1、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. 2009 by Navistar, Inc. JUNE 2009 Page 1 of 5 NAVISTAR, INC. TMS (TRUCK MATERIAL SPECIFICATION) NUMBER: TM
2、S- 4117 srr TITLE: Electropolished Finishes for Stainless Steel Parts CURRENT REV No.: 0906 DATE: June 2009 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: N/A PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve
3、 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 the applicability of regulatory limits prior to use. Change No
4、tice: NEW Reference: File 30-13E Keywords: Stainless Steel, Electropolished, 1.0 APPLICATION Electropolishing is an electrochemical process used to polish a stainless steel surface by removing a microscopic amount of material from the part. This process may be used on parts requiring a very smooth,
5、lustrous, mirror finish. The process also can be used to remove scratches, grinding lines, burrs, and sharp edges. Since electropolishing removes surface material and oxide impurities, it acts to improve the corrosion resistance of stainless steel (i.e., electropassivates the surface). Other electro
6、polished finishes can produce a uniform matte or satin appearance to the surface. This can be useful when improved corrosion resistance, burr removal, or improved paint adhesion are desired on stainless steel. In some applications, such as when a color match to other chrome platings is desired, a th
7、in chromium flash can be electrodeposited on the electropolished stainless steel surface. For severe corrosion environments and/or high heat applications (e.g., exhaust stacks), a heavier chrome flash layer can be used. This specification defines the requirements for stainless steel surfaces which a
8、re electropolished, electropolished with chrome flash, or electrolytically “micro-etched” for applications which require a decorative, color match, corrosion/heat resistant finish, or “paint-ready” stainless steel surface. Such parts might include bright reflective grab handles, sunshades (requiring
9、 color match), or exhaust pipes which require both corrosion and heat resistance. These finishes are classified according to the following Types: Type 1 Electropolish only Type 2 Electropolish plus electrodeposited chrome flash (minimum Cr plating thickness of 0.08 m or 0.003 mils) applicable where
10、color match is required Type 3 Electropolish plus electrodeposited chrome flash (minimum Cr plating thickness of 0.21 m or 0.008 mils) for high heat applications Type 4 Micro-etch only 2.0 SCOPE This specification covers the requirements for four types of electropolished finishes for stainless steel
11、, including base metal requirements, process requirements, plating thickness, corrosion resistance, quality, qualification, source approval and quality control, and shipping and handling requirements. Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for Resal
12、eNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TMS-4117 TITLE: Electropolished Finishes for Stainless Steel Parts REVISION: 0906 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards.
13、Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. JUNE 2009 Page 2 of 5 2.1 Restricted Chemical Substances Effective 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 REFER
14、ENCE DOCUMENTS Unless otherwise specified 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 NAVISTAR Manufacturing Std. MS-D-13
15、CEMS A-37 NAVISTAR Engineering Design Std A-16 ASTM B 368 NAVISTAR CEMS B-50 4.0 REQUIREMENTS 4.1 Base Metal The base metal to be electropolished will be stainless steel per CEMS A-37. The specific type of stainless steel to be used for a given part will be specified on the part drawing. It should b
16、e noted that not all grades of stainless steel respond identically to electropolishing. Materials Engineering should be consulted prior to selection of the exact material type. 4.2 Finish Requirements The type of electropolished finish to be used for a given stainless steel part will be specified on
17、 the part drawing, and must meet the following requirements: 4.2.1 Type 1 Electropolish only 4.2.1.1 Process: 4.2.1.1.1 Electropolish: Use electropolish cycle which will produce the desired surface finish and match the established visual standard/criteria 4.2.1.1.2 De-Smut: Follow electropolish by a
18、 minimum of 4 rinse operations, a sulfuric (or nitric) acid rinse, and a chromic acid rinse to remove any metal salts 4.2.2 Type 2 - Electropolish plus chrome flash (color match) 4.2.2.1 Process: 4.2.2.1.1 Mechanical Polishing: mechanical polishing/buffing to be conducted on part prior to electropol
19、ishing 4.2.2.1.2 Clean: Clean buffed surface for a minimum of 3 minutes via anodic electro-cleaning/degreasing. Rinse thoroughly. 4.2.2.1.3 Electropolish: follow electropolish cycle suitable for matching the visual requirements 4.2.2.1.4 De-Smut: Follow by a minimum of 4 rinse operations, a sulfuric
20、 (or nitric) acid rinse, and a chromic acid rinse to remove any metal salts 4.2.2.1.5 Chrome Flash: part to be acid activated, followed by an electrodeposited coating of chromium to a minimum plating thickness of 0.08 m (0.003 mils) on all visible or otherwise significant surfaces (see section 4.2.5
21、) Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TMS-4117 TITLE: Electropolished Finishes for Stainless Steel Parts REVISION: 0906 This document is restricted and may not
22、 be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2009 by Navistar, Inc. JUNE 2009 Page 3 of 5 4.2.2.2 Requirements: Finished parts must be able to pass 60 hrs of copper accelerated acetic acid
23、salt spray (CASS) testing per ASTM B 368. After the specified hours of test, there will be no corrosion spots visible to the unaided eye on significant surfaces (see section 4.2.5). 4.2.3 Type 3 - Electropolish plus chrome flash (heat resistant) 4.2.3.1 Process: 4.2.3.1.1 Clean: Parts to be electrop
