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| Number | Title | Issue Date |
| 7837931 | Method of using solubilized transition metal oxides in well operations A corrosion inhibitor package containing an acetylenic amine or acetylenic alcohol enables a sulfur-free method for protecting metal tubulars and equipment. The package has particular applicability in the protection of carbon steel tubulars in high density brines at... | 11/23/2010 |
| 7264770 | Mitigation of stress corrosion cracking of structural materials exposed to a high temperature water A method for mitigating stress corrosion cracking of a component exposed to a high temperature water in a high temperature water system is provided. The method comprises the steps of lowering corrosion potential conditions to a desired low corrosion potential in the... | 09/04/2007 |
| 7252769 | Use of cerium salts to inhibit manganese deposition in water systems Methods to control manganese deposition in an aqueous system, which include introducing a cerium-containing composition, and optionally another deposit control agent, to the aqueous system, are described. Also described, are cerium-containing compositions that promo... | 08/07/2007 |
| 7147799 | Methods of using an oxygen scavenger An oxygen scavenging packet containing an iron-based oxygen scavenger and an electrolyte is set forth in which the rate of uptake of oxygen is increased by virtue of the introduction into the packet of an oxygen uptake accelerator containing water. Methods of increa... | 12/12/2006 |
| 7127959 | Process for assessing inhibition of petroleum corrosion The present invention is an apparatus for simulating corrosion activity in liquid and vapor/condensate corrosion environments. The apparatus includes a container, including a lower region containing the liquid and an upper region, including a condenser, a heater for... | 10/31/2006 |
| 7036983 | Thermocouple for use in gasification process An improved apparatus comprising a thermocouple for measuring the temperature in a gasification process is provided. The improvement comprises a sapphire envelope for enclosing at least a portion of the thermocouple. The sapphire envelope may be in the form of a sap... | 05/02/2006 |
| 6926846 | Methods of using an oxygen scavenger An oxygen scavenging packet containing an iron-based oxygen scavenger and an electrolyte is set forth in which the rate of uptake of oxygen is increased by virtue of the introduction into the packet of an oxygen uptake accelerator containing water. Methods of increa... | 08/09/2005 |
| 6811747 | Corrosion inhibitor The present invention relates to water treatment chemical formulations, and more particularly to chemical formulations used to treat water containing halogens as a sanitizing agent. The water treatment chemical formulations contain cyanuric acid and an alkali metal ... | 11/02/2004 |
| 6793883 | Application of catalytic nanoparticles to high temperature water systems to reduce stress corrosion cracking A method and system for reducing stress corrosion cracking in a hot water system, such as a nuclear reactor, by reducing the electrochemical corrosion potential of components exposed to high temperature water within the structure. The method includes the steps of: p... | 09/21/2004 |
| 6556642 | Inhibition method of the secondary side stress corrosion cracking in nuclear steam generator tubes The present invention relates to a method for inhibiting stress corrosion cracking occurring on steam generator tubes in the secondary side of nuclear power plants and an inhibitor therefor. The method comprises supplying cerium boride as an inhibitor for... | 04/29/2003 |
| 6551553 | Disinfection method A process is provided for disinfecting articles at temperatures below 5° C. with an aqueous alcoholic salt solution. The process provides a fast reduction of microorganisms at low temperatures with a wide degree of efficacy.... | 04/22/2003 |
| 6350410 | Method and composition for inhibiting biological fouling in an irrigation system The present invention provides a method and composition for inhibiting biological fouling in an irrigation system. According to the invention, an effective amount of active zinc is added to irrigation water passing through an irrigation system to inhibit ... | 02/26/2002 |
| 6277327 | Method for the anticorrosive treatment of waste plastics treating equipment This invention relates to equipment for treating the aforesaid waste plastics directly with supercritical water, and an object thereof is to provide a method for the anticorrosive treatment of waste plastics treating equipment which makes it possible to u... | 08/21/2001 |
