Method of corrosion protection
AssigneeCaunned Aktiengesellschaft
InventorLuigi Bagnulo
Life of this patent
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Abstract
An anode for the cathodic protection of a metallic structure subject to corrosion includes a strip or band of aluminum, zinc, magnesium or alloys thereof. The strip or band is anodic to the metallic structure and has a surface which is adapted to face the metallic structure. This surface of the strip or band is provided with a layer of electrically conductive adhesive so as to permit the strip or band to be adhesively secured to the metallic structure and to be in electrical communication therewith. In this manner, metallic structures of any arbitrary configuration may be cathodically protected under all corrosive conditions.
Claims22
A method of anticorrosion protection of long steel pipes and other such structures, similar to that afforded by zinc plating, the method comprising the steps of providing an elongated continuous first layer of such corrodible metal as can serve as sacrificial-anode material;
- arranging on said first layer an elongated continuous second layer of electrically conductive adhesive composition which is adherent to metal surfaces so that said second layer extends along the entire length of, is bonded to and is in electrically conductive surface contact with said first layer over the whole of the facing surfaces of said first and second layers, whereby an elongated flexible anticorrosion tape is produced;
- and applying the thus-produced anti-corrosion tape at the side of said second layer onto long steel pipes or other such structures by spirally winding or otherwise putting on, so that said second layer and thereby also said first layer extends along the surface of the long steel pipes or other structures, and whereby said second layer and thus said first layer is bonded with, and is in electrically conductive surface contact there with.
A method of anti-corrosion protection of metal structures which have dissolution potentials, comprising the steps of providing a continuous first layer or corrodible metal serving as a sacrificial-anode and having an inwardly facing surface, the metal having a dissolution potential greater than that of a structure which is to be protected;
- arranging on said first layer a continuous second layer of an electrically conductive adhesive composition which has an inwardly facing surface, the electrically conducted adhesive composition being adherant to metal surfaces and extending along, being bonded to, and being in electrically conductive surface contact with said first layer, such contact existing entirely over inwardly facing surfaces, whereby a flexible anti-corrosion tape is produced;
- and applying the thus-produced anti-corrosion tape at the side of said second layer onto metal structures so that said second layer and thereby also said first layer extends along the surface of the metal structures, and whereby said second layer and thus said first layer is bonded with, and is in electrically conductive surface contact with the metal structures.
Dependencies are inferred from the claim text.