FR2085804B1 - - Google Patents

Info

Publication number
FR2085804B1
FR2085804B1 FR7111732A FR7111732A FR2085804B1 FR 2085804 B1 FR2085804 B1 FR 2085804B1 FR 7111732 A FR7111732 A FR 7111732A FR 7111732 A FR7111732 A FR 7111732A FR 2085804 B1 FR2085804 B1 FR 2085804B1
Authority
FR
France
Legal status (The legal status 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 status listed.)
Expired
Application number
FR7111732A
Other versions
FR2085804A1 (fr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of FR2085804A1 publication Critical patent/FR2085804A1/fr
Application granted granted Critical
Publication of FR2085804B1 publication Critical patent/FR2085804B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
    • 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
    • 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
    • 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
    • C23C8/02—Pretreatment of the material to be coated
    • 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)
  • General Chemical & Material Sciences (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
FR7111732A 1970-04-02 1971-04-02 Expired FR2085804B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7004678.A NL164328C (nl) 1970-04-02 1970-04-02 Werkwijze voor het verhogen van de weerstand tegen cor- rosie van austenitische chroom-nikkelstalen, alsmede werkwijze voor de bereiding van ureum in apperatuur waarvan de weerstand tegen corrosie aldus is verhoogd.

Publications (2)

Publication Number Publication Date
FR2085804A1 FR2085804A1 (fr) 1971-12-31
FR2085804B1 true FR2085804B1 (fr) 1974-03-08

Family

ID=19809733

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7111732A Expired FR2085804B1 (fr) 1970-04-02 1971-04-02

Country Status (9)

Country Link
US (1) US3720548A (fr)
JP (1) JPS515630B1 (fr)
BE (1) BE765197A (fr)
CA (1) CA949436A (fr)
DE (1) DE2116201A1 (fr)
ES (1) ES389762A1 (fr)
FR (1) FR2085804B1 (fr)
GB (1) GB1287710A (fr)
NL (1) NL164328C (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503763C3 (de) * 1975-01-30 1978-03-16 Uranit Uran-Isotopentrennungs- Gesellschaft Mbh, 5170 Juelich Verfahren zur Bildung einer korrosionsverhütenden, oxidischen Schutzschicht auf korrosionsempfindlichen Stählen
DE3364579D1 (en) * 1982-06-03 1986-08-28 Montedison Spa Method for avoiding the corrosion of strippers in urea manufacturing plants
CH691479A5 (de) * 1996-12-06 2001-07-31 Siemens Ag Oberflächenbehandlung von Stahl.
JP4112056B2 (ja) * 1997-12-18 2008-07-02 東洋エンジニアリング株式会社 改良された尿素の合成方法および装置
CA2457200A1 (fr) * 2001-08-31 2003-03-06 Dsm Ip Assets B.V. Procede permettant de rendre des metaux resitants a la corrosion
GB0124846D0 (en) * 2001-10-16 2001-12-05 Unilever Plc Corrosion protection process
ITMI20120013A1 (it) 2012-01-09 2013-07-10 Saipem Spa Procedimento per la sintesi di urea comprendente un flusso di passivazione a fondo stripper
WO2014192823A1 (fr) 2013-05-28 2014-12-04 東洋エンジニアリング株式会社 Procédé de synthèse d'urée

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2576680A (en) * 1945-09-15 1951-11-27 Electro Chimie Metal Method for increasing the resistance to corrosion of stainless steel
US2680766A (en) * 1951-03-23 1954-06-08 Du Pont Method of inhibiting corrosion in urea synthesis reactors
BE527914A (fr) * 1953-04-15
US2890974A (en) * 1957-12-02 1959-06-16 Fairchild Engine & Airplane Passivation of stainless steel alloys

Also Published As

Publication number Publication date
CA949436A (en) 1974-06-18
US3720548A (en) 1973-03-13
DE2116201A1 (de) 1971-11-04
BE765197A (fr) 1971-10-04
GB1287710A (en) 1972-09-06
JPS515630B1 (fr) 1976-02-21
NL164328B (nl) 1980-07-15
NL7004678A (fr) 1971-10-05
ES389762A1 (es) 1973-06-01
FR2085804A1 (fr) 1971-12-31
NL164328C (nl) 1980-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse