1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver. 4 2008 08 22 Revised replaced by specs WSB-M1P83-B1 replaced by WSS-M1P83-C1, WSB-M1P83-B2-B4 replaced by WSS-M1P83-C2 C. McComb 2006 11 10 N-STATUS WSB-M1P83-B1 and WSB-M1P83-B3 replaced by WSS-M1P83-C1, WSB-M1P83-B2/B4 replaced by WSS-
2、M1P83-C2; C. McComb 1988 04 20 Released SM/ER 3844 TC J. Burke, JAF, MP. NAAO. J. Lines. EAO. Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 6 ELECTROPLATING, BRIGHT OR LOW GLOSS WSB-M1P83-B1 DECORATIVE OVER ABS, PPO OR MINERAL FILLED NYLON - INTERIOR ELECTRO
3、PLATING, BRIGHT OR LOW GLOSS WSB-M1P83-B2 DECORATIVE OVER ABS OR PPO PLASTIC - EXTERIOR ELECTROPLATING, BRIGHT OR LOW GLOSS WSB-M1P83-B3 DECORATIVE OVER MINERAL FILLED NYLON - EXTERIOR ELECTROPLATING, BUFFED DECORATIVE OVER ABS, WSB-M1P83-B4 PPO OR MINERAL FILLED NYLON - EXTERIOR NOT TO BE USED FOR
4、NEW DESIGN 1. SCOPE These specifications define the performance requirements for finished coatings of mechanically or chemically deposited electrical conductor coat and electrodeposited copper, nickel, and chromium for the decoration and protection of acrylonitrile butadiene styrene (ABS), polypheny
5、lene oxide (PPO) or mineral filled nylon parts. 2. APPLICATION These specifications were released originally where a bright or low gloss decorative and/or protective finish is required for exterior parts. Unless otherwise specified on the engineering drawing, all parts shall be finished with a final
6、 coating of chromium. Four levels of performance are defined as follows: WSB-M1P83-B1 Interior part applications. WSB-M1P83-B2 General exterior part applications. WSB-M1P83-B3 Exterior part applications requiring high temperature properties. WSB-M1P83-B4 Buffed exterior part applications requiring h
7、igh temperature properties. CAUTION: Based upon field survey and accelerated laboratory testing experience, plated parts with designs that are not in conformance with the Corporate Plated Part Design Restrictions Booklet (see para 5.1 of this specification) or the grille design guidelines will not b
8、e capable of consistently meeting the requirements of these specifications on a production basis without the use of extraordinary processing techniques, e.g., use of auxiliary anodes, reduction in the parts per rack ratio, etc. FEASIBILITY If the requirements of this specification cannot be met due
9、to part design restrictions, the supplier will inform the responsible product engineering office. ENGINEERING MATERIAL SPECIFICATION WSB-M1P83-B1/B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 6 3. REQUIREMENTS All requirements identified for each specific
10、ation must be met to achieve acceptable field durability. No one requirement, exclusive of others, is capable of insuring satisfactory performance. Any deviations to the requirements of these specifications may be subject to additional performance requirements. All part testing requirements apply to
11、 those areas of the part identified as a significant surface per para 5.2 unless otherwise specified on the engineering drawing. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M
12、99P1111-A). 3.2 APPEARANCE All parts shall have the finish (bright, low gloss or paint overlay) specified on the engineering drawing. The plated parts shall be free from surface imperfections. Low gloss or black parts shall match the approved Styling master sample for appearance. 3.2.1 Buffing of Pl
13、ating Because of the potential adverse effect on corrosion resistance, buffing of final chromium plating on exterior parts is not permitted. Brushing or other approved mechanical treatment on nickel coatings are permitted provided that minimum plating thickness requirements are met after treatment.
