CATHODIC PROTECTION CURRENT DISTRIBUTION METHOD AND APPARATUS FOR CORROSION CONTROL OF REINFORCING STEEL IN CONCRETE STRUCTURES
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United States of America Patent
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Issued Date -
Sep 11, 2014
app pub date -
Mar 7, 2013
filing date -
Mar 7, 2013
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Abstract
Mixed-metal-oxide (MMO) coated precious-metal tape is installed directly on concrete surfaces using an electrically non-conductive adhesive with semi-conductive coating or overlay, thereby obviating the need for slots or holes to the concrete structures which are not subject to direct moisture. The tape anodes may be installed on the concrete surfaces exposing metals without developing an electrical short circuit between the anode and the metals due to the non-conductive adhesive. The semi-conductive layer over the metal tape can distribute the CP current uniformly to the entire concrete surface without developing electrical short circuit. Overall the invention provides for quick and low cost installation on many concrete structures. Interconnections between the tape anodes and bare metal distribution elements may be made with conductive adhesive or spot welding.
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