1、NAVISTAR, INC. TMS (TRUCK MATERIAL SPECIFICATION) NUMBER: TMS- 4103 TITLE: Decorative Chromium Plating On AluminumCURRENT REV No.: 0806 DATE: June 2008 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: Rev E December 2006 PRINTED COPIES OF THIS DOCUMENT MUST BE
2、VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine th
3、e applicability of regulatory limits prior to use. Change Notice: Replaced “International Truck and Engine Corporation” with “Navistar, Inc.” per corporate directive; added Table 2 acceptance criteria; revised Section 4.2.2.3; editorial changes. Reference: File 30-13E Keywords: Chromium Plating, Chr
4、ome Plating, Aluminum 1.0 APPLICATION This specification covers bright decorative, corrosion resistant, electroplated coatings of copper, nickel, and chromium suitable for use on aluminum substrates, including SPF (superplastic formed) aluminum. These coatings are used in exterior applications expos
5、ed to severe service conditions including scratching, denting, and abrasion, such as bumpers and grilles. 2.0 SCOPE This specification covers base metal requirements, plating appearance, thickness and electrochemical potential requirements, corrosion resistance, adhesion, qualification, source appro
6、val and quality control, and shipping and handling requirements. 2.1 Restricted Chemical SubstancesEffective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the CEMS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise spec
7、ified the latest issue of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 ASTM B 487 NAVISTAR Manufacturing Std. MS-D-13 ASTM B 368 ASTM B 504 NAV
8、ISTAR Engineering Design Std A-16 ASTM B 456 ASTM B 571 NAVISTAR CEMS B-50 ASTM B 764 4.0 REQUIREMENTS 4.1 Base Metal Requirements The principal supplier is responsible for procuring the aluminum base metal of the specified composition and with an appropriate surface quality suitable to provide the
9、required surface finish, luster and corrosion resistance of the plated part. This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. JUNE
10、2008 Page 1 of 8 Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TITLE: REVISION: TMS-4103 Decorative Chromium Plating On Aluminum 0806 This document is restricted and may
11、 not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. 4.1.1 Base Metal Processing Finishing of the base metal may be performed before or after forming. Significant surface
12、s (i.e., Class A)* on the formed part shall be free of stretch marks, die marks, nicks, scratches or other defects affecting the appearance of the plated parts. Buffing of the final chromium plating is not permitted. * Engineering may designate the significant (Class A) surfaces on the engineering d
13、rawing and may also specify on the drawing check points (C points) for specific evaluation of the plating thickness. Unless otherwise specified, significant surfaces are those surfaces directly visible or visible by reflection when the finished part is assembled on the truck and/or those surfaces wh
14、ich can be a source of corrosion products which are visible either directly or by reflection. 4.2 Plating Requirements 4.2.1 Appearance Plated parts shall exhibit a bright and uniformly reflective finish. The plating shall be smooth and free of stains, pin holes, buffing and polishing lines or other
15、 defects affecting the plated appearance or the ability of the plating to pass required corrosion tests. The appearance of production parts shall match color and finish of the master samples as agreed upon between the NAVISTAR Plant Quality Control Department and the supplier. Chrome plated aluminum
16、 bumpers must meet the acceptance criteria described in Table 2. 4.2.1.1 Field service experience has indicated that some trivalent chromium plating systems produce a plated surface susceptible to premature tarnishing. Use of trivalent chromium is not permitted unless supplier has sufficient field d
17、ata to demonstrate the capability of their trivalent chromium system. 4.2.2 Thickness - ASTM B 487 and ASTM B 764 Requirements for minimum plating thickness are described in Table 1. Plating thickness may be determined by the microscopic method of ASTM B 487 or the electrochemical method of ASTM B 7
18、64. In the event of conflict, the microscopic method shall be the referee method. TABLE 1. PLATING THICKNESS MINIMUM THICKNESS ON SIGNIFICANT SURFACES (1) TYPE OF CHROME* Copper* Semi-Bright Nickel Bright Nickel Total Nickel Chrome* m inch m inch m inch m inch m inch Microporous Hexavalent 15 .0006
19、25 .0010 12 .0005 37 .0015 0.25 .00001 Conventional Hexavalent 10 .0004 36 .0014 18 .0007 54 .0021 0.25 .00001 * Microporous chrome deposited from hexavalent chrome electrolytes is the preferred type of chrome deposit. * Copper may be substituted by nickel strike as long as plating adhesion and appe
20、arance are not compromised. * A maximum of 0.5 m (.00002 inch) thickness is recommended to prevent bridging of the non-conducting particles used to produce microporous chrome. (1) The minimum thicknesses shown in Table 1 apply to specified check points (C-points) or, in the absence of indicated chec
21、k points, apply to all significant surfaces. JUNE 2008 Page 2 of 8 Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TITLE: REVISION: TMS-4103 Decorative Chromium Plating On
22、 Aluminum 0806 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. 4.2.2.1 In all cases, the semi-bright nickel thickness shall be no
23、less than 60% of total nickel thickness consisting of semi-bright, bright and special nickel layer added to provide discontinuities in chrome. 4.2.2.2 The thickness of the plating layers is dependent upon the nature of the chrome deposited as described. 4.2.2.3 Due to the complex geometry of highly
24、formed parts, such as exhaust pipes and bumpers, there may be a vast difference in the plated thickness between low and high current density locations. It may not be practical and/or cost effective to meet the minimum thickness in low current density locations on these parts. In such cases, the supp
