JPS6148596B2 - - Google Patents

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Publication number
JPS6148596B2
JPS6148596B2 JP5091082A JP5091082A JPS6148596B2 JP S6148596 B2 JPS6148596 B2 JP S6148596B2 JP 5091082 A JP5091082 A JP 5091082A JP 5091082 A JP5091082 A JP 5091082A JP S6148596 B2 JPS6148596 B2 JP S6148596B2
Authority
JP
Japan
Prior art keywords
counter electrode
main
diode
auxiliary
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.)
Expired
Application number
JP5091082A
Other languages
Japanese (ja)
Other versions
JPS58171595A (en
Inventor
Koichi Yoshida
Teruo Myashita
Masahiko Kawamura
Yoshio Hirayama
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.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal Co Ltd
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 Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to JP5091082A priority Critical patent/JPS58171595A/en
Publication of JPS58171595A publication Critical patent/JPS58171595A/en
Publication of JPS6148596B2 publication Critical patent/JPS6148596B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】 本発明は電解処理設備の創案に係り、被処理材
を金属イオンを含有した電解処理液中で電気化学
的に処理するための設備における対極に関してア
ノード電流による劣化を有効に防止せしめ、安定
した有効な電解処理操業を円滑に実施し得るよう
にしたものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the creation of electrolytic treatment equipment, which effectively suppresses deterioration caused by an anode current with respect to a counter electrode in equipment for electrochemically treating materials to be treated in an electrolytic treatment solution containing metal ions. This prevents this from occurring and enables stable and effective electrolytic treatment operations to be carried out smoothly.

被処理材を金属イオンを含む溶液中で電気化学
的に電解処理し、例えば金属表面の電解メツキや
陽極酸化を施したアルミニウムの電解着色をなす
ような場合において、商用交流電流や極性変換電
流などの所謂交番電流が用いられることが多く、
このような場合にはその炭素や金属などによる対
極が、直流電流によつた電解処理のときにおいて
問題とならなかつた種々のトラブルを生ずる。例
えば炭素を対極とすると極性変化のたびに酸化還
元の反応が繰返され、バインダー等の劣化し易い
部分が侵されて脱落などを惹起し、長時間に亘る
安定操業を実施し得ないことになる。又上記のよ
うな交番電流によつて処理すると、このような対
極として好ましい材質の対極は不動態化せしめら
れる傾向が大であり、それによつて性能が劣化さ
れ、この点からも安定した電解操業を実施し得な
い不利を有している。
When the material to be treated is electrochemically treated in a solution containing metal ions, such as electrolytic plating of metal surfaces or electrolytic coloring of anodized aluminum, commercial alternating current, polarity conversion current, etc. A so-called alternating current is often used,
In such cases, the counter electrode made of carbon, metal, etc. causes various problems that would not occur during electrolytic treatment using direct current. For example, if carbon is used as a counter electrode, oxidation-reduction reactions will be repeated every time the polarity changes, and parts that are susceptible to deterioration, such as the binder, will be attacked and fall off, making stable operation over a long period of time impossible. . Furthermore, when treated with the above-mentioned alternating current, the material of the counter electrode that is preferable for the counter electrode has a strong tendency to become passivated, thereby deteriorating its performance. The disadvantage is that it cannot be carried out.

