Permanent reference electrode for monitoring the electrochemical potential of metal structures in concrete and soil

Measurement of electrochemical potential in low electrical conductivity environments

An apparatus for monitoring the electrochemical potential of a metallic structure comprising the metallic structure to be monitored and a reference electrode connected to one another by at least one connector made of a polymer with ion exchange char­ acteristics for reliable, long-term monitoring for 10 to 20 years.

PRE-PACKED DISPERSER ANODE WITH BACKFILL IN FLEXIBLE STRUCTURE FOR CATHODIC PROTECTION WITH IMPRESSED CURRENTS

ELECTRICAL PROCEDURE AND ELECTROLYTIC HUECRE FOR THE PREPARATION OF ORGANIC COMPUTER

METHOD FOR MEASURING THE ELECTROCHEMICAL POTENTIAL OF METALLIC STRUCTURES IN LOW ELECTRIC CONDUCTIVITY ENVIRONMENTS AND DEVICES REQUIRED FOR ITS REALIZATION.

ANODE WITH A LARGE LINEAR EXTENSION FOR CATHODIC PROTECTION

Method of generating halogen, an electrode-membrane assembly, an electrolytic cell and a semipermeable ion-exchange membrane for said method

Aqueous alkali metal hydroxide is electrolyzed to generate elemental halogen in a cell having a sandblasted membrane (105) or other rough or abraded surfaced ion exchange membrane (105) with the rough surface exposed to electrolyte. While the surface may be on either the anodic or cathodic side lower voltage is attained when it is on the cathodic side. This is especially true when the cathode has an open structure and is in direct contact with the rough surface but unbonded thereto whereby liquid electrolyte is in ready contact both with the electrode and the membrane (105). The electrode is gas and electrolyte permeable and may be in the form of an electroconductive screen (108a, 114) or several electroconductive screens (108a, 114) in face to face contact. These screens (108a, 114) or opposed surfaces thereof may have different hydrogen or halogen overvoltages. Often in such a case the film or screen surface having the higher overvoltage is in contact with the rough membrane (105) surface and the surface or screen having the lower overvoltage is spaced from the membrane (105) with the higher overvoltage surface interposed between the membrane (105) and the lower overvoltage surface. The low overvoltage surface of course is in direct electrical contact with the higher overvoltage surface. Generally the surface having the low overvoltage is greater in area than the surface having the high overvoltage.

Method for electrically connecting non-corrodible anodes to the corrodible core of a power supply cable insulated with a standard insulating material

An improved method of connecting one or more non-corrodible valve metal anodes, the surfaces of which have been activated by a deposit of a non-passivatable material, to the corrodible core of an insulated power supply in order to produce a flexible anode assembly to be used for the cathodic protection of metallic structures. In the inventive method, a plurality of ductile metal bushings (7, 8, 9) are disposed over a tubular valve metal anode (6) provided with a corrosion resistant outer surface. The power supply cable (2) is passed through at least one piece of an elastomeric tubing (5a, 5b) having an inner diameter slightly larger than the cable insulation and an outer diameter slightly smaller than the inner diameter of the anode. The cable and tubing is passed through the anode until a segment of the cable, previously stripped of its insulating sheath, and supplied with a highly conductive split collar (4a, 4b) having a thickness substantially similar to the combined thickness of the cable insulation and elastomeric tubing, is underneath one of the bushings, and at least one piece of the tubing is located on at least one side of the stripped cable segment and underneath at least one of the bushings. After the anode is in place, the circumference thereof is reduced at positions corresponding to the bushings by cold-heading. The inventive method can be used to form a seal between the anode and cables insulated with low cost and chemically resistant non-elastomeric insulating materials.

Impressed current cathodic protection of off-shore platforms utilizing the tensioned anode ropes system

The present invention concerns a system for cathodic protection of off-shore structures, by the impressed current method, which system comprises tubular anode assemblies (1, 1ʹ), coaxially applied onto power supply cables (4), supported by ropes (5) tensioned between anchoring bodies (15) and the structure to be protected (17) or directly supported by the structure to be protect­ed. The tubular anodes, the relevant hydraulic sealings and electrical connections and the power supply cables (4) are not subjected to the mechanical stresses affecting the support.

