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 2015 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/AMSS4383B AEROSPACE MATERIAL SPECIFICATION AMS-S-4383 REV. B Issued 1999-07 Revis
5、ed 2015-07 Superseding AMS-S-4383A Sealing Compound, Topcoat, Fuel Tank Buna-N Type RATIONALE AMS-S-4383 Rev B incorporates changes to film thickness, non-volatile content (NVC), viscosity, and color leaching requirements (based on requirement for use of oil-soluble dye). These minor changes are bas
6、ed on input from all qualified product manufacturers and do not change the form, fit, or function of the sealant as currently employed. Widening the NVC envelope was formally approved when the specification was MIL-S-4383 but the change was never incorporated. Allowance for use of alternative dry fi
7、lm thickness measurement equipment has also been included. As one-component material, batch and lot are the same so Acceptance Tests are run only once consistent with other one-component sealant specifications. 1. SCOPE 1.1 Form This specification covers one type of one-component, air drying protect
8、ive coating which cures at room temperature. The topcoat compound covered by this specification shall be formulated from butadiene acrylonitrile copolymer and shall be colored red by the use of an oil soluble dye. 1.2 Application This material is a one part compound designed as topcoat or barrier co
9、ating for integral fuel tank sealants and coatings but usage is not limited to such applications. It may also be used for temporary repair of aircraft fuel tanks using a “fill-and-drain” technique. It may also be used as a bonding agent for materials such as synthetic rubber metals, glass, and many
10、plastics. 1.2.1 Notice The cured coating is resistant to exposure from both jet fuel and aviation gas; it is not suitable for use with motor fuels containing alcohols. 1.3 Safety Hazardous Materials Shall be in accordance with AS5502 (1.1). 2. APPLICABLE DOCUMENTS Shall be in accordance with AS5502
11、(Section 2). SAE INTERNATIONAL AMS-S-4383B Page 2 of 9 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AMS4049 Aluminum Alloy, Sheet and Plate, Alclad 5.
12、6Zn - 2.5Mg - 1.6Cu - 0.23Cr (Alclad 7075; -T6 Sheet - T651 Plate), Solution and Precipitation Heat Treated AMS-S-8802 Sealing Compound, Temperature Resistant, Integral Fuel Tanks and Fuel Cell Cavities, High Adhesion AS5127 Aerospace Standard Test Methods for Aerospace Sealants Methods for Preparin
13、g Aerospace Sealant Test specimens AS5127/1 Aerospace Standard Test Methods for Aerospace Sealants, Two-Component Synthetic Rubber Compounds AS5502 Standard Requirements for Aerospace Sealants and Adhesion Promoters SAE J1966 Lubricating Oils, Aircraft Piston Engine (Non-Dispersant Mineral Oil) 2.2
14、PRI Publications Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org. PD2000 Goverance and Administration of a Managed Product Qualification Program PD2001 Manufacturer Request for Product Approval and Qualification Proc
15、ess PD2103 Aerospace Quality Assurance, Product Standards, Qualification Procedure, Sealants PRI-QPL- AMS-S-4383 Products Qualified Under AMS-S-4383 2.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www
16、.astm.org. ASTM B36 Standard Specification for Brass Plate, Sheet, Strip, and Rolled Bar ASTM D130 Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test ASTM D381 Standard Test Method for Gum Content in Fuels by Jet Evaporation ASTM D471 Standards Test Method
17、for Rubber Property Effect of Liquids ASTM D1005 Standard Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers ASTM D4976 Standard Specification for Polyethylene Plastics Molding and Extrusion Materials 2.4 U.S. Government Publications Copies of these documents are
18、 available online at http:/quicksearch.dla.mil. CCC-C-432 Cloth, Sheeting, Cotton, (Unbleached, Bleached, and Dyed) MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156 SAE INTERNATIONAL AMS-S-4383B Page 3 of 9 3. TECHNICAL REQUIREMENTS 3.1 Materials The com
