EP2298963B1 - Chauffe-eau électrique à accumulation à double protection cathodique - Google Patents

Chauffe-eau électrique à accumulation à double protection cathodique Download PDF

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Publication number
EP2298963B1
EP2298963B1 EP10175913.2A EP10175913A EP2298963B1 EP 2298963 B1 EP2298963 B1 EP 2298963B1 EP 10175913 A EP10175913 A EP 10175913A EP 2298963 B1 EP2298963 B1 EP 2298963B1
Authority
EP
European Patent Office
Prior art keywords
anode
water heater
sacrificial anode
sacrificial
imposed current
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.)
Active
Application number
EP10175913.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2298963A3 (fr
EP2298963A2 (fr
Inventor
Bertrand Retiere
Cédric Geoffroy
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.)
Compagnie Industrielle des Chauffe Eau SA CICE
Original Assignee
Compagnie Industrielle des Chauffe Eau SA CICE
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 Compagnie Industrielle des Chauffe Eau SA CICE filed Critical Compagnie Industrielle des Chauffe Eau SA CICE
Priority to PL10175913T priority Critical patent/PL2298963T3/pl
Publication of EP2298963A2 publication Critical patent/EP2298963A2/fr
Publication of EP2298963A3 publication Critical patent/EP2298963A3/fr
Application granted granted Critical
Publication of EP2298963B1 publication Critical patent/EP2298963B1/fr
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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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • 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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/10—Electrodes characterised by the structure
    • 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
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
    • C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
    • C23F13/18—Means for supporting electrodes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/0092—Devices for preventing or removing corrosion, slime or scale
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/185—Water-storage heaters using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/40—Arrangements for preventing corrosion
    • F24H9/45—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means
    • F24H9/455—Arrangements for preventing corrosion for preventing galvanic corrosion, e.g. cathodic or electrolytic means for water heaters
    • 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
    • C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
    • C23F2213/20—Constructional parts or assemblies of the anodic or cathodic protection apparatus
    • C23F2213/21—Constructional parts or assemblies of the anodic or cathodic protection apparatus combining at least two types of anodic or cathodic protection