ELEKTROLYTISKT FOERFARANDE OCH ELEKTROLYTISK CELL FOER FRAMSTAELLNING AV ORGANISKA FOERENINGAR.

ELECTROLYSIS METHOD AND CELL FOR SEPARATING ANION FROM AN ORGANIC COMPOUND

Grid electrode having a tailored surface for cathodic protection of steel reinforced concrete structures

A grid electrode having a tailored surface for cathodic protection of steel rebar reinforced concrete structures comprising a plurality of valve metal strips having voids and optionally valve metal strips without voids, said strips having an electrocatalytic surface and being disposed on the surface of the concrete structure, connected together to form the grid electrode, the ratio of grid electrode surface to the steel surface density being suitably selected to maintain a uniform cathodic protection current density throughout the concrete structure avoiding underprotection and/or overprotection areas. The present invention further discloses the method for forming said grid electrode onto the structure to be cathodically protected, covering the grid electrode with an ion conductive overlay and the structure prepared thereby.

ALUMINUM ALLOY FOR USE AS A GALVANIC OFFER ANODE

Anode structure for cathodic protection of steel-reinforced concrete and relevant method of use

The present invention relates to a method for cathodic protection of steel reinforced concrete which comprises using an anode structure made of an array of valve metal strips activated by an electrocatalytic coating and having voids therein, supported by or inserted into insulating spacers, said strips being connected by connection means either provided with voids or without voids, or rods, bars, insulated cables. The anode structure is applied to the reinforcing steel cage during Construction before the concrete is poured. The anode structure of the present invention exhibits a remarkable mechanical resistance and has an anode surface which may be tailored in order to provide for the necessary protection current on the basis of the density of the reinforcing bars contained in the structure to be cathodically protected.

Improvements in or relating to electrolytic cells having movable mercury cathode

Anode construction for the cathodic protection of steel reinforced concrete and relevant method for its use.

Linear anodic structure.

An advantageous anodic structure, particularly useful for cathodic protection of metal structures having a large linear extension, is made of an insulated power cable having suitable terminal at least at one end for the electrical connection to the positive pole of the electrical source and of a series of anodic segments distributed over the length of the power cable, coaxial with the cable itself and electrically connected through a leak-proof connection with the conductive core of the insulated power cable without interruption of the core continuity.

CATHODIC PROTECTION OF REINFORCED CONCRETE STRUCTURES

ELEKTROLYTISKT FOERFARANDE OCH ELEKTROLYTISK CELL FOER FRAMSTAELLNING AV ORGANISKA FOERENINGAR.

Anode structure for cathodic protection of steel-reinforced concrete and relevant method of use

The present invention relates to a method for cathodic protection of steel reinforced concrete which comprises using an anode structure made of an array of valve metal strips activated by an electrocatalytic coating and having voids therein, supported by or inserted into insulating spacers, said strips being connected by connection means either provided with voids or without voids, or rods, bars, insulated cables. The anode structure is applied to the reinforcing steel cage during construction before the concrete is poured. The anode structure of the present invention exhibits a remarkable mechanical resistance and has an anode surface which may be tailored in order to provide for the necessary protection current on the basis of the density of the reinforcing bars contained in the structure to be cathodically protected.

Electrolytic cell for preparing organic compounds

PERMANENT REFERENCE ELECTRODE FOR THE MEASUREMENT OF THE ELECTROCHEMICAL POTENTIAL OF METAL REINFORCEMENT IN CONCRETE.

ANOTHING DEVICE FOR CATHODIC PROTECTION OF STEEL ALARMED CONCRETE AND PROCEDURE FOR ITS USE

Impressed current cathodic protection of off-shore platforms utilizing the tensioned anode ropes system

"IMPRESSED CURRENT CATHODIC PROTECTION OF OFF-SHORE PLATFORMS UTILIZING THE TENSIONED ANODE ROPES SYSTEM" ABSTRACT The present invention concerns a system for cathodic protection of off-shore structures, by the impressed current method, which system comprises tubular anode assemblies (1, 1'), coaxially applied onto power supply cables (4), supported by ropes (5) tensioned between anchoring bodies (15) and the structure to be protected (17) or directly supported by the structure to be protect-ed. The tubular anodes, the relevant hydraulic sealings and electrical connections and the power supply cables (4) are not subjected to the mechanical stresses affecting the support.