14、3.3 PLATING ADHESION (ASTM B 571) Adhesion between layers of electroplate must conform to the following requirements. 3.3.1 Bend Tests (Bend the part or sections of the part) No peeling, flaking, or lift-off of the electroplate from the substrate or between layers of the electroplate is permitted fo
15、llowing the bend tests. 3.3.2 Sawing (The saw blade shall have 16 to 18 teeth/inch) No lifting or peeling of the electroplate from the substrate or between layers of the electroplate is permitted following the grind saw test. 3.4 DUCTILITY (ASTM B 490) Although this is considered a portion of the pr
16、ocess control and not a requirement of part performance, the ductility of the electro-deposit on a finished part is considered acceptable when foils plated in the individual nickel baths meet or exceed the following values: Semi-bright Nickel 80% Bright Nickel 20% ENGINEERING MATERIAL SPECIFICATION
17、WSB-M1P83-B1/B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 6 3.5 PLATING THICKNESS (ASTM B 487, ASTM B 556) It is the suppliers responsibility to identify the plating thickness distribution for each unique part design and rack design by mapping the platin
18、g racks and plated parts and to employ any special processing techniques, e.g., the use of auxiliary anodes and/or shields, reducing the number of parts per rack etc., which may be required to consistently meet the specified minimum plating thicknesses on all significant surfaces. The optical measur
19、ement of copper and nickel deposits on significant surfaces shall be considered the Standard thickness test method (ASTM B 487). The chromium plate thickness on significant surfaces shall be checked by the spot test as described in ASTM B 556 or by the electronic deplating test, ASTM B 504, Determin
20、ation of Thickness of Chromium Plate. In case of dispute, ASTM B 504 shall be the umpire method. The plating thickness requirements identified below represent minimum values in micrometres and apply to all areas of significant surfaces. WSB-M1P83 B1 B2-B3 B4 Application: Interior Exterior Exterior C
21、opper 13 18 18 Semi-bright Nickel (a) - 15 20 Bright Nickel (b) plus 5 6 10 (g) Special nickel (c) or Low gloss Nickel (d) Total Nickel (e) 5 21 30 Microporous Chromium (f) 0.18 0.18 Regular Chromium 0.18 (a) The sulphur content in the semi-bright nickel bath shall be less than 0.005% (weight %). Th
22、e sulphur content is specified to indicate the type of nickel plating solution that is to be used and may be measured per the test procedures identified in ASTM B 456. In-process testing to determine conformance to the sulphur content requirement is essential to establish and maintain process capabi
23、lity and control. (b) The sulphur content in the bright nickel bath shall be greater than 0.04 % (weight %). The sulphur content is specified to indicate the type of nickel plating solution that is to be used and may be measured per the test procedures identified in ASTM B 456. In-process testing to
24、 determine conformance to the sulphur content requirement is essential to establish and maintain process capability and control. (c) If a special nickel is employed to produce discontinuities in the chromium deposit, the thickness of the special nickel shall be added to the measurement of the bright
25、 nickel deposit to meet the combined bright nickel plus special nickel minimum thickness requirement. If a special nickel layer is not used, the minimum thickness requirement applies only to the bright nickel deposit. ENGINEERING MATERIAL SPECIFICATION WSB-M1P83-B1/B4 Printed copies are uncontrolled
26、 Copyright 2008, Ford Global Technologies, LLC Page 4 of 6 (d) Low gloss nickel may be produced by one of the following methods: Co-deposit containing inorganic particles insoluble in the plating bath. Soluble addition agents co-deposited with the nickel. Mechanical treatment of a bright nickel depo
27、sit, e.g., brushing or bead blasting. When low gloss nickel is specified, special nickel need not be applied. (e) The semi-bright nickel thickness shall be greater than or equal to 60% of the total nickel thickness. The bright nickel thickness shall be less than or equal to 40% of the total nickel t
28、hickness. (f) Microporous chromium plating systems acceptable under this specification are defined as those being capable of producing microporosity in conformance with para 3.6. (g) The WSB-M1P83-B4 specification applies to brushed finishes as specified on the Engineering drawing. The indicated thi
