US3850657A - Method of sealing leaks in closed cooling systems - Google Patents

Method of sealing leaks in closed cooling systems Download PDF

Info

Publication number
US3850657A
US3850657A US00293641A US29364172A US3850657A US 3850657 A US3850657 A US 3850657A US 00293641 A US00293641 A US 00293641A US 29364172 A US29364172 A US 29364172A US 3850657 A US3850657 A US 3850657A
Authority
US
United States
Prior art keywords
water
oxide
closed cooling
cooling
molar
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 - Lifetime
Application number
US00293641A
Other languages
English (en)
Inventor
M Bodmer
D Hartinger
A Huber
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Priority to US05/495,511 priority Critical patent/US3947610A/en
Application granted granted Critical
Publication of US3850657A publication Critical patent/US3850657A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F11/00—Arrangements for sealing leaky tubes and conduits
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/12—Materials for stopping leaks, e.g. in radiators, in tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00

Definitions

  • the invention concerns a procedure for sealing leaks in closed cooling systems containing an aqueous liquid as the working medium.
  • Sealants for sealing automboile radiators which sealants consist of a suspensionof organic and inorganic substances. These sealants are added to the cooling water and gradually seal off the leak as the cooling water runs out. These substances have the disadvantage that they are successful only in high concentrations. They cannot therefore be used in cooling systems containing cooling pipes of small cross-sectional area, owing to the risk that the coolin pipes will become blocked.
  • An object of the present invention is to provide a procedure which permits the sealing of leaks in cooling systems having cooling pipes of small and large crosssectional area and while the cooling system is in operaily reducible compound of a metal here embraces V complexing agent and the reducing agent being preferably to 1 molar.
  • Cooling water having the followingproperties issuitable forcarrying outthe invention: i
  • the easily reducible compound is cupric oxide or cuprous oxide.
  • the applicability of the procedure of the invention is restricted to cooling systems containing no large quantities of base metals such as aluminum, zinc, lowalloy steel and the like which would cause cementation of the easily reducible metal compound and onto the base metal, thus making it impossible to hold the easily reducible metal compound in solution.
  • base metals such as aluminum, zinc, lowalloy steel and the like which would cause cementation of the easily reducible metal compound and onto the base metal, thus making it impossible to hold the easily reducible metal compound in solution.
  • this preferred form of the invention offers the advantage that corrosion products such as cupric oxide or.cuprous oxide present in the cooling water can be employed as the easily reducible compound of a metal, thus rendering superfluous the further admixture of an easily reducible compound of a metal.
  • the cooling system consists, for example, of glass ,or plastic material
  • a compound of copper, silver, gold, tin, nickel and/or cadmium must be produced in, or added to, the cooling water, preferably in a cation concentration of 10' to 1 molar, because the water contains no suitable corrosion products originating from the material of the cooling system which can be dissolved in the wateras complexes, and their cations then precipitated by a reducing agent without electrical current.
  • the cooling water is preferably alkalized to a pH value of 9 to 10, the concentration of both the ter, for example, can be replaced by fully demineralized and deaerated water, while the O 'concentration, and, hence, the Cu concentration, can be adjusted by controlled admission of air. It has been found particularly beneficial to adjust the total Cu concentration to approximately 0.2 ppm.
  • morpholine tetrahydro-lA-oxa zine
  • water in an amount of 1 to 2 ppm. this can be done, for example, by means of a dosing pump.
  • suitable substances are other amines as well as ammonia, amines and mixtures of these or other substances which (I) exhibit an alkaline reaction and (2) at the same time hold cupric oxide or cuprous oxide in solution as complexes.
  • the concentration of the complexing agent should then be. between 10 and 1 molar, preferably approximately l0 molar.
  • the reducing agent is added to the cooling water to cause electroless precipitation by chemical reduction of the easily reducible compound in solution. This can also be done with a dosing pump. It is also possible, however, to add the complexing agent and reducing agent simultaneously, by means of a suitable metering device.
  • hydrazine When hydrazine is used, its concentration should be between 10 and 1 molar, preferably 10 molar, which corresponds to approximately 15 30 ppm. Reducing agents other than hydrazine may be used, provided they have no harmful side-effects on the cooling fluid or on the object being cooled. I
  • the leakage losses are relatively small, it may be possible to dispense with further addition of the complexing agent as this, in contrast to the reducing agent, is not consumed. If the water escaping from the leak is returned to the cooling circuit, it is generally sufficient to introduce the complexing agent only once.
  • the reducing agent on the other hand, must be frequently or continuously made up in order to maintain the concentration stated.
  • a special oxidizing agent is not absolutely essential if the cooling water already contains sufficient corrosion products, e.g. Cu O, CuO or oxide of other easily reducible metals, or if these corrosion products are added to the cooling water as a sufficiently fine suspension, or better as a colloidal solution.
  • the important point is that the concentration of soluble reducible cations lies between lO and 10*, and preferably in the region of 10' molar.
  • a method for sealing leaks in a closed cooling system using water as the working medium which comprises, introducing into the water'an easily reducible metal oxide selected'from the group consisting of copper, silver, gold, tin, nickel, cadmium, lead, cobalt, platinum, rhodium, iridium and palladium, wherein the mole ratio of metal cation is from 10 to 1 molar, introducing a reducing agent into said water in a concentration of between 10 and 1 molar, so as to cause electroless precipitation of the metal whereby leaks in the closed cooling system are sealed.
  • the water'an easily reducible metal oxide selected'from the group consisting of copper, silver, gold, tin, nickel, cadmium, lead, cobalt, platinum, rhodium, iridium and palladium, wherein the mole ratio of metal cation is from 10 to 1 molar, introducing a reducing agent into said water in a concentration of between 10 and 1 molar, so as to cause electro

