Matches 1 - 31 out of 31
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7582195 Cathodic protection system for non-isolated structures including a microprocessor control  
An active cathodic protection system, the apparatus comprising a rectifier element with at least one electrical connection to a source of electrical current, the rectifier element associated with a...
7241374 Pulsed electric field method and apparatus for preventing biofouling on aquatic surfaces  
An electrode system for preventing biofouling of a surface either is applied directly onto the surface of an aquatic vehicle or structure, if the surface is non-conducting; or is applied onto an...
7189319 Axial current meter for in-situ continuous monitoring of corrosion and cathodic protection current  
First and second axial current meters (ACM) are mechanically connected to a well casing just above and below a corrosive zone and a master axial current meter (MACM) is connected to the casing at...
6875336 Process and apparatus for preventing oxidation of metal  
An apparatus for prevention of corrosion in metal objects uses a capacitively coupled fastener or pad attached to a metal body being protected from corrosion. The metal body and the negative...
6506295 Cathodic protection method and device for metal structure  
A main anode and a pilot anode are mounted on a coating film of a metal structure, a cathode is mounted on a metal based material of the metal structure, a predetermined voltage is applied from the...
6322691 Method for passivating steel in large structures formed of steel-reinforced concrete  
An electro-chemical process for rehabilitating steel reinforced concrete, wherein a distributed flow of electrical current is established between internally embedded reinforcing steel, connected as...
6224742 Pulsed cathodic protection system and method  
A cathodic protection system for protecting buried conducting structures, subject to corrosion such as well casings, pipe lines and the like, utilizes a plurality of pulsed D.C. current sources...
6209472 Apparatus and method for inhibiting fouling of an underwater surface  
A system for inhibiting marine organism growth on underwater surfaces provides an electric current generator which causes an electric current to flow proximate the underwater surface. A source of...
6197168 Electrochemical stain prevention apparatus of submerged structure and process for producing submerged structure used in this apparatus  
An electrochemical stain prevention apparatus of a submerged structure comprising a submerged structure of which at least the stain prevention surface is formed of a conductive film that does not...
6024861 Electric anticorrosion method and apparatus  
In an electrically corrosion-proofing process in which the polarity of a metal member having a coating film is set at negative, the duration of setting the polarity of the metal member immersed in...
5868920 Method for inhibition of growth of organisms on faces of constructions submerged in a liquid  
The invention concerns a method for inhibition of growth of organisms on faces of constructions (11) submerged in a liquid. In themethod, an electrically conductive structure (11) to be protected...
5417820 Method to prevent adherence of marine organisms on surfaces of submerged components  
A method of minimizing adherence of living marine organisms on exposed surfaces of a component submerged in a fluid medium containing such organisms is provided. The method simultaneously minimizes...
5395491 Method for preventing sea water cells from being destroyed by biofouling  
This invention relates to a method and means for preventing or greatly reducing biological growth on the cathode (7, 11) of a sea water cell (1) which is based on electrolytic reaction between...
5344531 Prevention method of aquatic attaching fouling organisms and its apparatus  
This invention relates to a method of preventing or controlling aquatic attaching fouling organisms which comprises covering aquatic organisms attaching portions on the surfaces of submerged...
5324405 Pulse cathodic protection system  
A circuit and method of cathodically protecting ferrous metal structures such as pipelines or well casings is described disposed in a conductive medium such as the ground. A pair of terminals are...
5290407 System for controlling corrosion in an environment in which thin layers of low-pH corrosive fluids are formed  
A system for preventing corrosion of a metallic surface in an environment in which a corrosive condensate with a pH of less than about 3 tends to form on the surface exposed to the environment. The...
5141607 Method and apparatus for the removal of chlorides from steel reinforced concrete structures  
A method and apparatus for the removal of chlorides from steel reinforced concrete utilizes an electrode with a rectifier impressing a voltage between the steel of the concrete and the electrode....
5102514 Cathodic protection system using carbosil anodes  
An automotive cathodic protection apparatus applies direct current to an integrated circuit timer and power controller, which generates times output pulses. An output charge storing capacitor...
4823072 Measurement of the polarized potential of buried pipeline having impressed current cathodic protection  
A method for detecting the polarized potential of a buried pipe which is cathodically protected by rectified alternating current impressed upon the pipe. Each rectified protection current is...
4767512 Process and apparatus for preventing oxidation of metal by capactive coupling  
An effective process of preventing the oxidation of metal objects by capacitive coupling is disclosed. An electric current is impressed into the metal object by treating the metal object as the...
4627900 Electrochemical dissolution and control of nickel sulfide scale  
A method for electrochemically minimizing sulfide scale buildup on a metal surface by connecting the surface as an anode and periodically reversing the current flow at predetermined intervals.
4588022 Anodic protection system and method  
An anodic protection system particularly useful in heat exchangers for cooling sulphuric acid, in which the cathode projects through both ends of the heat exchanger and a negative potential is...
4440611 Cathodic electrochemical process for preventing or retarding microbial and calcareous fouling  
This invention relates to a method for preventing or retarding microbial or calcareous fouling of a conducting or semi-conducting surface in an aqueous environment. This method produces an...
4051436 Apparatus for and method of measuring polarization potential of a metallic structure  
An improved testing device and method to measure the degree of polarization potential on the interface of a metal structure and its environment where said structure is protected against corrosion...
4036716 Method to prevent the formation of incrustations on working electrodes in electrode steam generators or the like and a means for performing the method  
The present invention relates to electrically heated steam generators and means for preventing and removing incrustations due to hard water in such generators. According to the invention this is...
3766032 METHOD FOR CONTROL OF MARINE FOULING  
An electrical apparatus and method for eliminating the fouling of boat bottoms and the like by marine growth. The underwater surface is sheathed with strips of a metal such as stainless steel. An...
3661742 ELECTROLYTIC METHOD OF MARINE FOULING CONTROL  
An improved method of inhibiting the sustained attachment of marine organisms to metallic surfaces while preventing corrosion of the metallic surface by cathodic protection. Inhibition of marine...
3612898 PULSED CATHODIC PROTECTION APPARATUS AND METHOD  
A pulsed cathodic protection apparatus and method in which charging of the capacitor means is through the earth between an anode bed and the pipe or other element to be protected, thereby...
3483101 CONTROL SYSTEM AND METHOD FOR ANODIC PROTECTION  
3288694 Methods and apparatus for anodic protection of vessels  
3692650 Title is not available  
Matches 1 - 31 out of 31