JPS61107151A - Apparatus for releasing corrosive oxidation film - Google Patents
Apparatus for releasing corrosive oxidation filmInfo
- Publication number
- JPS61107151A JPS61107151A JP22802884A JP22802884A JPS61107151A JP S61107151 A JPS61107151 A JP S61107151A JP 22802884 A JP22802884 A JP 22802884A JP 22802884 A JP22802884 A JP 22802884A JP S61107151 A JPS61107151 A JP S61107151A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- oxide film
- anode
- constant current
- cathode
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
この発明は腐食酸化皮膜の剥離装置に係り、特に、沸騰
水型原子炉の一次冷却系構造物の表面に生成された腐食
酸化皮膜、あるいはこの−次冷却系を模擬した試験装置
において試料表面に生成させた腐食酸化皮膜をそれぞれ
剥離させる腐食酸化皮膜の剥離装置に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a device for removing a corroded oxide film, and in particular, a device for removing a corroded oxide film formed on the surface of a primary cooling system structure of a boiling water nuclear reactor, or this invention. -Regarding a corrosive oxide film peeling device for peeling off corrosive oxide films formed on the surface of a sample in a test device simulating a secondary cooling system.
一般に、沸騰水型原子炉の一次冷却系構造物にはステン
レス鋼が使用され、原子炉の運転とともに、このステン
レス鋼表面に鉄、クロムおよびニッケル等を主成分とす
る腐食酸化皮膜が生成される。この腐食酸化皮膜の成長
過程において、冷却材たる水中に溶解されたイオン状の
放射能が取り込まれる。したがって、−次冷却系構造物
に蓄積される放射能は、腐食酸化皮膜の成長とともに増
加するものと考えられる。そこで、腐食酸化皮膜量を測
定し、この腐食酸化皮膜の成長過程を認識することが、
原子炉−次冷却系構造物における放射能の蓄積挙動およ
び放射能蓄積に関する将来予測にとって非常に重要なも
のとなる。Generally, stainless steel is used for the primary cooling system structure of boiling water nuclear reactors, and as the reactor operates, a corrosive oxide film containing iron, chromium, nickel, etc. as the main components is formed on the surface of this stainless steel. . During the growth process of this corrosive oxide film, ionic radioactivity dissolved in water, which is a coolant, is taken in. Therefore, it is thought that the radioactivity accumulated in the secondary cooling system structure increases as the corrosive oxide film grows. Therefore, it is important to measure the amount of corrosive oxide film and recognize the growth process of this corrosive oxide film.
This will be very important for the future prediction of radioactivity accumulation behavior and radioactivity accumulation in reactor sub-cooling system structures.
従来、この腐食酸化皮膜の定量は、まず実際の原子炉−
次冷却系配管を数α角に切断して試料片とすることから
始める。次に、この試料片を０、１ｗｔ％程度のシュウ
酸等の弱酸に浸漬させて、試料片に生成された腐食酸化
皮膜を溶解させ、溶解液を原子吸光光度計等で分析する
。その後、再び試料片を溶解液に浸漬させ、溶解液を同
様に分析する。試料片に金属光沢が出るまで上記操作を
繰返す。このようにして、腐食酸化皮膜量の測定が行な
われているが、この測定工程は非常に複雑であり、多大
な時間を要する。そのため、この測定においては作業具
に熟練が要求されることになる。Conventionally, the quantity of this corroded oxide film was first measured in an actual nuclear reactor.
Next, start by cutting the cooling system piping into several α angles to obtain a sample piece. Next, this sample piece is immersed in a weak acid such as oxalic acid of about 0.1 wt% to dissolve the corrosive oxide film formed on the sample piece, and the dissolved solution is analyzed using an atomic absorption spectrophotometer or the like. Thereafter, the sample piece is immersed in the solution again, and the solution is analyzed in the same manner. Repeat the above operation until the sample piece has a metallic luster. In this way, the amount of corroded oxide film is measured, but this measurement process is very complicated and takes a lot of time. Therefore, this measurement requires skill with the working tools.