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Chemically Coating (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US00293641A 1971-10-13 1972-09-26 Method of sealing leaks in closed cooling systems Expired - Lifetime US3850657A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US05/495,511 US3947610A (en) 1972-09-26 1974-08-07 Procedure for sealing leaks in closed cooling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1484671A CH567223A5 (enrdf_load_stackoverflow) 1971-10-13 1971-10-13

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/495,511 Continuation-In-Part US3947610A (en) 1972-09-26 1974-08-07 Procedure for sealing leaks in closed cooling systems

Publications (1)

Publication Number Publication Date
US3850657A true US3850657A (en) 1974-11-26

Family

ID=4404288

Family Applications (1)

Application Number Title Priority Date Filing Date
US00293641A Expired - Lifetime US3850657A (en) 1971-10-13 1972-09-26 Method of sealing leaks in closed cooling systems

Country Status (7)

Country Link
US (1) US3850657A (enrdf_load_stackoverflow)
JP (1) JPS4849047A (enrdf_load_stackoverflow)
CH (1) CH567223A5 (enrdf_load_stackoverflow)
DE (1) DE2153692C3 (enrdf_load_stackoverflow)
FR (1) FR2156236B1 (enrdf_load_stackoverflow)
GB (1) GB1377158A (enrdf_load_stackoverflow)
IT (1) IT968802B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947610A (en) * 1972-09-26 1976-03-30 Bbc Brown, Boveri & Company Limited Procedure for sealing leaks in closed cooling systems
US20160090518A1 (en) * 2014-09-30 2016-03-31 Chemagineering Corporation Water-cooled extruder improvements
ES2739051A1 (es) * 2018-07-27 2020-01-28 Almasarani Hassan Rida Alsayadi Desaireación del agua de refrigeración de los motores de combustión interna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3790128C2 (de) * 1986-03-04 1995-07-27 Ishihara Chemical Co Ltd Wässrige Lösung zur stromlosen Beschichtung auf Palladium-Basis

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1746028A (en) * 1928-01-11 1930-02-04 Ralph H Churchill Material and method for sealing leaks in liquid-circulating systems
US3709712A (en) * 1971-01-06 1973-01-09 Packo J Process of sealing leaks

