1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 2 2014 11 05 N Status Replaced with WSS-M1P83-E1 S. Draheim, NA 2011 09 19 Revised Updated reference in 4.1 M. Gramlich, NA 2010 06 30 Activated Replaces WSS-M1P83-C1 M. Gramlich, NA Controlled document at www.MATS Copyright 2014, Ford G
2、lobal Technologies, LLC Page 1 of 5 ELECTROPLATING, BRIGHT OR LOW GLOSS DECORATIVE FINISH WSS-M1P83-D1 OVER ABS, PC/ABS OR NYLON FILLED INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the performance requirements for finished coatings of mechanically or chemically deposite
3、d electrical conductor coat and electrodeposited copper, nickel, and chromium for the decoration and protection of acrylonitrile butadiene styrene (ABS) or polycarbonate/acrylonitrile butadiene styrene (PC/ABS) or filled nylon (PA) parts. 2. APPLICATION This specification was released originally whe
4、re a bright or low gloss decorative and/or protective finish is required for interior parts. Unless otherwise specified on the engineering drawing, all parts shall be finished with a final coating of chromium. 3. REQUIREMENTS All requirements identified for each specification must be met to achieve
5、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 those areas of the part iden
6、tified as a significant surface (per paragraph 4.3) unless otherwise specified on the engineering drawing. Testing to be done a minimum of 72 hours after plating. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requiremen
7、ts For Production Materials (WSS-M99P1111-A). 3.2 FINISHED PARTS Testing must be done on actual production parts or a section of the part whenever possible. Where part dimensions limit equipment access, representative panels or plaques may be substituted for production parts with approval from respo
8、nsible Design Engineer. Testing to be conducted at Design Verification (DV) or Process Validation (PV) per Table 1, Section 4.5, unless otherwise agreed to by responsible Design Engineer. 3.3 APPEARANCE The plated parts shall be free from surface imperfections. Parts shall match the approved Styling
9、 Master sample for appearance from Color & Trim and the Approved Boundary Sample. ENGINEERING PERFORMANCE SPECIFICATION WSS-M1P83-D1 Copyright 2014, Ford Global Technologies, LLC Page 2 of 5 3.4 PLATING ADHESION 3.4.1 Grind-Saw (The saw blade shall have 16 to 18 teeth/inch.) (ASTM B 571) No peeling,
10、 flaking, or lifting of the electroplate from the substrate. 3.4.2 Bend Test (ASTM B 571) No peeling, flaking, or lifting of the electroplate from the substrate. 3.4.3 Scribe-Grid Test 5% plating removal (ASTM B 571) Use the following modifications to the method: Lightly hand sand plated surface (10
11、 double rubs, moderate pressure) with P600 paper until dull. Clean area with Isopropyl Alcohol. With a hardened steel, 30 tip blade, scribe eight lines in a rectangular grid in 0.5 cm increments. Use 3M No. 898 pressure sensitive tape. 3.4.4 Thermal Shock (FLTM BI 107-05) No peeling, flaking, or lif
12、ting of the electroplate from the substrate. 3.5 PLATING THICKNESS (ASTM B 487, ASTM B 504, ASTM B 568) It is the suppliers responsibility to identify the plating thickness distribution for each unique part design and rack design by mapping the plating racks and plated parts. Areas of low and high c
13、urrent density are to be documented on a part map indicating locations that plating measurements will be taken. Plating thickness to be determined by Microscopic Examination (ASTM B 487), Coulometric Method (ASTM B 504), or X-Ray Spectrometry (ASTM B 568). Exceptions to the minimum plating thickness
14、 are to be shown as a detail on the part drawing by indicating in an appropriate view the area(s) with deviated thickness(es) allowed. These exceptions must meet all other requirements of the specification and the areas of deviated thickness must be approved by the responsible Design Engineer. The p
15、lating thickness requirements identified below represent minimum values in micrometers and apply to all areas of significant surfaces (as per paragraph 4.3). Copper 13 Semi-bright Nickel - Bright Nickel plus 5 Special nickel or Low gloss Nickel Total Nickel 5 Microporous Chromium Regular Chromium 0.