| 6277302 | Inhibition of metal corrosion A composition and method is disclosed for inhibiting the corrosion of metals in contact with an aqueous system capable of corroding the metal. The inventive composition contains a substantially water-soluble polymer of an acidic amino acid and at least on... | 08/21/2001 |
| 6177047 | Water-treatment composition and method of use The invention herein relates to water-treatment technology, namely compositions comprising a phosphonic acid, a zinc salt and a metal salt. A preferred metal salt is aluminum tri-chloride whereas amino tris methylene phosphonic acid is a preferred phospho... | 01/23/2001 |
| 6106770 | Method for preventing obstruction in aluminum brass pipes in a water flow path A method for preventing obstruction in aluminum brass pipes in a water flow path, including the steps of continuously supplying iron ions or an iron ion supply compound to water in the water flow path in such a manner that a concentration of iron ions in ... | 08/22/2000 |
| 6080334 | Corrosion resistant buffer system for metal products A system is disclosed for inhibiting the corrosion of ferrous and other metals by passivating the metals. The system includes novel buffered compositions which may be applied to metal products, and novel combinations thereof with metals, for preventing or... | 06/27/2000 |
| 6071435 | Composition and process for treating a zinciferous surface To inhibit the blackening of zinciferous metal-plated steel sheet while also generating a good corrosion resistance, fingerprint resistance, and chromium fixation ratio for the steel sheet, it is coated with an aqueous liquid composition that has a pH not... | 06/06/2000 |
| 6019942 | Method of maintaining the corrosion resistance of a steel circulation system with a lead-containing coolant The method is to develop an anticorrosive cover out of oxides of structural steel components on a circuit internal surface in which in the course of the circuit operation, the oxygen concentration, which is dissolved in the coolant, is maintained not lowe... | 02/01/2000 |
| 5989322 | Corrosion inhibition method and inhibitor compositions The present invention provides a method and compositions useful for inhibiting corrosion of a corrodible metal resulting from contact of water and air with the metal. In this method, a stannous salt and a hydrocarbyl substituted succinimide of a polyethyl... | 11/23/1999 |
| 5985048 | Method for developing an enhanced oxide coating on a component formed from stainless steel or nickel alloy steel A method for creating an oxide coating on the surface of a component formed from austenitic stainless steel or nickel alloy steel is set forth. The component has a naturally formed oxide film at the surface. The naturally formed oxide is enhanced through ... | 11/16/1999 |
| 5858798 | Method and apparatus for detecting amines and ammonia by fluorescence Primary amines, ammonia, or mixtures thereof can be detected using a reagent comprising from about 650 ppm to about 25 percent by weight of phthalic dicarboxyaldehyde; from about 74 to about 99.88 percent by weight of an alkali metal borate; and, from abo... | 01/12/1999 |
| 5830383 | Method for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavenger A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: ##STR1## wherein each of R1, R2 and R3 which may be the same or d... | 11/03/1998 |
| 5818893 | In-situ palladium doping or coating of stainless steel surfaces A method for reducing corrosion of metal components in a water-cooled nuclear reactor. A compound containing a platinum group metal, e.g. palladium, is injected alone in small amounts into the high temperature water of the reactor in the form of a solutio... | 10/06/1998 |
| 5793830 | Metal alloy coating for mitigation of stress corrosion cracking of metal components in high-temperature water A method for mitigating crack initiation and propagation on the surface of metal components in a water-cooled nuclear reactor. A metal coating having an electrically insulating outer layer is applied on the surfaces of IGSCC-susceptible reactor components... | 08/11/1998 |
| 5773096 | Method of catalyst preparation by high-temperature hydrothermal incorporation of noble metals onto surfaces and matrices A method of depositing noble metals on surfaces or matrices to manufacture industrial catalysts that can be used in a variety of applications. Such deposition of noble metals can be achieved by treating the surfaces in high-temperature (150° C. or higher... | 06/30/1998 |
| 5774516 | Modification of oxide film electrical conductivity to maintain low corrosion potential in high-temperature water A method for mitigating general corrosion and crack initiation and growth on the surface of a metal components in a water-cooled nuclear reactor. A compound containing a non-noble metal such as zirconium or titanium is injected into the water of the react... | 06/30/1998 |
