1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2013 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS2514A AEROSPACE MATERIAL SPECIFICATION AMS2514 REV. A Issued 1995-01 Revised 2
5、001-03 Reaffirmed 2013-11 Superseding AMS2514Anodic Coating on Aluminum Alloys Sulfuric Acid Process, Resin-Sealed RATIONALE AMS2514A has been reaffirmed to comply with the SAE five-year review policy. 1. SCOPE:1.1 Purpose: This specification covers the engineering requirements for producing an anod
6、ic coating on aluminum and aluminum alloys which are subsequently sealed with an organic resin.1.2 Application: This coating has been used typically to increase corrosion resistance and provide surfaces which will ensure adhesion of subsequent organic finishes, but usage is not limited to such appli
7、cations. This process is applicable to all forms and alloys of aluminum. Coatings produced through resin-seal anodizing cannot be subsequently dyed. This process is not suitable for parts which contain joints or recesses in which the solutions utilized in the anodizing process may be retained.1.3 Sa
8、fety - Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user
9、 to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.2. APPLICABLE DOCUMENTS: The issue of the following documents in effect on the date of the purchase order forms a part
10、 of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been canceled and no superseding document has been specified, the last published issue of that document
11、shall apply.SAE INTERNATIONAL AMS2514A Page 2 of 7 2.1 SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.AMS 4037 Aluminum Alloy Sheet and Plate, 4.4Cu - 1.5Mg - 0.60Mn (2024; -T3 Flat Sheet, -T351 Plate), Solution Heat Treated2.2 ASTM Publications: Available fr
12、om ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.ASTM B 117 Operating Salt Spray (Fog) Testing ApparatusASTM B 487 Measurement of Metal and Oxide Coating Thicknesses by Microscopical Examination of a Cross SectionASTM B 567 Measurement of Coating Thickness by the Beta Backscatter Met
13、hod3. TECHNICAL REQUIREMENTS: 3.1 Solutions: 3.1.1 Shall be an aqueous solution of sulfuric acid of suitable concentration, nominally 15% by weight. The anodizing solution shall be maintained at a temperature within the range 68 to 72 F (20 to 22 C).3.1.2 Neutralizing Rinse: Shall be an aqueous solu
14、tion of 4 to 6% by weight commercial grade sodium bicarbonate maintained at a temperature below 80 F (27 C) or other suitable neutralizing solution. Water used for solution preparation shall meet the requirements of 3.2.4.3.1.3 Sealer: Shall be a colloidal suspension in water of a suitable resin con
15、centrate. The resin concentrate shall be diluted with water and maintained in accordance with manufacturers instruction.3.2 Procedure: 3.2.1 Preparation: All fabrication-type operations, such as heat treatment, machining, forming, brazing, welding, and perforating, shall be completed before parts ar
16、e anodized.3.2.2 Cleaning: Parts shall be cleaned to a water-break-free surface and deoxidized prior to anodizing. Acid or alkaline etching may be used to enhance surface preparation or coating adhesion. The etchants shall be suitably inhibited against intergranular attack.3.2.3 Anodizing: Direct cu
17、rrent shall be applied as required to maintain an anode current density of 10 to 15 amperes per square foot (110 to 160 A/M2) at a voltage of 6 to 14 volts. Time of anodizing shall be that required to produce a coating which meets the requirements of 3.3. Other conditions of voltage, current density
18、, electrolyte concentration, temperature, and time may be used when acceptable to purchaser.SAE INTERNATIONAL AMS2514A Page 3 of 7 3.2.4 Rinsing: After anodizing, parts shall be rinsed in cold, running tap water for not less than five minutes. Demineralized water shall be used for all rinsing after
19、anodizing when water with 50 parts per million (ppm) or less total solids content is not available. The total chloride content of the water shall not exceed 25 parts per million. After water rinsing, parts, other than castings, shall be immersed for not less than ten minutes in the neutralizing rins
20、e of 3.1.2. Casting alloys shall be held in the neutralizing rinse for not less than 30 minutes. After rinsing in the neutralizing rinse, parts shall be rinsed in water for an additional five minutes or longer.3.2.5 Resin Sealing: Following water rinsing, parts, while still wet, shall be totally imm
