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| Number | Title | Issue Date |
| 7422789 | Cathodic protection coatings containing carbonaceous conductive media A cathodic protection polymeric compound is disclosed. The compound has flowable material to serve as a binder, carbonaceous conductive media dispersed in the flowable material, sacrificial metal particles also dispersed in the flowable material. The carbonaceous co... | 09/09/2008 |
| 7350565 | Self-expandable cylinder in a downhole tool A self-expandable cylinder insertable into the bore of a downhole tool includes a resilient material rolled into a substantially cylindrical shape. The outside circumference of the self-expandable cylinder is variable to allow the self-expandable cylinder to be inse... | 04/01/2008 |
| 7329336 | Stabilizer with cathodic protection A cathodic protection system for protecting an underwater structure includes a plurality of blocks which are capable of conforming to various structures. Each of the blocks include: a flexible wire rope, the rope constructed and ar... | 02/12/2008 |
| 7318889 | Apparatus, system and method for extending the life of sacrificial anodes on cathodic protection systems An apparatus, system, method and computer program product directed to controlling corrosion of a conductive structure in contact with a corrosive environment and electrically connected to one or more anodes, wherein the anodes are less noble than the conductive stru... | 01/15/2008 |
| 7316245 | Fluid flow control device A flow control device having no moving parts that controls fluid flow along a fluid pathway in such a way that flow rate remains constant irregardless of environmental changes. The device achieves a constant flow rate by taking advantage of the properties of the flu... | 01/08/2008 |
| 7258780 | Corrosion protection apparatus and method An apparatus and method for protecting a structure from corrosion, according to which the apparatus includes two pivotally connected members, at least one anode device connected to at least one of the members, and a resilient component engaged with the members. ... | 08/21/2007 |
| 7235961 | Method for managing corrosion of an underground structure A method for managing corrosion of an underground structure includes placing an anode in the ground and electrically connecting it to the underground structure. Access to the ground is obtained through a container at least partially buried in the ground, such that t... | 06/26/2007 |
| 7192656 | Zinc galvanizing method for a single surface of a metal tube A zinc galvanizing method for a single surface of a metal tube includes a first step of preparing metal tubes, a second step of galvanizing the metal tubes, a third step of acid washing, a fourth step of washing the metal tubes with water, and a final fifth step of ... | 03/20/2007 |
| 7182852 | Cryogenic tank testing method including cathodic protection The present invention provides a method of testing a cryogenic metal tank before it is put into service, in which said method said tank (1) is filled with water and appropriate measurements are performed where necessary, the method being characterized in that... | 02/27/2007 |
| 7147768 | Electrochemical scale inhibition A process of reducing scaling of a metal surface exposed to an aqueous solution from which scale may form after a period of exposure. The process comprises applying a cathodic potential to the surface for at least some of the period of exposure. In some cases, e.g. ... | 12/12/2006 |
| 7097746 | Anodic protection of electrical contacts An anode protection device and method are provided. The method includes placing a sacrificial anode in proximity to the positive and negative contacts to shield or distort the field therebetween which provides preferential corrosion of the sacrificial anode, instead... | 08/29/2006 |
| 6896779 | Corrosion sensor A system using tank corrosion sensors to provide for an overall assessment and monitoring of the electro-chemical corrosion and coatings condition in ships' tanks, and particularly in ships' seawater or compensated fuel tanks. The system includes reference half-cell... | 05/24/2005 |
| 6890420 | Semiconductive polymeric system, devices incorporating the same, and its use in controlling corrosion A semiconductor system is provided that uses semiconductive organic polymers, electronics and semiconductor technology to provide a wide array of semiconductor components and a system of preventing corrosion of a surface of a metal structure in contact with a corros... | 05/10/2005 |
