1、 INCH-POUND13 August 2013 SUPERSEDING MIL-DTL-14072E 31 May 2007 DETAIL SPECIFICATION FINISHES FOR GROUND BASED ELECTRONIC EQUIPMENT This specification is approved for use by the Department of the Army and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.
2、1 Scope. This specification covers requirements for finishes necessary to protect ground electronic equipment from the deteriorating effects of climatic conditions encountered in military use. 1.2 Conditions and applicability. When it is felt that the finish requirements of this document may comprom
3、ise the performance of the equipment, the designer should consider other possibilities, such as the use of compatible, inherently corrosion-resistant materials. For example, heat dissipation requirements of equipment may require special consideration to provide for optimum thermal conductivity. In s
4、uch a case, the use of castings, welded pieces, clad metals, etc., which reduce the number of interfaces may be satisfactory. A prudent choice of materials in the design stage will result in fewer finishing, corrosion, and environmental problems. 1.3 ClassificationAMSC N/A FSC MFFP DISTRIBUTION STAT
5、EMENT A. Approved for public release, distribution is unlimited. Comments, suggestions, or questions on this document should be addressed to: US Army Communications-Electronics Command ATTN: RDER-PRO, Aberdeen Proving Ground, MD 21005 or emailed to george.a.tanner.civmail.mil. Since contact informat
6、ion can change you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil.MIL-DTL-14072FProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-2 Type I (Exposed). Type I surfaces are areas, eith
7、er exposed to view when equipment is in operating or traveling condition, or areas not exposed to view but subject to combined direct action of climatic elements. Climatic elements include temperature extremes, humidity extremes, rain, hail, snow, sleet, salt-laden air, industrial atmospheres, direc
8、t solar radiation, dust, and wind blown sand. For example, the outside surfaces of any equipment are Type I areas; the inside surfaces of an open frame motor are Type I areas. Type II (Sheltered). Type II surfaces are areas not exposed to view during equipment operation and not subject to direct act
9、ion of rain, hail, snow, sleet, direct solar radiation, and sand. For example, the interior surfaces of a radio receiver or switchboard are considered Type II areas. Any Type I finish is adequate protection for Type II exposures. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this sect
10、ion 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 completeness of this list, document users are
11、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, standards, and handbooks form a part of thi
12、s document to the extent specified herein. Unless otherwise specified, the issues of these documents are be those cited in the solicitation or contract. FEDERAL SPECIFICATIONS A-A-59298 - Tape, Pressure Sensitive Adhesive A-A-59313 - Thread Compound, Antiseize, Zinc, Dust-Petrolatum TT-C-490 - Chemi
13、cal Conversion Coatings and Pretreatments for Ferrous Surfaces (Base for Organic Coatings). TT-P-28 - Paint, Aluminum, Heat Resisting (1200F). TT-P-1757 - Primer Coating, Alkyd Base, One Component. MIL-DTL-14072F Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
14、om IHS-,-,-3 DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-F-495 - Finish, Chemical, Black, for Copper Alloys. MIL-DTL-5541 - Chemical Conversion Coatings on Aluminum and Aluminum Alloys. MIL-A-8625 - Anodic Coatings for Aluminum and Aluminum Alloys. MIL-C-10578 (Inactive) - Corrosion Removing and Metal
15、Conditioning compound (Phosphoric Acid Base). MIL-L-13808 - Lead Plating, Electrodeposited. MIL-PRF-14105 - Paint, Heat-Resisting (For Steel Surfaces). MIL- DTL-15090 - Enamel, Equipment, Light Gray (Navy Formula No. 111). DOD-P-15328 - Primer (Wash), Pretreatment (Formula No. 117 for Metals). MIL-D
16、TL-16232 Phosphate Coating, Heavy, Manganese or Zinc Base MIL- PRF-22750 - Coating, Epoxy High-Solids. MIL-PRF-23377 - Primer Coatings, Epoxy High-Solids. A-A-59921 - Cleaning Compounds, Aircraft Surface. MIL-R-46085 - Rhodium Plating, Electrodeposited. MIL-E-52891 (Inactive) - Enamel, Lusterless, Z
17、inc Phosphate, Styrenated Alkyd Type MIL-DTL-53022 - Primer, Epoxy Coating, Corrosion Inhibiting, Lead and Chromate Free. MIL-DTL-53030 - Primer Coating, Epoxy, Water Reducible, Lead and Chromate Free. MIL-DTL-53039 - Coating, Aliphatic Polyurethane, Single Component, Chemical Agent Resistant. MIL-D
18、TL-53084 - Primer, Cathodic Electordeposition, Chemical Agent Resistant. MIL-R-81294 (Inactive) - Remover, Paint, Epoxy, Polysulfide and Polyurethane Systems. MIL- PRF-81733 - Sealing and Coating Compound, Corrosion Inhibitive. MIL-PRF-85582 - Primer Coatings: Epoxy, Waterborne. MIL-C-87115 (Inactiv
19、e) - Coating, Immersion Zinc Flake/Chromate Dispersion. MIL-DTL-14072F Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 FEDERAL STANDARDS FED-STD-595 - Colors (Chip Numbers 14084, 16376, 17038, 24084, 24410, 24533, 26152, 26307, 27038, 27875, 30051,
20、 33446, 34088, 34094, 36118, 27875). DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1500 (Inactive) - Cadmium-titanium Plating, Low Embrittlement, Electrodeposition. MIL-STD-1501 - Chromium Plating, Low Embrittlement, Electrodeposition. (Copies of these documents are available online at http: /quicksearch.
