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 2011 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/AMS1640C AEROSPACE MATERIAL SPECIFICATION AMS1640 REV. C Issued 1979-01 Reaffirme
5、d 2000-06 Revised 2011-12 Superseding AMS1640B Corrosion Removing Compound for Aircraft Surfaces RATIONALE Normal specification review. 1. SCOPE 1.1 Form This specification covers a corrosion-removing compound in the form of a liquid concentrate. 1.2 Application This method is primarily concerned wi
6、th the removal of pitting corrosion and heavy surface oxidation from exterior aluminum surfaces of aircraft. 1.3 Precautions Compounds meeting the requirements of this specification may cause hydrogen embrittlement of high-strength steels and will remove cadmium plate. 1.4 Safety - Hazardous Materia
7、ls 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 to ensure familiarity wi
8、th 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 of this specification to
9、 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 cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE AMS1640
10、C Page 2 of 6 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS2350 Standards and Test Methods AMS2825 Material Safety Data Sheets AMS4049 Aluminum Alloy,
11、 Sheet and Plate, Alclad, 5.6Zn - 2.5Mg - 1.6Cu - 0.23Cr (Alclad 7075; -T6 Sheet -T651 Plate), Solution and Precipitation Heat Treated AMS-QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken,
12、 PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM D 93 Flash Point by Pensky-Martens Closed Cup Tester ASTM D 1193 Reagent Water ASTM D 1568 Sampling and Chemical Analysis of Alkybenzene Sulfonates ASTM D 2196 Viscosity Measurements and Rheological Properties of Non-Newtonian Materials by Rotati
13、onal (Brookfield) Viscometer ASTM F 483 Total Immersion Corrosion Test for Aircraft Maintenance Chemicals ASTM F 484 Stress Crazing of Acrylic Plastics in Contact with Liquid or Semi-Liquid Compounds ASTM F 502 Effects of Cleaning and Chemical Maintenance Materials on Plated Aircraft Surfaces ASTM F
14、 503 Preparing Aircraft Cleaning Compounds, Liquid Type, for Storage Stability Testing ASTM F 2111 Measuring Intergranular Attack or End Grain Pitting on Metals Caused by Aircraft Chemical Processes 2.3 U. S. Government Publications Available from the Document Automation and Production Service (DAPS
15、), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. MIL-PRF-25690 Plastic, Sheets and Parts, Modified Acrylic Base, Monolithic, Crack Propagation Resistant MIL-STD-794 Parts and Equipment, Procedures for Packaging and Packing o
16、f SAE AMS1640C Page 3 of 6 3. TECHNICAL REQUIREMENTS 3.1 Material Compounds meeting the requirements of this specification shall be viscous, thixotropic, and concentrated. Compounds will readily mix with water to form a homogeneous solution. Compound, diluted with ASTM D 1193, Type IV, water, to use
17、 concentration in accordance with manufacturers recommendations, shall retain its thixotropic properties, shall be suitable for application by rinsing or spraying, and shall be readily removable by wiping or rinsing procedures. 3.1.1 There shall be no violent or dangerous reactions when the concentr
18、ate is diluted for use in accordance with manufacturers recommendations. 3.2 Properties Compound shall conform to the following requirements; tests shall be performed in accordance with specified test methods on the product supplied in concentrated form and at use dilution recommended by the manufac
19、turer as hereinafter specified. 3.2.1 Concentrated Compound 3.2.1.1 Flash Point Shall be not lower than 150 F (65 C), determined in accordance with ASTM D 93 Pensky Martins Closed Cup Tester. 3.2.1.2 Solubility Compound shall be completely soluble in water to make a uniform solution free from gelati
20、nous lumps, layering of ingredients, and sediment. 3.2.1.3 Stability Compound shall remain homogeneous and free from sedimentation and layering of ingredients, determined in accordance with ASTM F 503. Compound, stored in unopened shipping container or use package, shall meet all other technical req
21、uirements of this specification at any time up to one year from date of receipt by purchaser. 3.2.2 Concentrated Compound and at Use Dilution 3.2.2.1 Viscosity Shall be not lower than the following, determined in accordance with ASTM D 2196 at 68 F 4 (20 C 2) using a No. 1 spindle at 6 RPM: Concentr
22、ated Compound 550 cP (mPas) 50% Solution of Concentrate in ASTM D 1193, Type IV, Water 55 cP (mPas) 3.2.2.2 Immersion Corrosion Compound shall neither show evidence of pitting, or corrosion nor cause an average weight change on AMS4049 and AMS-QQ-A-250/4 aluminum alloys panels greater than 2.5 mg/in
23、2per 30 minutes (0.4 mg/cm2per 30 minutes), determined in accordance with ASTM F 483 under the test conditions given in 3.2.2.2.1. Staining is not acceptable for AMS4049 panels but is allowable for the AMS-QQ-A-250/4 panels. 3.2.2.2.1 The weighed panels shall be totally immersed in 100 mL of compoun
24、d, immediately removed, and suspended vertically for 30 minutes 1 at 77 F 4 (25 C 2). SAE AMS1640C Page 4 of 6 3.2.2.3 Intergranular and Pitting Attack on Aluminum. The compound shall not cause end grain pitting in excess of 0.001 inch (25.4 microns) or intergranular attack in excess of 0.0002 inch
25、(5.1 microns) depth of AMS-QQ-A-200 aluminum alloy 7075-T6511 or 7178-T6511 when tested in accordance with ASTM F 2111 and 3.2.2.3.1. 3.2.2.3.1 Clean the ASTM F 2111 aluminum alloy specimens by wiping with a clean cloth wet with methyl ethyl ketone or other suitable solvent. Allow specimens to air d
26、ry. Immerse specimens for 30 minutes in 500 mL of compound. Remove specimens, immediately flush residual compound from the specimen surfaces with flowing water, followed by rinsing with flowing ASTM D 1193, Type IV, water. Allow to air dry. Examine specimens for pitting and intergranular attack in a
27、ccordance with ASTM F 2111. 3.2.2.4 Effect on Transparent Plastics Compound shall not craze, stain, or discolor MIL-PRF-25690 stretched acrylic plastic, determined in accordance with ASTM F 484. 3.2.2.5 Effect on Painted Surfaces Compound shall neither decrease the hardness of the paint film by more
