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. 2014 by Navistar, Inc. JUNE 2014 Page 1 of 7 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS G-21 Former Designation: CEMS G-21 TITLE: Anodic Coatings on Aluminum CURRENT REV. No.: 1406 DATE: JUNE 2014 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES; CEMS G-21 Feb. 2007 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT
3、 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 the applicability of r
4、egulatory limits prior to use. Change Notice: Changed to new MPAPS format; added Section A.0 (formerly CEMS G-21 Appendix) to end of this spec; added section A.4 on anodizing of weld metal; editorial changes. 1.0 SCOPE This specification covers the requirements for an electrolytically oxidized coati
5、ng applied to aluminum or aluminum alloys for purposes of appearance, corrosion resistance, electrical (insulating) properties, or abrasion resistance. The coating may be color dyed for identification or decoration. 2.0 INTRODUCTION The method used for applying this finish generally consists of an e
6、lectrolytic treatment of the aluminum in an acid bath. Coatings for decorative purposes may be dyed. All coatings, except those specifically used for abrasion resistance, must be hot water sealed. Details of processing are not limited by this specification. Three classes of anodic coatings are descr
7、ibed in this specification: Class A - Decorative exterior Class B Decorative interior Class C Hard coat for abrasion resistance 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 MPAPS
8、B-50 specification. 3.0 CONTENTS PAGE REFERENCE DOCUMENTS 2 CLASSIFICATION 2 PROPERTY REQUIREMENTS 2 QUALITY 3 METHODS OF TEST 4 SOURCE APPROVAL AND QUALITY CONTROL 4 DESIGNATION ON DRAWINGS AND PURCHASE ORDERS 5 PACKING AND SHIPPING 5 TECHNICAL INFORMATION 6 A.0 GENERAL INFORMATION 6 NUMBER: MPAPS
9、G-21 TITLE Anodic Coatings on Aluminum REVISION: 1406 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. 2014 by Navistar, Inc. JUNE 2014 Page 2 of 7 4.0 RE
10、FERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 ASTM B 244 NAVISTAR Manufacturing
11、 Standard MS-D-13 ASTM B 136 ASTM B 368 NAVISTAR MPAPS C-8 ASTM B 137 ASTM D 4060 NAVISTAR MPAPS C-10 ASTM B 487 ASTM B 680 NAVISTAR MPAPS GT-31 5.0 CLASSIFICATION Anodic coatings are classified by their application and the thickness of the coating. 6.0 PROPERTY REQUIREMENTS TABLE I - COATING REQUIR
12、EMENTS Requirement Class Typical Application A B C* Decorative (for exterior exposure) Decorative (for interior exposure) Primarily for wear resistance Thickness, min inch 0.0003 0.00015 0.002 m 8 4 50 Weight, min mg/inch2 13 7 85 g/m2 20.2 10.8 132 Sealing Required yes yes not permitted Sealing Tes
13、t pass pass not required CASS Test, hours* 6 not required not required Color-dyed Coatings 500 250 not required color stability, hours color leaching pass pass not required Heat Test not required pass not required Abrasion Resistance not required not required * * This is a hard abrasion resistant co
14、ating. Depending upon the alloy, thicknesses are available up to 0.008 inch (0.2 mm). When special thicknesses are required, they will be specified on the drawing. Specific requirements for abrasion resistance shall be specified on drawing or purchase order. * After the specified hours of test, ther
15、e will be no corrosion spots visible to the unaided eye on 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 be in
16、dicated on the part drawing. Test methods are described in Section 8.0. Other requirements for test duration may be specified on the part drawing or purchase order. NUMBER: MPAPS G-21 TITLE Anodic Coatings on Aluminum REVISION: 1406 This document is restricted and may not be sent outside Navistar, I
17、nc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. JUNE 2014 Page 3 of 7 6.1 Material The type of aluminum to be anodized will be designated on the part drawing, referencing applicable NAVISTAR materi
18、als specifications (see MPAPS C-10 for wrought aluminum and MPAPS C-8 for aluminum castings). 6.2 Pretreatment Anodic coatings reproduce the texture of the surface from which they are formed. Therefore, limitations to surface defects (such as scratches, porosity, cracks, etc.) which might adversely
19、affect the final appearance of the part, along with the desired surface pretreatment, should be specified on the part drawing and/or purchase order. 6.2.1 Pretreatments are either mechanical or chemical in nature. Used alone or in combination, they provide a wide variety of glosses and textures to t
20、he aluminum surface. Selected finishes suitable for routine use are listed in Table II. Numerous other surface effects can be achieved by other chemical and mechanical treatments of the surface texture. Consultation with Materials Engineers and/or suppliers can provide information on other surface e
21、ffects that may be available for use. TABLE II - PRETREATMENT FINISHES Aluminum Association Designation* Description Mechanical Finishes M10 mill finish or as fabricated- gloss unspecified M11* as fabricated high gloss M21 polished and buffed smooth, high gloss M22 buffed moderately high gloss M32 d
22、irectional polish medium satin M35 directional brush with wheels or sanders moderately coarse M42 nondirectional mattte using very fine grit or glass beads M45 nondirectional texture using fine shot Chemical Finishes C10 nonetched, cleansed gloss unspecified C22 etched medium matte C31 bright dipped
23、 high gloss * Partial list extracted from ”Designation System for Aluminum Finishes”, document #45, available from the Aluminum Association, 750 Third Avenue, New York, NY 10017. * Often referred to as Automotive Trim Finish, and used primarily for rolled, not extruded, sections. 7.0 QUALITY The ano
24、dic coating will be continuous, smooth, adherent, uniform in appearance, and will be free from powdery areas, stains, discontinuities such as breaks and scratches, or other damage. NUMBER: MPAPS G-21 TITLE Anodic Coatings on Aluminum REVISION: 1406 This document is restricted and may not be sent out
