、ing. 3.4 PLATING ADHESION (ASTM B571) The coating shall withstand normal handling, storage, and installation without flaking or peeling or other loss of adhesion. Electroplate adhesion to the base metal shall conform to the requirements of one of the following test methods per ASTM B571 unless other
17、wise indicated on the Engineering Drawing. 3.4.1 Grind-Saw Test No lifting or peeling of the electroplate from the substrate is permitted following the grind-saw test. 3.4.2 Burnishing Test No blistering, lifting, or peeling of the electroplate from the substrate is permitted following the burnishin
18、g test. ENGINEERING MATERIAL SPECIFICATION WSS-M1P85-B1/B5 Copyright 2017, Ford Global Technologies, LLC Page 3 of 6 3.5 LABORATORY ACCELERATED CYCLIC CORROSION TESTING (CETP 00.00-L-467) Non-Ferrous Corrosion Ferrous Corrosion WSS-M1P85-B1 0 Weeks 1 Week WSS-M1P85-B2 & B3 0 Weeks 2 Weeks WSS-M1P85-
19、B4 & B5 1 Weeks 3 Weeks Testing shall be done on coated parts whenever possible (not panels). Parts for testing shall have no visible non-ferrous corrosion products at the beginning of testing. Part orientation during testing should mimic components in-vehicle conditions including spray direction, s
20、olution pooling, and attachment of mating components when possible. Failure is constituted by evidence of corrosion products on significant surfaces or rundown of corrosion products onto significant surfaces, at the specified test interval. Evaluation shall be done without magnification at a normal
21、reading distance. Parts that are subsequently painted should be tested to the requirements for the paint. Corrosion testing in the ”as plated” state is not required when the part is subsequently painted. 3.5.1 Potential Assembly Damage Assembly of components onto a vehicle can result in damage to th
22、e coating. Where possible, assembly damage should be simulated prior to the start of corrosion testing. Consult Ford Product or Materials Engineering for guidance. 3.5.2 Exceptions Depending upon the location of the part on a vehicle, exceptions to this requirement may apply for specific application
23、s. Any exceptions are listed in Global Engineering Standard for Total Vehicle Corrosion Resistance, 18-0040 (RQT-001101-002492), and illustrated in the appended photo evaluation guide. Consult Ford Product or Materials Engineering for guidance. 3.6 SEALERS (WSS-M1P85-B4 & -B5 ONLY) When a sealer is
24、applied to the passivated zinc electroplate, the type of sealer (organic, inorganic or mixed organic-inorganic) shall be stated on the Engineering Drawing along with the appropriate specification. The sealant supplier name and product name should be included if known. Example: Electroplated Zinc per
25、 WSS-M1P85-B4, Plating Co. Ultrasealer 101 3.7 EMBRITTLEMENT Parts plated to this specification shall be free from the detrimental effects of hydrogen embrittlement or other factors which result in part brittleness. All parts shall meet the requirements of WSS-M99A3-A. ENGINEERING MATERIAL SPECIFICA
26、TION WSS-M1P85-B1/B5 Copyright 2017, Ford Global Technologies, LLC Page 4 of 6 4. GENERAL INFORMATION This information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.
27、1 SIGNIFICANT SURFACES Significant surfaces should be noted on the Engineering Drawing. If not noted there, significant surfaces are generically defined as those surfaces of the finished part that: Are directly visible when the finished part is assembled in position. Can be a source of corrosion pro
28、ducts directly visible, visible by reflection, or visible when they run down the part or onto other parts. Can affect fit or function of the part. Note: Small areas of ferrous corrosion may be allowed on sharp edges, corners, and recesses due to reduced coverage of the electroplating. Recesses are g
29、enerally defined as areas unreachable by a 13 mm (0.5 inch) diameter sphere. 4.2 PROCESS CONTROL ITEMS 4.2.1 Neutral Salt Spray Corrosion Testing (ASTM B117) Neutral salt spray (NSS) testing is not acceptable in showing initial conformance to this specification. However, NSS testing is often used as
30、 a process control tool by plating applicators, and as such shall form part of the Control Plan. Non-Ferrous Corrosion Ferrous Corrosion WSS-M1P85-B1 24 hours 72 hours WSS-M1P85-B2 & B3 48 hours 96 hours WSS-M1P85-B4 & B5 96 hours 360 hours 4.2.2 Plating Adhesion Heat Quench Test Heat quench testing
31、 may be used for process control but not for initial qualification to this standard. Heat plated parts to 220 +/- 5C for 30 +/- 5 minutes, then quench in room temperature water. No blistering or peeling of the electroplate from the substrate is permitted. 4.3 WORLDWIDE FASTENER FINISHES When used fo
32、r Worldwide Standard Parts, the Worldwide Fastener Finish suffix for WSS-M1P85-B1 is S434. 4.4 RECOMMENDED TESTING REQUIREMENTS FOR DESIGN VALIDATION, PRODUCTION VALIDATION, AND SREA. Coating performance is a function of material selection, surface preparation, and coating application. For establish
33、ed coatings and coating lines, this may permit a reduced test schedule to validate compliance to this specification. Use Table 1 below to determine the recommend test plan depending on the situation. This specification cannot prove out parts or coatings that involve changes in vehicle environment su
34、ch as increased stone chipping or increased temperature. These changes may require vehicle testing, consult SDS/ARL requirements. ENGINEERING MATERIAL SPECIFICATION WSS-M1P85-B1/B5 Copyright 2017, Ford Global Technologies, LLC Page 5 of 6 4.5 SUPPLIERS ONGOING RESPONSIBILITY All materials must be eq
35、uivalent in all characteristics to the material upon which approval was originally granted. Prior to making any changes to the material originally approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplie
36、r Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a completed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the spec
37、ifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.6 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by t
38、his document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. TABLE 1 RECOMMENDED TESTING REQUIREMENTS Ne
39、w Plating System Established Plating System All Applicators New Applicator (No Ford History) Existing Applicator (Plating other Ford Parts) Test Requirement All Parts Existing Part New Part for a Different Application Switching Known Systems on Existing Part New Part/Same System Process Change Examp
40、le A Example B Example C Example D Example E Example F 3.1 Thickness X X X X X Contact Materials Engineering 3.3 Adhesion X X X X X 3.4 Laboratory Accelerated Cyclic Corrosion X X X1 X1 X1 1 Prior testing on similar parts (parts with the same chemistry or applicator) may be acceptable as surrogate d
41、ata, as determined by Materials Engineering. Example A: A new plating system is developed by a finish supplier for automotive applications. Example B: Applicator goes out of business. New applicator uses the same plating system, but it has never plated parts for Ford. Example C: Applicator is asked
42、to plate parts for a different Tier 1 part supplier. Example D: Tier 1 part supplier changes among plating systems. Both systems are widely used at Ford. Example E: Applicator is plating the first run of PPAP parts for new model program on the plating line that supports current model. ENGINEERING MA
43、TERIAL SPECIFICATION WSS-M1P85-B1/B5 Copyright 2017, Ford Global Technologies, LLC Page 6 of 6 Example F: The level of testing is highly dependant on what is changing. Contact Fastener and/or Materials Engineering. 5. SUMMARY OF REVISIONS 2017 07 28 Requirements renumbered. Modify verbiage of Applic
44、ation section. Add Limitation section Remove maximum plating thickness requirement. Move Process Control Item (Plating Adhesion Heat Quench Test) from Requirements to General Information. Clarify Laboratory Accelerated Cyclic Corrosion requirements. Update Sealant callout information. Clarify description of surrogate data.