本発明は上記したような実情に鑑み検討を重ね
て創案されたものであつて、上述したような金属
イオン含有処理液中で被処理材と対極との間に交
番電流を供給して電気化学的処理を施すに当り、
前記対極を主対極と補助対極によつて形成し、し
かもその主対極に接続された回路に上記補助対極
に対する回路を並列に連結すると共にアノード電
流の主対極における流れを制御するためのダイオ
ード又はダイオード的作用をなす機構を上記回路
に設けてアノード電流による主対極の劣化ないし
不動態化の防止を図ることを提案するものであ
る。即ちこのような本発明について説明すると、
本発明者等は前記したような交番電流による電気
化学的処理に当つて、対極が不動態化する事由に
ついて仔細な検討をなした結果、対極が陰極とし
てカソード電流が流れることにより処理液中の金
属イオンが対極表面に電析しており、この状態に
続いて該対極にアノード電流が流れはじめると上
記のように電析していた金属が再溶解して電析金
属がなくなつてから電極の酸化反応が生ずること
が判明した。そこで本発明においては上記のよう
に主対極と補助対極とを用い、カソード電流を主
対極から流すことは上記した従来からのものと同
じであるが、アノード電流に対しては少くとも主
対極表面に電析していた金属が再溶解して極の劣
化する前に該主対極に並列に連結された補助対極
からアノード電流を流れしめ、この場合において
補助対極は適宜溶出するとしても不動態化せず、
何れにしても主対極の劣化進行を防止するように
したものである。即ち主対極の劣化はその流れる
電流に比例するものであり、補助対極によつてア
ノード電流を分担すればその劣化は防止できる。
また不動態化するような材料の場合、僅かな不動
態化による電圧の上昇はアノード電流の大部分を
補助対極に流すことになり、それ以上の不動態化
による劣化を生じさせない。
The present invention was devised after repeated studies in view of the above-mentioned circumstances, and is capable of electrochemical processing by supplying an alternating current between a material to be treated and a counter electrode in a treatment solution containing metal ions as described above. When carrying out the processing,
The counter electrode is formed by a main counter electrode and an auxiliary counter electrode, and a diode or a diode for connecting a circuit for the auxiliary counter electrode in parallel to a circuit connected to the main counter electrode and controlling the flow of an anode current in the main counter electrode. The present invention proposes to provide a mechanism in the circuit described above to prevent deterioration or passivation of the main counter electrode caused by the anode current. That is, to explain the present invention as described above,
The present inventors conducted a detailed study on the reason why the counter electrode becomes passivated in electrochemical treatment using an alternating current as described above. Metal ions are deposited on the surface of the counter electrode, and when the anode current starts flowing to the counter electrode, the deposited metal is redissolved as described above, and the electrode is removed after the deposited metal is gone. It was found that an oxidation reaction occurred. Therefore, in the present invention, the main counter electrode and the auxiliary counter electrode are used as described above, and the cathode current is caused to flow from the main counter electrode, which is the same as in the conventional method described above. Before the metal deposited on the electrode is redissolved and the electrode deteriorates, an anode current is passed through the auxiliary counter electrode connected in parallel to the main counter electrode, and in this case, even if the auxiliary counter electrode is eluted, it becomes passivated. Without,
In any case, the main counter electrode is prevented from deteriorating further. That is, the deterioration of the main counter electrode is proportional to the current flowing through it, and this deterioration can be prevented by sharing the anode current with the auxiliary counter electrode.
In addition, in the case of a material that is passivated, a slight increase in voltage due to passivation causes most of the anode current to flow to the auxiliary counter electrode, and no further deterioration due to passivation occurs.