25、side Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. JUNE 2014 Page 4 of 7 8.0 METHODS OF TEST 8.1 Sample Requirements Final approval and the establishment of standards for color, textur
26、e, thickness, etc., must be done on the first pieces from a production lot. From subsequent shipments select for test one or more samples at random. The number of samples to be selected from each lot will be specified by the purchaser. If results fall below the test requirements or fail to meet appe
27、arance standards, the shipment may be rejected. 8.2 Test Methods 8.2.1 Thickness The coating thickness may be determined by the eddy current method according to ASTM B 244. In the event of conflicts regarding coating thickness, the microscopic test method, ASTM B 487, is the referee test method. Oth
28、er test methods may be used upon agreement between supplier and purchaser. 8.2.2. Weight The coating weight will be determined according to ASTM B 137. 8.2.3 Seal Quality Test for seal quality according to ASTM B 136, as required. The acid dissolution test (ADT) per ASTM B 680 may be used as an alte
29、rnate test method; samples tested using this method will pass seal quality if maximum ADT rating is 6.0. 8.2.4 CASS Test The copper-accelerated acetic acid salt spray (CASS) test will be conducted according to ASTM B 368. 8.2.5 Color Stability Class A (exterior) color-dyed parts will be tested for t
30、he required number of hours according to Methods C or D per MPAPS GT-31. For Class B (interior) color-dyed parts, testing will be performed for the required number of hours in accordance with Methods E or F per MPAPS GT-31. Other similar test methods may be performed upon prior agreement between pur
31、chaser and supplier, or as specified on the engineering drawing or purchase order. There will be no appreciable change in color after the required testing when compared with an untested color-dyed sample (or approved standard). 8.2.6 Color Leaching There will be no leaching of color when the dyed an
32、odized part is immersed in 50 percent by volume nitric acid at room temperature for 2 minutes. 8.2.7 Heat The anodized coating on the part will not craze or crack when heated in an oven to 220 F (105 C) for 30 minutes. 8.2.8 Abrasion Resistance Conduct test in accordance with ASTM D 4060. 9.0 SOURCE
33、 APPROVAL AND QUALITY CONTROL 9.1 Supplier Requirements All suppliers to NAVISTAR are required to be 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) documenta
34、tion and approval requirements. Suppliers must NUMBER: MPAPS G-21 TITLE Anodic Coatings on Aluminum REVISION: 1406 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 l
35、iability. 2014 by Navistar, Inc. JUNE 2014 Page 5 of 7 maintain their certification with an accredited registrar and must furnish copies of registration certificates to their International Corporate Buyer upon request. 9.2 Approval Parts supplied against contracts or purchase orders citing this spec
36、ification 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 the event that changes in material, properties, processing practices, construction, color, or labeling of the prod
37、uct are required, the supplier shall notify Materials Engineering and Purchasing and Supplier Development 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 accord
38、ance with CFR Title 29, Part 1910 shall be submitted with the request for change. 9.3 Process Control 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 produce
39、d in a state of statistical control and with a process capable of providing all required properties. The part supplier and the quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 9.4 Approval of Suppliers Artwork (Where Applicabl
40、e) The supplier will have his finished artwork approved by the appropriate engineering department. For Truck applications, the artwork will be approved by the Industrial Design group, 2601 Navistar Dr., Lisle, IL 60532. 10.0 DESIGNATION ON DRAWINGS AND PURCHASE ORDERS Drawings and purchase orders fo
41、r anodized aluminum parts will specify the material, the class of coating and the pretreatment. Tolerances shown on drawings will be the final dimensions after anodizing. Examples: Aluminum Alloy 5657-H25, MPAPS C-10; Anodized Coating, Class A-M22, MPAPS G-21 Aluminum Alloy 3003-0, MPAPS C-10; Anodi
42、zed Coating, Green Dyed, Class B-M21C31, MPAPS G-21 Aluminum Alloy 5052-H32, MPAPS C-10; Anodized Coating, Class C, except thickness to be 0.0015 + 0.0005 inch (38 + 13m), MPAPS G-21 11.0 PACKING AND SHIPPING Decorative parts shall be packed so as to avoid damage in shipping and handling. Shipping a
43、nd identification shall be in accordance with Manufacturing Standard MS-D-13. NUMBER: MPAPS G-21 TITLE Anodic Coatings on Aluminum REVISION: 1406 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are
44、required to assume all patent liability. 2014 by Navistar, Inc. JUNE 2014 Page 6 of 7 12.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may obtain controlled copies of this specification by contacting: Materials Engineering
45、and Technology Dept. 10400 W. North Ave. Melrose Park, IL 60160 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:/ SECTION A.0 GENERAL INFORMATION (Not a Requirement) A.1 THE ANODIC PROCESS Alumi
46、num anodizing is an electrochemical method which produces a thicker protective oxide coating than that normally produced by the atmosphere. This thicker coating, which is very hard and porous, enhances abrasion and corrosion resistance. The porous cellular structure permits dyeing. A.1.1 Appearance
47、Apparent color or shade of an anodic coating is affected by luster or opacity. Maximum luster or brightness is obtained on high purity aluminum. Aluminum alloys such as 5457 containing magnesium as the principal alloying element respond well to anodizing and the alloying constituents do not tint the
48、 coatings. Alloys containing silicon may give the coating a gray or brown tint. Manganese and chromium may give brown and yellow tints, respectively. A.1.2 Surface pretreatment Anodic coatings reproduce the texture of the surface from which they are formed, because anodizing is a surface conversion process. Therefore, surface pretreatment is necessary to obtain the desired appearance. Polis
