NAVY MIL-DTL-18001 L-2013 ANODES SACRIFICIAL ZINC ALLOY.pdf

1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact

2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5342 INCH-POUND MIL-DTL-18001L 3 December 2013 SUPERSEDING MIL-A-18001K w/INT. AMENDMENT 3 24 October 2007 MIL-A-18001K 16 December 1991 DET

3、AIL SPECIFICATION ANODES, SACRIFICIAL ZINC ALLOY This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for zinc anodes (galvanic protectors) in the form of plates, slabs, discs, and rods for

4、 corrosion protection (cathodic protection) of metals and alloys. It also includes features of anode design and fabrication, such as cast-in cores for mounting purposes. The material described by this specification contains elements for which the Occupational Safety and Health Administration (OSHA)

5、has set standards for exposure limits. Handling, storage, and application of this material should be in accordance with the 29 CFR 1910 and 1915 and any other safety and health regulations (local or otherwise) which may apply. 1.2 Classification. The anodes are of the following classes, types, and s

6、tyles, as specified (see 6.2). 1.2.1 Class 1 cast-in cores. Type ZHS Zinc, hull slab (steel straps) (23- and 42-pound sizes). Type ZHB Zinc, hull slab (brass straps) (23-pound size). Type ZHC Zinc, hull slab (core straps) (23- and 42-pound sizes). Type ZSS Zinc, submarine slab (steel strap) (12- and

7、 24-pound sizes). Type ZTS Zinc, teardrop shape (steel strap) (5-pound size). Type ZEP Zinc, fairwater slab (pipe core or pipe bushing core). Style A Square slab (9-pound size). Style B Circular slab (various sizes). Style C Semi-circular slab (23-pound size). Type ZBP Zinc, bar (pipe core) (8-pound

8、 size). Type ZBS Zinc, bar (steel straps) (8.5-pound size). Type ZDM Zinc, segmented disc (machine-formed interlocking core). Type ZMP Zinc, mooring chain (pipe core or pipe bushing core) (various sizes). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,

9、-,-MIL-DTL-18001L 2 1.2.2 Class 2 plain, no cores. Type ZRN Zinc, rod, no core, extruded, drawn or rolled. Type ZPN Zinc, plate, no core, rolled. 1.3 Key to symbols. The letter designations for the types of anodes are shown in table I. TABLE I. Letter designations of anode types. First letter (desig

10、nates anode metal) Second letter (designates shape or general use) Third letter (designates core) Z - (zinc) H - (hull slab) B - (brass straps) S - (submarine slab) S - (steel strap) T - (teardrop shape) C - (core strap) E - (fairwater slab) P - (pipe core) R - (rod, cylindrical) M - (machine-formed

11、 interlocking core) P - (plate) N - (no core) B - (bar, square) D - (disc, segmented) M - (mooring chain) 2. APPLICABLE DOCUMENTS 2.1 General. 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 secti

12、ons 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 cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, w

13、hether 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 this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in th

14、e solicitation or contract. FEDERAL SPECIFICATIONS QQ-B-639 - Brass, Naval: Flat Products (Plate, Bar, Sheet, and Strip) FEDERAL STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services FED-STD-H28/7 - Screw-Thread Standards for Federal Services Section 7 Pipe Threads, General Purpose (Co

15、pies of these documents are available online at http:/quicksearch.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

16、 otherwise specified, the issues of these documents are those cited in the solicitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-18001L 3 CODE OF FEDERAL REGULATIONS (CFR) 29 CFR 1910 - Occupational Safety and Health Stand

17、ards 29 CFR 1915 - Occupational Safety and Health Standards for Shipyard Employment (Copies of these documents are available from the Superintendent of Documents, U.S. Government Printing Office, Washington DC 20401 or online at www.gpoaccess.gov/index.html.) 2.3 Non-Government publications. The fol

18、lowing documents 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. ASTM INTERNATIONAL ASTM A36/A36M - Standard Specification for Carbon Structural Steel ASTM A53/A53M - Standard Spec

19、ification for Pipe, Steel, Black and Hot Dipped, Zinc Coated, Welded and Seamless ASTM A513/A513M - Standard Specification for Electric Resistance Welded Carbon and Alloy Steel Mechanical Tubing ASTM A524 - Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures

