NAVY MIL-PRF-32440-2013 COATINGS CHIP-RESISTANT.pdf

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1、Comments, suggestions, or questions on this document should be addressed to the Marine Corps Systems Command, ATTN: SIAT - PM-CPAC, 2200 Lester Street, Quantico, VA 22134 or emailed to commandstandardsnavy.mil. Since contact information can change, you may want to verify the currency of this address

2、 information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 8010 INCH-POUND MIL-PRF-32440 28 February 2013 PERFORMANCE SPECIFICATION COATINGS, CHIP-RESISTANT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Sco

3、pe. This specification covers chip-resistant coatings for use on areas of military vehicles or ground support equipment which may encounter wear and abrasion. Examples of subject areas are bed liners and cargo beds of trucks, undercarriages of ground support equipment, and other areas subject to abr

4、asion and wear, which may abrade original equipment manufacturer (OEM) and traditional coatings. 1.2 Classification. Chip-resistant coatings are of the following types as specified (see 6.2). a. Type I. 100 percent solids, two-component lining (polyurethane, polyurea, hybrid polyurethane/polyurea) f

5、or primary use in plural component spray equipment for a rapid return-to-service. b. Type II. 100 percent solids, two-component lining (polyurethane, polyurea, hybrid polyurethane/polyurea) for primary use in touch-up or seam sealing applications for shop and field use. 2. APPLICABLE DOCUMENTS 2.1 G

6、eneral. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the comp

7、leteness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications,

8、standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL STANDARDS FED-STD-595 - Colors Used in Government Procurement FED-STD-595/27038 - Miscellaneous Fla

9、t or Lusterless (Black) DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-53030 - Primer Coating, Epoxy, Water Based, Lead and Chromate Free MIL-DTL-64159 - Camouflage Coating, Water Dispersible Aliphatic Polyurethane, Chemical Agent Resistant (Copies of these documents are available online at http:/quic

10、ksearch.dla.mil/ or https:/assist.dla.mil.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are th

11、ose cited in the solicitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32440 2 CODE OF FEDERAL REGULATIONS (CFR) 49 CFR 571, Standard No. 302 - Flammability of Interior Materials Passenger Cars, Multipurpose Passenger Vehi

12、cles, Trucks, and Buses (Copies of this document are available from the Superintendent of Documents, U.S. Government Printing Office, Washington DC 20401 or online at http:/www.ecfr.gov.) UNITED STATES MARINE CORPS TECHNICAL MANUALS TM 4750/-OD/1 - Paint, Coating, Underbody and Registration Marking

13、for Marine Corps Combat and Tactical Equipment (Copies of this document are available online at the Marine Corps Publications website at https:/pubs.ala.usmc.mil/front.htm or by emailing commandstandardsnavy.mil.) 2.3 Non-Government publications. The following documents form a part of this document

14、to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM D412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers Tension ASTM D522 - Standard Test Methods for Mandrel Ben

15、d Test of Attached Organic Coatings ASTM D570 - Standard Test Method for Water Absorption of Plastics ASTM D610 - Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces ASTM D714 - Standard Test Method for Evaluating Degree of Blistering of Paints ASTM D882 - Standard Test Meth

16、od for Tensile Properties of Thin Plastic Sheeting ASTM D1141 - Standard Practice for the Preparation of Substitute Ocean Water ASTM D1654 - Standard Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments ASTM D1729 - Standard Practice for Visual Appraisal of C

17、olors and Color Differences of Diffusely-Illuminated Opaque Materials ASTM D2240 - Standard Test Method for Rubber Property Durometer Hardness ASTM D2794 - Standard Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact) ASTM D3170 - Standard Test Method for Chipp

18、ing Resistance of Coatings ASTM D3359 - Standard Test Methods for Measuring Adhesion by Tape Test ASTM D4060 - Standard Test Method for the Abrasion Resistance of Organic Coatings by the Taber Abraser ASTM D4541 - Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers

19、 ASTM D5402 - Standard Practice for Assessing the Solvent Resistance of Organic Coatings Using Solvent Rubs Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32440 3 (Copies of these documents are available from ASTM International, 100 Barr Har

