1、AEROSPACE MATERIAL SPECIFICATIONAMS-R-81903Issued MAY 2001Remover, Acid Activated,For Amine-Cured Epoxy Coating SystemsNOTICEThis document has been taken directly from U.S. Military Specification MIL-R-81903A(AS), Amendment 2, Notice 1, and contains only minor editorial and format changes required t
2、o bring it into conformance with the publishing requirements of SAE technical standards. The initial release of this document is intended to replace MIL-R-81903A(AS), Amendment 2, Notice 1. Any part numbers established by the original specification remain unchanged.The original Military Specificatio
3、n was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and standards. TSB rules provide for (a) the publication of portions of unrevised government specifications
4、 and standards without consensus voting at the SAE Committee level, and (b) the use of the existing government specification or standard format.Under Department of Defense policies and procedures, any qualification requirements and associated qualified products lists are mandatory for DOD contracts.
5、 Any requirement relating to qualified products lists (QPLs) has not been adopted by SAE and is not part of this SAE technical document.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 repor
6、t is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled.
7、SAE invites your written comments and suggestions. Copyright 2008 SAE International All rights reserved. No part of this publication 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
8、 prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org Reaffirmed JAN 2008AMS-R-81903 SAE AMS-R-81903- 2 -1. SCOPE:1.1 Scope: This specif
9、ication covers the requirements for removers used on amine-cured epoxy coating systems (see 6.1). 1.2 Classification: Coating removers covered by this specification shall be of the following types and classes as specified (see 6.2).Type I Hydroxyacetic acid activatedType II Formic acid activatedType
10、 III Activated by a blend of hydroxyacetic acid and formic acidClass 1 - PhenolicClass 2 - Non-Phenolic2. APPLICABLE DOCUMENTS: The following publications, of the issues in effect on date of invitation for bids or request for bids or request for proposal, form a part of this specification to the ext
11、ent specified herein.2.1 U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.QQ-A-250/4 Aluminum Alloy 2024, Plate and SheetQQ-A-250/5 Aluminum Alloy Alclad 2024, Plate and SheetQQ-A-250/13 Aluminum Alloy Alcla
12、d 7075, Plate and SheetQQ-P-416 Plating, Cadmium (Electrodeposited)PPP-P-704 Pail, Metal: (Shipping, Steel, 1 through 12 gallons)TT-T-291 Thinner, Paint, Mineral Spirits, Regular and OdorlessMIL-C-5541 Chemical Conversion Coating on Aluminum and Aluminum AlloysMIL-C-83286 Coating, Urethane, Aliphati
13、c Isocyanate, for Aerospace ApplicationsMIL-S-7952 Steel, Sheet and Strip, Uncoated Carbon (1020 and 1025) (Aircraft Quality)MIL-A-8625 Anodic Coatings, for Aluminum and Aluminum AlloysMIL-T-9046 Titanium and Titanium Alloy, Sheet, Strip and PlateMIL-P-23377 Primer Coating, Epoxy Polyamide, Chemical
14、 and Solvent ResistantFED-STD-141 Paint, Varnish, Lacquer and Related Materials, Methods of Inspection, Sampling and TestingAMS-R-81903 SAE AMS-R-81903- 3 -2.1 (Continued):FED-STD-313 Material Safety Data Sheet, Preparation and Submission ofMIL-STD-105 Sampling Procedures and Tables for Inspection b
15、y AttributesMIL-STD-129 Marking for Shipment and Storage2.2 National Motor Freight Traffic Association, Inc., Agent Publications: Available from National Motor Freight Traffic, Tariff Department, 1616 P Street, N. W., Washington, DC 20036.National Motor Freight Classification2.3 Uniform Classificati