19、pound covered by this specification shall be formulated from butadiene acrylonitrile copolymer and shall be colored red by the use of an oil soluble dye. 3.2 Date of Packaging Shall be in accordance with AS5502 (3.1). 3.3 Toxicological Formulations Shall be in accordance with AS5502 (3.2). 3.4 Quali
20、ty Shall be in accordance with AS5502 (3.3). 3.5 Shelf Life Shall be a minimum of 6 months from date of packaging when stored below 80 F (27 C). Shelf life shall be a minimum of 6 months if calculated from date of shipment in accordance with individual manufacturer policies and warranties. Independe
21、nt of shelf life policy, every container shall clearly indicate start and/or expiration date of shelf life prior to shipment. Material may be tested for shelf life extension per 4.3.3. 3.6 Properties The compound shall conform to the requirements shown in Table 1 when determined in accordance with t
22、he specified test methods. SAE INTERNATIONAL AMS-S-4383B Page 4 of 9 Table 1 - Properties Paragraph Property Requirement Test Method 3.6.1 Nonvolatile Content, (by weight) 17 to 24% AS5127/1 (5.1) 3.6.2 Viscosity 250 to 2000 Centipoise (0.25 to 2.0 Pa-S) AS5127/1 (5.3) Use No.2 spindle at 10 rpm 3.6
23、.3 Tack Free Time, max 4 hours AMS-S-4383 (4.6.1) 3.6.4 Accelerated Storage Stability No greater than 10 percent viscosity change from original viscosity per 3.6.2. Topcoat material shall not separate or gel. AS5127/1 (9.1) 3.6.5 Working properties AMS-S-4383 (4.5.4) 3.6.5.1 Film Quality Brush and d
24、ip coats of the topcoat compound, shall be smooth, uniform, and free of sagging, bubbles, pinholes, cracks, and other film irregularities. 3.6.5.2 Film Thickness 0.0005 to 0.0030 inches (0.013 to 0.076 mm) ASTM D 1005, Procedure C and AMS-S-4383 (4.6.9) 3.6.5.3 Recoating A coat of the topcoat compou
25、nd when applied over a freshly dried film of topcoat compound and over a cured film of polysulfide sealing compound qualified to AMS-S-8802 shall show satisfactory bonding and no lifting, cracking, blistering, or loss of adhesion. 3.6.6 Peel Strength, min 5 pounds force/inch (875 N/m) on AMS4049 10
26、pounds force/inch (1750 N/m) on AMS-S-8802 AMS-S-4383, (4.6.8) and AS5127/1 (8.1) 3.6.7 Low Temperature Flexibility No visual evidence of cracking, checking, or loss of adhesion. AMS-S-4383 (4.6.2) and AS5127/1 (7.6) 3.6.8 Resistance to Heat No evidence of hardening, blistering, checking, cracking,
27、shrinkage, loss of adhesion, or loss of flexibility AMS-S-4383 (4.6.3) 3.6.11 Resistance to Salt Water and Hydrocarbons No evidence of softening, blistering, leaching, corrosion, or loss of adhesion. Color leaching into hydrocarbon is permitted. AMS-S-4383 (4.6.4) 3.6.12 Resistance to Hot Oil No evi
28、dence of cracking, flaking, or loss of adhesion. AMS-S-4383 (4.6.5) 3.6.13 Fuel Contamination 20 milligrams per 100 milliliters, max. No more than slight discoloration shall be present on a freshly polished copper strip. AMS-S-4383 (4.6.6) 3.6.14 Sealing Compound Protection No evidence of appreciabl
29、e leaching, change in hardness, flexibility, or signs of cracking in sealing compound. No evidence of cracking, checking, or loss of adhesion of topcoat compound. AMS-S-4383 (4.6.7) SAE INTERNATIONAL AMS-S-4383B Page 5 of 9 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection Shall be i
30、n accordance with AS5502 (4.1). 4.1.1 Sampling Shall be in accordance with AS5502 (4.3). 4.2 Classification of Tests Shall be in accordance with AS5502 (4.2). 4.2.1 Qualification Tests Shall be in accordance with AS5502 (4.2.1). 4.2.2 Acceptance Tests Requirements shown in Table 2 are acceptance tes
31、ts and shall be performed on each lot prior to final packaging. Table 2 - Acceptance tests Test Requirement Paragraph Nonvolatile Content 3.6.1 Viscosity 3.6.2 Tack Free Time 3.6.3 Film Quality 3.6.5.1 Peel Strength 3.6.6 4.3 Sampling and Testing Sampling shall be in accordance with AS5502 (4.3). 4.
32、3.1 Qualification Test Samples Sufficient material shall be supplied to perform all required tests. Samples shall be identified as: SEALING COMPOUND, TOPCOAT, FUEL TANK, BUNA-N TYPE AMS-S-4383B MANUFACTURERS IDENTIFICATION_ NAME OF MANUFACTURER_ LOT NUMBER_ DATE OF PACKAGING_ SHELF LIFE EXPIRATION D
33、ATE_ STORE PER MFG INSTRUCTIONS BELOW 80 F (27 C) 4.3.2 Acceptance Tests Shall be in accordance with AS5502 (4.3.1). 4.3.2.1 Batch and Lot A lot shall consist of all the topcoat compound produced by one supplier, at one plant, from the same materials, under essentially the same manufacturing conditi
34、ons. When the process is considered a batch operation, each batch shall constitute a lot. SAE INTERNATIONAL AMS-S-4383B Page 6 of 9 4.3.2.2 Lot Acceptance Tests Each lot shall be subjected to acceptance testing listed in Table 2 prior to final packaging. After successful completion of the acceptance
35、 tests, the lot shall be released for final packaging. 4.3.3 Shelf-Life Extensions 4.3.3.1 Sampling Shall be in accordance with AS5502 (4.3). 4.3.3.2 Shelf-Life Testing The testing to be conducted for shelf-life extension are listed in Table 3. Table 3 - Shelf-life testing Test Requirement Paragraph
36、 Nonvolatile Content 3.6.1 Viscosity 3.6.2 Tack Free Time 3.6.3 Film Quality 3.6.5.1 Peel Strength 3.6.6 4.3.3.3 Shelf-Life Extension Tests are to be conducted in accordance with test methods outlined herein for acceptance tests. If tests are being performed at the end of the stated shelf life to ex
37、tend the shelf-life of the topcoat compound and all tests are passed the shelf-life will be extended an additional four months. A maximum of three extensions are allowed. 4.4 Approval Shall be in accordance with AS5502 (4.4). 4.5 Test Methods 4.5.1 Standard Tolerances Unless otherwise specified here
38、in, standard tolerances of AS5127 (3) “Standard Tolerances” shall apply. 4.5.2 Standard Conditions Standard laboratory conditions shall be as specified in AS5127 (Section 4). 4.5.3 Preparation and Cleaning of Test Panels Test panels shall be prepared and cleaned in accordance with AS5127 (Section 6)
39、. 4.5.4 Application and Curing of Topcoat Compound Unless otherwise specified, the test panels shall be given a single dipcoat of the topcoat compound to produce a film having a thickness of 0.0005 to 0.0030 inches (0.013 to 0.076 mm) when cured. The solids content of the topcoat compound shall be w
40、ithin the range of 17 to 24 percent. The coated panels shall be cured by suspending or placing vertically for a period of 48 hours at standard conditions (4.5.2) in a draft-free enclosure such as a ventilated unheated laboratory oven to reduce the tendency of blister formation. SAE INTERNATIONAL AMS
41、-S-4383B Page 7 of 9 4.6 Test Procedures Standard Test methods are in accordance with AS5127 and AS5127/1. In the event of a conflict between the text of this document and AS5127 and/or AS5127/1, the text of this document takes precedence. 4.6.1 Tack Free Time A coat of the topcoat compound shall be
42、 applied to a 0.032 x 1 x 6 inch (0.8 x 25 x 152 mm) bare metal panel conforming to AMS4049 and to a panel which has been coated with a polysulfide sealing compound qualified to AMS-S-8802 and cured in accordance with manufacturers instructions. The coated panels shall then be suspended from a suita
43、ble rack at standard conditions for 4 hours. A 1 x 7 inch (25 x 178 mm) strip of low density polyethylene film (ASTM D4976 or equivalent) 0.005 inch 0.002 (0.13 mm 0.05) thick shall be applied to the topcoat compound and held in place at a pressure of approximately 0.5 ounce per square inch (0.0002
44、N/mm2) for 2 minutes 10 seconds. The strips shall then be slowly and evenly peeled back at right angles to the topcoat compound surface. The polyethylene film shall come away clean and free of topcoat compound. 4.6.2 Low Temperature Flexibility Six AMS4049 aluminum panels, measuring 0.020 x 1 x 6 in
45、ch (0.51 x 25 x 152 mm), shall be used for this test. Four of the panels shall be coated with a polysulfide sealant compound qualified to AMS-S-8802 and cured in accordance with manufacturers instructions. The cured thickness of the polysulfide sealing compound shall be 0.125 inch (3.17 mm). Two of
46、these coated panels and the two bare panels shall be coated with the topcoat compound and cured in accordance with 4.5.4. All six panels shall then be immersed for 48 hours at 120 F (49 C) in test fluid conforming to ASTM D471, Reference Fuel B. After conditioning, the panels shall be tested in acco
47、rdance with AS5127/1 (7.6). The two panels coated with polysulfide sealant, which were not topcoated, shall be considered as control panels to insure that any failure is not due to failure in the polysulfide sealing compound. 4.6.3 Resistance to Heat Six AMS4049 aluminum panels, measuring 0.032 x 1
48、x 6 inch (0.8 x 25 x 152 mm), shall be used for this test. Four parallel fillets, measuring 0.19 x 0.5 x 2 inch (4.8 x 13 x 51 mm), of polysulfide sealant compound qualified to AMS-S-8802 and cured in accordance with manufacturers instructions shall be applied to each panel. Two of these panels and the two bare panels shall be coated with the topcoat compou