Definitions

  • the invention relates to an electric storage water heater with double cathodic protection.
  • cathodic protection Two types of cathodic protection are known for ensuring the protection of an electric storage water heater against corrosion: either cathodic protection using a sacrificial anode such as a magnesium anode, or cathodic protection using a permanent impressed current anode.
  • the magnesium anode needs to be replaced periodically when it reaches the end of consumption, while the impressed current anode needs to be constantly supplied by an electrical power source to ensure cathodic protection.
  • the document WO 2007/010 335 describes an electric storage water heater with adjustable cathodic protection.
  • This electric storage water heater is protected against corrosion under normal operating conditions and power supply by a permanent impressed current electrode, while the water heater is protected in the absence of supply by a sacrificial anode .
  • the sacrificial anode is electrically connected to the tank of the water heater by a switch intended to interrupt the electrical connection when the power supply supplies said permanent electrode with impressed current.
  • This device is generally satisfactory, but in fact requires disconnecting the sacrificial anode in the event of an electrical supply, to avoid excessive consumption.
  • a first object of the invention is to improve the known state of the art, by proposing a new electric storage water heater with double cathodic protection, which does not require disconnecting the sacrificial anode in the event of any electrical supply. avoiding excessive consumption.
  • a second object of the invention is to provide cathodic protection of an electric storage water heater, even by using a supply system during off-peak hours involving an absence of supply for long periods of the order of 16 hours.
  • the subject of the invention is a double cathodic protection storage water heater according to claim 1, comprising a sacrificial anode and an impressed current anode, characterized in that the sacrificial anode surrounds the impressed current anode and has a conformation capable of avoiding any contact of the impressed current anode with the water from the tank of the electric water heater, before consumption of the sacrificial anode, the impressed current anode being in electrical contact with the sacrificial anode .
  • an electric storage water heater generally designated by (1) comprises a tank of a holding sheath (3), a voltage generator (4), a sacrificial anode (5), an impressed current anode (6) .
  • the cathodic polarization electric circuit comprises the sacrificial anode (5) in electrical contact with the impressed current anode (6) made for example of titanium.
  • the mounting of the sacrificial magnesium anode (5) and of the titanium impressed current anode (6) on the holding sheath (3) is carried out by one of the insulating holding means (8) which are described in detail. with reference to the figure 2 .
  • An insulated supply conductor (9) and an insulated conductor (10) connecting to the tank (2) of the water heater (1) are provided for connecting the generator (4) of protective current to the electric water heater. accumulation (1).
  • the sacrificial anode (5) made of magnesium has a recess for mounting the anode (6) with impressed current in titanium, so as to almost entirely drown the anode (6) in titanium inside the anode ( 5) magnesium.
  • the titanium anode (6) is mounted on the support (3) using an insulating and flexible sleeve, for example made of elastomer, on the outer periphery of the retaining sheath (3).
  • the space inside the elastomer sleeve (8) is connected to the atmosphere inside the insulating support (3), without any contact with the water filling the tank of the water heater.
  • the magnesium sacrificial anode (5) is mounted on the insulating support or retaining sheath (3) by means of an elastomer insulating sleeve disposed on the periphery of the insulating support (3).
  • the space between the elastomeric sleeves is isolated from the water in the tank of the water heater, because the radially outer sleeve completely surrounds the upper end of the retaining sheath (3) carrying the elastomeric sleeve (8).
  • the externally insulated electrical conductor (9) is connected to the titanium impressed current anode (6) so that the titanium impressed current anode (6) can be constantly supplied during periods of power supply to the titanium. electric storage water heater.
  • the titanium impressed current anode (6) is not in contact with the water in the water heater, and the current flowing through this titanium impressed current anode can only be evacuated through the magnesium sacrificial anode (5). Because the general diameter and dimensions of the sacrificial anode (5) of magnesium are much larger than the diameter and dimensions of the impressed current anode (6) of titanium, the current densities passing through the anode in magnesium are much lower than those crossing the titanium anode.
  • the contribution of the cathodic bias current makes it possible to slightly increase the electrochemical protective current which is established naturally between the sacrificial magnesium anode (5) and the tank (2) of the electric storage water heater, in thereby enhancing the effect.
  • the electric storage water heater is constantly protected, even in the case of a power supply interrupted over time, using only the off-peak supply.
  • the operation of the electric water heater according to the invention is thus practically identical to the operation of an electric water heater of the prior art protected only by a sacrificial anode of magnesium.
  • the magnesium sacrificial anode has been practically consumed.
  • the space between the sleeves is then filled at least partially with the water inside the tank of the water heater, and the impressed current anode (6) made of titanium is at least partially in contact with water from the water heater.
  • the operation of the electric water heater according to the invention is identical to the operation of a prior art electric storage water heater equipped with an impressed current anode made of titanium.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
EP10175913.2A 2009-09-16 2010-09-09 Chauffe-eau électrique à accumulation à double protection cathodique Active EP2298963B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10175913T PL2298963T3 (pl) 2009-09-16 2010-09-09 Elektryczny akumulacyjny podgrzewacz wody z podwójną ochroną katodową

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0956357A FR2950081B1 (fr) 2009-09-16 2009-09-16 Chauffe-eau a accumulation a double protection cathodique

Publications (3)

Publication Number Publication Date
EP2298963A2 EP2298963A2 (fr) 2011-03-23
EP2298963A3 EP2298963A3 (fr) 2017-02-15
EP2298963B1 true EP2298963B1 (fr) 2020-04-22

Family

ID=42211962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10175913.2A Active EP2298963B1 (fr) 2009-09-16 2010-09-09 Chauffe-eau électrique à accumulation à double protection cathodique

Country Status (10)

