JP5787614B2 - Method and apparatus for removing oxide scale by electropolishing - Google Patents

Method and apparatus for removing oxide scale by electropolishing Download PDF

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JP5787614B2
JP5787614B2 JP2011111845A JP2011111845A JP5787614B2 JP 5787614 B2 JP5787614 B2 JP 5787614B2 JP 2011111845 A JP2011111845 A JP 2011111845A JP 2011111845 A JP2011111845 A JP 2011111845A JP 5787614 B2 JP5787614 B2 JP 5787614B2
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千秋 田口
千秋 田口
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株式会社日本科学エンジニアリング
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    • 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
    • C25F1/02—Pickling; Descaling
    • C25F1/04—Pickling; Descaling in solution
    • C25F1/06—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating

Description

この発明は、ステンレス鋼の溶接部分に発生する酸化スケールを電解研磨により除去する方法とその装置とに関する。   The present invention relates to a method and apparatus for removing oxide scale generated in a welded portion of stainless steel by electropolishing.

ステンレス鋼に溶接を施すと、その溶接部分に「溶接焼け」と呼ばれる酸化スケールが発生する。この酸化スケールは種々のトラブル要因となるため、除去する必要があり、これを電気化学的に除去する「電解研磨」が広く用いられている。   When stainless steel is welded, an oxide scale called “weld burn” is generated at the welded portion. Since this oxide scale causes various troubles, it must be removed, and “electropolishing” for removing it electrochemically is widely used.

図４は、電解研磨による酸化スケール除去方法の一例を示すもので、ホルダー９の先端より突き出たステンレス製の棒状電極９０に不織布などの布体９１を巻き付けて固定し、布体９１に電解液を含浸させてステンレス鋼９２の溶接部分９３に押し当て通電し、これにより溶接部分９３に発生した酸化スケールを除去する（例えば、特許文献１参照）。電解液として、硫酸、リン酸、フッ酸、硝酸、クエン酸、酒石酸、リンゴ酸、酢酸、コハク酸などの種々の酸や、これらのアンモニウム塩、カリウム塩、ナトリウム塩などの中性塩水溶液が用いられる。   FIG. 4 shows an example of a method for removing oxide scale by electropolishing. A cloth body 91 such as a non-woven fabric is wrapped around and fixed to a stainless steel rod-like electrode 90 protruding from the tip of the holder 9. Is impregnated and pressed against the welded portion 93 of the stainless steel 92 and energized, thereby removing the oxide scale generated in the welded portion 93 (see, for example, Patent Document 1). The electrolyte includes various acids such as sulfuric acid, phosphoric acid, hydrofluoric acid, nitric acid, citric acid, tartaric acid, malic acid, acetic acid, succinic acid, and neutral salt aqueous solutions such as ammonium salts, potassium salts, and sodium salts. Used.

特開２００５−２１３５５０号公報JP 2005-213550 A

しかし、上記した酸化スケール除去方法では、布体９１を棒状電極９０に巻き付けて固定する必要があり、準備に手間がかかり、作業中に布体９１が外れるおそれもある。また、布体９１を溶接部分９３の凹凸面にむらなく接触させるのが容易でなく、溶接部分９３より酸化スケールを完全に除去するのが困難である。   However, in the above-described oxide scale removal method, the cloth body 91 needs to be wound and fixed around the rod-shaped electrode 90, which takes time for preparation and may cause the cloth body 91 to come off during the operation. Further, it is not easy to uniformly contact the cloth body 91 with the uneven surface of the welded portion 93, and it is difficult to completely remove the oxide scale from the welded portion 93.

上記の問題を解決するため、発明者は、検討を重ねた結果、棒状電極９０に代えて柔軟な炭素繊維をブラシ状に束ねて形成した電極を用い、その電極の炭素繊維の束に電解液を直接含ませることを案出した。この方法によれば、布体を巻き付ける必要がなく、溶接部分９３の凹凸面に電極を構成する炭素繊維の束をむらなく接触させることが可能である。しかし、その種の電極を用いた場合、炭素繊維の通電性がきわめて良好であるため、通電によってステンレス鋼と電極との接触部分が発熱して高温となり、電解液によってはそれが原因で有毒ガスを発生させるおそれがあり、これが炭素繊維による電極を用いることの障害となっている。   In order to solve the above problem, the inventor has made extensive studies, and instead of using the rod-shaped electrode 90, an electrode formed by bundling flexible carbon fibers in a brush shape is used. Devised to include directly. According to this method, it is not necessary to wind the cloth body, and the bundle of carbon fibers constituting the electrode can be brought into contact with the uneven surface of the welded portion 93 without unevenness. However, when such an electrode is used, the electrical conductivity of the carbon fiber is extremely good, and the contact portion between the stainless steel and the electrode generates heat and becomes hot due to energization, and depending on the electrolyte, it can be a toxic gas. This is an obstacle to the use of carbon fiber electrodes.