| 6811681 | Semiconductive corrosion and fouling control apparatus, system, and method An apparatus, system, method and computer program product directed to controlling corrosion of a conductive structure in contact with a corrosive environment and coated with a semiconductive coating, where the corrosion is controlled by a controllable filter and a c... | 11/02/2004 |
| 6793800 | Cathodic protection of steel within a covering material Cathodic protection of an existing concrete structure, including a steel member at least partly buried, such as steel rebar, in the concrete structure, is provided by embedding anodes into a fresh concrete layer applied over an excavated patch and/or as a covering o... | 09/21/2004 |
| 6692633 | Sacrificial anode for corrosion protection of semiconductor metallization during sawing Resistance to corrosion of aluminum metallization on semiconductor devices during wafer sawing process is provided by a sacrificial anode containing magnesium in contact with the integrated circuit wafer and the dicing saw. A relatively thin film or disc ... | 02/17/2004 |
| 6551491 | Method and system of preventing corrosion of conductive structures A system for preventing corrosion of a surface of a metal structure in contact with a corrosive environment comprising: (a) a semiconductive coating in conductive contact with at least part of the surface; and (b) an electronic filter for filtering corrosive n... | 04/22/2003 |
| 6524466 | Method and system of preventing fouling and corrosion of biomedical devices and structures A system for preventing corrosion and/or fouling of a surface of a biomedical device in contact with a corrosive environment comprising: (a) a semiconductive coating in conductive contact with at least part of the surface; and (b) an electronic filter for filt... | 02/25/2003 |
| 6471851 | Cathodic protection system Humectants are applied to cathodic protection systems which utilize thermally-sprayed zinc or zinc alloy anodes applied to the surface of reinforced concrete structures. The humectants are deliquescent or hygroscopic organic or inorganic salts, hydrophili... | 10/29/2002 |
| 6425997 | Process for removal of chloride ions from steel surfaces A process for removing chloride ions from steel surfaces and measuring the amount present on the steel surface being tested employs a high frequency waveform alternating current treatment as a pre-measurement step to liberate the chloride ions into deioni... | 07/30/2002 |
| 6402933 | Method and system of preventing corrosion of conductive structures A system for preventing corrosion of a surface of a metal structure in contact with a corrosive environment comprising: (a) a semiconductive organic polymer coating in conductive contact with at least part of the surface; and (b) an electronic filter for filte... | 06/11/2002 |
| 6331242 | Anodic encasement corrosion protection system for underground storage tanks, and metallic components thereof Corrosible metallic elements of tank are protected by an anodic encasement sleeve. The anodic encasement sleeve employs an inner sacrificial anodic layer and an outer environmental barrier layer to provide both cathodic and barrier protection against corr... | 12/18/2001 |
| 6325915 | Method and system of preventing corrosion of conductive structures A system for preventing corrosion of a surface of a metal structure in contact with a corrosive environment comprising: (a) a semiconductive coating in conductive contact with at least part of the surface; and (b) an electronic filter for filtering corrosive n... | 12/04/2001 |
| 6303017 | Cathodic protection of reinforced concrete Reinforcement in concrete is cathodically protected by galvanically connecting a sacrificial anode, such as a zinc or zinc alloy anode, to the reinforcement, and contacting the anode with an electrolyte solution having a pH which is maintained sufficientl... | 10/16/2001 |
| 6224743 | Cathodic protection methods and apparatus Apparatus, compositions and methods provide cathodic protection to a structure by placing an anode layer (10) directly between the structure (22) and its underlying foundation (30). Structures contemplated to be protected in this manner include especially... | 05/01/2001 |
| 6033553 | Cathodic protection system The present invention relates to the field of cathodic protection of reinforced concrete. A conductive metal is thermally applied onto an exposed surface of the concrete in an amount effective to form an anode on the surface. This establishes an interface... | 03/07/2000 |
| 5750071 | Corrosion protection employing alternating voltage A method of protecting metals from corrosion by applying an alternating voltage to them, thereby reversing the metal's polarity with respect to its surroundings. Particular applications are for metals which are buried in soil or are exposed to an electrol... | 05/12/1998 |