16、on Committee, Agent Publications: Available from Uniform Classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.Uniform Freight Classification Rules2.4 Department of Transportation Publications: Available from Superintendent of Documents, Government Printing Office, Washin
17、gton, DC 20402.49 CFR 100-199 Department of Transportation (DOT) Regulations for the Transportation of Explosive and Other Dangerous Articles by Land and Water3. REQUIREMENTS: 3.1 Qualification: The coating remover furnished under this specification shall be products which are qualified for listing
18、on the applicable qualified products list at the time set for opening of bids (see 4.3 and 6.3). In addition, the retention of the coating remover on the applicable qualified products list shall be dependent on periodic verification of continued compliance with the requirements of this specification
19、 (see 4.3.1).3.2 Material: The remover covered by this specification shall consist of organic solvents, evaporation retarders, and other ingredients needed to impart properties which conform to the requirements specified herein.AMS-R-81903 SAE AMS-R-81903- 4 -3.2.1 Composition: The formulation of th
20、e remover shall be optional with the manufacturer, except that it shall be restricted by other requirements specified herein. Type I shall contain hydroxyacetic acid but no formic acid. Type III shall be a blend of hydroxyacetic and formic acids. Removers which contain phenol, cresol, or any derivat
21、ives thereof shall be classified as Class 1 products. Removers which contain no phenol, cresol or any derivatives thereof shall be classified as Class 2 products.3.2.2 Toxicity: The material shall have no adverse effect on the health of personnel when used for its intended purpose in accordance with
22、 the directions specified herein. The remover shall contain no components which produce noxious vapors in such concentrations as to be an annoyance to personnel during coating removal operations under conditions of adequate ventilation while exercising caution to avoid prolonged contact with the ski
23、n and while observing Occupational Safety and Health Administration (OSHA) guidelines. Questions pertaining to the toxic effect shall be referred by the procuring activity to the appropriate departmental medical service who will act as an advisor to the procuring activity (see 6.5).3.3 Consistency a
24、nd flow: When tested as specified in 4.5.1, the remover shall flow to a point within 18 and 23 cms in five minutes.3.4 Flammability: When the remover is tested as specified in 4.5.2, it shall not continue to burn longer than 3 seconds after removal of the flame.3.5 Effect on metals: When the remover
25、 is tested as specified in 4.5.3 on the metals listed in table I (see 4.5.3.1), there shall be no discoloration or evidence of corrosion. Slight discoloration of cadmium plated steel panels shall not be considered objectionable.3.6 Rinsability: The remover, when tested as specified in 4.5.4, shall b
26、e rinsable with water. If residue or noticeable water break occurs it shall not adversely affect the drying or adhesion of an applied polyurethane system.3.7 Paint stripping efficiency: The remover, when tested as specified in 4.5.5, shall remove epoxy finish from all panels specified in table II (s
27、ee 4.5.5.1) better than the control formula product (see 4.5.5.2).AMS-R-81903 SAE AMS-R-81903- 5 -3.8 Refinishing properties of stripped surfaces: After the stripping operation specified in 4.5.5 has been completed, the remover shall leave a surface suitable for refinishing as described in 4.5.6.3.9
28、 Volatility: The volatility of the remover shall not exceed the volatility of distilled water when distilled water and the remover are tested as specified in 4.5.7.3.10 Storage stability: The remover shall conform to all requirements of this specification after 6 months storage at 21.1 2.8C (70 5F).