21、dla.mil or from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are
22、 those cited in the solicitation or contract. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A123/A123M - Zinc (Hot Dip Galvanized) Coatings on Iron and Steel Products, Standard Specification for. ASTM A153/A153M - Standard Specification for Zinc Coating (Hot Dip) on Iron and Steel Hardware.
23、 ASTM B253 - Standard Guide for Preparation of Aluminum Alloys for Electroplating ASTM A380 - Standard Practice for Cleaning, Descaling and Passivation of Stainless Steel Parts, Equipment and Systems. ASTM B488 - Standard Specification for Electrodeposited Coatings of Gold for Engineering Uses. ASTM
24、 B545 - Standard Specification for Electrodeposited Coatings of Tin ASTM B579 - Standard Specification for Electrodeposited Coatings of Tin-lead Alloy, (Solder Plate). ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc On Iron and Steel. ASTM B700 - Standard Specification for E
25、lectrodeposited Coatings of Silver for Engineering Use. ASTM D1732 - Standard Practices for Preparation of Magnesium Alloy Surfaces for Painting. ASTM D6386 - Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Painting MIL-DTL-14072F Provided by IHSNot f
26、or ResaleNo reproduction or networking permitted without license from IHS-,-,-5 (Copies of these documents are available from www.astm.org or the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES (IPC) IPC-J-STD-
27、004 - Requirements for Soldering Fluxes. IPC-J-STD-005 - Requirements for Soldering Pastes. IPC-J-STD-006 - Requirements for Electronic Grade Solder Alloys and Fluxed and Non-Fluxed Solid Solders for Electronic Soldering Applications. (Copies of these documents are available from www.ipc.org or the
28、Association Connecting Electronics Industries, 3000 Lakeside Drive, Suite 309S, Bannockburn, IL 60015) MASTER PAINTERS INSTITUTE Reference No. 9 - Exterior Alkyd Enamel, Gloss, MPI Gloss Level 6. Reference No. 19 - Inorganic Zinc Rich Primer. Reference No. 47 - Interior Alkyd, Semi-Gloss, MPI Gloss
29、Level 5. Reference No. 49 - Interior Alkyd, Flat, MPI Gloss Level 1. (Copies of these documents are available from or the Master Painters Institute (HQ), 4090 Graveley Street, Burnaby, British Columbia, Canada, V5C 3T6) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) SAE-AMS-2403 - Plating, Nickel, General P
30、urpose. SAE-AMS-2418 - Plating, Copper SAE-AMS-2422 - Plating, Gold SAE-AMS-3276 - Sealing Compound, Integral Fuel Tanks and General Purpose, Intermittent Use to 360F (182C). SAE-AMS-M-3171 - Magnesium Alloy, Processes for Pretreatment and Prevention of Corrosion on SAE-AMS-S-8802 - Sealing Compound
31、, Temperature-Resistant, Integral Fuel Tanks and Fuel Cell Cavities, High Adhesion SAE AMS-2404 - Plating, Electroless Nickel SAE-AMS-P-81728 - Plating, Tin-Lead (Electrodeposited). SAE-AMS-QQ-C-320 - Chromium Plating (Electrodeposited). SAE-AMS-QQ-P-416 - Plating, Cadmium (Electrodeposited). MIL-DT
32、L-14072F Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-6 (Copies of these documents are available from www.sae.org or SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) SOCIETY OF PROTECTIVE COATINGS SSPC Paint 25 - Zinc Ox
33、ide, Alkyd, Raw Linseed Oil, Primer, and Primer, for Use Over Hand Cleaned Steel. SSPC Paint 30 - Weld-Through Inorganic Zinc Primer (Copies of these documents are available from http:/www.sspc.org or The Society for Protective Coatings, 40 24thStreet 6thFloor, Pittsburgh, PA 15222-4656. ). 2.4 Orde
34、r 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 exemption has been obtained. 3. REQUIREMENTS 3.1
35、General. Selection of finishes shall be in accordance with the requirements contained herein. Finishes selected shall conform to the specified thickness and shall not interfere with the performance requirements of the equipment. Finishes, applied in accordance with this specification, will inhibit t
36、he corrosion of metals and deterioration of wood. 3.2 First article. The contractor shall furnish a sample unit(s) for first article inspection of finishes as specified in the part or equipment document. 3.3 Materials. Finishing materials shall be in accordance with the requirements specified herein
