Corrosion Protection Services

Uniform corrosion, as the name suggests, occurs over the majority of the surface of a metal at a steady and often predictable rate.

The ability of coatings to resist corrosion over extended periods is an important contributor in safeguarding the capital investment in the structure of a vessel. Protective coatings are the first line of defense against the corrosive marine environment. Coatings mainly serve to minimize the rate of corrosion, thereby potentially delaying the utilization of the built-in corrosion margins included in a vessel's structural scantlings.

Understanding how coatings reduce corrosion rates, how they must be maintained and how coatings eventually break down are important elements of safe vessel operation.

Corrosion of steel in ballast and cargo tanks may be defined as an electrochemical process in which the steel reacts with its environment to form an oxide or the other compound, similar to the ore from which it was originally obtained.

Although it is unsightly its predictability facilitates easy control, the most basic method being to remove corrosion with water blasting, specified marine paint applications and corrosion removal systems.

GVMS can provide construction services for corrosion prevention programs on offshore platforms & vessels, from top to bottom.

Uniform corrosion can be slowed or stopped by using the four basic facts:

  1. Slow down or stop the movement of electrons
    • Coat the surface with a non-conducting medium such as paint, lacquer or oil.
    • Reduce the conductivity of the solution in contact with the metal an extreme cases being to keep it dry. Wash away conductive pollutants regularly.
    • Apply a current to the material (see cathodes protection).
  2. Slow down or stop oxygen from reaching the surface. Difficult to do completely but coatings can help.
  3. Prevent the metal from giving up electrons by using a more corrosion resistant metal that contain higher in the electrochemical series. Use a sacrificial coating which gives up its electrons more easily than the metal being protected. Apply cathodes protection use inhibitors.
  4. Select a metal that forms an oxide that is protective and stops the reaction.

Corrosion Protection Programs

  • Vessel & Rig Corrosion Repair
  • Water Blasting
  • Stursture Replacement
  • Deck Repair
  • Paint Restored
  • Walkway Repair
  • Inner & Outer Sheild Repair
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