GB1060158A - Inhibition of the corrosive action of waters of low mineral content - Google Patents

Inhibition of the corrosive action of waters of low mineral content

Info

Publication number
GB1060158A
GB1060158A GB5050763A GB5050763A GB1060158A GB 1060158 A GB1060158 A GB 1060158A GB 5050763 A GB5050763 A GB 5050763A GB 5050763 A GB5050763 A GB 5050763A GB 1060158 A GB1060158 A GB 1060158A
Authority
GB
United Kingdom
Prior art keywords
waters
alkaline earth
alkali metal
pyrophosphate
cations
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
GB5050763A
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.)
T E B SA
Original Assignee
T E B SA
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 T E B SA filed Critical T E B SA
Publication of GB1060158A publication Critical patent/GB1060158A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/62—Heavy metal compounds
    • C02F1/64—Heavy metal compounds of iron or manganese
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/083—Mineral agents
    • 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
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/184—Phosphorous, arsenic, antimony or bismuth containing compounds
    • 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
    • C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
    • C23F11/187—Mixtures of inorganic inhibitors
    • C23F11/188—Mixtures of inorganic inhibitors containing phosphates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

The corrosive action of acid waters, containing at most 60 p.p.m. of alkaline earth metal cations, is inhibited by dissolving in these waters an alkali metal pyrophosphate which is at least dibasic in a proportion such that the pH reaches 7-8. The proportion of pyrosphosphate used may correspond stoichiometrically to only a fraction of the alkaline earth cations in the water, e.g. 10-30 p.p.m. of tetrasodium pyrophosphate added to water containing 20-60 p.p.m. of alkaline earth metal cations and pH 6-6.9. The invention also relates to compositions for use in the above process comprising a mixture of tetrasodium and/or tetrapotassium pyrophosphate and a dibasic alkali metal pyrophosphate, optionally accompanied by an alkali metal ferrocyanide. A soft water obtained by this process may comprise 20-60 p.p.m. of alkaline earth metal cations, less than 200 p.p.m. of strong anions, 10-30 p.p.m. of phosphate expressed as Na4P2O7 and possibly up to 10 p.p.m. of an alkali metal ferrocyanide, the pH being 7-8.
GB5050763A 1962-12-21 1963-12-20 Inhibition of the corrosive action of waters of low mineral content Expired GB1060158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR919457A FR1353512A (en) 1962-12-21 1962-12-21 Inhibition of the corrosive action of water of low hardness

Publications (1)

Publication Number Publication Date
GB1060158A true GB1060158A (en) 1967-03-01

Family

ID=8793400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5050763A Expired GB1060158A (en) 1962-12-21 1963-12-20 Inhibition of the corrosive action of waters of low mineral content

Country Status (3)

Country Link
DE (1) DE1517569A1 (en)
FR (1) FR1353512A (en)
GB (1) GB1060158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1582608A2 (en) * 2004-03-31 2005-10-05 Kurita Water Industries Ltd. Corrosion inhibition method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465010A1 (en) * 1979-09-17 1981-03-20 Solvay PROCESS FOR INHIBITING THE CORROSION OF A METAL PLANT IN CONTACT WITH AN ACIDIC BATH

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1582608A2 (en) * 2004-03-31 2005-10-05 Kurita Water Industries Ltd. Corrosion inhibition method
EP1582608A3 (en) * 2004-03-31 2010-01-20 Kurita Water Industries Ltd. Corrosion inhibition method
US8163105B2 (en) 2004-03-31 2012-04-24 Kurita Water Industries Ltd. Corrosion inhibition method

Also Published As

Publication number Publication date
FR1353512A (en) 1964-02-28
DE1517569A1 (en) 1969-08-21

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