1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 03 2015 08 27 Revised/ Released See Summary of Revisions S. Ryzyi, NA 2009 08 19 Revised Updated paragraph 3.5.2, added paragraph 5 G. Weber 2004 09 20 Released A1 and A2 Released A3 and A4 2015 A. Cockman, J Luther Controlled document a
2、t www.MATS Copyright 2015, Ford Global Technologies, LLC Page 1 of 6 CORROSION PROTECTIVE COATING, 4 WEEK RESISTANCE, SILVER/SILVER GRAY WSS-M21P45-A1 CORROSION PROTECTIVE COATING, 4 WEEK RESISTANCE, BLACK WSS-M21P45-A2 CORROSION PROTECTIVE COATING, 8 WEEK RESISTANCE, SILVER/SILVER GRAY WSS-M21P45-A
3、3 CORROSION PROTECTIVE COATING, 8 WEEK RESISTANCE, BLACK WSS-M21P45-A4 1. SCOPE The materials defined by these specifications are corrosion protective coatings over steel. These coating systems provide corrosion protection and color options and are intended for spring band hose clamps. These coating
4、s are free of hexavalent chromium, nickel, lead and cadmium. 2. APPLICATION These specifications were released originally for materials used for corrosion protective coatings over steel. They are intended for constant tension spring band hose clamps where a high level of corrosion protection is requ
5、ired. 2.1 SERVICE TEMPERATURE The maximum continuous service temperature resistance is 200 C. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources iden
6、tified on the Ford Approved Source List (ASL) or WX 100 Fastener Standard can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. 3.2 LICENSEE APPLIC
7、ATOR QUALITY REQUIREMENTS Applicators must follow coating manufacturer procedures and recommendations for chemical usage, equipment and processing. 3.3 MATERIAL PERFORMANCE 3.3.1 Raw Material Storage Stability The material must be capable of being stored at 23 +/- 2 C for 60 days without detrimental
8、 effect to the performance of the coated parts. ENGINEERING MATERIAL SPECIFICATION WSS-M21P45-A1/A4 Copyright 2015, Ford Global Technologies, LLC Page 2 of 6 3.3.2 Cleaning Prior to coating, the parts shall be free of oil, scale, and similar foreign materials. The cleaning process shall have no detr
9、imental effect on the substrate, including freedom from embrittlement. 3.3.3 Curing These coatings are typically cured at 200 to 220 C. Alternative cure temperatures may be used provided mechanical properties of the clamp are not affected. Parts must be sufficiently cured at the time of packing to w
10、ithstand normal handling and shipping without marring. 3.3.4 Appearance A1/A3 Uniform silver/silver gray A2/A4 Uniform black The coating shall be uniform in color and free from discontinuities when viewed without magnification. Where part grounding is required to apply the finish the grounding point
11、 shall be on the tang of the clamp and shall not impact clamp performance. 3.3.5 Storage Life Parts supplied shall still meet the specific requirements of this specification 6 months after receipt by Ford when stored at 5 to 28 C with no direct heat or sunlight. 3.4 ADHESION 3.4.1 The cured coating
12、shall withstand normal handling, storage and installation without flaking or peeling or other loss of adhesion. 3.4.2 Parts heated to 120 C for 60 minutes shall not exhibit blistering, peeling, flaking or coating which can be removed by a filament type tape, such as 3M No. 898-2. The testing of coat
13、ing quality by salt spray and/or determination of coating thickness will be performed on parts passing the adhesion test. 3.4.3 Hoseclamps may be used in Pre-Opened, Pre-Positioned (POPP) applications; these are applications where the hoseclamp is glued to the hose to assist assembly. After a 16 hou