この発明は上記事実を考慮してなされたものであり、金
属表面に生成した腐食酸化皮膜を簡単かつ迅速に剥離さ
せることができる腐食酸化皮膜の剥離装置を提供するこ
とを目的とする。The present invention has been made in consideration of the above facts, and an object of the present invention is to provide a corrosive oxide film stripping device that can easily and quickly peel off a corrosive oxide film formed on a metal surface.
上記目的を達成するために、この発明に係る腐食酸化皮
膜の剥離装置は、定電流を発生可能とし、腐食酸化皮膜
が生成された金属を陽極とする定電流発生装置と、この
定電流発生装置に取付けられ、上記金属を覆うように設
けられた陰極と、上記陽極および陰極を浸漬可能とする
電解液とを有したものであり、陽極および陰極に通電さ
せることにより陽極としての金属試料片の地金を溶かし
、この金属試料片の表面に生成された腐食酸化皮膜を剥
離させるものである。In order to achieve the above object, a corrosive oxide film peeling device according to the present invention includes a constant current generator capable of generating a constant current and using a metal on which a corrosive oxide film is formed as an anode, and this constant current generator. It has a cathode installed to cover the metal, and an electrolytic solution in which the anode and cathode can be immersed.By applying electricity to the anode and cathode, the metal sample piece used as the anode is heated. This method melts the base metal and peels off the corrosive oxide film that has formed on the surface of the metal specimen.
図はこの発明に係る腐食酸化皮膜の剥離装置の一実施例
を示す概略側面図である。The figure is a schematic side view showing an embodiment of a corrosive oxide film peeling apparatus according to the present invention.
電解槽１には、表面に腐食酸化度Ｗｉ３が生成された金
属試料片５が収容される。この金属試料片５は、実際の
沸騰水型原子炉における一次冷却系配管の一部を数α角
に切断した試料片であるか、またはこの原子炉−次冷却
系を模擬した試験装置において、表面に腐食酸化皮膜を
生成させた試料片である。The electrolytic bath 1 accommodates a metal sample piece 5 whose surface has a corrosion oxidation degree Wi3. This metal sample piece 5 is a sample piece obtained by cutting a part of the primary cooling system piping in an actual boiling water reactor into several α angles, or in a test device simulating this reactor-primary cooling system. This is a sample piece with a corrosive oxide film formed on its surface.
また、金属試料片５はリード１１７を介して、定電流を
発生可能とする定電流発生装置９の陽極端子に接続され
る。したがって、この金属試料片５は陽極として機能す
る。一方、定電流発生装置の陰極端子にはリード線１１
を介し、陰極としての陰極ネット１３が接続される。こ
の金属ネット１３は例えば白金ネットであり、金属試料
片５を内部に収容する大きさに形成される。さらに、金
属ネット１３はフレキシブルに構成され、陽極としての
金属試料片５の形状に対応して自在に曲げ可能に設けら
れる。Further, the metal sample piece 5 is connected via a lead 117 to an anode terminal of a constant current generator 9 capable of generating a constant current. Therefore, this metal sample piece 5 functions as an anode. On the other hand, the lead wire 11 is connected to the cathode terminal of the constant current generator.
A cathode net 13 serving as a cathode is connected via. This metal net 13 is, for example, a platinum net, and is formed in a size that accommodates the metal sample piece 5 therein. Further, the metal net 13 is configured to be flexible and can be freely bent in accordance with the shape of the metal sample piece 5 serving as an anode.
また、電解槽１内には電解液１５が満たされ、この電解
液１５により金属試料片５および金属ネット１３が浸漬
可能とされる。この電解液１５は、腐１１酸化皮膜３を
溶解させない程度の薄い強酸あるいは弱酸が用いられる
。Further, the electrolytic bath 1 is filled with an electrolytic solution 15, and the metal sample piece 5 and the metal net 13 can be immersed in this electrolytic solution 15. As the electrolytic solution 15, a strong acid or a weak acid that is thin enough not to dissolve the oxidized film 3 is used.
次に作用を説明する。Next, the effect will be explained.
