BE765197A - PROCESS FOR INCREASING THE CORROSION RESISTANCE OF AUSTENITIC CHROME-NICKEL STEELS - Google Patents

PROCESS FOR INCREASING THE CORROSION RESISTANCE OF AUSTENITIC CHROME-NICKEL STEELS

Info

Publication number
BE765197A
BE765197A BE765197A BE765197A BE765197A BE 765197 A BE765197 A BE 765197A BE 765197 A BE765197 A BE 765197A BE 765197 A BE765197 A BE 765197A BE 765197 A BE765197 A BE 765197A
Authority
BE
Belgium
Prior art keywords
increasing
corrosion resistance
nickel steels
austenitic chrome
austenitic
Prior art date
Application number
BE765197A
Other languages
French (fr)
Original Assignee
Stamicarbon
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 filed Critical Stamicarbon
Publication of BE765197A publication Critical patent/BE765197A/en

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)
BE765197A 1970-04-02 1971-04-02 PROCESS FOR INCREASING THE CORROSION RESISTANCE OF AUSTENITIC CHROME-NICKEL STEELS BE765197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7004678.A NL164328C (en) 1970-04-02 1970-04-02 PROCESS FOR INCREASING RESISTANCE TO CORROSION OF AUSTENITIC CHROME-NICKEL SAMPLES, AND METHOD FOR PREPARING UREA IN APPARATUS THEREFORE INCREASED IN RESISTANCE TO CORROSION.

Publications (1)

Publication Number Publication Date
BE765197A true BE765197A (en) 1971-10-04

Family

ID=19809733

Family Applications (1)

Application Number Title Priority Date Filing Date
BE765197A BE765197A (en) 1970-04-02 1971-04-02 PROCESS FOR INCREASING THE CORROSION RESISTANCE OF AUSTENITIC CHROME-NICKEL STEELS

Country Status (9)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033766A3 (en) * 2001-10-16 2003-10-30 Unilever Plc Corrosion protection process

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2503763C3 (en) * 1975-01-30 1978-03-16 Uranit Uran-Isotopentrennungs- Gesellschaft Mbh, 5170 Juelich Process for the formation of a corrosion-preventing, oxidic protective layer on corrosion-sensitive steels
EP0096151B1 (en) * 1982-06-03 1986-07-23 Montedison S.p.A. Method for avoiding the corrosion of strippers in urea manufacturing plants
CH691479A5 (en) 1996-12-06 2001-07-31 Siemens Ag Surface treatment of steel.
JP4112056B2 (en) * 1997-12-18 2008-07-02 東洋エンジニアリング株式会社 Improved urea synthesis method and apparatus
WO2003018861A1 (en) * 2001-08-31 2003-03-06 Dsm Ip Assets B.V. Process for rendering metals corrosion resistant
ITMI20120013A1 (en) 2012-01-09 2013-07-10 Saipem Spa PROCEDURE FOR THE SYNTHESIS OF UREA INCLUDING A STRIPPER FUND OF PASSIVATION
JPWO2014192823A1 (en) 2013-05-28 2017-02-23 東洋エンジニアリング株式会社 Urea synthesis method

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 (en) * 1953-04-15
US2890974A (en) * 1957-12-02 1959-06-16 Fairchild Engine & Airplane Passivation of stainless steel alloys

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033766A3 (en) * 2001-10-16 2003-10-30 Unilever Plc Corrosion protection process

Also Published As

Publication number Publication date
DE2116201A1 (en) 1971-11-04
US3720548A (en) 1973-03-13
CA949436A (en) 1974-06-18
NL164328C (en) 1980-12-15
GB1287710A (en) 1972-09-06
FR2085804B1 (en) 1974-03-08
NL164328B (en) 1980-07-15
ES389762A1 (en) 1973-06-01
FR2085804A1 (en) 1971-12-31
NL7004678A (en) 1971-10-05
JPS515630B1 (en) 1976-02-21

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: STAMICARBON N.V.

Effective date: 19840402