24、olished will be cleaned a minimum of 3 minutes via anodic electro-cleaning/degreasing, followed by a de-ionized (DI) water rinse 4.2.3.1.2 Micro-etch: On parts, such as exhaust tubing, which have welds, micro-etch for 3 minutes to clean chromium carbides from weld seams 4.2.3.1.3 Electropolish: Elec
25、tropolish parts for a minimum of 4-10 minutes with a minimum high current density range of 75-300 amp/ft2 4.2.3.1.4 De-smut: Follow by a minimum of 4 rinse operations, a sulfuric (or nitric) acid rinse, and a chromic acid rinse to remove any metal salts 4.2.3.1.5 Chrome Flash: part to be acid activa
26、ted, followed by an electrodeposited coating of chromium to a minimum plating thickness of 0.21 m (0.008 mils) on all visible or otherwise significant surfaces (see section 4.2.5) 4.2.3.2 Requirements: After exposure to a 15 minute heat cycle at 400 C (752 F) without discoloration, finished parts mu
27、st be able to pass 60 hrs of copper accelerated acetic acid salt spray (CASS) testing per ASTM B 368. After the specified hours of test, there will be no corrosion spots visible to the unaided eye on significant surfaces (see section 4.2.5). 4.2.4 Type 4 - Micro-etch only 4.2.4.1 Process: 4.2.4.1.1
28、Micro-etch: Clean and micro-etch to achieve the desired satin, matte finish and/or deburred finish, and/or paint-ready surface. Micro-etched finish must match the established visual standard/criteria. 4.2.4.1.2 De-Smut: Follow micro-etch by a minimum of 4 rinse operations, a sulfuric (or nitric) aci
29、d rinse, and a chromic acid rinse to remove any metal salts 4.2.5 Significant Surfaces Significant surfaces are defined as those which are visible, subject to wear or corrosion, or surfaces on which the coating is otherwise functionally necessary. Surfaces considered significant for a given part may
30、 be indicated on the part drawing. 5.0 QUALITY Parts finished to the requirements of this specification shall exhibit a bright and uniformly reflective finish, or uniformly matte (satin) finish (for Type 4) and shall be smooth and free of stains, pin holes, buffing and polishing lines or other defec
31、ts affecting the finished appearance. Buffing of the final chromium plating on Type 2 and Type 3 finishes is not permitted, due to the potential adverse effect Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted
32、without license from IHS-,-,-NUMBER: TMS-4117 TITLE: Electropolished Finishes for Stainless Steel Parts REVISION: 0906 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 pate
33、nt liability. 2009 by Navistar, Inc. JUNE 2009 Page 4 of 5 on corrosion resistance. 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. 6.0 QUALIFICATION Engineering qualification
34、 of electropolishing sources is required in advance of production shipments. Suppliers shall submit samples for approval 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 re
35、quirements of the specification have been met. Upon approval, styling master samples denoting the minimum level of acceptable appearance quality shall be developed and retained by the supplier and the quality department of each using NAVISTAR facility. 6.1 Quality Control Plan A Quality Control Plan
36、 for products supplied to the requirements of this specification will be established by mutual agreement between NAVISTAR 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 pr
37、ocess control.* K* Other characteristics for inclusion in the control plan may be specified on the engineering drawing and/or purchase order. * See NAVISTAR Engineering Design Standard A-16 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All suppliers to NAVISTAR are required to be
38、 registered to ISO 9001 Quality System Requirements. NAVISTAR will 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 regis
39、trar and must furnish copies of registration certificates to their Corporate Buyer upon request. 7.2 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 formula
40、tion or processing practices are permitted without approval. In the 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 D
41、evelopment of the proposed change(s). Test data indicating conformance 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. 7.3 Process C
42、ontrol The 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 the lot having been produced in a state of statistical control and with a process capable of providing all required proper
43、ties. The part Thickness of the chromium layer Copyright Navistar International Corporation Provided by IHS under license with INTERNNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NUMBER: TMS-4117 TITLE: Electropolished Finishes for Stainless Steel Parts REVISION:
44、 0906 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. 2009 by Navistar, Inc. JUNE 2009 Page 5 of 5 supplier and the plant metallurgist and/or the quality
45、 control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 8.0 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
46、 detrimental to the appearance of the part. 9.0 DESIGNATION ON DRAWINGS A note will be added to the body of the engineering drawing as follows: Finish: Type 1 per TMS-4117 (specify applicable type) The type of stainless steel to be used as the base metal will be specified in the material block (exam
47、ple: Stainless steel, Type 304, CEMS A-37). Specify significant surfaces on the part drawing when needed. 10.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this specification by contacting:
48、Materials Engineering and Technology Dept. Truck Development and Technology Center 2911 Meyer Road Fort Wayne, IN 46803 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/ Copyright Navistar International Corporation Provided by IHS under license with