20、bor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) GENERAL MOTORS CORPORATION GMW14872 - Cyclic Corrosion Laboratory Test (Copies of this document are available from General Motors Corporation c/o Global Engineering Documents, 15 Inverness Way East, Inglewood, CO 80

21、112.) SAE INTERNATIONAL SAE J400 - Test for Chip Resistance of Surface Coatings (Copies of this document are available from SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001 or online at www.sae.org.) SOCIETY FOR PROTECTIVE COATINGS (SSPC) SSPC SP-1 - Solvent Cleaning SSPC PA

22、-2 - Measurement of Dry Coating Thickness with Magnetic Gages (Copies of these documents are available from SSPC Publication Sales, 40 24th Street, 6th Floor, Pittsburgh, PA 15222-4656 or online at www.sspc.org.) UNDERWRITERS LABORATORIES, INC. (UL) UL 94 - Standard for Tests for Flammability of Pla

23、stic Materials for Parts in Devices and Appliances (Copies of this document are available from COMM 2000, 151 Eastern Avenue, Bensenville, IL 60106 or online at m-.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this documen

24、t 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 exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. Coatings furnished under this specification shall be products

25、 that are authorized by the qualifying activity for listing on the applicable qualified products list before contract award (see 4.2 and 6.3). 3.2 Materials. The resin and isocyanate components furnished under this specification, when mixed and applied in accordance with the manufacturers instructio

26、ns, shall produce a chip-resistant coating that satisfies all of the requirements of this specification. The composition of the coatings/compounds furnished under this specification shall be the responsibility of the manufacturer, except as limited by this specification. 3.2.1 Recycled, recovered, o

27、r environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.2.2

28、 Materials dispensing. Type I materials shall be sprayable using standard plural component equipment equipped with in-line heaters (see 3.3.19 and 4.4.20). Type II materials shall be applied by cartridge or trowel for repair and touch-up applications (see 3.3.17, 3.3.18, 4.4.18, and 4.4.19). 3.2.3 C

29、hemical composition. The chip-resistant coating shall consist of a resin component and an isocyanate component. The two components cure through an exothermic reaction to form an elastomeric barrier coating which shall meet the zero volatile organic compound (VOC) requirements (see 4.4.1) and be comp

30、atible with the chemical agent resistant coating (CARC) primers and topcoats (see 3.3.4 and 4.4.6) in accordance with the USMC Painting Technical Manual 4750-OD/1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32440 4 3.2.3.1 Base component

31、. Types I and II coatings shall contain a polyether-polyol based resin blend, polyamine or polyetheramine-based resin blend, or a combination of the two (for hybrid systems). The base resin can be aliphatic or aromatic in nature. The polymeric resin used in Type I and II base components shall be 100

32、 percent solids. 3.2.3.2 Isocyanate component. Types I and II material shall be methylene di-isocyanate (MDI) or its most common isomers 2,2, 2,4, and 4,4 MDI or hexa-methylene di-isocyanate (HDI). Regardless of chemistry, the coating cannot contain any hazardous toluene di-isocyanate (TDI) or more

33、than 0.5 percent free monomers of MDI or its most common isomers 2,2, 2,4, and 4,4 MDI or free monomers of HDI. The coating shall be aromatic or aliphatic in nature. The polymeric resin used in Type I and II isocyanate components shall be 100 percent solids. 3.2.3.3 Characteristics of the mixed comp

34、onents. The characteristics of the mixed components (base and isocyanate) shall meet the requirements of 3.3. 3.2.4. Storage stability. 3.2.4.1 Accelerated storage stability. When tested as specified in 4.4.2.1, the two individual components of the final product shall show no curdling or hardening,

35、and any sedimentation or material separation shall be easily mixed back into a smooth homogeneous state. After the specified conditioning period, the admixed coating shall meet the requirements for solvent resistance (see 3.3.13), hardness (see 3.3.14), gel time (see 3.3.17), tack-free time (see 3.3

36、.18), and application properties (see 3.3.19). 3.2.4.2 Long term storage stability. When tested as specified in 4.4.2.2, the two individual components of the final product shall show no curdling or hardening, and any sedimentation or material separation shall be easily mixed back into a smooth homog