この発明は、上記問題に着目してなされたもので、炭素繊維をブラシ状に束ねた電極部を採用し、かつその種の電極部を用いても有毒ガスを発生させることがない電解研磨による酸化スケール除去方法およびその装置を提供することを目的とする。   The present invention has been made by paying attention to the above problem, and employs an electrode portion in which carbon fibers are bundled in a brush shape, and by electropolishing that does not generate toxic gas even if such an electrode portion is used. An object of the present invention is to provide an oxide scale removing method and an apparatus therefor.

この発明による電解研磨による酸化スケール除去方法は、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を電解液として用いるもので、炭素繊維をブラシ状に束ねて形成された電極部の前記炭素繊維の束に前記電解液を含ませてステンレス鋼の溶接部分に押し当て通電することにより前記溶接部分の酸化スケールを除去することを特徴とする。 The method for removing oxide scale by electropolishing according to the present invention uses a neutral salt aqueous solution combining one or more of sodium salt, potassium salt and ammonium salt of citric acid, tartaric acid, malic acid, lactic acid as an electrolytic solution. In the electrode portion formed by bundling carbon fibers in a brush shape, the electrolyte solution is included in the bundle of carbon fibers and pressed against the welded portion of stainless steel to energize the welded portion, thereby forming an oxide scale on the welded portion. It is characterized by removing.

この発明によると、電極部を構成する炭素繊維の束は溶接部分の凹凸面にむらなく接触させることが可能であるので、酸化スケールを確実に除去できる。また、電極部を構成する炭素繊維は通電性がきわめて良好であることから、通電によってステンレス鋼と電極部との接触部分が発熱して高温になるが、電解液としてクエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いるので、電解液より有毒ガスが生成されることがない。 According to the present invention, the bundle of carbon fibers constituting the electrode part can be uniformly brought into contact with the uneven surface of the welded portion, so that the oxide scale can be reliably removed. In addition, since the carbon fiber constituting the electrode part has extremely good electrical conductivity, the contact part between the stainless steel and the electrode part generates heat and becomes high temperature due to the current. However, citric acid, tartaric acid, malic acid are used as the electrolyte. Since a neutral salt aqueous solution combining one or more of lactic acid sodium salt, potassium salt and ammonium salt is used, no toxic gas is generated from the electrolyte.

この発明の好ましい実施態様においては、前記電解液として、酒石酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いる。 In a preferred embodiment of the present invention, a neutral salt aqueous solution in which one or more of sodium salt, potassium salt and ammonium salt of tartaric acid are combined is used as the electrolytic solution.

電解液として、酒石酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いてステンレス鋼を処理した場合、ステンレス鋼と電極部との接触部分に火花が発生しても、処理部分は耐食性が低下せず、未処理部分より耐食性が高いことを確認した。これに対して、その他の電解液を用いた場合、ステンレス鋼と電極部との接触部分に火花が発生すると、処理部分であっても耐食性が著しく低下することを確認した。なお、耐食性試験は試験片を塩化第二鉄水溶液へ浸漬後、減量比を比べることで判断した。 When stainless steel is treated with an aqueous solution of neutral salt in which one or more of sodium salt, potassium salt, and ammonium salt of tartaric acid is combined as an electrolytic solution, the contact portion between the stainless steel and the electrode portion It was confirmed that even if a spark occurred, the treated portion did not deteriorate in corrosion resistance and was higher in corrosion resistance than the untreated portion. On the other hand, when other electrolyte solutions were used, it was confirmed that when sparks occur at the contact portion between the stainless steel and the electrode portion, the corrosion resistance is significantly reduced even at the treated portion. In addition, the corrosion resistance test was judged by comparing the weight loss ratio after the test piece was immersed in a ferric chloride aqueous solution.