29、3.11 Service test: When required by the qualifying activity, the remover shall be tested as specified in 4.5.9 and shall show satisfactory performance in actual use.3.12 Workmanship: The remover, when examined visually at room temperature, shall be a homogeneous liquid that shows no caking, or gelat
30、ion.4. QUALITY ASSURANCE PROVISIONS: 4.1 Responsibility for inspection: Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract, the contractor may use his own or a
31、ny other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies an
32、d services conform to prescribed requirements.4.2 Classification of inspections: Inspection requirements specified herein are classified as follows:1. Qualification inspection (4.3).2. Quality conformance inspection (4.4).4.2.1 Inspection conditions: Unless otherwise specified, all inspections requi
33、red by this specification shall be performed at a temperature of 21.1 2.8C (70 5F) and relative humidity of 50 5 percent.AMS-R-81903 SAE AMS-R-81903- 6 -4.3 Qualification inspection: The qualification inspection shall consist of all the examinations and tests required under this specification.4.3.1
34、Retention of qualification: The retention of qualification of products approved for listing on the qualified products list (QPL) shall be accomplished by a periodic verification to determine continued compliance of a suppliers product with the requirements of this specification. The verification int
35、ervals shall not exceed two years. Unless otherwise specified by the activity responsible for the qualified products list, verification of qualification may be made by certification.4.3.2 Qualification samples: Qualification inspection samples shall consist of two gallons of remover contained in two
36、 one-gallon glass containers. Samples shall be forwarded to the Supply Officer, Naval Air Development Center, Warminster, Pennsylvania 18974, Attention: Director, Aircraft and Crew Systems Technology Directorate, Code 60622. Samples shall be plainly identified by securely attached durable tags with
37、the following information:Sample for qualification inspectionRemover, Acid Activated for Amine-Cured Epoxy Coating SystemsManufacturers formula No._Date compounded_Manufacturers nameBatch or lot numberSubmitted by (name) (date) for qualification inspection in accordance with the requirements of spec
38、ification MIL-R-81903A(AS) under authorization of (reference authorizing letter).4.3.2.1 Service test samples: Service test samples shall consist of 150 gallons of paint remover contained in thirty (5 gallon) steel pails conforming to PPP-P-704, Type I, Class 4. No overpacking is required. Samples s
39、hall be forwarded in accordance with instructions contained in the authorizing letter granting service test which will be sent to the manufacturer on satisfactory completion of all laboratory tests.4.3.2.2 Inspection report and other data: The contractor shall submit a report, in duplicate, to accom
40、pany the qualification inspection sample. This report shall include the results of the manufacturers tests, reported quantitatively, where applicable, in the units specified for all of the requirements specified herein. Tests not conducted due to lack of special test facilities or materials shall be
41、 so noted in the report. The contractor shall also furnish toxicological data necessary to evaluate the safety of the cleaning compound for the proposed use, and a certified statement specifically identifying each ingredient in the compound by a readily recognizable chemical name, source, and percen
42、tage by weight. Trade names alone will not be considered satisfactory. The formulation shall be clearly identified by the manufacturers formula number.4.3.3 Qualification tests: The qualification tests of the remover shall consist of all the tests required under this specification.AMS-R-81903 SAE AM
43、S-R-81903- 7 -4.4 Quality conformance inspection: The quality conformance inspection of the remover shall consist of the following tests:ConsistencyFlammabilityEffect on metalsPaint stripping efficiencyVolatilityRinsability4.4.1 Lot formation: A lot shall consist of all the coating remover produced
44、by one manufacturer, at one plant, form the same materials, and under essentially the same conditions provided the operation is continuous and does not exceed 24 hours. In the event the process is a batch operation, each batch shall constitute a lot (see 6.4).4.4.2 Quality conformance test samples:
45、Quality conformance test samples shall be selected in accordance with Fed. Test Method Std. No. 141, except that the sample shall consist of at least one gallon of remover. The applicable test methods of Fed. Test Method Std. No. 141 shall be used throughout this specification where test methods of
46、Fed. Test Method Std. No. 141 are specified. Each sample shall be clearly identified by the manufacturers formula number as specified in 4.3.2. The test samples shall be forwarded to the Naval Air Development Center as specified in 4.3.2. The manufacturer shall furnish with each lot a certificate to
47、 the effect that the material has been processed in the same manner and degree using the same base ingredients as the approved qualification sample.4.4.3 Packaging inspection: A random sample of filled containers shall be selected from each lot and inspected for fill, packing and marking. The sampli
48、ng shall be in accordance with MIL-STD-105, Inspection Level I and Acceptable Quality Level (AQL) 2.5 percent defective. The packing shall be in accordance with PPP-P-704 and the marking shall conform to the requirements of MIL-STD-129.4.5 Test methods: 4.5.1 Consistency and flow: The consistency an
49、d flow of the remover shall be determined with a Consistometer (Central Scientific Company Catalog No. 24925) or equivalent type instrument.4.5.2 Flammability: 4.5.2.1 Panel preparation: One end of a clean, 4 by 3/4 by 0.040 inch aluminum alloy panel, conforming to QQ-A-250/4 and anodized in accordance with MIL-A-8625, shall be held at an angle of approximately 45 degrees. The remover shall be poured along the upper edge of the panel, allowing the remover to d
