JPS515630B1 - - Google Patents
Info
- Publication number
- JPS515630B1 JPS515630B1 JP46020270A JP2027071A JPS515630B1 JP S515630 B1 JPS515630 B1 JP S515630B1 JP 46020270 A JP46020270 A JP 46020270A JP 2027071 A JP2027071 A JP 2027071A JP S515630 B1 JPS515630 B1 JP S515630B1
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
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- 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)
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 (1)
Publication Number | Publication Date |
---|---|
JPS515630B1 true JPS515630B1 (nl) | 1976-02-21 |
Family
ID=19809733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP46020270A Pending JPS515630B1 (nl) | 1970-04-02 | 1971-04-02 |
Country Status (9)
Country | Link |
---|---|
US (1) | US3720548A (nl) |
JP (1) | JPS515630B1 (nl) |
BE (1) | BE765197A (nl) |
CA (1) | CA949436A (nl) |
DE (1) | DE2116201A1 (nl) |
ES (1) | ES389762A1 (nl) |
FR (1) | FR2085804B1 (nl) |
GB (1) | GB1287710A (nl) |
NL (1) | NL164328C (nl) |
Families Citing this family (8)
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 |
JP2005501178A (ja) * | 2001-08-31 | 2005-01-13 | ディーエスエム アイピー アセッツ ビー.ブイ. | 金属を耐腐食性にする方法 |
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 |
CN105246874B (zh) | 2013-05-28 | 2018-06-12 | 东洋工程株式会社 | 尿素合成方法 |
Family Cites Families (4)
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 |
NL77361C (nl) * | 1953-04-15 | |||
US2890974A (en) * | 1957-12-02 | 1959-06-16 | Fairchild Engine & Airplane | Passivation of stainless steel alloys |
-
1970
- 1970-04-02 NL NL7004678.A patent/NL164328C/nl not_active IP Right Cessation
-
1971
- 1971-03-31 ES ES389762A patent/ES389762A1/es not_active Expired
- 1971-04-01 US US00130483A patent/US3720548A/en not_active Expired - Lifetime
- 1971-04-02 CA CA109,447A patent/CA949436A/en not_active Expired
- 1971-04-02 BE BE765197A patent/BE765197A/xx not_active IP Right Cessation
- 1971-04-02 JP JP46020270A patent/JPS515630B1/ja active Pending
- 1971-04-02 FR FR7111732A patent/FR2085804B1/fr not_active Expired
- 1971-04-02 DE DE19712116201 patent/DE2116201A1/de active Pending
- 1971-04-19 GB GB26820/71A patent/GB1287710A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA949436A (en) | 1974-06-18 |
FR2085804B1 (nl) | 1974-03-08 |
NL7004678A (nl) | 1971-10-05 |
GB1287710A (en) | 1972-09-06 |
NL164328C (nl) | 1980-12-15 |
DE2116201A1 (de) | 1971-11-04 |
BE765197A (fr) | 1971-10-04 |
ES389762A1 (es) | 1973-06-01 |
US3720548A (en) | 1973-03-13 |
FR2085804A1 (nl) | 1971-12-31 |
NL164328B (nl) | 1980-07-15 |