まず、電解槽１に電解液１５を満たす。次に、金属試料
片５を金属ネット１３内に配置させ、これら金属試料片
５、金属ネット１３を定電流発生装置９の陽極端子、陰
極端子にそれぞれ接続させる。その後、金属試料片５お
よび金属ネット１３を電解液１５中に浸漬させ、これら
金属試料片５および金属ネット１３に通電する。通電後
約１分間程すると金属試料片５が溶解し、この金属試料
片５の表面に生成された腐食酸化皮膜３が剥離する。First, the electrolytic cell 1 is filled with an electrolytic solution 15. Next, the metal sample piece 5 is placed in the metal net 13, and the metal sample piece 5 and the metal net 13 are connected to the anode terminal and the cathode terminal of the constant current generator 9, respectively. Thereafter, the metal sample piece 5 and the metal net 13 are immersed in the electrolytic solution 15, and electricity is applied to the metal sample piece 5 and the metal net 13. Approximately 1 minute after electricity is applied, the metal sample piece 5 is dissolved, and the corrosive oxide film 3 formed on the surface of the metal sample piece 5 is peeled off.
このように、腐食酸化度ｌＩ３の剥離を短時間かつ簡単
に行なうことができる。したがって、この剥離した腐食
酸化皮膜を捕獲し、その重量を測定することにより、金
属試料片５の表面に生成された腐食酸化皮膜量を測定す
ることができる。In this way, peeling with a corrosion oxidation degree of lI3 can be easily performed in a short time. Therefore, by capturing this peeled off corrosive oxide film and measuring its weight, the amount of the corrosive oxide film generated on the surface of the metal sample piece 5 can be measured.
そこで、原子炉−次冷却系の冷却材たる水または試験装
置の試験水への接液時間が異なり、その結果、腐食酸化
皮膜量が異なる多数の試料片について各試料片毎にその
皮ｇｌｆｆｉを測定すれば、腐食酸化皮膜回と接液時間
との関係、すなわち腐食酸化皮膜の生成速度が判明する
。それ故、この腐食酸化皮膜の生成速度からその皮膜に
取り込まれる放射能の蓄積過程が認識でき、原子炉−次
冷却系構造物における放射能の蓄積挙動およびその予測
が可能となる。Therefore, the skin glffi was calculated for each sample piece for a large number of sample pieces with different amounts of corroded oxide film due to different exposure times to the coolant water in the reactor sub-cooling system or the test water in the test equipment. If measured, the relationship between the times of corrosion oxide film and the time of contact with the liquid, that is, the rate of formation of the corrosion oxide film, can be determined. Therefore, from the rate of formation of this corrosive oxide film, it is possible to recognize the accumulation process of radioactivity taken into the film, and it becomes possible to predict the accumulation behavior of radioactivity in the reactor-subcooling system structure.
また、この実施例では、金属ネット１３がフレキシブル
に構成され、金属試料片５の形状に対応して曲げられる
ことから、金属試料片５にかかる電場が均一となり、金
属試料片５から腐食酸化皮膜をむらなく剥離させること
ができる。In addition, in this embodiment, the metal net 13 is configured to be flexible and can be bent in accordance with the shape of the metal sample piece 5, so that the electric field applied to the metal sample piece 5 becomes uniform, and the corrosion oxide film is removed from the metal sample piece 5. can be peeled off evenly.
なお、この実施例では金属ネット１３が白金製の場合に
つき述べたが、金属試験片の組成元素を含まず導電性の
ある金または銀またはカーボンファイバーであってもよ
い。In this embodiment, the metal net 13 is made of platinum, but it may be made of gold, silver, or carbon fiber, which does not contain the constituent elements of the metal test piece and is conductive.
また、この実施例では、陽極としての金属試料片５がス
テンレス類であるものにつき述べたが、炭素鋼の場合に
も同様に適用することができる。Further, in this embodiment, the metal sample piece 5 serving as the anode is made of stainless steel, but the present invention can be similarly applied to the case of carbon steel.
さらに、上記実施例では、陽極が金属試料片５である場
合につき説明したが、この陽極を原子炉−次冷却系の機
器等とすることができる。この場合には、原子炉−次冷
却系の機器から腐食酸化皮膜を剥離させて、これらの機
器等の除染を好適に行なうことができる。Further, in the above embodiments, the case where the anode is the metal sample piece 5 has been described, but this anode can be used as equipment for a nuclear reactor-subcooling system or the like. In this case, the corroded oxide film can be peeled off from the equipment of the reactor-subcooling system, and these equipment can be suitably decontaminated.
