JP7116319B2 - 防食装置 - Google Patents
防食装置 Download PDFInfo
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- JP7116319B2 JP7116319B2 JP2019028361A JP2019028361A JP7116319B2 JP 7116319 B2 JP7116319 B2 JP 7116319B2 JP 2019028361 A JP2019028361 A JP 2019028361A JP 2019028361 A JP2019028361 A JP 2019028361A JP 7116319 B2 JP7116319 B2 JP 7116319B2
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- corrosion
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- 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
- C23F13/22—Monitoring arrangements therefor
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- 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
-
- 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
- C23F13/12—Electrodes characterised by the material
-
- 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
- C23F2201/00—Type of materials to be protected by cathodic protection
- C23F2201/02—Concrete, e.g. reinforced
-
- 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
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Building Environments (AREA)
Description
本発明は、自然に存在する温度勾配を用いて熱電発電し、これを電気防食の電源とすることで鉄筋を防食する技術に関する。熱電発電は可動部や消耗部品もなくメンテナンス不要な発電方法である。本発明により、鉄筋コンクリート構造物中鉄筋の電気防食を、外部エネルギー供給不要、メンテナンス不要で安価に実現できる。
本実施の形態は、対象物が温度勾配を有する場合に、その温度勾配を利用し熱電発電することで電気防食を実現する。鉄筋コンクリート構造物中の鉄筋を防食対象とした場合、例えばコンクリート柱は中空の構造となっているため、コンクリート柱外壁面は日射による温度上昇が顕著な一方、中空内は気温以下の温度となる。コンクリートの厚さが40mmの場合のコンクリート柱の外壁面、中空内壁面、中空内部の温度を測定した結果、日中、外壁面から中空内壁面の温度差は10℃程度、中空内壁面から中空内部の温度差も10℃程度となっていた。したがって、利用できる温度勾配は、コンクリート外壁面から内壁面にかけての10℃程度の温度勾配、内壁面から中空内部にかけての10℃程度の温度勾配、および、両勾配を合わせたコンクリート外壁面から中空内部への20℃程度の温度勾配となる。
上記のように、いくつかの実施の形態を記載したが、開示の一部をなす論述および図面は例示的なものであり、各実施の形態を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例および運用技術が明らかとなろう。
11…P材料
12…N材料
13…接合部
20…アノード部
30…カソード部
51…コンクリート外壁面
52…コンクリート内壁面
53…非金属
54…中空内部側
55…支持柱(基準点)
56…中空内部
Claims (6)
- 構造物中の金属材料を防食する防食装置であって、
温度勾配により起電力を生ずる熱電発電部と、
前記起電力に対応するアノード反応を担うアノード部と、
前記起電力に対応するカソード反応を担うカソード部と、を有し、
前記カソード部は、前記構造物中の金属材料であ り、
前記構造物は、鉄筋とコンクリートとで構成され、ひび割れが生じた鉄筋コンクリート構造物であり、
前記ひび割れが生じたひび割れ位置の中空部内壁に前記熱電発電部を貼付し、前記熱電発電部と前記カソード部である前記鉄筋と前記アノード部とを電気的に接続することで、前記鉄筋コンクリート構造物の鉄筋を防食する ことを特徴とする防食装置。 - 前記アノード部に、液体に溶けない不溶性材料、炭素、貴金属のうちいずれかを用いることを特徴とする請求項1に記載の防食装置。
- 前記構造物に前記熱電発電部を直接設置することで、前記構造物との接触面から前記熱電発電部への熱拡散と前記熱電発電部の前記構造物との非接触面からの放熱による恒常的温度勾配を利用することを特徴とする請求項1または2に記載の防食装置。
- 前記金属材料が非金属に包埋された構造物の内部に、前記熱電発電部、前記アノード部、前記カソード部を組み込むことで、前記構造物に耐食性を付与することを特徴とする請求項1から3のいずれか1項に記載の防食装置。
- 前記構造物において、温度勾配における高温部に、屋外環境における前記構造物の日射面の温度上昇を用い、温度勾配における低温部に、屋外環境における前記構造物の非日射面の恒常的な低温部を用いることを特徴とする請求項1から4のいずれか1項に記載の防食装置。
- 前記アノード部は、地中に埋設されアースされていることを特徴とする請求項1から5のいずれか1項に記載の防食装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019028361A JP7116319B2 (ja) | 2019-02-20 | 2019-02-20 | 防食装置 |
PCT/JP2020/004450 WO2020170830A1 (ja) | 2019-02-20 | 2020-02-06 | 防食装置 |
US17/431,332 US20220145475A1 (en) | 2019-02-20 | 2020-02-06 | Corrosion Prevention Device |
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JP2019028361A JP7116319B2 (ja) | 2019-02-20 | 2019-02-20 | 防食装置 |
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JP2020132949A JP2020132949A (ja) | 2020-08-31 |
JP7116319B2 true JP7116319B2 (ja) | 2022-08-10 |
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US (1) | US20220145475A1 (ja) |
JP (1) | JP7116319B2 (ja) |
WO (1) | WO2020170830A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7308481B2 (ja) * | 2019-06-03 | 2023-07-14 | 国立大学法人 東京大学 | コンクリート構造物における鋼材の電気防食装置および電気防食方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002206182A (ja) | 2000-12-28 | 2002-07-26 | Sumitomo Osaka Cement Co Ltd | コンクリート構造物の電気防食装置 |
JP2015090041A (ja) | 2013-11-07 | 2015-05-11 | 日本電信電話株式会社 | 腐食防止システム |
JP2015525832A (ja) | 2012-07-19 | 2015-09-07 | ベクター コロージョン テクノロジーズ エルティーディー. | 犠牲陽極を使用する腐食防止 |
JP2017036475A (ja) | 2015-08-10 | 2017-02-16 | 富士通株式会社 | マンホール蓋防食システム |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60143775U (ja) * | 1984-03-06 | 1985-09-24 | 株式会社クボタ | 鉄骨系家屋 |
US4830925A (en) * | 1988-01-04 | 1989-05-16 | Dow Corning Corporation | Cathodic protection method and compositions |
JPH0514160U (ja) * | 1991-08-01 | 1993-02-23 | 振興自動車株式会社 | ソーラーシステム電子防錆装置 |
JPH09111478A (ja) * | 1995-10-12 | 1997-04-28 | Hitachi Ltd | 鉄鋼材料の電気防食法 |
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2019
- 2019-02-20 JP JP2019028361A patent/JP7116319B2/ja active Active
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2020
- 2020-02-06 WO PCT/JP2020/004450 patent/WO2020170830A1/ja active Application Filing
- 2020-02-06 US US17/431,332 patent/US20220145475A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002206182A (ja) | 2000-12-28 | 2002-07-26 | Sumitomo Osaka Cement Co Ltd | コンクリート構造物の電気防食装置 |
JP2015525832A (ja) | 2012-07-19 | 2015-09-07 | ベクター コロージョン テクノロジーズ エルティーディー. | 犠牲陽極を使用する腐食防止 |
JP2015090041A (ja) | 2013-11-07 | 2015-05-11 | 日本電信電話株式会社 | 腐食防止システム |
JP2017036475A (ja) | 2015-08-10 | 2017-02-16 | 富士通株式会社 | マンホール蓋防食システム |
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JP2020132949A (ja) | 2020-08-31 |
WO2020170830A1 (ja) | 2020-08-27 |
US20220145475A1 (en) | 2022-05-12 |
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