14、r soak at a relative humidity of 95% min. the adhesion of the coating shall be sufficient to withstand a load of 34Kg applied to the tangs in a horizontal or radial direction and shall meet the following requirements: 3.4.3.1 There shall be no separation of the coating and substrate. 3.4.3.2 There s
15、hall be no separation between coating layers. ENGINEERING MATERIAL SPECIFICATION WSS-M21P45-A1/A4 Copyright 2015, Ford Global Technologies, LLC Page 3 of 6 3.5 RESISTANCE PROPERTIES PRECONDITIONING Prior to performing the resistance tests, the finished clamps shall undergo the following procedure to
16、 simulate handling and transportation damage: a) Fill a cardboard box full of clamps to be tested. (No larger than 250x250x250) b) Secure the box thoroughly to prevent it from breaking open. c) Slowly slide the box off of a surface 0.75 meters onto the floor. d) Repeat step c 30 times, alternating b
17、etween top, side and bottom of box. 3.5.1 Sodium Hypochlorite Resistance The following procedure is used for new coating approvals or for in-process testing of approved coatings. New coating approvals shall use a minimum sample size of 30 clamps. After coating clamps of sizes Dn41 with the specified
18、 coating, thirty clamps shall be assembled on a PVC plastic mandrel 0.2 to 0.3 mm smaller than the full open diameter. The assembly shall be immersed in 2000 ml +/- 50 ml of 4.95 - 5.05% sodium hypochlorite solution at 21 +/- 3 C, there shall be no evidence of cracking after 72 hours immersion. The
19、Sodium Hypochlorite SCC Test Solution shall be assayed within 72 hours prior to test per the following procedure adapted from US Pharmacopeia*. Weigh accurately, in glass flask 10 g of Sodium Hypochlorite SCC Test Solution, and dilute with 40 ml water. Add 0.4 g potassium iodide and 2 ml 6 N acetic
20、acid, titrate the liberated iodine with 0.010 N sodium thiosulfate, adding 1 ml of starch TS as the endpoint is approached. Note, the solution is dark with a clear endpoint, so a white background is required for an accurate end point determination. Perform a blank determination, and make any necessa
21、ry correction. Each ml of 0.010 N sodium thiosulfate is equivalent to 0.3722 mg of NaOCl. *US Pharmacopeia analysis is for 4 to 6% NaOCl and has been adjusted for this dilute analysis. 3.5.2 Corrosion Resistance (CETP 00.00-L-467) Hoseclamps coated to these specifications shall meet the General Requ
22、irements of WX100. Non-Ferrous Corrosion Ferrous Corrosion WSS-M21P45-A1 1 week 4 weeks WSS-M21P45-A2 1 week 4 weeks WSS-M21P45-A3 1 week 8 weeks WSS-M21P45-A4 1 week 8 weeks Testing shall be done on coated parts whenever possible (not panels). Parts for testing shall have no visible non-ferrous cor
23、rosion products at the beginning of testing. Parts shall be tested in vehicle orientation. Failure is constituted by evidence of corrosion products on surfaces directly visible in the application on the vehicle, or rundown of corrosion products onto directly visible surfaces, at the specified test i
24、nterval. Small areas of ferrous corrosion permitted on the ears from the install tool and on the edge of hoseclamp (see Figure 1). Evaluation shall be done without magnification at a normal reading distance. ENGINEERING MATERIAL SPECIFICATION WSS-M21P45-A1/A4 Copyright 2015, Ford Global Technologies
25、, LLC Page 4 of 6 Figure 1: Acceptable amounts of ferrous corrosion permitted at end of test. 3.5.3 Water Resistance (FLTM BI 104-01) Shall not blister or show any signs of red rust when subjected to immersion in water for 240 hours. 3.5.4 Gasoline Resistance Shall not blister or show any signs of s
26、oftening or dulling when subjected to immersion in current factory fill gasoline for 24 hours at 23 +/- 2 C. 3.5.5 Hot Oil Resistance Shall not blister or show any signs of softening or dulling when subjected to immersion in engine oil (SAE 10W30 per WSS-M2C206-A or equiv.) for 24 hours at 66 +/- 3
