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. APRIL 2014 Page 1 of 4 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS G-4518 Former Designation: TMS-4518 TITLE: Corrosion Protective Coatings for Fasteners CURRENT REV No.: 1404 DATE: APRIL 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: TMS-4518 - Aug. 2013 PRINTED COPIES OF THIS DOCUMENT MUST BE VER
3、IFIED 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 the a
4、pplicability of regulatory limits prior to use. Change Notice: Changed to new MPAPS format; editorial changes. 1.0 APPLICATION This specification covers the requirements for a silvery colored, corrosion protective coating consisting of a zinc phosphate conversion coating, covered by a zinc-rich base
5、coat, and an integrally lubricated aluminum-rich topcoat. This coating system is free of both hexavalent and trivalent chromium. These finishes are intended for use on ferrous fasteners and clips where high levels of corrosion protection and freedom from hydrogen embrittlement are required (such as
6、high hardness parts). This coating should not be used on parts which will come in contact with uncoated copper, magnesium, or stainless steel, but will provide good bi-metallic corrosion resistance when in contact with aluminum. Coating should not be used on materials which might be adversely affect
7、ed by the cure temperature range of 200-255C (392-491F). The maximum continuous service temperature is 260C (500F). Two types of coatings are included: Type I silver color; for use on externally or internally threaded fasteners M6 and larger and other small parts such as spring clips, brackets, etc.
8、; 840 hours minimum salt spray to red rust. Type II silver color; for use on internally threaded parts M6 and larger (e.g., nuts); 480 hour minimum salt spray to red rust. 2.0 SCOPE This specification covers the general coating process, coating performance and fastener torque-tension requirements, q
9、uality, KCC, source approval and quality control, packing, shipping, and identification requirements, and designation on drawings. 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 MPA
10、PS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following standards, specifications and regulations are referenced in this specification. NUMBER: MPAPS G-4518 TITLE: Corrosion Protective Coatings for Fasteners R
11、EVISION: 1404 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. APRIL 2014 Page 2 of 4 Quality System Standard ISO 9001 or TS-16949
12、ASTM B 117 SAE J2334 CFR Title 29, Part 1910 MPAPS B-50 SAE/USCAR-11 NAVISTAR Engr. Design Standard A-16 ASTM G154 NAVISTAR Mfg Std MS-D-13 4.0 GENERAL REQUIREMENTS 4.1 Coating Requirements 4.1.1 Zinc-Phosphate Treatment A zinc phosphate coating shall be applied to the pre-cleaned steel substrate. T
13、he phosphate coating shall be sealed, uniformly dense over the entire surface and exhibit a thickness equivalent to a coating weight of 2-13 g/m2. 4.1.2 Basecoat The basecoat for both Types I and II consists of an inorganic zinc-rich layer, having minimum thickness of 7 m (or coating weight of 24 g/
14、m2 min). Typical thickness will be 7-10 m. The basecoat is oven baked after application at 200-255C (392-491F). 4.1.3 Topcoat The topcoat for both Types I and II consists of an organic aluminum-rich layer, having minimum thickness of 5 m (or coating weight of 8 g/m2 min). Typical thickness will be 5
15、-8 m. The Type I product uses a higher percentage of aluminum in the coating. The topcoat is oven baked after application at 180-220C (356-428F). The topcoat includes an integrated friction modifier to eliminate the need for sealers or post-coating lubricants. 4.1.4. Maximum Thickness on Threads The
16、 coatings will have no adverse effects upon production assembly and disassembly practices. The maximum thickness on threads is limited by the basic thread size and tolerances. After coating, the parts must pass the appropriate thread GO gages without sticking or binding. An evaluation of coating thi
17、ckness on threads will be included in the Quality Control Plan for each part. 4.1.5 Appearance Parts shall have a uniform silvery appearance, be thoroughly cured, and free from runs and sags. The coating shall not be oily or tacky to the touch. 4.2 Part Performance 4.2.1 Adhesion (Humidity Testing)