以上のように、この発明に係る腐食酸化皮膜の剥離装置
によれば、定電流発生装置の陽極が腐食酸化皮膜の生成
された金属であり、陰極がこの金属を覆うように設けら
れ、さらにこれらの陽極および陰極が電解液に浸漬可能
とされることがら、溶解液に浸漬された陽極および陰極
に通電することにより、陽極の全屈表面に生成された腐
食酸化皮膜を簡単かつ迅速に剥離させることができると
いう効果を奏する。As described above, according to the corrosive oxide film peeling device of the present invention, the anode of the constant current generator is a metal on which a corroded oxide film is formed, the cathode is provided to cover this metal, and Since the anode and cathode of the anode can be immersed in the electrolytic solution, the corrosive oxide film formed on the fully curved surface of the anode can be easily and quickly removed by energizing the anode and cathode immersed in the solution. It has the effect of being able to
図はこの発明に係る腐食酸化皮膜の剥離装置の一実施例
を示す概略側面図である。
１・・・腐食酸化皮膜、５・・・金属試料片、９・・・
定電流発生装置、１３・・・金属ネット、１５・・・電
解液。The figure is a schematic side view showing an embodiment of a corrosive oxide film peeling apparatus according to the present invention. 1... Corrosion oxide film, 5... Metal sample piece, 9...
Constant current generator, 13... Metal net, 15... Electrolyte solution.
Claims (1)
金属を陽極とする定電流発生装置と、この定電流発生装
置に取付けられ、上記金属を覆うように設けられた陰極
と、上記陽極および陰極を浸漬可能とする電解液とを有
することを特徴とする腐食酸化皮膜の剥離装置。 ２、電解液は腐食酸化皮膜を溶解させない溶液により構
成された特許請求の範囲第１項記載の腐食酸化皮膜の剥
離装置。 ３、陽極が腐食酸化皮膜の生成された金属試料片である
特許請求の範囲第１項または第２項記載の腐食酸化皮膜
の剥離装置。 ４、陰極は、その形状が陽極形状に対応して曲げ得るよ
うフレキシブルに構成された特許請求の範囲第１項ない
し第３項にいずれか記載の腐食酸化皮膜の剥離装置。[Scope of Claims] 1. A constant current generator capable of generating a constant current and having a metal as an anode on which a corroded oxide film has been formed; 1. An apparatus for stripping a corroded oxide film, comprising a cathode and an electrolytic solution in which the anode and cathode can be immersed. 2. The corrosive oxide film stripping apparatus according to claim 1, wherein the electrolytic solution is a solution that does not dissolve the corrosive oxide film. 3. The apparatus for removing a corrosive oxide film according to claim 1 or 2, wherein the anode is a metal sample piece on which a corrosive oxide film has been formed. 4. The apparatus for stripping a corroded oxide film according to any one of claims 1 to 3, wherein the cathode is configured to be flexible so that its shape can be bent to correspond to the shape of the anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22802884A JPS61107151A (en) | 1984-10-31 | 1984-10-31 | Apparatus for releasing corrosive oxidation film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22802884A JPS61107151A (en) | 1984-10-31 | 1984-10-31 | Apparatus for releasing corrosive oxidation film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61107151A true JPS61107151A (en) | 1986-05-26 |
| JPH0511259B2 JPH0511259B2 (en) | 1993-02-15 |
Family
ID=16870063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22802884A Granted JPS61107151A (en) | 1984-10-31 | 1984-10-31 | Apparatus for releasing corrosive oxidation film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61107151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630874A (en) * | 2015-01-20 | 2015-05-20 | 北方工业大学 | Method for completely separating film from film composite material |
-
1984
- 1984-10-31 JP JP22802884A patent/JPS61107151A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104630874A (en) * | 2015-01-20 | 2015-05-20 | 北方工业大学 | Method for completely separating film from film composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0511259B2 (en) | 1993-02-15 |
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