16、18 ENGINEERING PERFORMANCE SPECIFICATION WSS-M1P83-D1 Copyright 2014, Ford Global Technologies, LLC Page 3 of 5 3.6 THERMAL CYCLE - CORROSION TEST There shall be no evidence of plating failure on significant surfaces (per paragraph 4.3) or failure of the plastic due to corrosion after completing fou
17、r cycles consisting of the following: 3.6.1 Requirements for Testing 90 +/- 2 C for 2 h 23 +/- 2 C for 1 h and 50 +/- 5% relative humidity -30 +/- 2 C for 2 h 23 +/- 2 C for 1 h and 50 +/- 5% relative humidity 4 h CASS Test (ASTM B 368) Note: Parts shall be rinsed with demineralized water only, afte
18、r each CASS test cycle. Scrubbing, abrasive cleaning, or polishing is not permitted. Parts are then examined for corrosion defects per paragraph 3.6.2. The cycled part shall show no evidence of warpage, deformation, cracks, delamination or other failures to an extent that would affect its use in the
19、 ultimate assembly. 3.6.2 Plating and Corrosion Defects 3.6.2.1 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 (per paragraph 4.3) shall be considered
20、 failure of the part. 3.6.2.2 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 (per paragraph 4.3) (not including rundown stain) shall be
21、 considered failure of the part. More than 1% of part surface area with blisters and/or corrosion on significant surfaces (per paragraph 4.3) shall be considered failure of the part. More than 8% of part surface area with blisters and/or corrosion in a grid section containing 100, 6.0 x 6.0 mm space
22、s placed anywhere on the significant surfaces (per paragraph 4.3) shall be considered failure of the part. ENGINEERING PERFORMANCE SPECIFICATION WSS-M1P83-D1 Copyright 2014, Ford Global Technologies, LLC Page 4 of 5 4. GENERAL INFORMATION The information given below is provided for clarification and
23、 assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 MATERIAL REFERENCE The following stress free plateable grade substrates are recommended: ABS WSS-M4D836-A PC/ABS WSS-M4D813-A Plating Grade Mineral Filled Nylon W
24、SK-M4D667-A 4.2 MOLDED PARTS Plastic parts intended for plating by this specification must be molded in keeping within the best commercial practice to achieve stress-free parts and ensure good plating. Molded-in stresses can result in part failure by loss of plating adhesion, blistering, and/or crac
25、king of the plastic and/or plating when subjected to service temperature extremes. 4.3 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 th
26、e finished part is assembled in car position. - Can be the source of corrosion products directly visible or visible by reflection. 4.4 DUCTILITY (ASTM B 490) Although this is considered a portion of the process control and not a requirement of part performance, the ductility percentage of Semi-brigh
27、t Nickel and Bright Nickel on foils plated in the individual nickel baths should be rated, reported, and included in the Control Plan. 4.5 TABLE 1: DV/PV REQUIREMENTS DV and PV must be conducted on parts unless approved by Design Engineer. X= Required Sample Size To be done at DV testing To be done
28、at PV testing 3.4.1 Grind-Saw 3 X 3.4.2 Bend Test 3 X 3.4.3 Scribe-Grid Test 3 X X 3.4.4 Thermal Shock 3 X X 3.5 Plating Thickness* 3 X 3.6 CASS Thermal Cycle 3 X * See Design Engineer for number and location of test sites per part. ENGINEERING PERFORMANCE SPECIFICATION WSS-M1P83-D1 Copyright 2014, Ford Global Technologies, LLC Page 5 of 5 5. SUMMARY OF REVISIONS 2011 09 19 Revised 4.1 reference for Plating Grade Mineral Filled Nylon from WSS-M4D429-C1 to WSK-M4D667-A.
