Abstract:
A presente invenção se insere no campo das tecnologias de prevenção da bioincrustação de equipamentos flutuantes em ambiente marinho e outras estruturas, especialmente considerando o uso de dispositivos eletrônicos que auxiliam no processo de limpeza. Compreendendo as etapas de: Etapa 1) Identificação; Subetapa 1a) Localização; Subetapa 1b) Dimensionamento; Etapa 2) Limpeza; Etapa 3) Medição; Etapa 4) Compartimentação; Etapa 5) Acoplamento; Etapa 6) Inspeção, e Etapa 7) Redimensionamento Por meio das referidas etapas, o processo revelado na presente invenção possibilita a criação de campos elétricos criadores de perturbações ambientais, capazes de inibir incrustações de organismos sésseis no interior de porções de águas marítimas em condições dinâmicas e/ou estáticas, de navios, plataformas de exploração de petróleo, molhes, etc.
Abstract:
An apparatus, system, method and computer program product directed to controlling corrosion, particularly space weather induced 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 (898) and a corresponding electronic control unit (897) configured to process and adjust the controllable filter in response to at least one measured parameter associated with space weather effects on the conductive structure.
Abstract:
A concrete structure (11) is reinforced with steel rebars (12) coated with essentially pure aluminum (15) upon which aluminum coating is an aluminum oxide layer (15'). This layer of aluminum oxide is in direct contact with the concrete. The Al-coated rebars may be protected in a galvanic circuit using magnesium or other metal baser as a sacrificial anode, or the rebars are cathodically protected with an impressed cathodic current, the current density of which is derived by sensing the corrosion potential at a sensing member of essentially pure aluminum embedded in the concrete, or in concrete outside a zone immediately surrounding the rebars, measuring the corrosion potential at the sensing member relative to a reference electrode until the value stabilizes at a measured stable potential; then an impressed current lower than the corrosion potential of the sensing member is imposed.
Abstract:
A kit of parts suitable for use in a method of impressed current corrosion protection, and comprising (a) an elongate conductive member comprising a core comprising a material having a resistivity at 23 DEG C of less than 5 x 10 ohm cm, and a resistance at 23 DEG C of less than 0.03 ohm/m, and a conductive polymer element which surrounds and is in electrical contact with the core, and (b) a generally conically shaped member having a passageway extending substantially axially therethrough for receiving at least the core and conductive polymeric element.
Abstract:
Es wird ein elektromagnetisch betätigbares Einlassventil (24) für eine Hochdruckpumpe, insbesondere eines Kraftstoffeinspritzsystems, vorgeschlagen. Das Einlassventil (24) weist ein Ventilglied (34) auf, das zwischen einer Öffnungsstellung und einer Schließstellung bewegbar ist. Es ist ein elektromagnetischer Aktor (60) vorgesehen, durch den das Ventilglied (34) bewegbar ist, wobei der elektromagnetische Aktor (60) eine Magnetspule (64), einen Magnetkern (66) und einen zumindest mittelbar auf das Ventilglied (34) wirkenden Magnetanker (68) aufweist, der in einer Aufnahme (76) eines Trägerelements (78) in Richtung seiner Längsachse (69) verschiebbar geführt ist. Der Magnetkern (66) und das Trägerelement (78) sind von einem Gehäuse (70) umgeben. Im Gehäuse (70) ist in einem Zwischenraum (94) zwischen dem Gehäuse (70) einerseits und dem Trägerelement (78) und/oder dem Magnetkern (66) und/oder einem den Magnetkern (66) und das Trägerelement (78) miteinander verbindenden Verbindungselement (92) andererseits wenigstens eine Opferanode (96) angeordnet ist. Die wenigstens eine Opferanode (96) ist mit dem Trägerelement (78) und/oder dem Magnetkern (66) und/oder dem Verbindungselement (92) elektrisch leitfähig verbunden. Die wenigstens eine Opferanode (96) besteht aus einem unedleren Metall als das Trägerelement (78) und/oder der Magnetkern (66) und/oder das Verbindungselement (92).
Abstract:
This invention relates to compositions and methods for the at least partial dissolution, disruption and/or removal of deposits, such as scale and other deposits, from heat exchanger components. The heat exchanger components can include pressurized water reactor steam generators. The pressurized water reactor steam generators can be in a wet layup condition. The compositions include elemental metal and complexing agent selected from the group consisting of sequestering agent, chelating agent, dispersant, and mixtures thereof. The methods include introducing the compositions into the heat exchanger components.
Abstract:
The galvanic cathodic protection of reinforced concrete structures such as bridges, buildings, parking structures, piers, and wharves, is enhanced by the use of an inert water absorbent solid. The absorbent solid and chemicals are mixed with a cementitious binder to form an activating matrix. This matrix surrounds a sacrificial metal anode such as zinc, or aluminum or their alloys. The metal anode is electrically connected to the ferrous reinforcing member by a metallic conductor. The water absorbent solid may be a clay such as bentonite or a hydrated mineral such as vermiculite. It is preferably in the form of discrete particles dispersed throughout the binder. The inclusion of the absorbent solid in the activating matrix serves to increase the protective current, thereby reducing corrosion of the reinforcing components of the concrete structure.
Abstract:
A subsea pipeline power transmission system comprasing a pipeline (1), an electoral power supply (4) connected to the pipeline at a first location, and connection means provided on the pipeline at a second location for connection of a load (5) to the pipeline. Once connected the load 5 can receive electoral power from the power supply (4) via the pipeline (1). The pipeline has a plurality of cathodic protection anodes (2), each of which is electrically connected via respective impedance means to the pipeline.
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.
Abstract:
A fluid line component for a subsea umbilical has two metal tubes (4) joined to form a longer component, each tube (4) being coated with a protective layer (9) along their length except at the joint (10) between the two tubes (4), wherein a sacrificial anode material (11) is provided at the joint (10).