MIL-PRF-24647E
3.4.3 Storage stability. A previously unopened, original container of paint, when stored and tested as required
a.
Readily mix with a mechanical mixer within 5 minutes to a smooth uniform condition.
b.
Be free of grit(s), seed, tough or gummy sediment, skins, hard pigment settling, and persistent foam.
c.
Not vary from the characteristics established by table IV by more than the following:
(1) Consistency ten Kreb units (KU).
(2) Dry-to-touch and dry-hard times 60 minutes.
(4) Each individual paint of the system shall be readily applied to the manufacturer s ASTM F718 wet film
thickness with no sagging, running, or streaking.
3.4.3.1 Shelf-life. An original, unopened can of each individual paint or component of the system shall meet
3.4.3.2 Partially full container. Each individual paint or component of the system shall meet the requirements
3.4.3.3 Accelerated storage stability. An original, unopened can of each individual paint or component of the
3.4.3.4 Condition in container. When tested in accordance with 4.4.4.4, the coating system or components shall
meet the requirements of 3.4.3.
3.4.4 Resistance to tropical biofouling organism attachment. Physical damage to the antifouling topcoat related
to the toughness of the film to withstand immersion and fouling growth/release shall be considered as part of the
percent of the total surface susceptible to marine fouling. Panel testing (3.4.4.1) and ship testing (3.4.4.2) may be
done concurrently at the discretion of NAVSEA.
3.4.4.1 Panel tests.
3.4.4.1.1 Type I, type II, and type IV, all grades and classes, application 1 and 2 paints. Type I, Type II, and
Type IV, all grades and classes, Application 1 and 2 paints shall meet the following requirements when tested in
accordance with 4.4.1.1.i:
a.
The anticorrosive paint layer shall:
(1) Not be exposed at any point due to erosion of the antifouling paint.
(2) Be free of peeling or flaking and shall not be rated lower than 8 few for blistering.
b.
The antifouling topcoat shall not be rated:
(1) Lower than 9 (any pattern type) for checking.
(2) Lower than 9 (any pattern type) for cracking to the anticorrosive coating.
(3) Lower than 8 few for blistering.
c. The fouling resistance (FR) rating of the antifouling topcoat shall not be less than 90 (slime excluded) at
any time during the test.
3.4.4.1.2 Type I and type II, all grades and classes, application 3 paints. Type I and Type II, all grades and
classes, Application 3 paints shall meet the requirements of 3.4.4.1.1, when tested in accordance with 4.4.1.1.h.
3.4.4.1.3 Type III, all grades, classes, and applications paints. Type III, all grades, classes, and applications
paints shall meet the following requirements when tested in accordance with 4.4.1.1.i:
a. For those panels with more than 25 percent hard-fouling (i.e., barnacles, encrusting bryozoa, and
tubeworms) after the static immersion period, 60 percent of this fouling shall release by a 20 knot velocity in
channel flow testing.
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