Page 218 - Challenges in Corrosion Costs Causes Consequences and Control(2015)

196 CORROSION CAUSES

Shipboard coatings
(Maintenance Drivers)
Super structure
and catwalks
(enamel, silicone Flightdeck and
alkyd)
topside decks
(non-skid)

Interior
bulkheads and
decks
(chlorinated
alkyd)
Bilge/wet
Tanks and spaces
voids (epoxy)
(epoxy)

Underwater hull Topside camouflage and Machinery space/passageway
(antifonling) freeboard (enamel, silicone alkyd)
(enamel, silicone alkyd)
37
Figure 3.29 Destroyer with different shipboard coatings (7).

TABLE 3.21 Annual Maintenance Demand on Sailors for Coating
Maintenance
Maintenance Activities Man-Years Per Ship

Topside and freeboard (enamel, silicone alkyd) 9.0
Flight decks and topside decks 4.0
Bilges/wet space corrosion 4.5
Machinery space 2.25
Interior bulkheads and decks 3.00
Superstructure, catwalks, mixing 3.25
Total 26.00

in the figure have a design life of 10–15 years, after which the ship has to be in dry
dock to completely remove the “old” coating and apply the “new” coating.
Between the major maintenance cycles, there is an annual maintenance demand for
continuous corrosion maintenance. Table 3.21 shows the annual maintenance demand
on sailors for coating maintenance of navy surface ships.
3.31.9 Submarines

The Navy operates 18 fleet ballistic missile submarines and 56 nuclear attack sub-
marines. Because of the confidential nature of the submarines, no information on the
corrosion aspects could be obtained.