INTERIOR COMPARTMENT COATINGS
Coating systems discussed in this section are designed for application in interior compartments of U.S. Navy ships. Interior compartments are not subject to the harsh conditions of topside and freeboard areas, allowing the use of water-based latex paint.
These areas are first coated with an anti-corrosive primer, and then a topcoat of water-based latex or interior enamel is applied. For interior passageway decks, a durable coating is applied to resist wear.
Anti-corrosive primer is first applied to the interior compartment substrate. This primer may be either two coats of Formula 84, TT-P-645; one coat of MIL-PRF-23236, Type V, VI, or VII, Class 5 or 7; or one coat of MIL-PRF-32171, Type I or III, Class 1 or 2.
The topcoat consists of a water-based latex or interior enamel. The color of this topcoat is determined by the Type Commander (TYCOM) or the ship’s Commanding Officer. For bulkheads and overheads, NAVSEA Standard Item (NSI) 009-32 recommends two coats of MIL-PRF-24596 or two coats of MIL-DTL-24607. Areas to be overcoated are recommended for a single coat of either topcoat. For interior passageway decks not receiving any additional covering, NSI 009-32 requires the use of MIL-PRF-32171, Type I or III, Class 1 or 2.
To ensure coating adhesion, special attention should be paid to the surface preparation in accordance with NSI 009-32. Abrasive blasting in accordance with SSPC-SP 10/NACE No. 2, Near-White Blast Cleaning, power tool cleaning in accordance with SSPC-SP 11, Bare Metal Power Tool Cleaning, or hand tool cleaning in accordance with SSPC-SP 2, Hand Tool Cleaning is required. For overcoating, SSPC-SP 2, or SSPC-SP 3, Power Tool Cleaning is required.
NSI 009-32 is the governing document for preservation requirements. Permitted coatings are specified in Table 3. All interior compartment coating system preservation efforts must be accomplished in accordance with NSI 009-32.
Ship’s force personnel are responsible for the interior compartment coating system integrity until repair activity maintenance is scheduled. Naval Ships Technical Manual: Chapter 631 (NSTM 631), Preservation of Ships in Service – General provides requirements, instructions, and guidance for surface preparation and coating application.
New construction ships are painted in accordance with the ship build specification for that class of ship.