| 5768330 | Co-deposition of palladium during oxide film growth in high-temperature water to mitigate stress corrosion cracking A method for improving the performance and longevity of coatings of metal deposited from aqueous solutions of inorganic, organic or oraganometallic metal compounds. The method involves co-deposition of noble metal or corrosion-inhibiting non-noble metal d... | 06/16/1998 |
| 5683588 | Stabilization of catalyzed aqueous sulfite and bisulfite ion solutions A method for stabilizing an aqueous solution containing sulfite or bisulfite ions and a water-soluble metal catalyst. The method comprises incorporating a stabilizing amount of a alpha substituted carboxylic acid or salt thereof or a vinyl carboxylic acid... | 11/04/1997 |
| 5625656 | Method for monitoring noble metal distribution in reactor circuit during plant application A method for ensuring the distribution of noble metal in the reactor circuit during plant application without measuring the reactor water for noble metal content by chemical analysis. The method involves the measurement of electrochemical corrosion potent... | 04/29/1997 |
| 5608766 | Co-deposition of palladium during oxide film growth in high-temperature water to mitigate stress corrosion cracking A method for improving the performance and longevity of coatings of metal deposited from aqueous solutions of inorganic, organic or oraganometallic metal compounds. The method involves co-deposition of noble metal or corrosion-inhibiting non-noble metal d... | 03/04/1997 |
| 5602888 | Radiation-induced palladium doping of metals to protect against stress corrosion cracking A method for mitigating crack growth on the surface of stainless steel or other alloy components in a water-cooled nuclear reactor wherein a solution or suspension of a compound containing a noble metal is injected into the coolant water while the reactor... | 02/11/1997 |
| 5600692 | Method for improving tenacity and loading of palladium on palladium-doped metal surfaces A method for mitigating crack growth on the surface of stainless steel or other alloy components in a water-cooled nuclear reactor wherein a solution or suspension of a compound containing a noble metal is injected into the coolant water along with a redu... | 02/04/1997 |
| 5600691 | Noble metal doping or coating of crack interior for stress corrosion cracking protection of metals A method for mitigating crack growth on the surface of stainless steel or other metal components in a water-cooled nuclear reactor. A compound containing a noble metal, e.g., palladium, is injected into the water of the reactor in the form of a solution o... | 02/04/1997 |
| 5591381 | Corrosion inhibiting compositions and methods The present invention provides corrosion inhibiting compositions and methods whereby protective coatings are formed on metal surfaces. The compositions are basically comprised of a corrosion inhibiting condensation reaction product enhanced by the presenc... | 01/07/1997 |
| 5587109 | Method for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavenger A method of treating an aqueous system is described which comprises incorporating in the system a hydroxylamine derivative of the general formula: ##STR1## wherein each of R1, R2 and R3 which may be the same or d... | 12/24/1996 |
| 5512212 | Corrosion inhibitor composition and method of use A composition and method for inhibiting corrosion of iron and iron-containing metals in contact with aqueous systems containing sulfide compounds. The composition comprises (A) an aqueous solution of an alcohol, an acid, a fatty imidazoline, and an ethoxy... | 04/30/1996 |
| 5510057 | Corrosion inhibiting method and inhibition compositions The present invention provides a method and compositions useful for inhibiting corrosion of a corrodible metal resulting from contact of water and air with the metal. In this method, a stannous salt and a hydrocarbyl substituted succinimide of a polyethyl... | 04/23/1996 |
| 5435969 | Monitoring water treatment agent in-system concentration and regulating dosage A concentration-fluctuation responsive regulation of water treatment agent feed is achieved by adding an incipient to a sample whereby a concentration indicator is formed. Such a concentration indicator comprises a combination of the incipient reagent and... | 07/25/1995 |
| 5424007 | 1-methyl-3,5,7-triaza-1-azoniatricyclodecane compounds, a method for preparing these compounds, their use in the control of microorganisms in aqueous systems, and their use in the inhibition of corrosion Compounds of the formula ##STR1## wherein X is an anion selected from the group consisting of phosphate, borate and molybdate groups, and a method for making these compounds. The compounds are useful in the control of microorganisms in aqueous system... | 06/13/1995 |