本発明における交番電流とは一般的な商用交流
や極性変換電流などの他に、直流電流と交番電流
を時間的に切換えた電流や、交番電流に直流電流
を重畳させたものの如きを広く意味するものであ
る。又その実施態様は添附図面に示す通りであつ
て、電解槽10の如きに電解液を収容したものに
対してアルミニウム材などの被処理材1と主対極
2を対設して電解処理を行うようにしたものにお
いて、上記主対極2とは別に補助対極3を主対極
2に通ずる回路と並列に形成した回路を設けて併
設し、このような回路にダイオード4を設けて交
番電源5からの給電による処理を行わしめ、アノ
ード時の電流をバイパス回路の補助電極3から流
れるようにする。これらの対極2,3の何れか一
方又は双又は複数枚であつてよい。第1図のもの
においてはバイパス回路にダイオード4が図示の
ように設けられ、アノード電流が主対極2を流れ
はじめることによつて主対極2に電析していた処
理液中金属イオンによる金属が再溶解し、電析金
属がなくなつて酸化反応が生じながら同時に該ダ
イオード4を通じた補助対極3からのアノード通
電が図られて主対極2のアノード通電による劣化
を伴う酸化反応が回避されることは前述の通りで
ある。
In the present invention, alternating current broadly refers to general commercial alternating current and polarity-changing current, as well as current that temporally switches between direct current and alternating current, and alternating current that is superimposed with direct current. It is something. The embodiment is as shown in the attached drawings, and the electrolytic treatment is carried out by placing a material to be treated 1 such as an aluminum material and a main counter electrode 2 facing each other in an electrolyte containing an electrolytic solution, such as an electrolytic bath 10. In this structure, a circuit in which an auxiliary counter electrode 3 is formed in parallel with the circuit leading to the main counter electrode 2 is provided in addition to the main counter electrode 2, and a diode 4 is provided in such a circuit to reduce the voltage from the alternating current power supply 5. Processing is performed by power supply, and the current at the anode is made to flow from the auxiliary electrode 3 of the bypass circuit. Either one, two or more of these counter electrodes 2 and 3 may be used. In the one shown in FIG. 1, a diode 4 is provided in the bypass circuit as shown, and as the anode current begins to flow through the main counter electrode 2, the metal ions in the processing solution deposited on the main counter electrode 2 are removed. While the metal is redissolved and the deposited metal disappears, an oxidation reaction occurs, and at the same time, electricity is supplied to the anode from the auxiliary counter electrode 3 through the diode 4, thereby avoiding an oxidation reaction accompanied by deterioration due to energization of the anode of the main counter electrode 2. is as described above.

前記したダイオード4は場合によつては第2図
に示すようにSCRやサイリスタを用いた自励式
その他のダイオード的機能をもつた機構4aを採
用し得る。又必要に応じて前記ダイオード4又は
4aを補助対極3側に用いることに代え或いはそ
れに併用して主対極2側にダイオード又はダイオ
ード的作用をなす機構その他を反対の関係を以て
設けることができる。
The diode 4 described above may be a self-excited type using an SCR or a thyristor, as shown in FIG. 2, or a mechanism 4a having a diode-like function, depending on the case. Furthermore, if necessary, instead of using the diode 4 or 4a on the auxiliary counter electrode 3 side, or in combination therewith, a diode or a mechanism acting like a diode or the like can be provided on the main counter electrode 2 side in an opposite relationship.

主対極2と補助対極3についてはその面積比を
補助対極3の1に対して主対極2を2分の1〜4
のような範囲で変化せしめ、或ははその形状を変
化せしめて組合わせることができるが、更に材質
の組合わせを採用し、場合によつてはそれらを併
用することができる。この材質の組合わせとし
て、主対極2においてはチタン、ジルコン、タン
グステン、タンタル、炭素又はアルミニウム或い
はそれらの合金材などを採用することができる。
これに対し補助対極3の材質としては陽極として
安定な白金、金、ロジウム、パラジウム等の貴金
属類や鉛、ステンレス鋼、フエライトなどが用い
られる。なお溶出しても電解浴を汚さない金属材
料であれば実用的に支障がなく、例えば電解着色
浴において、Ni浴ではNiを、又Sn浴ではSnを用
いることができるが、各金属の単一極の場合ほど
は浴濃度を変化させることがない。何れにしても
アノード材料として不安定なものを補助対極3に
用いることが必要である。本発明による電解処理
の具体的な実施例について説明すると以下如くで
ある。
Regarding the main counter electrode 2 and the auxiliary counter electrode 3, the area ratio of the main counter electrode 2 to 1 of the auxiliary counter electrode 3 is 1/2 to 4.
It is possible to change the material within a range such as , or to change its shape and combine them, but it is also possible to adopt a combination of materials, and in some cases, to use them in combination. As a combination of materials, titanium, zircon, tungsten, tantalum, carbon, aluminum, or an alloy thereof can be used for the main counter electrode 2.
On the other hand, as the material for the auxiliary counter electrode 3, noble metals such as platinum, gold, rhodium, palladium, lead, stainless steel, ferrite, etc., which are stable as an anode, are used. Note that there is no practical problem as long as the metal material does not contaminate the electrolytic bath even if eluted. For example, in an electrolytic coloring bath, Ni can be used in a Ni bath, and Sn can be used in a Sn bath, but the monomers of each metal can be used. It does not change the bath concentration as much as the unipolar case. In any case, it is necessary to use an unstable anode material for the auxiliary counter electrode 3. A specific example of the electrolytic treatment according to the present invention will be described below.

