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Description - Blume Antifouling System

Marine growth, corrosion and scaling in sea water intakes, piping and heat transfer surfaces, if uncontrolled, can result in increased operating and maintenance costs. Fouled piping, valves, strainers and heat exchangers cut down the cooling water flow resulting in increased fuel consumption and, therefore, more frequent cleanouts. In addition, these fouling sites can lead to accelerated corrosion, which unchecked, results in eventual expensive equipment renewal.

The Blume Antifouling System incorporates the latest technology, the use of impressed current sacrificial anodes for the protection of the sea water service system in ships, drilling rigs, offshore structures and coastal installations. The key elements of the system are the copper and aluminum anodes employed.

The copper serves as the marine growth control agent, much like the copper in hull antifouling paints. Copper released at parts-per-billion (PPB) levels effectively inhibits the attachment and growth of marine organisms such as algae, mussels, barnacles, oysters, etc. Thus, by closely controlling the release of copper into the sea water we are able to eliminate fouling by marine organisms. Furthermore, maturing organisms have a threshold tolerance to copper and by exceeding it we are usually able to "force" them to exfoliate, thereby cleaning out an already fouled system.

Aluminum, when released into sea water, forms a complex aluminum hydroxide. Being alkaline, it serves as an effective neutralizing agent, combining with the H+ (acid) ion in a corrosion cell, thereby inhibiting further corrosion. Also, the aluminum hydroxide formed is very gelatinous in nature. In a clean system it will deposit on the surface and reduce the scaling tendencies which might otherwise lead to scale buildup.

Iron (ferrous ion) will function similarly to the aluminum. In applications involving copper-nickel alloys which we suspect may be subject to impingement corrosion (e.g. Cu-Ni condensers on steamships, in power plants, etc.) due to absence of sufficient ferrous ion, we can utilize soft iron anodes effectively.

The Blume Antifouling System effectively combines these technologies in sacrificial anodes capable of providing both marine growth and corrosion control. Design life of the anodes is based on an analysis of such parameters as flow rate, size of system(s) to be treated and accessibility for anode renewal (system shutdown, ship drydocking schedule, anode location, etc.). These factors dictate the size and number of anodes and the current to be applied.

 
 

Blume Antifouling System (Click to download datasheet)

 
 

Serving the marine and offshore oil and gas industries since 1977