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Yao En Li, John Rizos, Gerhard Kasper: Process for passivating metal surfaces to enhance the stability of gaseous hydride mixtures at low concentration in contact therewith. American Air Liquide Chicago Research Center, Oblon Spivak McClelland Maier & Neustadt, January 2, 1996: US05480677 (17 worldwide citation)

A process for passivating a metal surface to enhance the stability of a gas mixture containing one or more gaseous hydrides in low concentration in contact therewith, which comprises:


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John A Kelly, Cynthia A Soderquist: Method of scavenging dissolved oxygen in steam generating equipment using ammonia or amine neutralized erythorbic acid. Nalco Chemical Company, Hosier Niro & Daleiden, December 6, 1983: US04419327 (14 worldwide citation)

A method of scavenging oxygen and passivating metal surfaces in steam generating equipment by treating feedwater with an ammonia or amine neutralized erythorbate form thereof.


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William P Banks, Larry D Martin: Passivating metal surfaces. Halliburton Company, Thomas R Weaver, John H Tregoning, August 30, 1977: US04045253 (9 worldwide citation)

A method for passivating acid-cleaned ferrous metal surfaces is disclosed. The method features the use of an aqueous passivating solution having a pH of greater than about 8, comprising a base, an oxygen containing gas, and one of hydrazine, an iron complexing agent and mixtures thereof, wherein the ...


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Roper Michael Dwin: Improvements relating to protective coatings and anti-corrosion treatments. Electro Chem Eng, March 18, 1970: GB1185019-A (3 worldwide citation)

1,185,019. Passivating metal surfaces. ELECTRO CHEMICAL ENG. CO. Ltd. Feb.21, 1968 [Dec. 7, 19661, No. 54743/66. Heading C7U. Zn, Cd or Sn surfaces are passivated by treating in a solution containing hexavalent Cr, nitrate ions, an inorganic acid sulphate ions and a salt of Ti and/or Zr. The surface ...


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Paolo B Giordani, Valentino Gasparetto, Dario Negri: Brightening/passivating metal surfaces without hazard from emissions of oxides of nitrogen. Henkel Kommanditgesellschaft auf Aktien, Woodcock Washburn, February 22, 2005: US06858097 (2 worldwide citation)

A chromium- and nitrogen-free brightening and passivating treatment for metal surfaces, particularly iron and steel, comprises: at least one acid; at least one substance containing a peroxy moiety; and at least one organic substance selected from the group consisting of; molecules that contain both ...


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Li Yao En, Rizos John, Kasper Gerhard: Process for passivating metal surfaces to enhance the stability of gaseous hydride mixtures at low concentration in contact therewith.. Air Liquide, December 9, 1992: EP0517576-A1

A process for passivating a metal surface to enhance the stability of a gas mixture containing one or more gaseous hydrides in low concentration in contact therewith, which comprises: a) purging gas in contact with said metal surface with inert gas to remove the purged gas, b) exposing the metal sur ...


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Carter M Silvernail, Erik C Olson, Michael E Besse: Freestanding detergent composition not requiring an automated dispenser. Ecolab USA, McKee Voorhees & Sease, May 30, 2017: US09663748

A solid controlled release composition according to the present invention includes at least one cellulosic material, water, at least one active ingredient, and optionally at least one of a saccharide, sugar alcohol or salt. The active ingredient can be a polycarboxylic acid.


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Solutions for treating metal surfaces, either bare or chemically-coated, to improve their corrosion resistance, methods of preparing such solutions, and treatment processes in which they are employed. Amchem, September 18, 1963: GB936937-A

Solutions for passivating metal surfaces or for aftertreatment of conversion coated surfaces comprise aqueous acidic solutions containing 0.15-800 gms./litre of total chromium (expressed as CrO3) in which 5-60% of the Cr4+ is reduced by formaldehyde which is preferably added in the molar ratio of 0. ...


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Martin Larry D, Banks William P: Methode de passivation des surfaces metalliques, Passivating metal surfaces. Halliburton Company, July 8, 1980: CA1081096

Abstract of the Disclosure A method for passivating acid-cleaned ferrousmetal surfaces is disclosed. The method features theuse of an aqueous passivating solution having a pH ofgreater than about 8, comprising a base, an oxygen con-taining gas, and one of hydrazine, an iron complexingagent and mixtu ...


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