この発明による電解研磨による酸化スケール除去装置は、装置本体と電解液とから成るもので、前記電解液として、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いている。前記装置本体は、電源供給部と、電源供給部の出力端子より引き出される２本のコード線の先端にそれぞれ設けられる電極部とを有し、一方の電極部はステンレス鋼に接続可能であり、他方の電極部は、炭素繊維をブラシ状に束ねて形成されたものであって前記電解液が炭素繊維間の隙間に保持されるようになっている。 An apparatus for removing oxide scale by electropolishing according to the present invention comprises an apparatus main body and an electrolytic solution. As the electrolytic solution, one of citric acid, tartaric acid, malic acid, sodium salt of lactic acid, potassium salt, and ammonium salt is used. A neutral salt aqueous solution in which two or more species are combined is used. The apparatus main body has a power supply part and an electrode part provided at each end of two cord wires drawn from the output terminal of the power supply part, and one electrode part can be connected to stainless steel, The other electrode part is formed by bundling carbon fibers in a brush shape, and the electrolytic solution is held in a gap between the carbon fibers .

上記した構成の酸化スケール除去装置を用いて溶接部分に発生した酸化スケールを除去するには、一方の電極部をステンレス鋼に接続し、他方の電極部を構成する炭素繊維の束に電解液を含ませてステンレス鋼の溶接部分に押し当て、電源供給部より供給される電圧を電極部間に印加して通電する。電極部を構成する炭素繊維の束は柔軟であり、溶接部分の凹凸面にむらなく接触させることが可能であるので、溶接部分の酸化スケールが確実に除去される。また、電極部を構成する炭素繊維は通電性がきわめて良好であることから、通電によってステンレス鋼と電極部との接触部分が発熱して高温になるが、電解液として、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いているので、電解液より有毒ガスが生成されることはない。 In order to remove the oxide scale generated in the welded portion using the oxide scale removing device having the above-described configuration, one electrode portion is connected to stainless steel, and the electrolyte is applied to the bundle of carbon fibers constituting the other electrode portion. It is included and pressed against the welded portion of stainless steel, and a voltage supplied from the power supply unit is applied between the electrode units to conduct electricity. Since the bundle of carbon fibers constituting the electrode portion is flexible and can be brought into uniform contact with the uneven surface of the welded portion, the oxide scale in the welded portion is reliably removed. In addition, since the carbon fiber constituting the electrode part has extremely good electrical conductivity, the contact part between the stainless steel and the electrode part generates heat and becomes high temperature due to current application. However, as the electrolyte, citric acid, tartaric acid, apple Since a neutral salt aqueous solution in which one or more of acid, lactic acid sodium salt, potassium salt and ammonium salt is combined is used, no toxic gas is generated from the electrolyte.

この発明によれば、炭素繊維をブラシ状に束ねて形成された電極部の前記炭素繊維の束に電解液を直接含ませて溶接部分に押し当て通電するから、電極部に布体を巻き付けるなどの作業は不要であり、溶接部分の凹凸面に電極部を構成する炭素繊維の束をむらなく接触させることができ、酸化スケールを確実に除去できる。また、通電によりステンレス鋼と電極部との接触部分が発熱して高温になっても、電解液より有毒ガスが生成されることはない。 According to this invention, since the electrolyte solution is directly included in the bundle of carbon fibers of the electrode portion formed by bundling carbon fibers in a brush shape and pressed against the welded portion to energize, the cloth body is wrapped around the electrode portion, etc. This work is unnecessary, and the bundle of carbon fibers constituting the electrode portion can be brought into contact with the uneven surface of the welded portion evenly, and the oxide scale can be reliably removed. In addition, no toxic gas is generated from the electrolytic solution even when the contact portion between the stainless steel and the electrode portion generates heat and becomes high temperature due to energization.

この発明の酸化スケール除去方法を実施するための装置構成を示す斜視図である。It is a perspective view which shows the apparatus structure for enforcing the oxide scale removal method of this invention. 電極を示す正面図である。It is a front view which shows an electrode. 図２のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. 従来の酸化スケール除去方法を示す斜視図である。It is a perspective view which shows the conventional oxide scale removal method.

