Abstract:
An improved marine anode sled comprises a single piece casting with high surface to weight ratio providing increased active surfaces and improved reliability. In one embodiment the anode weighs about 2,000 lbs and has an active surface area of about 5,000 square inches and a current output capacity of up to 160 amps. The improved anode has considerably higher current output than existing anode sleds with similar weight. Unlike known anode sleds, the entire exposed surface of new anode sled is anode material and passes current to a surrounding medium. The single piece casting eliminates structural failure when a frame of know anode sleds is damaged, and electrical failure when cables connecting multiple anodes are damaged. Two redundant lead cable are attached proximal to opposite corners to optimize reliability and electrical performance.
Abstract:
Eine optoelektronische Anordnung, welche als ein optoelektronisches Bauelement (10, 20, 30, 40, 50, 60) ausgebildet ist, umfasst ein erstes korrodierbares Element (110) und eine erste Opferanode (120). Das erste korrodierbare Element (110) weist ein erstes korrodierbares Material (111) auf. Die erste Opferanode (120) weist ein erstes Opfermaterial (122) auf, das unedler als das erste korrodierbare Material (111) ist. Das erste korrodierbare Element (110) und die erste Opferanode (120) sind elektrisch leitend miteinander verbunden. Die optoelektronische Anordnung kann auch als eine optoelektronische Bauelementeanordnung (500, 600) ausgebildet sein.
Abstract:
A cathodic protection system is provided for a subterranean well casing having an enclosed upper section of the well casing being substantially shielded by a cellar from an impressed- current cathodic protection circuit passing through earth media. The impressed-current cathodic protection circuit is provided to protect an unenclosed lower section of the well casing. To protect the enclosed upper section of the well casing, a supplemental cathodic protection circuit is provided. The supplemental cathodic protection circuit is a galvanic anode cathodic protection circuit comprising the enclosed upper section of the well casing and one or more bracelet galvanic anodes being circumferentially mounted to the enclosed upper section. The enclosed upper section of the well casing and the one or more bracelet galvanic anodes are substantially surrounded by a cellar backfill, and the galvanic anode cathodic protection circuit is equally effective throughout a broad range of non-homogeneity within the cellar backfill.
Abstract:
An anode assembly for an impressed current cathodic protection system is arranged for disposition in a body of water to protect an associated structure. It includes an anode, an anode support and a base and is arranged to be electrically connected to the cathodic protection system by an electrical conductor. The base is a weighted member. The anode is of a spherical shape and comprises a hollow titanium body coated with a mixed metal oxide and filled with a non-conductive material. The anode support includes an elongate titanium tube projecting upward from the base and having a top portion to which the anode is welded, whereupon the anode is disposed above the bed of the body of water. The anode assembly is connected to the electrical conductor by a socket including an electrical connector mounted in a box on the anode support assembly.
Abstract:
Befestigungsanordnung für ein Bauteil aus hochlegiertem Stahl, insbesondere Abgasleitung für Verbrennungsgase, umfassend das Bauteil, ein metallisches Befestigungsmittel, das zumindest oberflächlich elektrochemisch unedler ist als der hochlegierte Stahl und ein Zwischenelement aus einem metallischen und nicht-rostenden Werkstoff, der elektrochemisch vergleichbar oder unedler ist als das Befestigungsmittel.
Abstract:
A cathodic protection system for offshore structure includes an elongated electrode carrier, such as a pipe, with a plurality of sacrificial anodes attached, that is placed on the ocean floor and electrically connected to the structures to be protected. The system is particularly useful for retrofitting cathodic protection systems for offshore structures that have exceeded their expected life.
Abstract:
Electrolytic protection of steel-reinforced concrete bodies such as bridges and building facades is achieved with carbon material (3, 12, 23) inserted into the concrete body (6, 10, 21). The carbon material is connected to act as a anode with the steel reinforcement (1, 11, 22) as a cathode, so that corrosive chloride ions migrate away from the steel reinforcement. The carbon material is inserted so as also to act as a reinforcement. In one arrangement carbon textile material is provided between inner and outer grout-filled plastics ducts (2, 4, 5) fixed around post-tensioned steel cables (1). In another arrangement a carbon rod (12), or pin (23), is fixed between a concrete body (23) and a steel I-beam (22).
Abstract:
Cathodic protection of a structure including a steel member at least partly buried in a covering layer, such as steel rebar in a concrete structure, is provided by embedding sacrificial anodes into the concrete layer at spaced positions over the layer and connecting the anodes to the rebar. Each anode is inserted into a drilled hole in the layer and is electrically attached to the rebar in the same or an adjacent hole by a steel pin which is attached to the reinforcement by arc welding or by impact. In the arrangement where the anode and the attachment are in the same hole, the pin passes through a bore in the anode so as to hold the anode rigidly within the hole. The hole is filled by a settable filler material. In order to maintain effective current conduction from the anode to the reinforcement through the filler and the concrete over an extended period to maintain the required protection, there is added to the filler, to a covering layer on the anode body or to the anode body itself a first material to hold the pH at the anode in a preferred range of the order of 12 to 14 and a second deliquescent material to absorb moisture.
Abstract:
An anode for use in a marine environment includes a metallic surface on which is formed a basic metal chloride coating. It is preferred that the basic metal chloride coating is formed by applying a solution containing hypochlorite, a hypochlorite salt or a precursor thereof to the metallic surface and that the metallic surface is copper or contains copper and the coating is a basic cupric chloride. The present invention also provides a method for making an anode for use in a marine environment by applying a solution containing hypochlorite, a hypochlorite-containing material or a precursor thereof to a metallic surface of the anode. The present invention also provides for corrosion resistant system for use in a marine environment including an anode electrically connected to oxidation susceptible under water metal components, the anode having a surface exposed to water of the marine environment, the surface having a basic metal chloride coating.