1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 15 Revised Inserted 3.0; Deleted 3.7 Revised clauses 3.3.2, 3.4 was 7 sheets 1977 03 28 Released SM/EQ 8215 TP Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 3 DECORATIVE ELECTROPLATING OF ZINC
2、DIE CAST- SK-M1P9009-A MATT BLACK SK-M1P9010-A 1. SCOPE The material defined by these specifications is for finished coatings of copper, nickel and chromium, applied by electrolytic means onto zinc die cast parts. 2. APPLICATION These specifications were released originally for material used as coat
3、ings where matt black decorative and corrosion protective coatings are required on zinc die castings. If not otherwise specified on the drawing, all parts shall be finished with a final chromium plate. SK-M1P9009-A: INTERIOR. SK-M1P9010-A: EXTERIOR 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODU
4、CTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 APPEARANCE If not otherwise indicated on the drawing, the parts shall have a matt black surface. The electroplated parts shall be free from surface
5、imperfections such as roughness, orange peel, crazing, cold shuts, pits, slivers, dullness, stains, breaks in the plate, and wheel marks and buff lines to the extent required by specifications for the visual inspection of appearance items established by Product Engineering. The black film need only
6、cover significant surfaces. 3.1.1 Buffing of Chromium Plating Because of the adverse effect on corrosion resistance, buffing of final chromium plating on exterior parts is not permitted. Wax polishing is allowed. 3.2 ADHESION The plate shall adhere to the base metal and show no separation when teste
7、d as follows: 3.2.1 Sawing The test part is positioned in a vice or holding fixture so that the significant plated surface is perpendicular to the saw blade and the cutting motion of the blade is in the direction which tends to pull the plating away from the base metal. ENGINEERING MATERIAL SPECIFIC
8、ATIONSK-M1P9009-A SK-M1P9010-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.2.2 Bending Any section of the part containing a significant plated surface shall be positioned in a holding fixture and subjected to repeated bending until the section fracture
9、s. 3.2.3 Thermal Shock Test Parts shall be heated to 150 C for 1 h and rapidly quenched in water at room temperature (25 +/- 2 C). Parts shall exhibit no blistering, cracking or any loss of adhesion. 3.3 COATING THICKNESS The minimum coating thickness requirements are listed under clause 3.3.3. 3.3.
10、1 Significant Surfaces All surfaces visible on a part as assembled in a vehicle, or surfaces which can be the source of corrosion products visible on an assembled vehicle, are significant surfaces. All significant surfaces shall meet the corrosion and plating thickness requirements as detailed in 3.
11、3.3. Any exception from this rule shall be accordingly indicated on the engineering drawing. Threads shall be completely plated, but shall not be considered as significant surfaces, unless so indicated on the engineering drawing. 3.3.2 Plating Thickness Measurement The optical measurement of copper
12、and nickel deposits on significant surfaces shall be considered the standard thickness test method (ASTM B 487). The chromium plate thickness of significant surfaces shall be checked by coulometric measurement of the layer to ASTM B 504. In case of dispute, a metallographic examination must be carri
13、ed out on a cross section. 3.3.3 Minimum Plating Thickness and Cass Test Requirements PLATING THICKNESS mm. x 10-3 Cu Semi- Matt Total- CASS- Bright Nickel less Cr TEST Nickel Chromium (HOURS). SK-M1P9009-A & - 7 13 0.8 & SK-M1P9010-A I 8 15 1C* 33 1.0 16(a) II 8 - 25 33 0.25 16(a) The variants I +
14、II can be used alternatively unless on the drawing one variant is made mandatory. * If bright nickel is used, a lightly peening to give matt finish is necessary. ENGINEERING MATERIAL SPECIFICATIONSK-M1P9009-A SK-M1P9010-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC
15、Page 3 of 3 Note: a) For exterior die castings contacting a sheet metal part with their parting line, the Cass Test shall be made less rigorous as follows: . One corrosion spot should be deducted when the contacting parting line is 25 to 100 millimeters long. . Deduct two corrosion spots for each pa
16、rting line 100 to 200 mm long. . For parting lines of 200 to 300 mm length, three corrosion spots shall be deducted. . For a parting line exceeding 300 mm in length, deduct four corrosion spots. b) The chromium layer must cover the surface so that discoloration is avoided. 3.4 CASS TEST This test sh
17、all be conducted as described in Ford Laboratory Test Method BQ 105-01 for the time required in 3.3.3. Failure is to be noted for surface pitting corrosion if any grid area contains more than 10 spots of 1.0 mm in diameter or larger. Any spots larger than 1.5 mm diameter shall also be considered cau
18、se for rejection. Failure of the part is to be recorded if corrosion is present on more than 2.0% of the entire significant surface. 15% or more corrosion on a grid section containing 100 squares 6 x 6 mm2placed anywhere on the significant surface shall also constitute failure. Note: This shall apply unless otherwise indicated on the engineering drawing. 3.5 PLATING METHODS It is not intended to define the specific process to be followed. Any method of plating shall be considered suitable that produces deposits which are consistent with the requirements contained in this specification.