実施例 1 常法により硫酸浴中で膜厚10μまで陽極酸化し
たJIS A 1100のアルミニウム板を被処理材と
し、第1図に示したような設備において、
NiSO4・6H2Oがげ50g/、MgSO4・7H2Oが20
g/、H3BO4が10g/の浴組成をもつた電解処
理液中に主対極としてAl板を用い、又補助対極
としてPb板を設置してダイオード4を図示の関
係で取付け、交直重畳電流によつて電解着色処理
した。
Example 1 A JIS A 1100 aluminum plate anodized to a film thickness of 10 μm in a sulfuric acid bath by a conventional method was used as the material to be treated, and in the equipment shown in Fig. 1,
NiSO 4・6H 2 O 50g/, MgSO 4・7H 2 O 20
An Al plate was used as the main counter electrode in an electrolytic treatment solution with a bath composition of 10 g/, H 3 BO 4 and 10 g/, and a Pb plate was installed as an auxiliary counter electrode, and the diode 4 was installed in the relationship shown in the figure, and AC/DC superimposed. It was electrolytically colored using electric current.

被処理材たる前記アルミニウム板には均一で美
麗なブロンズ系の着色が得られ、15回に亘る7.5
m2の電解着色処理よつても仕上り状態は同一で主
対極および補助対極の劣化は全く認められなかつ
た。
A uniform and beautiful bronze coloring was obtained on the aluminum plate, which is the material to be treated, and it was coated 7.5 times over 15 times.
Even after electrolytic coloring of m2 , the finished state was the same, and no deterioration of the main counter electrode and the auxiliary counter electrode was observed.

これに対し従来法によりグラフアイトの対極の
みを用いて同じ条件で処理した場合においては、
対極はバインダーの劣化により黒鉛粒の一部脱落
が生じ、浴中に分散した黒鉛粒および溶出したバ
インダーにより浴は黒く着色した。
On the other hand, when using the conventional method and processing under the same conditions using only the opposite electrode of graphite,
In the counter electrode, some of the graphite particles fell off due to deterioration of the binder, and the bath was colored black due to the graphite particles dispersed in the bath and the binder eluted.

実施例 2 主対極にチタンを用いると共に補助対極に鉛を
用い、NiSO4・6H2Oが60g/、H3BO4が40g/
を主成分としたニツケルメツキ浴中において、
脱脂処理した銅板を被処理材として交流電解処理
した。
Example 2 Titanium was used as the main counter electrode, lead was used as the auxiliary counter electrode, NiSO 4 6H 2 O was 60 g/H 3 BO 4 was 40 g/
In the Nikkelmetsuki bath containing as the main ingredient,
A degreased copper plate was used as a material to be treated by alternating current electrolytic treatment.

20回、5m2に亘る電解メツキ処理後においても
主対極、補助対極は何れも劣化することなくメツ
キ処理を継続することができ、又対極からの不安
定なNiイオンの補給がないため浴が安定で管理
の容易な処理をなすことができ、所定の5μの膜
厚分布のメツキ層を均一に得ることができた。
Even after 20 electrolytic plating treatments over 5 m2 , both the main and auxiliary counter electrodes were able to continue plating without deterioration, and because there was no replenishment of unstable Ni ions from the counter electrodes, the bath was stable. The process was stable and easy to manage, and a plating layer with a predetermined thickness distribution of 5 μm could be uniformly obtained.

これに対しチタン極単独の場合は、次第に対極
が酸化し、このために電解電圧が上昇して電流が
著しく減少した。即ち所定の電流値を得るために
は50Vを超える高い電圧を必要とし、好ましい操
業をなし得ないものであつた。
On the other hand, in the case of a titanium electrode alone, the counter electrode gradually oxidized, resulting in an increase in electrolytic voltage and a significant decrease in current. That is, in order to obtain a predetermined current value, a high voltage exceeding 50V was required, and preferred operation could not be achieved.