28、 than one pencil hardness level nor shall it produce any streaking, discoloration, or blistering of the paint film, determined in accordance with ASTM F 502. 3.3 Quality Compound, as received by purchaser, shall be a homogeneous liquid free from sediment, abrasives, skins, lumps, and other impuritie
29、s detrimental to usage of the compound. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of compound shall supply all samples for vendors tests and shall be responsible for the performance of all required tests. Purchaser reserves the right to sample and to perform any co
30、nfirmatory testing deemed necessary to ensure that the compound conforms to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Viscosity (3.2.2.1) and immersion corrosion (3.2.2.2) are classified as acceptance tests and shall be performed on each lot. 4.2.2 Periodic Tests Fla
31、sh point (3.2.1.1), solubility (3.2.1.2), effect on transparent plastics (3.2.2.3), and effect on painted surfaces (3.2.2.4) are classified as periodic tests and shall be performed at a frequency selected by the manufacturer unless frequency of testing is specified by purchaser. 4.2.3 Preproduction
32、Tests All technical requirements of this specification are classified as preproduction tests and shall be performed prior to or on the initial shipment of compound to a purchaser, when a change in material, processing, or both requires re-approval as in 4.4.2, and when purchaser deems confirmatory t
33、esting to be required. SAE AMS1640C Page 5 of 6 4.2.3.1 For direct U.S. Military procurement, substantiating test data and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, contracting officer, or request for procurement. 4
34、.3 Sampling Shall be in accordance with all applicable requirements of ASTM D 1658; a lot shall be all compound produced in one continuous manufacturing operation from the same lots of raw materials and presented for vendors inspection at one time. 4.3.1 When a statistical sampling plan and acceptan
35、ce quality level (AQL) have been agreed upon by purchaser and vendor, sampling shall be in accordance with such plan in lieu of sampling as in 4.3 and the report of 4.5 shall state that such plan was used. 4.4 Approval 4.4.1 Sample compound shall be approved by purchaser before compound for producti
36、on use is supplied, unless such approval be waived by purchaser. Results of tests on production compound shall be essentially equivalent to those on the approved sample. 4.4.2 Vendor shall use ingredients, manufacturing procedures, and methods of inspection on production compound which are essential
37、ly the same as those used on the approved sample compound. If necessary to make any change in ingredients or in manufacturing procedures, vendor shall submit for re-approval a statement of the proposed changes in material, processing, or both and, when requested, sample compound. Production compound
38、 made by the revised procedure shall not be shipped prior to receipt of re-approval. 4.5 Reports Unless waived by purchaser, the vendor of the compound shall furnish with each shipment a report showing the results of tests to determine conformance to the acceptance test requirements and, when perfor
39、med, to the periodic test requirements and stating that the compound conforms to the other technical requirements of this specification. This report shall include the purchase order number, lot number, AMS1640C, manufacturers identification, and quantity. 4.5.1 A material safety data sheet conformin
40、g to AMS2825, or equivalent, shall be supplied to each purchaser prior to, or concurrent with, the report of preproduction test results or, if preproduction testing be waived by purchaser, concurrent with the first shipment of compound for production use. Each request for modification of compound fo
41、rmulation shall be accompanied by a revised data sheet for the proposed formulation. 4.5.2 A bulletin describing the compound and method of use shall be provided by the compound manufacturer. This bulletin shall provide the purchaser with detailed instructions for use of the compound. The bulletin s
42、hall also include mixing instructions, material compatibility, properties, control analysis procedures, and safety practices including precautions pertaining to hazardous ingredients, and recommended dilution for use. 4.6 Resampling and Retesting If any sample used in the above tests fails to meet t
43、he specified requirements, disposition of the compound may be based on the results of testing three additional samples for each original nonconforming sample. Failure of any retest sample to meet the specified requirements shall be cause for rejection of the compound represented and no additional te
44、sting shall be permitted. Results of all tests shall be reported. SAE AMS1640C Page 6 of 6 5. PREPARATION FOR DELIVERY 5.1 Identification Each container of compound shall be legibly marked with not less than AMS1640C, purchase order number, manufacturers identification, lot number, and quantity. 5.2
45、 Packaging 5.2.1 Compound shall be packaged in containers of a type and size agreed upon by purchaser and vendor. 5.2.2 Containers of compound shall be prepared for shipment in accordance with commercial practice and in compliance with applicable rules and regulations pertaining to the handling, pac
46、kaging, and transportation of the compound to ensure carrier acceptance and safe delivery. Packaging shall conform to carrier rules and regulations applicable to the mode of transportation. 5.2.3 For direct U.S. Military procurement, packaging shall be in accordance with MIL-STD-794, Level A or Leve
47、l C, as specified in the request for procurement. Commercial packaging as in 5.2.1 and 5.2.2 will be acceptable if it meets the requirements of Level C. 6. ACKNOWLEDGMENT A vendor shall mention this specification number and its revision letter in all quotations and when acknowledging purchase orders
48、. 7. REJECTIONS Compound not conforming 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 for the convenience of the user in locating areas where technical revisions, not editorial changes, have
49、 been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. 8.2 Terms used in AMS are clarified in ARP1917. 8.3 Dimensions and properties in inch/pound units and the Fahrenheit temperatures are