図１は、この発明の一実施例である酸化スケール除去装置の構成と、その装置を用いて
ステンレス鋼５の溶接部分５０に発生した酸化スケール（図中、斜線で示す）を除去する方法を示している。
図示例の酸化スケール除去装置は、電解研磨により酸化スケールを除去するもので、装置本体１と電解液１０とで構成されている。装置本体１は、筐体が箱形の電源供給部２と、電源供給部２の前面の出力端子２１，２２より引き出される２本のコード線２３，２４と、各コード線２３，２４の先端にそれぞれ設けられる電極部３，４とを有している。電源供給部２の出力端子２１，２２には、スイッチの切替えによって交流、直流、交直重畳の電圧が出力可能になっている。作業者は出力電圧の形式を選択し、処理対象のステンレス鋼５の状態を目視しながらボリューム２５を回して出力電圧を調節する。出力電圧は例えば１５〜４０ボルトの範囲で調節し、５〜５０アンペアの電流を流す。 FIG. 1 shows a configuration of an oxide scale removing apparatus according to an embodiment of the present invention and a method for removing oxide scale (indicated by hatching in the figure) generated in a welded portion 50 of stainless steel 5 using the apparatus. Show.
The oxide scale removing apparatus in the illustrated example removes the oxide scale by electrolytic polishing, and includes an apparatus main body 1 and an electrolytic solution 10. The apparatus main body 1 includes a box-shaped power supply unit 2, two cord wires 23 and 24 drawn from output terminals 21 and 22 on the front surface of the power supply unit 2, and tips of the respective code wires 23 and 24. Are provided with electrode portions 3 and 4, respectively. The output terminals 21 and 22 of the power supply unit 2 can output AC, DC, and AC / DC superimposed voltages by switching the switches. The operator selects the output voltage format, and adjusts the output voltage by turning the volume 25 while viewing the state of the stainless steel 5 to be processed. The output voltage is adjusted in the range of 15 to 40 volts, for example, and a current of 5 to 50 amperes is passed.

一方の電極部３は、処理対象のステンレス鋼５に電気的、機械的に接続可能な構成のもので、この実施例では、ステンレス鋼５の種々の厚みに対応できかつステンレス鋼５に対する着脱が容易なようにクリップ３０を用いて構成されている。   One electrode portion 3 is configured to be electrically and mechanically connectable to the stainless steel 5 to be processed. In this embodiment, the electrode portion 3 can cope with various thicknesses of the stainless steel 5 and can be attached to and detached from the stainless steel 5. It is configured using a clip 30 for ease.

他方の電極部４は、柔軟な線状をなす極細の炭素繊維をブラシ状に密に束ねて形成されたものであり、電解液が炭素繊維間の隙間に保持されるようになっている。この炭素繊維の束４２の基端部は、図２に示すように、ステンレス製のパイプ４０の先端の開口部４１に挿入されて一体固定されている。なお、炭素繊維として、線膨張係数が小さく、酸、塩基、各種溶媒に侵されにくく、化学的安定性に優れたものであって、引張強度や摩耗特性などに優れたものを用いる。   The other electrode portion 4 is formed by closely bundling ultrafine carbon fibers having a flexible linear shape in a brush shape, and an electrolytic solution is held in a gap between the carbon fibers. As shown in FIG. 2, the base end portion of the carbon fiber bundle 42 is inserted into and fixed to the opening 41 at the tip of the stainless steel pipe 40. Carbon fibers having a low coefficient of linear expansion, being hardly affected by acids, bases, and various solvents, excellent in chemical stability, and excellent in tensile strength and wear characteristics are used.

パイプ４０の後端面にはネジ軸４３が突設され、このネジ軸４３を手持ち操作が可能なホルダー４４の先端部に設けられた電極接続部（図示せず）のネジ孔にネジ込むことにより電極部４がホルダー４４に固定されかつコード線２４と導通する。パイプ４０の外周面には、図２および図３に示すように、合成ゴムなどより成る筒状カバー４５が熱収縮させて被着されている。筒状カバー４５の先端縁はパイプ４０の先端より突出して炭素繊維の束４２の基端部を囲んでおり、これにより炭素繊維の束４２の基端部が撓んでもパイプ４０の先端の開口縁に触れて傷つくことがない。   A screw shaft 43 protrudes from the rear end surface of the pipe 40, and is screwed into a screw hole of an electrode connection portion (not shown) provided at the tip of a holder 44 that can be held by hand. The electrode unit 4 is fixed to the holder 44 and is electrically connected to the cord wire 24. As shown in FIGS. 2 and 3, a cylindrical cover 45 made of synthetic rubber or the like is attached to the outer peripheral surface of the pipe 40 by heat shrinking. The distal end edge of the cylindrical cover 45 protrudes from the distal end of the pipe 40 and surrounds the proximal end portion of the carbon fiber bundle 42, so that even if the proximal end portion of the carbon fiber bundle 42 is bent, the opening of the distal end of the pipe 40 is opened. Touching the edges will not hurt you.

