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WO2003033766A2 - Procede de protection contre la corrosion - Google Patents

Procede de protection contre la corrosion Download PDF

Info

Publication number
WO2003033766A2
WO2003033766A2 PCT/EP2002/011354 EP0211354W WO03033766A2 WO 2003033766 A2 WO2003033766 A2 WO 2003033766A2 EP 0211354 W EP0211354 W EP 0211354W WO 03033766 A2 WO03033766 A2 WO 03033766A2
Authority
WO
WIPO (PCT)
Prior art keywords
composition
hydrogen peroxide
hypohalite
weight
process according
Prior art date
Application number
PCT/EP2002/011354
Other languages
English (en)
Other versions
WO2003033766A3 (fr
Inventor
Michael John Bowyer
Stephen Kelly
John Stewart
Original Assignee
Unilever Plc
Unilever Nv
Hindustan Lever Limited
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 Unilever Plc, Unilever Nv, Hindustan Lever Limited filed Critical Unilever Plc
Priority to AU2002340545A priority Critical patent/AU2002340545A1/en
Publication of WO2003033766A2 publication Critical patent/WO2003033766A2/fr
Publication of WO2003033766A3 publication Critical patent/WO2003033766A3/fr

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
    • C23C22/06—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 acidic solutions with pH less than 6
    • C23C22/48—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 acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50—Treatment of iron or alloys based thereon
    • 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

Definitions

  • the present invention relates to a process for improving the corrosion resistance of stainless steel .
  • EP-A-096 151 describes a method for passivating the surface of strippers of urea manufacturing plants, using a first passivating agent consisting of an oxygen-containing gas and a second passivating agent in liquid form, selected from hydrogen peroxide, alkali metal persulphates, alkali metal perborates, peracetic acid and organic peroxides.
  • a first passivating agent consisting of an oxygen-containing gas and a second passivating agent in liquid form, selected from hydrogen peroxide, alkali metal persulphates, alkali metal perborates, peracetic acid and organic peroxides.
  • a method of passivating a stainless steel article having a surface oxide layer to be passivated, using a dry gaseous fluid chemically non-reactive with the stainless steel, flushing the surface and baking the article, is described in US-A-5 188 714 the gas is typically nitrogen or argon.
  • Manganese dioxide e.g. precipitated from a potassium permaganate solution, to coat the walls of a polymerization reactor, is known from EP-A- 327 202.
  • FR-A-625 397 discloses a process of passivating a chrome- nickel steel reactor for urea synthesis, using a small quantity of an oxygenating substance such as a peroxide.
  • the present invention now provides a process for the protection of stainless surface from corrosion by a hypohalite-containing composition, the process comprising: -
  • the present invention protects stainless steel surfaces of pipes, vessels and the like for the pumping, transporting, storage or preparation of hypohalite-containing compositions or of any other stainless steel surface to come into contact with the hypohalite composition.
  • the hypohalite is hypobromite or hypochlorite, especially hypochlorite.
  • the hydrogen peroxide may be provided as a simple aqueous solution or in a (preferably aqueous) composition, optionally containing one or more other ingredients, such as surfactants.
  • a surfactant system in an aqueous medium is one suitable composition.
  • the hydrogen peroxide composition preferably contains from 0.1% to 10%, more preferably from 1% to 5% by weight of hydrogen peroxide .
  • a typical aqueous medium containing a surfactant system comprises from 0.01% to 1%, preferably from 0.1% to 1% by weight of anionic surfactant and from 0.1% to 10%, preferably from 1% to 5% by weight of nonionic surfactant.
  • the hydrogen peroxide containing medium also contains a hydrogen peroxide stabiliser such as a heavy metal sequestrant, e.g. of the phosphonate type.
  • a hydrogen peroxide stabiliser such as a heavy metal sequestrant, e.g. of the phosphonate type.
  • Typical hypohalite-based products against which the stainless steel is to be protected include aqueous hypochlorite bleaches, especially aqueous thickened alkali metal hypochlorite bleaches.
  • hypohalite composition comprises an alkali metal silicate, preferably sodium silicate .
  • the concentration of the alkali metal silicate in the hypohalite composition in which it is applied is preferably from 0.01% to 5%, more preferably from 0.1% to 1% by weight of that composition.
  • the hypohalite composition may contain from 1% to 25%, e.g. from 10% to 20% by weight of an amine oxide surfactant .
  • the surface may be treated with the hydrogen peroxide containing medium by filling of a container, the inside surface of which is to be passivated, or by spraying the surface to be subsequently exposed to the hypochlorite, or by any other means. Preferably it is removed, e.g. by drainage, before the surface is contacted with the hypohalite composition.
  • a 40 litre stainless steel vessel was filled with a hydrogen peroxide containing pre-treatment composition and left for an hour.
  • the peroxide-containing composition was then drained and the vessel was filled with a thickened bleach composition.
  • compositions were as follows :-
  • the vessel was inspected daily for evidence of corrosion. On a weekly basis, the bleach was drained and the available chlorine measured, to check that no decomposition (and associated loss of corrosivity) had occurred. The vessel was then re-filled with product. No further peroxide treatment was undertaken after the initial pre-passivation.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Detergent Compositions (AREA)