18、4.2.1.1 Method Parts shall be tested for 100 hours min in 100% RH at 38C (100F), after 72 hours minimum aging at room temperature. Alternatively, parts may be heated to 120 C (248 F) for 60 minutes. 4.2.1.2 Requirement Parts shall show no evidence of blistering, flaking, peeling, or appearance chang
19、es. Test panels coated per this specification, or parts suitable for tape testing, shall show no more than 3.0 mm (0.12 in) peel back from intersection of two lines (angle of 25 5 degrees) scribed and tape tested after a 10 minute recovery period following humidity exposure. 4.2.2 Flexibility Coatin
20、g shall withstand normal handling and storage conditions without chipping and shall be capable of withstanding the normal extension and compression of springs and normal flexing of parts such as spring clips during assembly without loss of adhesion. NUMBER: MPAPS G-4518 TITLE: Corrosion Protective C
21、oatings for Fasteners REVISION: 1404 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. APRIL 2014 Page 3 of 4 4.2.3 Corrosion Resist
22、ance (Salt Spray Testing) Coated parts shall be subjected to corrosion testing in neutral salt spray per ASTM B117 and/or cyclic corrosion testing per SAE J2334. Parts shall not exhibit overall ferrous corrosion exceeding 0.1% per ASTM D 610, Grade 8, after testing per the following schedule: Coatin
23、g Type Salt spray testing Cyclic corrosion testing White corrosion Red rust Red rust I 240 hr 840 hr 60 cycles II 240 hr 480 hr 30 cycles Threaded parts shall be rated on areas other than the threaded portion. 4.2.4 Weathering Resistance (Weatherometer) 4.2.4.1 Method Test for 1000 hours in accordan
24、ce with ASTM G154 using a cycle of 51 minutes of light only at 60 3C (140 5F) and light with spray water temperature at 7 3C (45 5F) for nine minutes. 4.2.4.2 Requirement Part shall show no blistering, peeling, cracking, loss of adhesion, discoloration, or red rust. 4.2.5 Torque Tension Requirement
25、4.2.5.1 Method SAE/USCAR-11 Control parts (7/16 x 20UNF or M10 bolts) shall be processed along with each production lot of parts being coated. The control parts will be tested to determine the torque required to develop a specified tension value in the fastener. 4.2.5.2 Required The measured torque
26、value shall be within 3 of the median value established for this fastener. 6.0 QUALIFICATION Pre-production samples, accompanied by a certified laboratory report-indicating conformance to all requirements of this specification, shall be submitted to Fastener Engineering for testing and approval prio
27、r to shipment of production parts. 6.1 Quality Control Plan A Quality Control Plan 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 appli
28、cable*, shall be included in the plan as features for management by statistical process control.* * 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. NUMBER: MPAPS G-4518 TITLE:
29、Corrosion Protective Coatings for Fasteners REVISION: 1404 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. APRIL 2014 Page 4 of 4
30、7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 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)
31、 documentation and approval requirements. Suppliers must maintain their certification with an accredited registrar 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 sh
32、all 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 product are requ
33、ired, the supplier shall notify NAVISTAR 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 accordanc
34、e with CFR Title 29, Part 1910 shall be submitted with the request for change. 7.3 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 produced i
35、n 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. 8.0 SHIPPING AND HANDLING Shipping and identification
36、 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. 9.0 DESIGNATION ON DRAWINGS Drawings shall reference this specification as follows: Finish per MPAPS G-4518 Type I or Type II
37、 (as appropriate) 10.0 APPROVED PRODUCTS Type I Magni 565 (The Magni Group) Type II Magni 511 (The Magni Group) Types I and II DELTA-PROTEKT KL100/DELTA-SEAL GZ (Silver) (Doerken Corp.) 11.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact
38、: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue 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:/