上記したブラシ形態の電極部４は、ネジ軸４３をねじ込んでホルダー４４に取り付けられるので、他の電極部４と交換することが可能である。例えば、炭素繊維の線径、長さ、密度などが異なる複数種の電極部４をあらかじめ用意しておき、使用する電解液に応じて、或いは、処理対象に応じて、いずれかを選択して用いるようにしてもよい。   Since the above-described brush-shaped electrode unit 4 is attached to the holder 44 by screwing the screw shaft 43, the electrode unit 4 can be replaced with another electrode unit 4. For example, a plurality of types of electrode portions 4 having different wire diameters, lengths, densities, and the like of carbon fibers are prepared in advance, and either one is selected according to an electrolytic solution to be used or a processing target. You may make it use.

前記電解液１０として種々のものを用いることが可能であるが、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液のいずれかを用いる。前記電極部４を構成する炭素繊維は通電性がきわめて良好であるため、通電によってステンレス鋼５と電極部４との接触部分が発熱して高温となるが、上記したいずれかの電解液であれば、発熱に起因して有毒ガスが生成されることはない。ここで、「有毒ガス」とは、リン化水素、硫酸ガス、塩素ガス、フッ化水素ガスなどであり、硫酸、リン酸、もしくはそれらのナトリウム、アンモニウム、カリウムなどの中性塩水溶液やフッ酸や酸性タイプの溶液にフッ化物などの中性塩を添加したものなど、有毒ガスが生成するおそれのある電解液の使用は避ける必要がある。 Various electrolytes can be used as the electrolyte solution 10, but a neutral salt obtained by combining one or more of citric acid, tartaric acid, malic acid, sodium salt, potassium salt, and ammonium salt of lactic acid. Use one of the aqueous solutions. Since the carbon fiber constituting the electrode part 4 has very good electrical conductivity, the contact part between the stainless steel 5 and the electrode part 4 generates heat and becomes high temperature by energization. For example, no toxic gas is generated due to heat generation. Here, “toxic gas” refers to hydrogen phosphide, sulfuric acid gas, chlorine gas, hydrogen fluoride gas, etc., and sulfuric acid, phosphoric acid, or neutral salt aqueous solution such as sodium, ammonium, potassium or hydrofluoric acid. It is necessary to avoid the use of electrolytes that may generate toxic gases, such as those obtained by adding neutral salts such as fluoride to acidic solutions.

また、実験によれば、電解液１０として、酒石酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いてステンレス鋼５を処理した場合、ステンレス鋼と電極部との接触部分に火花が発生しても、処理部分は耐食性が低下せず、未処理部分より耐食性が高いことを確認している。因みに、その他の電解液を用いた場合、ステンレス鋼５と電極部４との接触部分に火花が発生すると、処理部分であっても耐食性が著しく低下することを確認している。 Further, according to experiments, when the stainless steel 5 is treated with an aqueous solution of neutral salt obtained by combining one or more of sodium salt, potassium salt, and ammonium salt of tartaric acid as the electrolytic solution 10, It has been confirmed that even if a spark occurs at the contact portion between the steel and the electrode portion, the corrosion resistance of the treated portion does not decrease and the corrosion resistance is higher than that of the untreated portion. Incidentally, it has been confirmed that when other electrolytes are used, if a spark is generated at the contact portion between the stainless steel 5 and the electrode portion 4, the corrosion resistance is significantly reduced even at the treated portion.

上記した構成の酸化スケール除去装置を用いてステンレス鋼５の溶接部分５０に発生した酸化スケールを除去するには、一方の電極部３をステンレス鋼５に接続し、他方の電極部４を構成する炭素繊維の束４２に電解液を含ませてステンレス鋼５の溶接部分５０に押し当て、電源供給部２より供給された電圧を電極部３，４間に印加して通電する。電極部４の炭素繊維の束４２は柔軟であり、溶接部分５０の凹凸面にむらなく接触させることが可能であり、溶接部分５０の酸化スケールが確実に除去される。   In order to remove the oxide scale generated in the welded portion 50 of the stainless steel 5 using the oxide scale removing device having the above-described configuration, one electrode portion 3 is connected to the stainless steel 5 and the other electrode portion 4 is configured. An electrolytic solution is included in the carbon fiber bundle 42 and pressed against the welded portion 50 of the stainless steel 5, and a voltage supplied from the power supply unit 2 is applied between the electrode units 3 and 4 to conduct electricity. The carbon fiber bundle 42 of the electrode part 4 is flexible and can be brought into contact with the uneven surface of the welded part 50 evenly, and the oxide scale of the welded part 50 is reliably removed.