20、ASTM B139/B139 - Standard Specification for Phosphor Bronze Rod, Bar, and Shapes ASTM E290 - Standard Test Method for Bend Testing of Material for Ductility ASTM E536 - Standard Test Methods for Chemical Analysis of Zinc and Zinc Alloys (Copies of these documents are available from ASTM Internationa

21、l, 100 Barr Harbor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959 or online at www.astm.org.) EUROPEAN COMMITTEE FOR STANDARDIZATION BS EN 10025-1 - Hot Rolled Products of Structural Steel. General Technical Delivery Conditions BS EN 10305-1 - Steel Tubes for Precision Applications (Copies of

22、these documents are available online from BSI at http:/ INTERNATIONAL ORGANIZATION FOR STANDARDIZATION (ISO) ISO 2768-1 - General Tolerances Part 1: Tolerances for Linear and Angular Dimensions without Individual Tolerance indications (Copies of this document are available from International Organiz

23、ation for Standardization (ISO), 1, ch. de la Voie-Creuse, Case postale 56 CH-1211 Geneva 20, Switzerland or online at www.iso.org.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein

24、, 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 Materials. 3.1.1 Zinc. The anodes shall conform to the composition specified in table II as determined by the

25、 methods specified herein (see 4.3.3). Total of elemental constituents not specified in table II shall not exceed 0.10 percent. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-18001L 4 TABLE II. Chemical composition, zinc anodes. Element Weig

26、ht (percent) Lead 99.414 3.1.2 Steel straps and pipe. Type ZHS, ZHC, ZSS, ZBS, and ZTS anodes shall have steel strap cores conforming to ASTM A36/A36M or BS EN 10025-1. Type ZEP and ZBP anodes shall have steel pipe cores conforming to ASTM A524 or BS EN 10305-1. Type ZMP anodes shall have steel pipe

27、 cores conforming to ASTM A524 and ASTM A513/A513M. Hot dip or electrodeposition methods may be used. Either coating shall be adherent and free from flaking. The coating shall adhere tenaciously to the surface of the base metal (see 4.3.3.5). 3.1.3 Brass straps. Type ZHB zinc anodes shall have brass

28、 strap cores conforming to Alloy 482 of QQ-B-639 or phosphor bronze straps conforming to Composition A of ASTM B139/B139M. The brass or bronze straps shall be coated with zinc to a minimum thickness of 0.0005 inch (0.0127 millimeter) (see 4.3.3.5). The maximum copper content in the zinc, as specifie

29、d in table II, may be increased to 0.020 percent for Type ZHB anodes. 3.1.4 Steel machine-formed interlocking cores. Type ZDM zinc anodes shall have machine-formed interlocking cores conforming to commercial grade mild or leaded steel. The cores shall be flash coated with zinc, tin, or aluminum prio

30、r to assembly within the zinc anodes. 3.1.5 Recycled, recovered, or 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 requiremen

31、ts, and promotes economically advantageous life cycle costs. 3.1.6 OSHA standards. The material described by this specification contains elements for which the Occupational Safety and Health Administration (OSHA) has set standards for exposure limits. Handling, storage, and application of this mater

32、ial should be in accordance with the most recent 29 CFR 1910 and 1915 and any other safety and health regulations (local or otherwise) which may apply. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-18001L 5 3.2 Manufacture. 3.2.1 Type ZHS,

33、ZHB, and ZHC, hull slab anodes (see figures 1, 2, and 7 through 10), types ZSS, submarine slab anode, type ZBS, zinc bar steel strap anode, and ZTS, teardrop anodes (see figures 4 through 7 and figure 22). Type ZHS, ZHB, ZHC, ZSS, ZBS, and ZTS anodes shall be manufactured by any casting process prov

34、ided the anodes meet the other requirements covered by this specification. Open or closed molds may be used. Cores and straps shall be positioned so that they are embedded inch -116 inch or + inch (6.35 millimeters -1.58 millimeters or +3.175 millimeters) as shown on figures 1 through 11 which may b

35、e measured from either surface of anode as applicable, except figure 5, which shall be embedded 38 inch -116 inch or + inch (9.525 millimeters -1.58 millimeters or +3.175 millimeters) and figure 22, which shall be embedded .86 inch inch (21.8 millimeters 3.3 millimeters). A metallurgical bond shall

