ATE517T1 - PROCESS FOR COATING THE INSIDE OF PIPES WITH CALCITE. - Google Patents

PROCESS FOR COATING THE INSIDE OF PIPES WITH CALCITE.

Info

Publication number
ATE517T1
ATE517T1 AT79301572T AT79301572T ATE517T1 AT E517 T1 ATE517 T1 AT E517T1 AT 79301572 T AT79301572 T AT 79301572T AT 79301572 T AT79301572 T AT 79301572T AT E517 T1 ATE517 T1 AT E517T1
Authority
AT
Austria
Prior art keywords
coating
calcite
pipes
water
levels
Prior art date
Application number
AT79301572T
Other languages
German (de)
Inventor
David Hasson
Mordechai Karmon
Original Assignee
Technion Research & Development Foundation Ltd.
Mekoroth Water Co. Ltd.
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 Technion Research & Development Foundation Ltd., Mekoroth Water Co. Ltd. filed Critical Technion Research & Development Foundation Ltd.
Application granted granted Critical
Publication of ATE517T1 publication Critical patent/ATE517T1/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
    • C23C22/60—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 alkaline aqueous solutions with pH greater than 8
    • C23C22/62—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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes

Abstract

A method is described for obtaining a tenacious in situ coating deposition of calcite on the inner surface of water pipes. The calcite coating method according to the present invention has an advantage that it is able to maintain a completely corrosion-free system during the coating, thus assisting the formation of a protective coating of good bonding bonding properties. <??>The method consists in the incorporation of a reagent selected from the group consisting of alkali metal sulfite and hydrazine, in an amount which is at least the stochiometrically required to deoxygenate the aqueous solution utilized for said coating, which is supersaturated with respect to calcium carbonate having a dissolved calcium and carbonate levels of above 100 ppm. The calcite producing ingredients are supplied to the water stream in quantities supplementing concentrations available in the natural water used, giving the required supersaturation levels by addition of suitable salts. <??>The calcite coating can be successfully applied to large diameter mains and pipes by utilizing a large recycle ratio. The coating has in particular an improved adherence on the wall of the pipes, when the water is delivered at a flow velocity of above 1.5 m/sec.
AT79301572T 1978-08-04 1979-08-03 PROCESS FOR COATING THE INSIDE OF PIPES WITH CALCITE. ATE517T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL55280A IL55280A (en) 1978-08-04 1978-08-04 Method for calcite coating the inner surface of pipes
EP79301572A EP0008211B1 (en) 1978-08-04 1979-08-03 A method for calcite coating on the inner surface of pipes

Publications (1)

Publication Number Publication Date
ATE517T1 true ATE517T1 (en) 1982-01-15

Family

ID=11050475

Family Applications (1)

Application Number Title Priority Date Filing Date
AT79301572T ATE517T1 (en) 1978-08-04 1979-08-03 PROCESS FOR COATING THE INSIDE OF PIPES WITH CALCITE.

Country Status (6)

Country Link
US (1) US4264651A (en)
EP (1) EP0008211B1 (en)
AT (1) ATE517T1 (en)
CA (1) CA1127916A (en)
DE (1) DE2961689D1 (en)
IL (1) IL55280A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58113382A (en) * 1981-12-28 1983-07-06 Toyo Eng Corp Corrosion preventing method for combustion furnace
IL73198A (en) * 1984-10-09 1988-01-31 Technion Res & Dev Foundation Method for rapid controlled coating of the inner surfaces of pipes with a tenacious calcite lining
FR2616451B1 (en) * 1987-06-12 1989-10-13 Legrand Luc METHOD AND INSTALLATION FOR PROTECTING WATER PIPES FROM CORROSION
JP2653297B2 (en) * 1991-11-06 1997-09-17 住友金属工業株式会社 Method for improving surface roughness resistance of tungsten-containing metal products and method for preventing surface roughness of rolls
JP5563444B2 (en) 2007-05-04 2014-07-30 エコラボ インコーポレイティド Method using water-soluble magnesium compound as cleaning agent
US9011979B2 (en) * 2009-11-27 2015-04-21 Basf Se Process for producing polymer-containing coatings

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1531993A (en) * 1923-02-23 1925-03-31 Frank N Speller Water-treating compound
FR622925A (en) * 1925-10-21 1927-06-09 Process for obtaining a layer preserving incrustations and applicable to water pipes
US2015290A (en) * 1932-04-13 1935-09-24 Sanders James Mcconnell Container for asphalt
US2299748A (en) * 1939-05-13 1942-10-27 Hall Lab Inc Control of calcium carbonate deposition for corrosion inhibition
FR1241945A (en) * 1959-11-10 1960-09-23 California Research Corp Corrosion protection of oil well casing
US3640759A (en) * 1969-04-29 1972-02-08 Nat Water Main Cleaning Co Method for lining pipes with calcite

Also Published As

Publication number Publication date
IL55280A (en) 1981-07-31
EP0008211B1 (en) 1981-12-30
CA1127916A (en) 1982-07-20
EP0008211A1 (en) 1980-02-20
IL55280A0 (en) 1978-10-31
DE2961689D1 (en) 1982-02-18
US4264651A (en) 1981-04-28

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties