ARMY MIL-C-47244 A-1990 COATING ABLATIVE RESISTANT《防烧蚀涂层》.pdf
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1、MIL-C- 4 72 4 4A (MI) 30 October 1990 SUPERSEDING MIL-C-47244 (MI) 26 July 1974 MILITUY SPECIFICATION COATING, ABLATIVE RESISTANT This specification is approved for use by the U.S. Army Missile Command, Department of the Army, and is available for use by all Departments and Agencies of the Departmen
2、t of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for a two- component, room temperature curing, filled, thermosetting, modified epoxy resin system that resists abrasion and erosion at extreme temperatures. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specificat
3、ions, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standar
4、ds (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, U.S. Army Missile Command, ATTN: AMSMI-RD-SE-TD- ST, Redstone
5、Arsenal, AL 35898-5270 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8030 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or net
6、working permitted without license from IHS-,-,-SPECIFICATIONS FEDERAL QQ-A-250/12 - TT-S-735 - PPP-c-2020 - MILITARY MIL-H-5606 - MIL-R-6855 - MIL-P-47215 - STANDARDS MILITARY MIL-STD-129 - (Unless otherwise indicated, r e* MIL-C-47244A 80 7799306 045b5Lb 7 M MIL-C-47244A (MI) Aluminum Alloy 7075, P
7、late and Sheet Standard Test Fluids, Hydrocarbon Chemicals, Liquid, Dry and Paste: Packaging of Hydraulic Fluid, Petroleum Base: Aircraft, Missile and Ordnance Rubber, Synthetic Sheets, Strips, Molded or Extruded Shapes, General Specification for Primer, Ablative Resistant Coating Marking for Shipme
8、nt and Storage copies of the federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Ave., Philadelphia, PA 19111-5094.) 2.2 Non-Government publications. The following documents form a part of this document to t
9、he extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the s
10、olicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS ASTM D 568 - Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Flexible Plastics in a Vertical Position ASTM D 740 - Standard Specification for Methyl Ethyl Ketone ASTM D 792 - Standard Test Methods for Spe
11、cific Gravity (Relative Density) and Density of Plastics by Displacement ASTM D 2240 - Standard Test Method for Rubber Property - Durometer Hardness 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47244A (MI) (Application for copies should be
12、 addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These documents also may be available in or through librar
13、ies or other informational services. ) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific ex
14、emption has been obtained. 3. REQUIREMENTS 3.1 First article sample. When required (see 6.21, a sample shall be subjected to first article inspection (see 6.3) in accordance with Section 4. 3.2 Material. The material shall be a two-component, room-temperature curing, filled, thermosetting, modified
15、epoxy resin system. The resin system is formulated by mixing a base resin and a curing agent as instructed by the manufacturer. 3.3 Physical properties. 3.3.1 Appearance. The cured resin system shall be continuous and uniform in texture. The color shall not vary from lot to lot. e 3.3.2 Specific gra
16、vity. The specific gravity of the cured resin system shall be not less than 1.2 nor more than 1.6. 3.3.3 Application time. The application time of the uncured resin system shall be not less than 60 minutes at room temperature, defined as 25O 2 3O Celsius (Cl. 3.3.4 Flow, The flow of the freshly mixe
17、d resin system shall be not more than 0.3 inch when a cylindrical section approximately 0.375 inch high and 1.50 inch in diameter is allowed to flow under its own weight on a vertical surface. In addition, the resin system shall retain a flow not more than 0.30 inch throughout the entire application
18、 time. 3.3.5 Hardness. Hardness of the cured resin system shall be as specified in table I. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47244A (MI) Curing conditions Cond 1: Room temperature for 24 i 2 hours Cond 2: Room temperature for 7
19、 days Cond 3: Room temperature for 3 hours, followed by 66 5 1C for 3 hours, followed by room temperature for not less than 3 hours. TABLE I. Hardness requirements. Hardness value Not less than 40 Shore D Not less than 55 Shore D Not less than 55 Shore D 3.3.7 Humidity and heat resistance. The cured
20、 resin system shall withstand simultaneous exposure to a relative humidity of not less than 90 percent and temperature cycling as follows: a. A temperature of 49 f. 3C for 3 days b. Returned in not less than 3 hours to -125 3C and maintained at this temperature for not less than 30 minutes c. Uncont
21、rolled stabilization at room temperature d. Increase to 885 3C in not less than 50 minutes, and maintained at this temperature for 4 hours. No softening, sponging, blistering, checking, shrinking, or loss of adhesion shall occur. Weight of the resin system shall not increase more than 5 percent. t.h
22、an 5 percent. Thickness of the resin system shall not increase or decrease more 3.3.8 Tread resistance. The cured resin system, after continuous exposure for 72 hours (minimum) to a temperature of 882 3C, shall show no evidence of surface degradation or loss of adhesion as a result of foot traffic .
23、 3.3.9 Low temperature impact resistance. The cured resin system, when stabilized at. the temperature specified in 3.3.6, shall not shatter when impacted by a 0.5 pound steel ball dropped from heights up to 20 feet. 3.3.10 Flammability. The cured resin system shall be self extinguishing. 4 Provided
24、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C- 472 4 4A (MI ) 3.3.11 Hydrocarbon resistance. The cured resin system shall not have any loss of adhesion or be adversely affected after exposure to hydrocarbons. The hydrocarbon-exposed resin system shall
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