27、C. 3.5.6 Ethylene Glycol Resistance Shall not blister or show any signs of softening or dulling when subjected to immersion in a 50% solution of water and long life coolant concentrate (WSS-M97B44-D or equivalent) for 24 hours at 23 +/- 2 C. 3.5.7 Brake Fluid Resistance Shall not blister or show any
28、 signs of softening or dulling when subjected to immersion in currently approved brake fluid for 24 hours at 23 +/- 2 C. 3.5.8 Power Steering/Transmission Fluid Shall not blister or show any signs of softening or dulling when subjected to immersion in current factory fill power steering and transmis
29、sion fluid for 24 hours at 66 +/- 3 C. 3.6 COATING THICKNESS Because of the intended use on Constant Tension Spring Band Hoseclamps the coating thickness is not a significant requirement. However the coating thickness shall not inhibit other performance requirements of this specification or the inst
30、allation or function of the hoseclamp. ENGINEERING MATERIAL SPECIFICATION WSS-M21P45-A1/A4 Copyright 2015, Ford Global Technologies, LLC Page 5 of 6 3.7 FINISH FRICTION Finishes to these specifications shall meet the Torque/Clamping Force Performance Requirements of WZ 101 (Test Program B). Note: Wh
31、ile WZ 101 is specifically for threaded fasteners, finish friction is important to the functional performance of hoseclamps to prevent hose bunching under the clamp. The coefficient of total friction (tot) of the top coat(s) shall not exceed 0.18. 4. GENERAL INFORMATION The information given below i
32、s provided for clarification and assistance in meeting the requirements of these specifications. Contact for questions concerning Engineering Material Specifications. 4.1 CORROSION RESISTANCE (SAE/USCAR-1) Hose clamps tested and evaluated in accordance with SAE/USCAR-1, typically pass a minimum req
33、uirement listed in the table below. Non-Ferrous Corrosion Ferrous Corrosion WSS-M21P45-A1 120 h 480 h WSS-M21P45-A2 120 h 480 h WSS-M21P45-A3 120 h 1000 h WSS-M21P45-A4 120 h 1000 h 4.2 WORLDWIDE FASTENER FINISHES When used for Worldwide Standard Parts, the Worldwide Fastener Finish Suffix as define
34、d in Worldwide Fastener Standard WX100 shall be specified as shown below: WSS-M21P45-A1 S444 WSS-M21P45-A2 S445 WSS-M21P45-A3 S444H WSS-M21P45-A4 S445H 4.3 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Pro
35、duct Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of the Material Specification. Tested material s
36、amples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.4 SUPPLIERS ONGOING RESPONSIBILITY All m
37、aterials must be equivalent 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 t
38、he affected Supplier 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. ENGINEERING MATERIAL SPECIFICATION WSS-M21P45-A1/A4 Copyright 2015, Ford Global Tech
39、nologies, LLC Page 6 of 6 For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Job 1. 4.5 RESTRICTED SUBSTAN
40、CE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility t
41、o comply with this standard on a continuing basis through IMDS and or GMAP reporting. 5. SUMMARY OF REVISIONS 2015 08 27 Released A3 and A4 suffix levels Updated Sodium Hypochlorite Resistance, test 3.5.1 from 28 to 72 h. Changed paragraph 3.5.2 from CETP 00.00-R343 to CETP 00.00-L-467 Added Figure
42、1 to section 3.5.2 Added section 4.2 Add A3 and A4 to section 4.1 Removed WSS-M99P1111-A and add requirements to para 3.1, and 4.3, 4.4, 4.5. 2009 08 19 Changed paragraph 3.5.2 corrosion test method from FLTM BI 123-01 to CETP 00.00-R343 Changed paragraph 3.5.2 corrosion test requirement Added paragraph 5 2006 09 13 Paragraph 3.4.3 added 16 h soak