36、be obtained between the zinc and the strap when tested as specified in 4.3.1.3 or 4.3.1.4. Type ZHC anodes, designated as shown on figures 9 and 11, are intended for use with rubber washers for submarine application. Countersinks for rubber washers shall be cast or machined. Anode shall be manufactu

37、red so that the countersink is centered on the core hole. Type ZSS anodes, designated as shown on figures 4 through 6, and type ZBS anode as shown on figure 22, may be mounted by welding or by fasteners. Those intended to be attached by fasteners shall indicate the requirements for mounting holes in

38、 the strap. The mounting hole shall be counterbored on the structure side of the strap. 3.2.2 Type ZEP, fairwater slab anode, and type ZMP, mooring chain anode (see figures 12 through 20 and figure 28). The pipe core inserts shall conform to 3.1.2. A sound metallurgical bond shall be obtained betwee

39、n the core and anode material for at least 30 percent of the total surface of the core in contact with the anode when tested as specified in 4.3.1.3 or 4.3.1.4. The position of the pipe core insert shall not vary more than inch (3.175 millimeters) from center as shown on figures 12 through 20 and fi

40、gure 28. 3.2.3 Type ZBP, zinc bar anode (see figure 21) and type ZBS, zinc bar steel strap anode. The position of the pipe core and steel strap insert specified in 3.1.2 shall not vary more than inch (6.35 millimeters) from the center as shown on figure 21 and figure 22. The metallurgical bonding re

41、quirements between anode and core specified in 4.3.1 shall apply. 3.2.4 Types ZPN and ZRN anodes (no core) (see figure 23). Type ZPN and ZRN anodes (no core) shall be manufactured by any process provided the anodes pass the tests demonstrating mechanical properties (see 3.6) and other requirements c

42、overed by this specification. 3.2.5 Type ZDM, zinc segmented disc, machine-formed interlocking core anode (see figures 24 through 27). Metallic bonding or an interference fit of the core into the anode shall be required so that an axial force applied from the stud end to remove the core insert is a

43、minimum of 750 pounds (340 kilograms). 3.2.5.1 Core insert. The machine-formed core insert specified in 3.1.4 shall be manufactured in accordance with details and tolerances shown in FED-STD-H28 and FED-STD-H28/7. This core insert has been designed for mass production by modern machine methods. The

44、insert consists of an integral piece having a threaded male stud at one end and a tapped hole at the other end. Provision has been made to achieve self-locking characteristics to interlocking threaded assemblies of multiple segmented anode discs by interference fit of bottom male threads into a tape

45、r tapped hole. These anodes shall screw together very snugly by hand tightening or by using simple hand tools, such as pliers or pipe wrenches. 3.3 Dimensions. Anode dimensions shall be as specified on figures 1 through 30 (see 4.2.2). 3.3.1 Types ZHS, ZHB, ZHC, ZTS, ZSS, ZBS, ZEP, ZBP, ZDM, ZRN, an

46、d ZMP anodes. The specified anodes shall conform to the dimensions shown on figures 1 to 28, inclusive. Dimensions are in inches unless otherwise indicated on the figure. 3.3.2 Type ZPN anodes. Type ZPN anodes shall be 48 inches (1219.2 millimeters) in length by 24 inches (609.6 millimeters) in widt

47、h. Thickness of Type ZPN anode shall be either 0.5 or 1 inch (12.7 or 25.4 millimeters), as specified (see 6.2). 3.3.3 Weight. Minimum weight requirements are specified on figures 1 through 30. The total weight of the specified type of anode received divided by the total number of anodes of that typ

48、e shall be equal to or greater than the minimum weight of anode type specified (see 4.2.2). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-18001L 6 3.4 Permissible variation in dimensions. 3.4.1 Length and width of types ZHC, ZHB, ZHS, ZTS,

49、ZPN, ZSS, ZBS, and ZBP anodes. The width and length of the zinc alloy on Types ZHC, ZHB, ZHS, ZTS, ZPN, ZSS, ZBS, and ZBP anodes shall not vary more than inch (3.75 millimeters), measured at the widest surface of the tapered (for mold release) anode. 3.4.2 Length of type ZRN anodes. A variation of 0.25 inch (6.35 millimeters) will be permitted based on nominal lengths of