21、ersed in the resin sealer for the time recommended by the sealer manufacturer. The resin seal tank shall remain covered for the time the parts are immersed. On completion of sealing, parts shall be removed from the resin seal tank and left untouched on the processing racks for not less than two hour
22、s. Tear dropping of resin is permissible but teardrop areas shall not be used in determining coating thickness. Resin sealed parts shall not be handled or top coated until sealer has been cured in accordance with manufacturers instructions.3.3 Properties: Resin sealed anodic coated parts shall confo
23、rm to the following properties.3.3.1 Coating Thickness: Parts shall be processed to obtain a final coating thickness of 0.0003 to 0.0005 inch (7.6 to 12.7 mm). Other coating thicknesses may be specified by purchaser.3.3.1.1 Thickness of coating shall be determined on representative parts or specimen
24、s (4.3.3) in accordance with ASTM B 487, ASTM B 567, or other method acceptable to purchaser. Coating thickness shall not apply to blind holes, recesses with depth greater than twice the diameter, or in open holes with depth greater than seven times the diameter unless a specific thickness is specif
25、ied in those areas.3.3.2 Corrosion Resistance: Coated and sealed panels of AMS 4037 aluminum alloy sheet shall withstand exposure for not less than 500 hours to salt spray corrosion testing in accordance with ASTM B 117 except that the significant surface shall be inclined approximately 6 degrees fr
26、om vertical. The exposed panels shall show no more than a total of 15 scattered spots or pits, none larger than 1/32 inch (0.8 mm) in diameter, in a total of 150 square inches (968 cm2) of test area grouped from five or more test pieces, or more than five scattered spots or pits, none larger than 1/
27、32 inch (0.8 mm) in diameter, in a total of 30 square inches (194 cm2) from one or more test pieces. Areas within 1/16 inch (1.6 mm) from identification markings, and at electrode contact marks remaining after processing, need not be included.3.4 Quality: The coating, as received by purchaser, shall
28、 be continuous, uniform in color, shall not exhibit evidence of arcing or burning, and shall be free from powdery areas and other imperfections detrimental to usage of the coating.SAE INTERNATIONAL AMS2514A Page 4 of 7 4. QUALITY ASSURANCE PROVISION: 4.1 Responsibility for Inspection: The processor
29、shall supply all samples for processors tests and shall be responsible for the performance of all required tests. Where parts are to be tested, such parts shall be supplied by purchaser. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensure that pr
30、ocessing conforms to the requirements of this specification.4.2 Classification of Tests: 4.2.1 Acceptance Tests: Thickness (3.3.1) and quality (3.4) are acceptance tests and shall be performed on each lot.4.2.2 Periodic Tests: Corrosion resistance (3.3.2) and tests of cleaning and processing solutio
31、ns to ensure that the coating will conform to specified requirements are periodic tests and shall be performed at a frequency selected by the processor unless frequency of testing is specified by purchaser.4.2.3 Preproduction Tests: All technical requirements are preproduction tests and shall be per
32、formed prior to or on the initial shipment of processed parts to a purchaser, when a change in material and/or processing requires reapproval by the cognizant engineering organization (See 4.4.2), and when purchaser deems confirmatory testing to be required.4.3 Sampling and Testing: Shall be not les
33、s than the following; a lot shall be all parts of the same part number, processed in the same processing solutions in a continuous series of operations in not longer than eight consecutive hours, and presented for processors inspection at one time:4.3.1 For Acceptance Tests: As shown in Table 1. TAB
34、LE 1 - Sampling for Acceptance TestingNumber of Partsin Lot Quality ThicknessUp to 78 to 1516 to 4041 to 110111 to 300301 to 500Over 500All710152535500112368SAE INTERNATIONAL AMS2514A Page 5 of 7 4.3.1.1 A statistical sampling plan, acceptable to purchaser, may be used in lieu of sampling in 4.3.1.4