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB479812A (en) * 1936-04-08 1938-02-11 British Thomson Houston Co Ltd Improvements in and relating to methods of rendering vessels vacuum tight
GB785693A (en) * 1952-07-19 1957-11-06 Gen Am Transport Improvements in or relating to process and apparatus for chemical nickel plating
DE1133210B (de) * 1958-09-22 1962-07-12 Harshaw Chem Corp Verfahren zur chemischen Vernickelung
DE1946603A1 (de) * 1969-09-15 1971-04-01 Horst Arendt Verfahren zum Herstellen von porenfreien und verbundfesten Schichten,die unter anderem nach dem Flammen-,Elektro-,Pulver- und Plasma-Spritzverfahren oder anderen Auftragsverfahren hergestellt sind
DE2051279A1 (de) * 1969-10-20 1971-07-15 Pmd Chemicals Ltd Wässrige Losung fur die stromlose Abscheidung von Kupfer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1746028A (en) * 1928-01-11 1930-02-04 Ralph H Churchill Material and method for sealing leaks in liquid-circulating systems
US3709712A (en) * 1971-01-06 1973-01-09 Packo J Process of sealing leaks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3947610A (en) * 1972-09-26 1976-03-30 Bbc Brown, Boveri & Company Limited Procedure for sealing leaks in closed cooling systems
US20160090518A1 (en) * 2014-09-30 2016-03-31 Chemagineering Corporation Water-cooled extruder improvements
ES2739051A1 (es) * 2018-07-27 2020-01-28 Almasarani Hassan Rida Alsayadi Desaireación del agua de refrigeración de los motores de combustión interna

Also Published As

Publication number Publication date
DE2153692C3 (de) 1982-10-07
CH567223A5 (enrdf_load_stackoverflow) 1975-09-30
IT968802B (it) 1974-03-20
DE2153692B2 (de) 1979-07-19
FR2156236A1 (enrdf_load_stackoverflow) 1973-05-25
JPS4849047A (enrdf_load_stackoverflow) 1973-07-11
GB1377158A (en) 1974-12-11
DE2153692A1 (de) 1973-04-19
FR2156236B1 (enrdf_load_stackoverflow) 1976-10-29

Similar Documents

Publication Publication Date Title
US4120655A (en) Method for the inhibition of corrosion of ferrous metals in an aqueous medium
Walker Benzotriazole as a corrosion inhibitor for immersed copper
Hoar The corrosion of tin in nearly neutral solutions
US3756957A (en) Solutions for chemical dissolution treatment of metallic materials
US3654993A (en) Method for inhibiting corrosion in a well
KR890003665B1 (ko) 금속표면 산화물의 제거방법
CA2078898C (en) Combinations of alkanoic hydrocarbyl dicarboxylic and carbocyclic alkanoic acids or salts useful as heat transfer fluid corrosion inhibitors
US3850657A (en) Method of sealing leaks in closed cooling systems
CZ289951B6 (cs) Pracovní tekutina absorpčního chladicího systému s inhibitorem koroze a způsob její výroby
US3808138A (en) Composition for removing oxygen from water and method therefor
US3951710A (en) Method for removing copper contaminant from semiconductor surfaces
Leussing Complex Formation between Manganese (II), Nickel (II), and Zinc (II) Ions and Some Symmetrically Substituted Ethylenediamines: The Use of Er and δH Values in Assessing Inductive and Steric Effects
US3947610A (en) Procedure for sealing leaks in closed cooling systems
CN107640814A (zh) 原位还原降解水中硝酸盐的方法
US4085063A (en) Non-chromate pitting and general corrosion inhibitors for aluminum products and method
US2883288A (en) Silver plating bath
US3215637A (en) Process for the protection of metals against the corrosive action of brines
AR001268A1 (es) Procedimiento para formar un recubrimiento protector adherente solido sobre superficies metalicas.
Haake et al. Requirements for long-life microchannel coolers for direct diode laser systems
JPS637026B2 (enrdf_load_stackoverflow)
Mercer Inhibition of the corrosion of grey cast iron in ethanediol/water solutions by benzoate/benzotriazole mixture: A synergistic effect
US4512963A (en) Palladium compound synthesis procedure
JP3203797B2 (ja) 銅系材質と鉄系材質の防食方法
Lucey Pitting Corrosion of Copper in Supply Waters. The Effect of Water Composition
none Synopses of papers in this issue