29、ckness represents the minimum bright nickel thickness after brushing. 3.6 MICROPOROSITY, min 10,000 pores/cm2 (FLTM BQ 103-06) Note: Applies only to WSB-M1P83-B2, B3 and B4. 3.7 SIMULTANEOUS THICKNESS AND ELECTROCHEMICAL POTENTIAL TEST (S.T.E.P.) (ASTM B 764) Note: Applies only to WSB-M1P83-B2, B3 a
30、nd B4. 3.7.1 The semi-bright nickel layer must be more noble (cathodic) than the bright nickel layer by a minimum of 100 millivolts. 3.7.2 If a microporous top nickel layer is used, it shall be equal to or more noble than the bright nickel layer potential. However, the potential of the microporous n
31、ickel shall not be more than 20 mv noble (cathodic) to the bright nickel layer. 3.8 THERMAL CYCLE - CORROSION TEST (UNRESTRAINED) There shall be no evidence of plating failure on significant surfaces or failure of the plastic due to corrosion after completing three cycles consisting of the following
32、: 3.8.1 Requirements for Testing (WSB-M1P83-B1 only) . 82 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . -30 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . 4 h CASS Test (ASTM B 368) ENGINEERING MATERIAL SPECIFICATION WSB-M1P83-B1/B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page
33、 5 of 6 Parts such as knobs, which are press fitted onto shafts must be tested in assembly. (WSB-M1P83-B2 and B4 over ABS or PPO) . 82 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . -35 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . 16 h CASS Test (ASTM B 368) (WSB-M1P83-B3 and B4 over Mineral Filled Nylon) . 122 +
34、/- 2 C for 0.5 h . 82 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . -35 +/- 2 C for 2 h . 23 +/- 2 C for 1 h . 16 h CASS Test (ASTM B 368) Note: Parts shall be rinsed with demineralized water only, after each CASS test cycle. Scrubbing, abrasive cleaning, or polishing is not permitted. Parts are then exami
35、ned for corrosion defects. 3.8.2 Plating and Corrosion Defects 3.8.2.1 Cracks and Crazing Cracks and crazing of the plate are caused by expansion and/or contraction due to temperature change. Cracks or crazing exceeding 6 mm in length observed on significant surfaces shall be considered failure of t
36、he part. 3.8.2.2 Blistering and Corrosion Blisters defined as “pop-ups“ can be caused by improper molding or plating, or result from corrosion. Failure is noted when: . Any site (hole) larger than 1.5 mm on any significant surface (not including rundown stain) shall be considered failure of the part
37、. . More than 1% blisters (grid method) of the entire significant surface area, including blisters and green corrosion, shall be considered failure of the part. . 8% or more blisters and corrosion in a grid section containing 100, 6.0 x 6.0 mm spaces placed anywhere on the significant surface (local
38、 corrosion) shall be considered failure of the part. ENGINEERING MATERIAL SPECIFICATION WSB-M1P83-B1/B4 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 6 of 6 5. GENERAL INFORMATION: The information given below is provided for clarification and assistance in meetin
39、g the requirements of these specifications. 5.1 SIGNIFICANT SURFACES Unless otherwise specified on the engineering drawing, significant surfaces are defined as those surfaces of the finished part that: . Are directly visible and/or visible by reflection when the finished part is assembled in car pos
40、ition. . Can be the source of corrosion products directly visible or visible by reflection. 5.2 MATERIAL REFERENCE . Plating Grade ABS Plastic ESB-M4D241 . Plating Grade Polyphenylene Oxide ESB-M4D351 (Modified) . Plating Grade Mineral Filled Nylon ESB-M4D429 5.3 SAMPLING AND INSPECTION As specified
41、 in Quality Control Specification Q-101, Appendix D, and consistent with the appropriate engineering specification (ES) as released by the responsible design engineering activity. 5.4 MOLDED PARTS Plastic parts intended for plating by this specification must be molded in keeping within the best comm
42、ercial practice to achieve stress-free parts and ensure good plateability. Molded-in stresses can result in part failure by loss of plating adhesion (blistering) and/or cracking of the plastic and/or plating when subjected to service temperature extremes. Parts must be stress relieved prior to plating and subsequent to plating as required. 5.5 SURFACE FINISH When the low gloss finish is specified for glare reduction surfaces, the specular gloss of the surface shall not exceed the requirement of specification ESB-M25P2-A. Special nickels are not required in the case of low gloss finishes.
