MIL-PRF-24647E
4.4.9 Cathodic protection compatibility. Two steel panels shall be retrieved from those tested in 4.4.1.1 after
completion of the required test. Each test panel shall be electrically connected by an insulated copper wire to an
ASTM G80 magnesium anode and shall have a 3.175 mm (⅛ inch) (nominal) hole drilled through the coating to the
metal at the center of the test panel. The electrical resistance between a point on the surface of the anode and the
metal in the drilled hole of the test panel shall be less than 0.01 ohm, when checked with an ohm meter. Connecting
points on the test panel shall be coated with an epoxy compound for insulation. The test panel shall be reinstalled in
the ASTM D3623 test in such a manner as to separate the test panel from the magnesium anode by 60 centimeters (2
feet) (nominal) for a period of 3 months. At the completion of the 3-month test, inspect each test panel for lifting or
undercutting around the drilled hole, peeling, blistering, dissolving, or other paint film defects. Test results shall b e
in accordance with the requirements of 3.4.9.
4.4.10 Pressure cycling. NSWC-SSES Code 617 may be contacted for material testing and qualification.
4.4.11 Soluble and total metal content. Soluble and total metal content shall be determined on a dry paint film
made from each individual paint of the paint system in accordance with the 40 CFR Part 261.24(a), Toxicity
Characteristic Leaching Procedure (TCLP). Test results shall be in accordance with the requirements of 3.3.5.
4.5 Toxicological product formulations. The toxic(s), biocides, or pesticides used in the product being
qualified shall be in accordance with the requirements of the type for which the product is being qualified (see 3.3.1
and 6.3). The contractor shall have the toxicological product formulations and associated information available for
review by the contracting activity to evaluate the safety of the material for the proposed use.
4.6 Toxicity. An HHA shall be conducted to ensure conformance to 3.3.5.3, as required by the qualifying
activity. The Navy and Marine Corps Public Health Center (NMCPHC) will evaluate the paint using the
administrative HHA data provided by the manufacturer/distributor to the NMCPHC.
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. This specification covers a variety of high grade paint systems. These coatings are intended
for application to ship hulls to prevent marine biofouling and corrosion. Types I and II antifouling topcoat paints are
intended to polish (erode or ablate) under water flow conditions to provide a biofouling free, smooth hull for fuel
efficiency. Type III antifouling topcoat paints are intended to provide a foul-release topcoat while Type IV
antifouling topcoat paints provide biofouling control without eroding. The paint systems covered by this
specification include paints that can be applied to steel, aluminum, and rubber substrates. Antifouling paint
conforming to present air protection regulations (1990) is required as Grade A, but the specification provides grades
at lesser VOC levels to encourage manufacturers to develop more environmentally acceptable materials. Except for
the biocide-containing antifouling topcoats of Types I, II, and IV, the individual dried paint residues and dry paint
contaminated debris may constitute non-hazardous waste.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Type, class, grade, and application of paint required (see 1.2).
c.
Certifications (if any) required (see 3.3.5.2).
d. Requirement for written certification and technical justification that formulation changes do not negatively
affect the long-term properties of the material (see 3.3.5.3).
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