IT1251524B - Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione - Google Patents

Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione

Info

Publication number
IT1251524B
IT1251524B ITMI910715A ITMI910715A IT1251524B IT 1251524 B IT1251524 B IT 1251524B IT MI910715 A ITMI910715 A IT MI910715A IT MI910715 A ITMI910715 A IT MI910715A IT 1251524 B IT1251524 B IT 1251524B
Authority
IT
Italy
Prior art keywords
passivation
conditions
metal surfaces
promoting agents
corrosion promoting
Prior art date
Application number
ITMI910715A
Other languages
English (en)
Inventor
Vincenzo Lagana
Original Assignee
Vincenzo Lagana
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vincenzo Lagana filed Critical Vincenzo Lagana
Publication of ITMI910715A0 publication Critical patent/ITMI910715A0/it
Priority to ITMI910715A priority Critical patent/IT1251524B/it
Priority to AT92103043T priority patent/ATE146230T1/de
Priority to DE69215721T priority patent/DE69215721D1/de
Priority to EP92103043A priority patent/EP0504621B1/en
Priority to US07/846,537 priority patent/US5306355A/en
Priority to CN92101789A priority patent/CN1040463C/zh
Priority to SU925011161A priority patent/RU2070230C1/ru
Priority to CA002063344A priority patent/CA2063344C/en
Publication of ITMI910715A1 publication Critical patent/ITMI910715A1/it
Application granted granted Critical
Publication of IT1251524B publication Critical patent/IT1251524B/it

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/04—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds from carbon dioxide and ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C23C8/12—Oxidising using elemental oxygen or ozone
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/10—Oxidising
    • C23C8/12—Oxidising using elemental oxygen or ozone
    • C23C8/14—Oxidising of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

Metodo per la passivazione delle superfici metalliche specie in acciai inossidabili, titanio ecc., delle apparecchiature utilizzate in processi chimici, nei quali si formano elementi e composti ad azione corrosiva specie in condizioni di temperature e pressioni superiori a quelle ambientali, nel quale metodo si utilizza come agente passivante principale l'ossigeno (aria), in combinazione con almeno un secondo agente ausiliario, caratterizzato dal fatto che questo ultimo agente è ozono.
ITMI910715A 1991-03-18 1991-03-18 Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione IT1251524B (it)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ITMI910715A IT1251524B (it) 1991-03-18 1991-03-18 Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione
AT92103043T ATE146230T1 (de) 1991-03-18 1992-02-24 Verfahren zum passivieren von metalloberflächen angegriffen durch betriebsbedingungen und korrosionsförderende medien
DE69215721T DE69215721D1 (de) 1991-03-18 1992-02-24 Verfahren zum Passivieren von Metalloberflächen angegriffen durch Betriebsbedingungen und korrosionsförderende Medien
EP92103043A EP0504621B1 (en) 1991-03-18 1992-02-24 Method for the passivation of metal surfaces affected by operating conditions and agents promoting corrosion
US07/846,537 US5306355A (en) 1991-03-18 1992-03-04 System for the passivation of metal surfaces affected by operating conditions and agents promoting corrosion
CN92101789A CN1040463C (zh) 1991-03-18 1992-03-16 具有金属表面的尿素合成和处理设备的钝化方法
SU925011161A RU2070230C1 (ru) 1991-03-18 1992-03-17 Способ пассивирования металлических поверхностей
CA002063344A CA2063344C (en) 1991-03-18 1992-03-18 System for the passivation of metal surfaces affected by operating conditions and agents promoting corrosion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI910715A IT1251524B (it) 1991-03-18 1991-03-18 Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione

Publications (3)

Publication Number Publication Date
ITMI910715A0 ITMI910715A0 (it) 1991-03-18
ITMI910715A1 ITMI910715A1 (it) 1992-09-18
IT1251524B true IT1251524B (it) 1995-05-16

Family

ID=11359091

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI910715A IT1251524B (it) 1991-03-18 1991-03-18 Metodo per la passivazione delle superfici metalliche interessate da condizioni e agenti promotori di corrosione

Country Status (8)

Country Link
US (1) US5306355A (it)
EP (1) EP0504621B1 (it)
CN (1) CN1040463C (it)
AT (1) ATE146230T1 (it)
CA (1) CA2063344C (it)
DE (1) DE69215721D1 (it)
IT (1) IT1251524B (it)
RU (1) RU2070230C1 (it)

Families Citing this family (26)

