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protective device against the harmful vegetation of stalbygningsdele situated under the water, and which is protected against corrosion by help of protective materials
protective device against the harmful vegetation of stalbygningsdele situated under the water, and which is protected against corrosion by help of protective materials
Steel structural units for underwater use, esp. ships and pipes, are protected against corrosion and fouling, by plant or other growth, by applying a metallic anti-fouling agent, surrounding steel unit entirely or in part, on an electrically insulating layer coating the surface of the steel unit. Long-term protection is given; anti-fouling protection lasts for several years and can be renewed without lifting steel units out of sea-water, drying and repainting. Insulating layer pref. consists of a plastic, e.g. polyethylene, and anti-fouling agent of Cu or a Cu alloy, used as a wire, strip, foil, mesh, paint or sprayed-on powder.
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