Country Link
US (1) US8649671B2 (ru)
EP (1) EP2298963B1 (ru)
CN (1) CN102022818B (ru)
EG (1) EG26267A (ru)
ES (1) ES2804353T3 (ru)
FR (1) FR2950081B1 (ru)
PL (1) PL2298963T3 (ru)
PT (1) PT2298963T (ru)
RU (1) RU2451882C1 (ru)
UA (1) UA96093C2 (ru)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102162682A (zh) * 2011-04-29 2011-08-24 重庆欧凯电器有限公司 可调式阴极保护型热水器
AU2015202488B2 (en) * 2015-05-08 2021-08-26 Rheem Australia Pty Limited Improved Anode Support and or Locator Device and Method of Assembly
CN105910275B (zh) * 2016-04-12 2019-11-15 芜湖美的厨卫电器制造有限公司 电热水器
DE102018127305A1 (de) * 2018-10-31 2020-04-30 Magontec Gmbh Elektroheizerelement mit einem elektrisch betriebenen Heizelement und einer Anode für den kathodischen Korrosionsschutz
DE102019000378A1 (de) 2019-01-19 2020-07-23 Stiebel Eltron Gmbh & Co. Kg Warmwassergerät und Verfahren zum Betreiben eines Warmwassergerätes
DE102019000389A1 (de) 2019-01-19 2020-07-23 Stiebel Eltron Gmbh & Co. Kg Warmwassergerät und Verfahren zum Betreiben eines Warmwassergerätes
CN112815531A (zh) * 2019-11-15 2021-05-18 青岛海尔智能技术研发有限公司 用于电热水器的防腐装置及直流电热水器
CN112815530B (zh) * 2019-11-15 2023-05-23 青岛海尔智能技术研发有限公司 用于电热水器内胆的防腐装置及直流电热水器

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US3135677A (en) * 1961-02-02 1964-06-02 Thermo Craft Electric Corp Durable anode protective system
DE2605089C3 (de) * 1976-02-10 1978-08-24 Vereinigte Elektrizitaetswerke Westfalen Ag, 4600 Dortmund Wasserbehälter mit elektrischem Heizelement und kathodischem Korrosionsschutz
SU1439550A2 (ru) * 1987-04-22 1988-11-23 Л.П.Дмитренко Устройство дл позиционного регулировани
SU1763811A1 (ru) * 1990-12-05 1992-09-23 Л.Е.Бродский, В.ВАистов и А.Ю.Рыбаков Электроводонагреватель
EP1174529A1 (en) * 2000-07-19 2002-01-23 MERLONI TERMOSANITARI S.p.A. Device for the protection from corrosion of metal tank
CN2623700Y (zh) * 2002-12-13 2004-07-07 颜民 双保防腐蚀装置
KR100643005B1 (ko) * 2003-07-18 2006-11-10 한국전기연구원 전기 방식용 하이브리드 양극 구조
GB0505353D0 (en) * 2005-03-16 2005-04-20 Chem Technologies Ltd E Treatment process for concrete
DE202004017834U1 (de) * 2004-11-17 2005-02-03 Bbt Thermotechnik Gmbh Korrosionsschutzeinrichtung für einen Warmwasserspeicher
ITAN20050037A1 (it) * 2005-07-20 2007-01-21 Merloni Termosanitari Spa Scaldacqua ad accumulo con protezione catodica regolabile
CA2624461C (en) * 2005-10-04 2015-04-21 Gareth Glass Sacrificial anode and backfill
US8002964B2 (en) * 2005-10-04 2011-08-23 Gareth Kevin Glass Sacrificial anode and backfill
RU57875U1 (ru) * 2006-02-10 2006-10-27 Иван Иванович Сергиенко Электродный водоподогреватель
DE102006025252A1 (de) * 2006-05-29 2007-12-06 Norsk Hydro Magnesiumgesellschaft Mbh Opferanode für den kathodischen Korrosionsschutz

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Title
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Also Published As

Publication number Publication date
CN102022818A (zh) 2011-04-20
ES2804353T3 (es) 2021-02-05
EP2298963A3 (fr) 2017-02-15
RU2451882C1 (ru) 2012-05-27
PL2298963T3 (pl) 2020-11-30
EG26267A (en) 2013-06-05
RU2010137646A (ru) 2012-03-20
UA96093C2 (ru) 2011-09-26
US8649671B2 (en) 2014-02-11
CN102022818B (zh) 2013-06-05
FR2950081B1 (fr) 2011-12-09
PT2298963T (pt) 2020-07-10
FR2950081A1 (fr) 2011-03-18
US20110064392A1 (en) 2011-03-17
EP2298963A2 (fr) 2011-03-23

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