Marine

At Corrocoat, we don’t think sea water is aggressive. Through extensive research, we have developed marine sector products to provide proven corrosion protection which lasts in excess of 25 years. Corrocoat is has been widely tested a number of environments for a wide variety of purposes; such as renewables and oil and gas. Through this experience we can advise, supply and even provide engineering services to the marine sector that you can trust.  Corrocoat offers a  wide variety of coatings for corrosion-damaged equipment within the marine environment. So, whether it’s a thrust tunnel, cooling seawater system or a structural steelwork installation, you can rest assured we’ll extend the life expectancy and provide proven long-term protection.

Marine Sector Corrosion Protections

Corrosion Challenges in the Marine Environment

The marine environment presents unique challenges due to the presence of saltwater, high humidity, and varying temperatures. Saltwater is highly conductive and accelerates electrochemical reactions that cause corrosion. The constant exposure to moisture and salt creates an environment where corrosion can occur rapidly, impacting metal surfaces and structures.

Key Corrosion Protection Methods

  1. Coatings and Paints:
    • Protective Coatings: Applying protective coatings, such as epoxy, polyurethane, and anti-fouling paints, is a common method to shield metal surfaces from direct contact with seawater and oxygen. These coatings act as a barrier, preventing corrosive elements from reaching the metal.
    • Zinc-Rich Primers: These primers provide sacrificial protection, where zinc corrodes preferentially to the underlying steel, thereby protecting it.
  2. Cathodic Protection:
    • Sacrificial Anodes: This technique involves attaching more reactive metals, such as zinc, aluminum, or magnesium anodes, to the protected structure. These anodes corrode instead of the protected metal, extending its lifespan.
    • Impressed Current Cathodic Protection (ICCP): This method uses an external power source to provide a continuous flow of electrical current, counteracting the electrochemical reactions that cause corrosion.
  3. Material Selection:
    • Corrosion-Resistant Alloys: Using materials inherently resistant to corrosion, such as stainless steel, copper-nickel alloys, and titanium, can reduce the need for additional protection.
    • Non-Metallic Materials: Incorporating materials like fiberglass-reinforced polymers can provide excellent resistance to corrosion.
  4. Environmental Control:
    • Desalination: Removing salt deposits through regular cleaning and maintenance reduces the rate of corrosion.
    • Humidity Control: Utilizing dehumidification systems in enclosed areas helps limit the moisture content, reducing corrosion risks.

Conclusion

Effective corrosion protection in the marine sector involves a combination of protective coatings, cathodic protection, and the use of corrosion-resistant materials. Regular maintenance and inspection are also crucial to ensuring long-term integrity and performance. By implementing these strategies, the marine industry can mitigate the adverse effects of corrosion, ensuring safety, reliability, and economic efficiency of marine assets.

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Marine

Examples of the marine components we coat include:

  • Pumps
  • Pipes
  • Valves
  • Seawater intakes and outflows
  • Riser pipes
  • Filter screens
  • Deck areas
  • Marine superstructures
  • Stern frames
  • Stabiliser arms
  • Ballast tanks
  • Piling
  • Sea walls
  • Evaporators
  • Fresh water tanks
  • Manifolds
  • Strainers
  • Valve chests
  • Flotation buoys
  • Calorifiers
  • Ice breaker lines
  • Splash zone steel
  • Sub-sea structures

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