MIL-DTL-24625A(SH)
4.4.3 Ductility. Testing procedures ASTM E290 and B489 shall be followed for the ductility testing of the
substrate and the platinum coating, respectively. Grade A anodes shall be tested in accordance with ASTM E8
tension testing of metallic materials. Grade C anodes shall have a ductility rating capable of making a 180-degree
bend over a 3-inch radius.
4.4.4 Platinum thickness. Platinum thickness shall be determined by methods outlined in ASTM B487, ASTM
B567, ASTM B568, or ASTM B748. The platinum thickness shall comply with 3.4.1. If the substrate is rough
relative to the coating thickness, the interface of the coating cross-section may be too irregular to permit accurate
measurement of the average thickness in the field of view. If this occurs, another sample shall be taken from the lot.
If both samples are too irregular to obtain an average, the lot shall be rejected.
4.4.5 Watertight connection. The sample specimens used for destructive adhesion tests (see 4.4.2) may be used
as specimens for the watertight connection test. Anodes shall be tested using ASTM E1003 or MIL-C-24217 for
hydrostatic pressure testing. For purposes of determining test ranges, Class 2 connections are considered to operate
within a hydrostatic pressure range of 0 to 10,000 pounds/inches-squared. Class 1 connections shall be tested to 1/10
the pressure of Class 2 connections.
4.4.5.1 Electrical resistance. Electrical resistance shall be measured using a meter with a resolution better than
0.1 milliohm. Anodes shall be set up for testing in the following ways:
Pigtail connected anodes. The cable of the sample specimen shall be cut 6 inches above the anode
a.
connection.
b.
Pin connected anodes. The appropriate cable for the anode shall be attached and cut 6 inches above the
anode connection.
4.4.6 Wire thickness. Each Grade A anode coil shall be tested for wire thickness. The sample specimen shall
have each coil end attached to an ohm meter with a resolution better than 0.1 milliohm.
4.4.7 Shock. Anode holders shall conform to shock Grade B in accordance with MIL-S-901. Water intrusion
through the anode gland following testing is unsatisfactory.
4.4.8 Chemical resistance. Testing shall be performed on the anode assembly in accordance with ASTM D543
for resistance to the following reagents:
a.
Acetone
b.
Sodium chloride solution
c.
Sodium hypochlorite solution acidified with dilute HCl to a pH < 4
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. Anodes covered by this specification are intended for use with impressed current cathodic
protection systems for corrosion protection of underwater surfaces. They are primarily designed for application in
the water alongside the ship's or submarine's hull and within submarine ballast tanks.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
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