MIL-DTL-18001 Anodes, Sacrificial Zinc AlloyThis specification covers the requirements for zinc anodes \(galvanic protectors\) in the form of plates, slabs, discs and rods for 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 \(OSHA\) has set standards for exposure limits. Handling, storage, and application of this material should be in accordance with the most recent Code of Federal Regulations Title 29, Part 1910 and 1915 and any other safety and health regulations \(local or otherwise\) which may apply.

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MIL-DTL-18001L

TABLE II. Chemical composition, zinc anodes.

Element

Weight (percent)

Lead

<0.006

Iron

<0.005

0.025 � 0.07

Cadmium

Copper

<0.005

0.1 � 0.5

Aluminum

Zinc

>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 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 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 specified 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 prior 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 requirements, 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 material 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.