37、eneous state. After the specified conditioning period, the admixed coating shall meet all the requirements of this specification. 3.2.5 Toxicity. When evaluated in accordance with 4.4.14 the Health Hazard Assessment (HHA), the coating shall have no adverse effect on the health of personnel when used

38、 for its intended purpose (see 4.4.14 and 6.4). 3.3 Performance. The performance of the sprayed coating (Type I) and repair compound (Type II) shall be as follows. 3.3.1 Color. The sprayed-on coating (Type I) and repair compound (Type II) shall be in accordance with FED-STD-595, as specified (see 6.

39、2). Property values listed in this specification are tested to black color 27038. 3.3.2 Flame resistance. The coating shall be flame resistant when evaluated in accordance with 4.4.4. 3.3.3 Adhesion to steel and aluminum. 3.3.3.1 Type I. The pull-off adhesion after 24 hours cure shall be minimum 200

40、0 pounds per square inch (psi) when tested in accordance with 4.4.5. X-cut tape adhesion shall have a rating of 5A over steel and aluminum as measured in accordance with 4.4.5. 3.3.3.2 Type II. The pull-off adhesion after 24 hours cure shall be minimum 2000 psi, in accordance with 4.4.5, depending o

41、n substrate. X-cut tape adhesion shall have a rating of 5A over steel and other suitable substrates as measured in accordance with 4.4.5. 3.3.4 CARC overcoat adhesion. CARC topcoat shall show good adhesion and compatibility when applied over cured Type I sprayed chip-resistant coating and Type II re

42、pair chip-resistant compound, when prepared and tested as specified in 4.4.6. The appearance of the CARC shall not delaminate, wrinkle, or show evidence of holidays after being applied to the Type I and Type II compounds. Adhesion shall be 4A or better when tested in accordance with 4.4.6. 3.3.5 Ope

43、rational temperature range. The operational temperature range required shall be -40 to +180 F for both Type I coatings and Type II repair compounds for continual exposure (see 4.3.7, 4.4.7, 4.4.8, and 4.4.10). 3.3.6 Chip resistance. The coating shall not display evidence of any penetration to alumin

44、um or steel substrates when tested as specified in 4.4.7 and prepared in accordance with 4.3.5. This is equivalent to a Rating 10 in accordance with visual standards of ASTM D3170, section 8. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32

45、440 5 3.3.7 Impact resistance. The coating shall exhibit no cracking when tested using the 0.625-inch hemispherical head steel punch at 50 inch-pounds direct and at 25 inch-pounds reverse impact in accordance with 4.4.8. 3.3.8 Mandrel flexibility. A 0.050-inch free-film of both Type I and Type II ma

46、terial shall demonstrate no cracking, crazing, or deformation when bent over a 0.25-inch mandrel when prepared in accordance with 4.3.6 and tested in accordance with 4.4.9. 3.3.9 Tensile and flexural properties. 3.3.9.1 Flexural modulus. The flexural modulus for both Types I and II shall be a minimu

47、m of 900 psi when prepared as in 4.3.6 and tested in accordance with 4.4.10. 3.3.9.2 Elongation. The elongation shall meet 180 to 400 percent when prepared in accordance with 4.3.6 and tested in accordance with 4.4.10. 3.3.9.3 Tensile strength. The tensile strength for Type I and II coatings shall b

48、e 1200 psi minimum when prepared in accordance with 4.3.6 and tested in accordance with 4.4.10. 3.3.10 Accelerated corrosion. When tested in accordance with 4.4.11, and when applied to both steel and aluminum, both Types I and II shall have: a. A scribe creep rating of 9 in accordance with ASTM D165

49、4, Procedure A, b. A rust grade rating of 10 in accordance with ASTM D610, and c. A blistering size rating of 10 in accordance with ASTM D714. Both Types I and II shall exhibit no scribe creep, no corrosion and no undercutting away from the scribe, and no blistering. 3.3.11 Appearance. When evaluated in accordance with 4.4.20, the cured coating shall have a uniform surface texture, free of sags, pits, blisters, or visual defects. The cured co