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Publication number Priority date Publication date Assignee Title
DE4242967A1 (de) * 1992-12-18 1994-06-23 Messer Griesheim Gmbh Verfahren zum Spülen und Rekonditionieren von Transfersystemen
JP2987754B2 (ja) * 1996-01-17 1999-12-06 岩谷産業株式会社 高純度ガスの配管路での不動態化処理方法
CA2413888A1 (en) * 2000-06-22 2001-12-27 United States Filter Corporation Corrosion control utilizing a hydrogen peroxide donor
US6716359B1 (en) 2000-08-29 2004-04-06 United States Filter Corporation Enhanced time-based proportional control
NL1016121C2 (nl) * 2000-09-07 2002-03-11 Dsm Nv Methode voor het corrosiebestendig maken van metalen.
US6620315B2 (en) 2001-02-09 2003-09-16 United States Filter Corporation System for optimized control of multiple oxidizer feedstreams
US6776926B2 (en) 2001-08-09 2004-08-17 United States Filter Corporation Calcium hypochlorite of reduced reactivity
CA2457200A1 (en) * 2001-08-31 2003-03-06 Dsm Ip Assets B.V. Process for rendering metals corrosion resistant
US6991735B2 (en) * 2002-02-26 2006-01-31 Usfilter Corporation Free radical generator and method
US7108781B2 (en) * 2002-02-26 2006-09-19 Usfilter Corporation Enhanced air and water purification using continuous breakpoint halogenation with free oxygen radicals
US10343939B2 (en) 2006-06-06 2019-07-09 Evoqua Water Technologies Llc Ultraviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
WO2007146671A2 (en) 2006-06-06 2007-12-21 Fluid Lines Ultaviolet light activated oxidation process for the reduction of organic carbon in semiconductor process water
US20080245737A1 (en) * 2007-04-03 2008-10-09 Siemens Water Technologies Corp. Method and system for providing ultrapure water
US9365436B2 (en) 2007-04-03 2016-06-14 Evoqua Water Technologies Llc Method of irradiating a liquid
US8961798B2 (en) 2007-04-03 2015-02-24 Evoqua Water Technologies Llc Method for measuring a concentration of a compound in a liquid stream
US9365435B2 (en) 2007-04-03 2016-06-14 Evoqua Water Technologies Llc Actinic radiation reactor
US8753522B2 (en) 2007-04-03 2014-06-17 Evoqua Water Technologies Llc System for controlling introduction of a reducing agent to a liquid stream
US9725343B2 (en) 2007-04-03 2017-08-08 Evoqua Water Technologies Llc System and method for measuring and treating a liquid stream
US8741155B2 (en) 2007-04-03 2014-06-03 Evoqua Water Technologies Llc Method and system for providing ultrapure water
EP2393910A4 (en) 2009-02-09 2013-04-17 Advanced Biocatalytics Corp COMPOSITIONS AND METHODS FOR CLEANING BURNED FOOD AND OIL RESIDUES
US8591730B2 (en) 2009-07-30 2013-11-26 Siemens Pte. Ltd. Baffle plates for an ultraviolet reactor
US20140076462A1 (en) * 2011-03-23 2014-03-20 Ningxia Orient Tantalum Industry Co., Ltd. Method for passivating tantalum metal surface and apparatus thereof
EP2527301B1 (en) 2011-05-26 2016-04-27 Evoqua Water Technologies GmbH Method and arrangement for a water treatment
ITMI20120013A1 (it) 2012-01-09 2013-07-10 Saipem Spa Procedimento per la sintesi di urea comprendente un flusso di passivazione a fondo stripper
US11161762B2 (en) 2015-01-21 2021-11-02 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation
US10494281B2 (en) 2015-01-21 2019-12-03 Evoqua Water Technologies Llc Advanced oxidation process for ex-situ groundwater remediation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1027202A (fr) * 1949-11-05 1953-05-08 Procédé pour l'obtention de revêtements protecteurs de très liaute résistance
EP0096151B1 (en) * 1982-06-03 1986-07-23 Montedison S.p.A. Method for avoiding the corrosion of strippers in urea manufacturing plants
US5188714A (en) * 1991-05-03 1993-02-23 The Boc Group, Inc. Stainless steel surface passivation treatment

Also Published As

Publication number Publication date
DE69215721D1 (de) 1997-01-23
CN1040463C (zh) 1998-10-28
ITMI910715A1 (it) 1992-09-18
US5306355A (en) 1994-04-26
EP0504621B1 (en) 1996-12-11
CN1069293A (zh) 1993-02-24
CA2063344A1 (en) 1992-09-19
ITMI910715A0 (it) 1991-03-18
RU2070230C1 (ru) 1996-12-10
CA2063344C (en) 2001-07-03
EP0504621A1 (en) 1992-09-23
ATE146230T1 (de) 1996-12-15

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