35、.3.2 For Periodic Tests: Frequency of testing shall be at the discretion of the processor unless a test frequency is specified by purchaser.4.3.3 When coated parts are of such configuration or size as to be not readily adaptable to the specified tests, separate test specimens made of the same generi
36、c class of alloy as the parts represented, cleaned, coated, and sealed with the parts represented may be used.4.4 Approval: 4.4.1 The process and control factors, a preproduction sample, or both, whichever is specified by purchaser, shall be approved by the cognizant engineering organization before
37、production parts are supplied.4.4.2 The processor shall make no significant change to materials, processes, or control factors from those on which the approval was based, unless the change is approved by the cognizant engineering organization. A significant change is one which, in judgment of the co
38、gnizant engineering organization, could affect the properties or performance of the parts.4.4.3 Control factors shall include, but not be limited to, the following:Surface preparationComposition and operating temperature limits for electrolyte bathFrequency of bath analysis Voltage and/or current de
39、nsity limitsSealer used and vendor identificationComposition limits and temperature limits for seal bathMethod of thickness testingPeriodic test plan.4.5 Reports: The vendor of coated parts shall furnish with each shipment a report stating that the parts have been processed and tested in accordance
40、with specified requirements and that they conform to the acceptance test requirements. This report shall include the purchase order number, lot number, AMS 2514A, part number, sealing material identification, and quantity.SAE INTERNATIONAL AMS2514A Page 6 of 7 4.6 Resampling and Retesting: 4.6.1 If
41、the results of any acceptance test fail to meet the specified requirements, the parts in that lot may be stripped by a method acceptable to purchaser, that does not roughen or pit the basis metal, or adversely affect part dimensions, pretreated, coated, sealed as defined herein, and tested. Alternat
42、ively, all parts in the lot may be inspected for the nonconforming attribute, and the nonconforming parts may be stripped by a method acceptable to purchaser, that does not roughen or pit the basis metal or adversely affect part dimensions, pretreated, coated, sealed as defined herein, and tested.4.
43、6.2 If the results of any periodic test fail to meet the specified requirements, the process will be declared nonconforming. No additional parts shall be coated until the process is corrected and new parts or specimens are coated, sealed, and tested. Results of all tests shall be recorded and, when
44、requested, reported. Purchaser shall be notified of all parts coated since the last acceptable test.5. PREPARATION FOR DELIVERY: 5.1 Coated parts shall be handled and packaged to ensure that the required physical characteristics and properties of the coating are preserved.5.2 Packages of coated part
45、s shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, packaging, and transportation of the coated parts to ensure carrier acceptance and safe delivery.6. ACKNOWLEDGMENT: Processor shall mention this
46、 specification number in all quotations and when acknowledging purchase orders.7. REJECTIONS: Parts on which the coating does not conform to this specification, or to modifications authorized by purchaser, will be subject to rejection.8. NOTES: 8.1 A change bar ( l ) located in the left margin is fo
47、r the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this specification. An (R) symbol to the left of the document title indicates a complete revision of the specification, including technical revisions. Change bars
48、 and (R) are not used in original publications, nor in specifications that contain editorial changes only.SAE INTERNATIONAL AMS2514A Page 7 of 7 8.2 Precautions: 8.2.1 Surfaces to be painted shall be handled with care after anodizing to prevent rupture of the film and contamination by dirt or oil. P
49、ainting should be performed as soon after coating as practicable.8.2.2 Good, tight electrical contact shall be maintained during the anodic treatment to prevent burning of parts. Small irregularities of coating at points of electrical contact are acceptable.8.2.3 Anodizing baths shall be provided with an exhaust system as a protection for operators and prevention of corrosion of metal equipment in the vicinity.8.2.4 When required,