Abstract

L'invention concerne un procédé de protection contre la corrosion d'une surface inoxydable, au moyen d'une préparation contenant de l'hypohalite. Ledit procédé consiste à : (a) mettre la surface en contact avec une préparation comprenant du peroxyde d'hydrogène ; et (b) mettre la surface en contact avec une préparation contenant de l'hypohalite.
PCT/EP2002/011354 2001-10-16 2002-10-10 Procede de protection contre la corrosion WO2003033766A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002340545A AU2002340545A1 (en) 2001-10-16 2002-10-10 Corrosion protection process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0124846.7 2001-10-16
GBGB0124846.7A GB0124846D0 (en) 2001-10-16 2001-10-16 Corrosion protection process

Publications (2)

Publication Number Publication Date
WO2003033766A2 true WO2003033766A2 (fr) 2003-04-24
WO2003033766A3 WO2003033766A3 (fr) 2003-10-30

Family

ID=9923962

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/011354 WO2003033766A2 (fr) 2001-10-16 2002-10-10 Procede de protection contre la corrosion

Country Status (4)

Country Link
US (1) US20030113224A1 (fr)
AU (1) AU2002340545A1 (fr)
GB (1) GB0124846D0 (fr)
WO (1) WO2003033766A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014117436A1 (fr) * 2013-01-30 2014-08-07 中国科学院金属研究所 Procédé d'amélioration de la résistance à la corrosion par piqûres d'aciers inoxydables austénitiques par traitement chimique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6040094B2 (ja) * 2013-04-25 2016-12-07 株式会社Ihi ステンレス鋼部品の不動態化処理方法
WO2020250784A1 (fr) * 2019-06-11 2020-12-17 三菱瓦斯化学株式会社 Composition aqueuse, procédé de rugosification de surface d'acier inoxydable utilisant ladite composition aqueuse, acier inoxydable rugueux et procédé de fabrication associé

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE625397A (fr) *
NL164328C (nl) * 1970-04-02 1980-12-15 Stamicarbon 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.
EP0096151B1 (fr) * 1982-06-03 1986-07-23 Montedison S.p.A. Procédé pour inhiber la corrosion des strippers dans les installations pour la production d'urée
JPS59157285A (ja) * 1983-02-25 1984-09-06 Hitachi Ltd マルテンサイト系ステンレス鋼の前処理法
JPH07138776A (ja) * 1993-11-04 1995-05-30 Seiichi Abe 次亜塩素酸ナトリウム水溶液の金属防錆液組成物
CH691479A5 (de) * 1996-12-06 2001-07-31 Siemens Ag Oberflächenbehandlung von Stahl.
JP2000345316A (ja) * 1999-06-01 2000-12-12 Nisshin Steel Co Ltd ステンレス鋼の表面改質方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014117436A1 (fr) * 2013-01-30 2014-08-07 中国科学院金属研究所 Procédé d'amélioration de la résistance à la corrosion par piqûres d'aciers inoxydables austénitiques par traitement chimique

Also Published As

Publication number Publication date
US20030113224A1 (en) 2003-06-19
AU2002340545A1 (en) 2003-04-28
WO2003033766A3 (fr) 2003-10-30
GB0124846D0 (en) 2001-12-05

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