25、lier shall request a plating thickness deviation from Materials Engineering Department at Truck Development and Technology Center. With the approval of Materials Engineering, an average of plating thickness at specified check points (C-points) may be used to meet the minimum plating thickness. Howev
26、er, at no location on the part will the plating thickness be below 60% of the minimum thickness specified. 4.2.2.4 Engineering exceptions to the minimum plating thickness requirements described herein shall be shown on the engineering drawing.4.2.3 STEP Test Requirements - ASTM B 764 The bright nick
27、el layer shall exhibit a minimum of 100mV anodic potential difference to the semi- bright nickel layer on all significant surfaces as determined per the STEP (Simultaneous Thickness and Electrode Potential) test method. 4.2.3.1 The microdiscontinuous top nickel layer shall be equal to or more noble
28、than the bright nickel layer but it shall not exhibit a potential difference greater than 20 mV more than the bright nickel layer. 4.2.4 Chrome Microporosity - ASTM B 456 The microporous chrome layer shall exhibit a minimum of 10,000 pores/cm2as determined by the copper deposition (Dubpernell) metho
29、d as described in ASTM B 456, or a minimum of 2000 pores/cm2 as determined by active corrosion sites when tested per ASTM B 456. 4.3 Corrosion Resistance - ASTM B 368 Plated parts will be subjected to copper-accelerated acetic acid salt spray (CASS) test per ASTM B 368 with the following exceptions:
30、 1. Scribe the sample to the base metal using an “X” mark with 75 mm (3 in) legs. 2. After testing for 66 hours, rinse the surface in warm water and air-dry. Clean the surface with a soft camel hair brush saturated with a mild detergent solution. Rinse the sample in warm water and wipe gently with a
31、 soft cloth. Evaluate immediately. 4.3.1 Requirements 4.3.1.1 There shall be no undercutting or peeling of the plating around the scribe mark. 4.3.1.2 There shall be no evidence of base metal corrosion deposits or blisters on the significant surfaces. 4.3.1.3 No corrosion pits larger than 1.5 mm (0.
32、062 in) are permitted on the significant surfaces. JUNE 2008 Page 3 of 8 Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TITLE: REVISION: TMS-4103 Decorative Chromium Plat
33、ing On Aluminum 0806 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. 4.4 Adhesion - ASTM B 571 Perform bend tests and grind-saw te
34、sts per ASTM B 571. 4.4.1 Requirements No peeling, flaking, or lift-off of the plating from the substrate or between layers of the plating is permitted. 5.0 QUALIFICATION Engineering qualification of plating sources is required in advance of production shipments. Suppliers shall submit samples for a
35、pproval of finish, luster, color and appearance to the Industrial Design Group at Truck Development and Technology Center. Samples shall be accompanied by test data certifying that all requirements of the specification have been met. Upon approval, styling master samples denoting the minimum level o
36、f acceptable appearance quality shall be developed and retained by the supplier and the quality department of each using NAVISTAR facility. 5.1 Quality Control Plan A Quality Control Plan for products supplied to the requirements of this specification will be established by mutual agreement between
37、International and the supplier. Unless specific exception is noted, the following characteristics, where applicable*, shall be included in the plan as features for management by statistical process control.* KCCThickness of the semi-bright nickel layer * Other characteristics for inclusion in the co
38、ntrol plan may be specified on the engineering drawing and/or purchase order. * See NAVISTAR Engineering Design Standard A-16 6.0 SOURCE APPROVAL AND QUALITY CONTROL6.1 Supplier Requirements All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR wil
39、l also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers must maintain their certification with an accredited registrar and must furnish copies of registration certificates to thei
40、r Corporate Buyer upon request. 6.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes in formulation or processing practices are permitted without approval. In t
41、he event that changes in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify Truck Development and Technology Center and NAVISTAR Purchasing and Supplier Development of the proposed change(s). Test data indicating confor
42、mance to all requirements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the request for change. JUNE 2008 Page 4 of 8 Copyright Navistar International Corporation Provided by
43、 IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TITLE: REVISION: TMS-4103 Decorative Chromium Plating On Aluminum 0806 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from
44、 Corporate Technical Standards. Suppliers are required to assume all patent liability. 2008 by Navistar, Inc. 6.3 Process ControlThe supplier shall either perform and report results of tests on specific lots of parts produced using ISO 9001 or TS-16949 guidelines, or provide statistical evidence of
45、the lot having been produced in a state of statistical control and with a process capable of providing all required properties. The part supplier and the plant metallurgist and/or the quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific pro
46、ducts. 7.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance with NAVISTAR Manufacturing Standard MS-D-13. Parts shall be packaged so as to avoid any damage in shipment detrimental to the appearance of the part. 8.0 DESIGNATION ON DRAWINGS A note will be added to the body of t
47、he engineering drawing as follows: Finish: Chrome plating per TMS-4103 The type of aluminum to be used as the base metal will be specified in the material block (example: Aluminum, 5052-H32, CEMS C-10). 9.0 TECHNICAL INFORMATION For further information related to the technical content of this specif
48、ication, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. Truck Development and Technology Center 2911 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringN Information Handling Service (IHS) 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/JUNE 2008
