Sacrificial anodes : an efficient solution for offshore and marine corrosion prevention and cathodic protection

In cathodic protection, a metal anode that is more reactive to the corrosive environment of the system to be protected is electrically linked to the protected system, and partially corrodes or dissolves, which protects the metal of the system it is connected to. As an example, an iron or steel ship's hull may be protected by a zinc sacrificial anode, which will dissolve into the seawater and prevent the hull from being corroded.

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Sacrificial anodes, cathodic protection, antifouling systems

Cathodic Protection is an electrochemical technique used as an economic and efficient solution to prevent and control the corrosion of various types of metallic structures and plants: ships, platforms, wharves and sub-sea pipelines, as well as underground pipelines, tanks, concrete reinforcing bars and foundation piles.

Its high efficiency is based on the principle of polarization of the structure to be protected. It is possible to alter the potential of the structure to the point of reducing it sufficiently to prevent corrosion by means of Cathodic Protection Systems (using Sacrificial Anodes or Impressed Current).

Somewhere, especially in marine sector, a corrosion prevention system must be coupled with an Antifouling System: as by metal corrosion, both vessels and seawater pipelines need to be protected by growth of fouling.

Follow these links for more information:

• Sacrificial anodes for offshore application (Bolted bracelet, Welded bracelet, Jacked anodes, Flush mounted anodes)
• Sacrificial anodes for marine application (zinc and aluminium oval anodes, zinc and aluminium drop anodes)

Sacrificial anodes, sacrificial anode, zinc anodes, aluminium anodes

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