Marine Industry

Splash-zone corrosion is the single largest source of recurring hull repair work, and the substrate is almost never in textbook condition when the repair is scheduled. Belzona 1212 (surface-tolerant epoxy) is specified for this duty because it bonds to manually prepared, oil-contaminated, or damp steel — conditions that cause general-purpose marine epoxies to disbond inside a season. For erosion-corrosion below the waterline, Belzona 1321 (Ceramic S-Metal) and Belzona 1341 (Supermetalglide) provide a ceramic-filled coating that resists abrasive seawater flow.

Cavitation is implosion damage, not erosion damage, and rigid ceramic coatings tend to spall under repeated implosion energy. Belzona 2141 (ACR Fluid Elastomer) is specified into this service because the elastomer absorbs the implosion energy and recovers between cycles. Material loss that has already occurred is rebuilt with Belzona 1311 (Ceramic R-Metal) before the elastomer goes on.

Ballast tank coating is a crowded technical space — PSPC-grade systems from major coatings suppliers dominate new-build and dry-dock specs. Belzona's role is in in-service repair: re-coating sections of an existing PSPC system that have failed locally, or sealing live leaks at structural members where dry-out is impractical. The surface-tolerant 1212 plus the immersion-grade 5811 stack handles the substrate condition that disqualifies most polyamide cures.

Internal corrosion in bilges, sea chests, and keel coolers is dominated by the combination of standing seawater, residual hydrocarbons, and dissimilar-metal galvanic cells at fasteners and welds. Belzona 5811 (Immersion Grade) is the standard internal coating; for potable water and CHT tanks, Belzona 5811DW2 carries NSF/ANSI 61 approval for drinking water service.

Wet decks and engine-room walkways drive a measurable slip-and-fall liability for owners. Belzona 4411 (Granogrip) provides a graded slip-resistant surface; concrete dock surfaces, dock-edge transitions, and dry-dock floor repair use the 4000-series fast-cure mortars and coatings.

Belzona's marine portfolio carries a range of class society and regulatory approvals — ABS, DNV, Lloyd's Register, and NSF among them — but the approvals are per product, not blanket. Confirm the relevant PSS and class certificate against the specific product number before finalising any specification. Don't accept a generic 'ABS-approved' claim without the product code attached.

Sectors with overlapping asset types: Oil and Gas Industry (marine overlap), Power and Hydropower Industry (water intake and cooling structures). Asset-level deep dives: Ships & Maritime Structures, Pumps, Heat Exchangers, Engines & Casings, Valves, Pipes & Fittings.