MIL-PRF-24647E
1.2.3 Grades. The grades of ship hull anticorrosive and antifouling paint systems are determined by the volatile
organic compound (VOC) content in the ready-to-apply condition.
Grade A -
VOC of the antifouling topcoats less than or equal to 400 grams per liter (g/L) [3.4 pounds per
gallon (lb/gal)]. VOC of any other individual paint in the system less than or equal to 340 g/L
(2.8 lb/gal).
Grade B -
VOC of the antifouling topcoats less than or equal to 400 g/L (3.4 lb/gal). VOC of any other
individual paint in the system less than or equal to 250 g/L (2.1 lb/gal).
Grade C -
VOC of the antifouling topcoats less than or equal to 400 g/L (3.4 lb/gal). VOC of any other
individual paint in the system less than or equal to 100 g/L (0.8 lb/gal).
1.2.4 Applications. The applications of ship hull anticorrosive and antifouling paint systems are determined
(defined) by the expected service life.
Application 1
-
Paint systems for use on the underwater hull with a service life of 3 years without failure
due to loss of adhesion, blistering, flaking, depletion by excessive ablation, or loss of
antifouling capability (except minor sliming and biofouling from the boottop to the light
load line).
Application 2
-
Paint systems for use on the underwater hull with a service life of 7 years without failure
due to loss of adhesion, blistering, flaking, depletion due to excessive ablation, or loss of
antifouling capability (except sliming and biofouling from the boottop to the light load
line).
Application 3
-
Paint systems for use on the underwater hull with a service life of 12 years without failure
due to loss of adhesion, blistering, flaking, depletion due to excessive ablation, or loss of
antifouling capability (except sliming and biofouling from the boottop to the light load
line).
Application 4
-
Paint systems for use on high-speed vessels attaining 40 knots or greater with a service life
of a minimum of 2 years without failure due to loss of adhesion, blistering, flaking,
depletion by excessive ablation, or loss of antifouling capability (except minor sliming and
biofouling from the boottop to the light load line).
TABLE I. Coating system type, class, application matrix.
Type
Class
App 1
App 2
App 3
App 4
1
YES
YES
YES
YES
I
2
YES
YES
YES
YES
3
YES
YES
YES
NO
1
YES
YES
YES
YES
II
2
NO
NO
NO
NO
3
YES
YES
YES
NO
1
YES
YES
NO
YES
III
2
YES
YES
NO
YES
3
YES
YES
NO
NO
1
YES
YES
NO
NO
IIIa
2
YES
YES
NO
NO
3
YES
YES
NO
NO
IV
1
YES
NO
NO
NO
2
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