以上説明したような本発明によれば被処理材を
金属イオンを含有した電解処理液中で交番電流に
より電気化学的に処理するものにおいて、その対
極として主電極と補助電極を用い、しかもこれら
ろ両対極を並列に連結すると共にダイオード又は
ダイオード的作用をなす機構を用いてアノード電
流の主対極における流れを制御すことによりその
劣化を有効に防止し、安定且つ有効な電解処理操
業を円滑に実施し得るものであつて、工業的にそ
の効果の大きい発明である。
According to the present invention as described above, in an apparatus in which a material to be treated is electrochemically treated with an alternating current in an electrolytic treatment solution containing metal ions, a main electrode and an auxiliary electrode are used as counter electrodes, and these electrodes are used as counter electrodes. By connecting both counter electrodes in parallel and controlling the flow of anode current at the main counter electrode using a diode or a mechanism that acts like a diode, its deterioration can be effectively prevented and stable and effective electrolytic treatment operations can be carried out smoothly. This is an invention that has great industrial effects.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明の実施態様を示すものであつて、
第1図は本発明による処理設備の概要を示した説
明図、第2図はその補助対極部分についての変形
例を示した説明図である。 然してこれらの図面において、1は被処理材、
2は主対極、3は補助対極、4はダイオード、4
aはダイオード的機構、5は交番電流電源を示す
ものである。
The drawings illustrate embodiments of the invention,
FIG. 1 is an explanatory diagram showing an outline of the processing equipment according to the present invention, and FIG. 2 is an explanatory diagram showing a modification of the auxiliary counter electrode portion thereof. However, in these drawings, 1 is the material to be treated,
2 is the main counter electrode, 3 is the auxiliary counter electrode, 4 is the diode, 4
a indicates a diode-like mechanism, and 5 indicates an alternating current power supply.

Claims (1)

【特許請求の範囲】[Claims] 1 金属イオンを含む電解処理液中で被処理材と
対極との間に交番電流を供給して電気化学的処理
を施すようにしたものにおいて、前記対極を主対
極と補助対極によつて形成し、該主対極に接続さ
れた回路に上記補助対極に対する回路を並列に連
結すると共にアノード電流の主対極における流れ
を制御するためのダイオード又はダイオード的作
用をなす機構を上記回路に設けたことを特徴とす
る電解処理設備。
1. In an electrochemical treatment in which an alternating current is supplied between a material to be treated and a counter electrode in an electrolytic treatment solution containing metal ions, the counter electrode is formed by a main counter electrode and an auxiliary counter electrode. , characterized in that a circuit for the auxiliary counter electrode is connected in parallel to the circuit connected to the main counter electrode, and the circuit is provided with a diode or a mechanism acting like a diode for controlling the flow of anode current in the main counter electrode. Electrolytic treatment equipment.
JP5091082A 1982-03-31 1982-03-31 Electrolytic treatment installation Granted JPS58171595A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5091082A JPS58171595A (en) 1982-03-31 1982-03-31 Electrolytic treatment installation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5091082A JPS58171595A (en) 1982-03-31 1982-03-31 Electrolytic treatment installation

Publications (2)

Publication Number Publication Date
JPS58171595A JPS58171595A (en) 1983-10-08
JPS6148596B2 true JPS6148596B2 (en) 1986-10-24

Family

ID=12871929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5091082A Granted JPS58171595A (en) 1982-03-31 1982-03-31 Electrolytic treatment installation

Country Status (1)

Country Link
JP (1) JPS58171595A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100697A (en) * 1983-11-02 1985-06-04 Fuji Photo Film Co Ltd Electrolytic treatment
JP2660582B2 (en) * 1989-08-21 1997-10-08 富士写真フイルム株式会社 Electrolytic treatment method

Also Published As

Publication number Publication date
JPS58171595A (en) 1983-10-08

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