37、. The contractor shall have in his possession, for examination by the contracting officer or his duly authorized representative, satisfactory evidence that materials used on the order comply with this specification. 3.4 Substitution for specified finishes, processes, or materials. If, due to special
38、 conditions of service or design, the contractor considers that finishes, processes, or materials other than those specified herein are necessary or more suitable, such finishes, processes, or materials shall be used only upon receipt of prior approval from the contracting officer. At the discretion
39、 of the contracting officer, samples may be required to demonstrate the suitability of proposed substitutes. 3.4.1 “P” finishes on ferrous alloys. Table I permits finishes on ferrous alloys (other than corrosion-resistant steels) when tank phosphating is not practical. Phosphating in a tank may not
40、be practical due to size, shape, or part fabrication method such as welding. Prior to using these finishes, the contractor shall prove, to the satisfaction of the contracting officer, that tank phosphating is not practical. MIL-DTL-14072F Provided by IHSNot for ResaleNo reproduction or networking pe
41、rmitted without license from IHS-,-,-7 3.4.2 Plating of holes and recesses. When it is not practicable to meet specific thickness requirements for finishes in holes or other recesses, the contractor shall submit a proposal for finishing such holes and recesses for review and approval by the contract
42、ing officer. 3.5 Operations prior to application of finishes. 3.5.1 Cut edges. The edges of all metals in exterior locations shall be rounded to promote adhesion and adequate thickness of subsequently applied paint. This is not possible over sharp edges. After rounding edges, applicable pretreatment
43、 coats shall be applied (Table I). Rounding to a radius of approximately 3.18 mm shall be accomplished prior to electroplating to improve plating at edge areas. 3.5.2 Defect repair. The use of any material(s) for the purpose of filling or sealing nicks, dents, gouges and poor joints is prohibited. 3
44、.5.3 Masking. Prior to painting base metal parts containing areas specifically intended for electrical contact or heat transmission, these areas shall be masked off or otherwise protected during finishing. Unless otherwise specified, plastics, rubber, fabrics and working parts of machinery shall als
45、o be masked off or otherwise protected. When masking tape is used, it shall be a type which will not adversely affect the finish or the equipment. 3.5.4 Preparatory cleaning. Prior to application of any finish, all surfaces shall be precleaned to remove dirt, grease, oil, solder flux, welding flux,
46、sand, visible rust, scale or oxides and all other contaminants that might interfere with the adhesion of the surface treatment, underplate or final finish. Cleaning shall be done immediately before the finishing operation. If this is not feasible, suitable precautions shall be taken to insure cleanl
47、iness during the period between cleaning, plating or other finishing process. Multiple cleaning methods may be required to maximize adhesion properties. 3.5.4.1 Blasting. If an abrasive blasting is necessary to clean near critical areas having a special surface finish requirement, such areas must be
48、 protected from the abrasive. Blasting shall not be used on surfaces which might be damaged, i.e. machine parts and sheet metal thinner than 1.59 mm (16 gage). 3.5.4.2 Cleaning of aluminum shelters. Aluminum shelters shall be cleaned in accordance with A-A-59921. 3.5.4.3 Cleaning of welded sections. Black iron oxide formed by welding operation shall be removed by blasting. Any residual blasting material shall be removed and the metal surface treated with a phosphoric acid etch per MIL-C-10578. This will remove and neutralize residual alkaline weld flux slags. MIL-DTL-14072F Provided by