Measurement of electrochemical potential in low electrical conductivity environments

An apparatus for monitoring the electrochemical potential of a metallic structure comprising the metallic structure to be monitored and a reference electrode connected to one another by at least one connector made of a polymer with ion exchange char­acteristics for reliable, long-term monitoring for 10 to 20 years.

Impressed current cathodic protection of off-shore platforms utilizing the tensioned anode ropes system

ELECTROLYTIC PROCEDURE FOR THE PURIFICATION OF CONTAMINATED CAUSTIC SOLUTIONS.

Diluted and contaminated caustic solutions coming from the regeneration and washing of ion exchange resins may advantageously be purified and reconcentrated to be reused during the subsequent regeneration cycles, by subjecting the contaminated solution to electrolysis in the anodic compartment of an electrolytic cell provided with a cation-exchange membrane and recovering concentrated and purified caustic solution from the cathodic compartment of the cell, whereto demineralized water is fed. The process of the invention may advantageously be carried out in subsequent electrolytic stages in order to maintain optimum working conditions and a high overall efficiency of the process.

Metodo per la misura del potenziale elettrochimico di strutture metalliche in ambienti a bassa conducibilita' elettrica e dispositivi necessari alla sua realizzazione.

Verfahren zum elektrischen verbinden nichtkorrodierbarer anoden mit dem korrodierbaren kern eines kraftliefernden, mit standardisoliermaterial isolierten leistungsversorgungskabels.

Vorverpackte geerdete anodeneinrichtung mit bettungsmaterial in einer flexiblen struktur fuer den kathodischen schutz mit aufgedruckten stroemen.

Anodo dispersore preimpaccato con backfill in struttura flessibileper protezione catodica con correnti impresse.

Anodenkonstruktion für den kathodischen schutz von stahlverstärktem beton und relevante methode zu seiner verwendung.

Procedimento per effettuare la connessione elettrica di anodi noncorrodibili all'anima corrodibile del cavo di alimentazione.

Cavo con cavita' stagne atte a contenere sensori fisici collegati elettricamente con l'esterno

Impianto di protezione catodica acorrente impressa di piattaforme petrolifere in mare.

Protezione catodica di strutture in cemento armato

Protezione catodica di strutture in cemento armato

Struttura elettrodica di controllo per protezione catodica.

Struttura elettrodica di controllo per protezione catodica

Elettrodo di riferimento di lunga durata per il controllo della protezione catodica nel terreno.

Struttura anodica per protezione catodica con correnti impresse e dispositivi per il montaggio della stessa attraverso pareti,a tenuta stagna

Elektrodeneinrichtung fuer die ueberwachung von kathodisch geschuetzten strukturen.

Electrode assembly for monitoring of cathodic protection

Stessa attraverso pareti, a tenuta struttura anodica per protezione stagna. catodica con correnti impresse e dispositivi per il montaggio della

Cavo con cavita' stagne atte a contenere sensori fisici collegati elettricamente con l'esterno.

System und seine anwendung zum sammeln von chemisch-physikalischen, elektrochemischen und mechanischen parametern fuer das planen und/oder betreiben von anlagen fuer den kathodischen schutz.

Elettrodo di riferimento di lunga durata per il controllo della protezione catodica nel terreno

Dispositivo e metodo relativo per la raccolta di parametri chimicofisici, elettrochimici e meccanici per la progettazione e/o l'esercizio di impianti diprotezione catodica.

System und seine anwendung zum sammeln von chemisch-physikalischen, elektrochemischen und mechanischen parametern fuer das planen und/oder betreiben von anlagen fuer den kathodischen schutz.

Maaling av elektrokjemisk potensial i miljoeer med lav elektrisk konduktivitet.