GB1123938A - Process for the passivation of titanium - Google Patents

Process for the passivation of titanium

Info

Publication number
GB1123938A
GB1123938A GB45417/66A GB4541766A GB1123938A GB 1123938 A GB1123938 A GB 1123938A GB 45417/66 A GB45417/66 A GB 45417/66A GB 4541766 A GB4541766 A GB 4541766A GB 1123938 A GB1123938 A GB 1123938A
Authority
GB
United Kingdom
Prior art keywords
titanium
nitrite
sulphuric acid
reactor vessel
acid
Prior art date
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
GB45417/66A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij 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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB1123938A publication Critical patent/GB1123938A/en
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
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/04—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in markedly acid liquids
    • 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
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B7/00—Halogens; Halogen acids
    • C01B7/13—Iodine; Hydrogen iodide
    • C01B7/14—Iodine
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • B01J2219/0209—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components of glass
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/025—Apparatus characterised by their chemically-resistant properties characterised by the construction materials of the reactor vessel proper
    • B01J2219/0277—Metal based

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

Titanium and its alloys in contact with dilute sulphuric acid are passivated by dissolving at least one nitrite in the acid. The nitrites used may be those of the alkaline and alkaline earth metals such as sodium, potassium caesium and calcium nitrite and also iron and copper nitrite. The nitrite concentration is 0.01 - 5% by weight and the titanium and sulphuric acid may be held in a glass lined reactor vessel or the reactor vessel may be made of titanium and the sulphuric acid is used for the recovery of incline by the oxidation of iodides. The passivity of the titanium is determined during the process by measuring the titanium potential by means of a platinum reference electrode.
GB45417/66A 1965-10-13 1966-10-11 Process for the passivation of titanium Expired GB1123938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6513230A NL6513230A (en) 1965-10-13 1965-10-13

Publications (1)

Publication Number Publication Date
GB1123938A true GB1123938A (en) 1968-08-14

Family

ID=19794360

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45417/66A Expired GB1123938A (en) 1965-10-13 1966-10-11 Process for the passivation of titanium

Country Status (3)

Country Link
FR (1) FR1496385A (en)
GB (1) GB1123938A (en)
NL (1) NL6513230A (en)

Also Published As

Publication number Publication date
NL6513230A (en) 1967-04-14
FR1496385A (en) 1967-09-29

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