| 5714045 | Jacketed sacrificial anode cathodic protection system A jacketed anode assembly for use in a sacrificial anode cathodic protection system deployed to impede corrosion of steel or steel reinforcement in pilings or similar supporting columns. A non-conductive jacket formed of mating shell halves is lined along... | 02/03/1998 |
| 5667649 | Corrosion-resistant ferrous alloys for use as impressed current anodes Impressed current anodes such as cathodic protection anodes comprise iron based alloys including less than 70% iron and less than 0.1% carbon. Additional components may include molybdenum, chromium, nickel and others. The iron based alloy may itself compr... | 09/16/1997 |
| 5650060 | Ionically conductive agent, system for cathodic protection of galvanically active metals, and method and apparatus for using same An ionically conductive agent having means for reducing passivation of metal subject to anodic dissolution is disclosed. The ionically conductive agent is interposed between metal to be protected from corrosion and metal to be sacrificed to provide cathod... | 07/22/1997 |
| 5643424 | Apparatus for the prevention of fouling and/or corrosion of structures in seawater, brackish water and/or fresh water A device and method for preventing fouling and/or corrosion of the exposed surfaces of a structure which is in contact with seawater, brackish water, fresh water, or a combination of these. The system includes using a structure having an exposed zinc-cont... | 07/01/1997 |
| 5630934 | In-situ treatment system for inhibiting the formation of, and for alleviating, acidity in water Treatment is described for acidity caused by water seeping down through a seam of acid-generating mineral such as pyrite. The pyrite oxidises through exposure to the atmosphere (as a result of mine workings). The treatment system creates an galvanic cell,... | 05/20/1997 |
| 5505826 | Hydrophilic anode corrosion control system A method and apparatus for reducing corrosion on the interior and exterior of a fuel storage tank. A galvanic anode assembly is placed within the interior of or exterior to the fuel storage tank and is surrounded by a layer of hydrophilic gel. The hydroph... | 04/09/1996 |
| 5480521 | Tendon foundation guide cone assembly and anode A method of providing a cathodic protection to an installed pile is disclosed in which a plurality of anodes are provided on a tendon foundation guide assembly which is attached to a lowering unit and lowered to the pile. The tendon foundation guide assem... | 01/02/1996 |
| 5423631 | Antifouling structures The invention provides an antifouling structure that excels in antifouling performance and durability, dispenses with maintenance work, poses no toxicity problem, and is easily handled. The antifouling structure is in a flexible thin sheet, and comprises ... | 06/13/1995 |
| 5415745 | Method for providing cathodic protection to underground metallic structure using galvanic anodes A method of providing cathodic protection to underground metallic structures which comprises creating an excavation spaced from the underground metallic structure and placing in the excavation a hollow casing having a perforate section, the hollow casing ... | 05/16/1995 |
| 5341562 | Method for preventing corrosion of a reinforced concrete structure A method for preventing corrosion of a reinforced concrete structure having a reinforcing steel embedded therein, which comprises coating an aggregate-containing primer on the surface of the reinforced concrete structure, to form a primer layer having a r... | 08/30/1994 |
| 5324397 | Method for inhibiting corrosion of carbon steel in contact with hydrofluoric acid and tetrahydrothiophene-1, 1-dioxide A method for inhibiting corrosion of carbon steel in contact with a mixture of hydrofluoric acid and tetrahydrothiophene-1,1-dioxide comprising raising the electrical potential of said structure such that the electrical potential of said structure is posi... | 06/28/1994 |
| 5292411 | Method and apparatus for cathodically protecting reinforced concrete structures Cathodic protection of a reinforced concrete structure utilizes a metal anode such as a zinc anode in combination with a pressure sensitive ionically conductive hydrogel in contact with at least a portion of the surface of the anode. Preferably, the anode... | 03/08/1994 |
| 5169266 | Corrosion resistant structure for soil reinforcement Method for the realization of soil reinforcement by means of cathodically polarized stainless steel units fearturing high corrosion resistance. The method applied foresees the use of stainless steel and carbon steel strips.... | 12/08/1992 |