また、電極部４を構成する炭素繊維は通電性がきわめて良好であるため、通電によってステンレス鋼５と電極部４との接触部分が発熱して高温となるが、電解液としてクエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いることで、電解液１０より有毒ガスが生成されることはない。 In addition, since the carbon fiber constituting the electrode part 4 has extremely good electrical conductivity, the contact part between the stainless steel 5 and the electrode part 4 is heated by heating and becomes high temperature. However, citric acid, tartaric acid, By using a neutral salt aqueous solution in which one or more of malic acid, lactic acid sodium salt, potassium salt, and ammonium salt are combined, a toxic gas is not generated from the electrolyte solution 10.

１ 装置本体
２ 電源供給部
３，４ 電極部
５ ステンレス鋼
２１，２２ 出力端子
２３，２４ コード線
４２ 炭素繊維の束
５０ 溶接部分 DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Power supply part 3,4 Electrode part 5 Stainless steel 21,22 Output terminal 23,24 Cord wire 42 Carbon fiber bundle 50 Welded part

Claims (2)

ステンレス鋼の溶接部分に発生する酸化スケールを電解研磨により除去する方法であって、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を電解液として用い、炭素繊維をブラシ状に束ねて形成された電極部の前記炭素繊維の束に前記電解液を含ませてステンレス鋼の溶接部分に押し当て通電することにより前記溶接部分の酸化スケールを除去することを特徴とする電解研磨による酸化スケール除去方法。 A method for removing oxide scale generated in a welded portion of stainless steel by electropolishing, and combining one or more of citric acid, tartaric acid, malic acid, sodium salt, potassium salt, and ammonium salt of lactic acid By using a neutral salt aqueous solution as an electrolyte, and energizing the carbon fiber bundle of the electrode part formed by bundling carbon fibers in a brush shape by pressing the electrolyte solution against the welded portion of stainless steel. A method for removing oxide scale by electropolishing, comprising removing oxide scale from the welded portion. ステンレス鋼の溶接部分に発生する酸化スケールを電解研磨により除去するための装置であって、装置本体と電解液とから成り、前記電解液として、クエン酸、酒石酸、リンゴ酸、乳酸のナトリウム塩、カリウム塩、アンモニウム塩のうちの１種または２種以上を組み合わせた中性塩水溶液を用いており、前記装置本体は、電源供給部と、電源供給部の出力端子より引き出される２本のコード線の先端にそれぞれ設けられる電極部とを有し、一方の電極部はステンレス鋼に接続可能であり、他方の電極部は、炭素繊維をブラシ状に束ねて形成されたものであって前記電解液が炭素繊維間の隙間に保持されるようになっている電解研磨による酸化スケール除去装置。 An apparatus for removing oxidized scale generated in a welded portion of stainless steel by electrolytic polishing, comprising an apparatus main body and an electrolytic solution, and as the electrolytic solution, citric acid, tartaric acid, malic acid, sodium salt of lactic acid, A neutral salt aqueous solution in which one or more of potassium salt and ammonium salt are combined is used, and the apparatus body has a power supply unit and two cords drawn from an output terminal of the power supply unit Each electrode portion is provided at the tip of each of the electrodes, one electrode portion is connectable to stainless steel, and the other electrode portion is formed by bundling carbon fibers in a brush shape, and the electrolyte solution Is an oxide scale removal device by electropolishing that is held in the gaps between carbon fibers .
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AU2017204328B2 (en) * 2016-05-09 2023-03-02 Metal Science Technologies Pty Ltd Tip Brush - New Electrochemical Electrode
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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03236500A (en) * 1990-02-14 1991-10-22 Nobuo Miyazawa Electrolyte for electrolytically treating steel
JP2004217944A (en) * 2003-01-09 2004-08-05 Chiaki Taguchi Method of removing oxide scale by electropolishing
JP3127642U (en) * 2006-09-28 2006-12-07 松下メタル株式会社 Weld burn remover

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* Cited by examiner, † Cited by third party
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