Protect ballast tanks without downtime
Protect the structural integrity of your floating dry docks, pontoons, and internal ballast tanks against active saltwater corrosion. nC Corrosion Passivator Fluid provides long-term protection directly over wet, rusted steel, eliminating scaffolding, grit blasting, and operational downtime.
The operational challenge
Conventional coatings fail in active shipyard environments due to major operational bottlenecks:
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Scaffolding constraints: Erecting staging inside narrow, high-vertical wing towers is labor-intensive, costly, and nearly impossible in complex frame geometries.
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Grit blasting hazards & waste: Traditional abrasive blasting in confined spaces is labour intensive, time consuming, and creates heavy grit waste removal burdens.
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Surface preparation limits: Standard coatings demand dry, sandblasted steel before application. A condition virtually impossible to maintain in damp ballast tanks during active operations.
| Challenge | Traditional coatings | nC Corrosion Passivator Fluid |
|---|---|---|
| Surface tolerance | Requires clean, dry, sandblasted substrate. |
Applies directly onto wet, rusted steel with no blasting required. |
| Access & staging | Requires extensive scaffolding inside wing towers. | Floating application covers entire tanks without scaffolding. |
| Asset availability | Downtime during preparation, application, and cure. | Application in-service during routine docking schedules. |
| Environmental impact | Grit waste and solvent emissions. | Non-petroleum, VOC-free formula eliminates toxic grit waste and hazardous solvents. |
Application method
Preparation of the metal surface
The application of nC Corrosion Passivator Fluid requires no grit blasting or mechanical surface preparation, bonding directly to wet, rusted steel. Heating or drying of the surface is not necessary.
Application by airless spray
The application process combines targeted airless spraying for accessible lower zones and overhead framing with a floating technique using either fresh or salt water. The calculated consumption for airless spray application is 5 to 7 m² per liter.
Application by floating
nC Corrosion Passivator Fluid floats on water. After crew members spray initial structures, they pour the calculated Fluid volume onto the water inside the ballast tank, and allow routine ballasting cycles to distribute the product to the tank surface. The calculated consumption for floating application is 1 liter per 1 m³
No down time
Application can be performed entirely in-service during routine docking schedules, preserving structural integrity without sacrificing dry dock availability.
Proven track record since 2021: Bridge pontoon
Since 2021, Shipyard Reimerswaal has used nC Corrosion Passivator Fluid and the spray-and-float method to protect internal bridge pontoon structures. Successful passivation turned active rust (bright orange) into a stable dark anthracite layer. After 4.5 years, the pontoon remains well-protected, with only minor spots needing touch-ups. Following this proven performance, the shipyard has chosen the same treatment for their floating dry dock.
Before and after application with nC Corrosion Passivator Fluid
