JPS5943994B2 - Electrode for electrolysis - Google Patents
Electrode for electrolysisInfo
- Publication number
- JPS5943994B2 JPS5943994B2 JP54116866A JP11686679A JPS5943994B2 JP S5943994 B2 JPS5943994 B2 JP S5943994B2 JP 54116866 A JP54116866 A JP 54116866A JP 11686679 A JP11686679 A JP 11686679A JP S5943994 B2 JPS5943994 B2 JP S5943994B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- electrode
- metal
- electrolysis
- corrosion
- 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
Links
Landscapes
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は電解用電極に関し、さらに詳しくは、電気メッ
キ、電解精錬、ソーダ電解等の各種電気化学工業の分野
に用いられる電解用電極に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrode for electrolysis, and more particularly to an electrode for electrolysis used in various fields of electrochemical industry such as electroplating, electrolytic refining, and soda electrolysis.
一般に、電気化学工業の分野においては、従来から種々
の電解用電極が使用されているが、その一例として、Ｔ
ｉ等の耐蝕性金属基体士にＰｔ等の貴金属を被覆して構
成された電解用電極が実用に供されている。Generally, in the field of electrochemical industry, various electrodes for electrolysis have been used for a long time, and one example is T.
Electrolytic electrodes constructed by coating a corrosion-resistant metal substrate such as Pt with a noble metal such as Pt are in practical use.
このように構成された電極は、電気化学工業の分野にお
いて電極として要求される優れた耐蝕性と、良好な電極
特性とを併せ備えているものである。しかしながら、こ
の電極においては、長期間の使用に伴なつて被覆されて
いる貴金属が剥離するという現象が生じて、そのため、
電極特性を徐々に劣化させるという根本的な、かつ、重
大な欠陥が存在していたのである。The electrode constructed in this manner has both excellent corrosion resistance and good electrode properties required for electrodes in the field of electrochemical industry. However, with this electrode, a phenomenon occurs in which the coated precious metal peels off after long-term use, and as a result,
There existed a fundamental and serious flaw that caused the electrode properties to gradually deteriorate.
即ち、耐食性金属基体土に貴金属をメッキ或いは溶射に
より貴金属被覆層を形成した電極では、この貴金属被覆
層が多孔質となり、しかもこれには無数の微小なピンホ
ールが存在する。That is, in an electrode in which a noble metal coating layer is formed by plating or thermal spraying a noble metal on a corrosion-resistant metal substrate, the noble metal coating layer is porous and has countless minute pinholes.
そのため、毛細管現象による間隙腐蝕が生じたり、或い
は、ピンホールの近傍に電流が集中して流れるようにな
つて局部的に過大な負荷が加わり、このピンホールの部
分から剥離現象が生じて遂には電極特性が劣化するもの
と考えられる。このような問題を解決するために、耐蝕
性金属基体土に改良した被覆方法により貴金属を被覆し
たり、或いは、貴金属被覆後に真空中で加熱処理して耐
食性金属基体と貴金属との間に熱拡散を生じさせたり、
さらには、この熱拡散を助長するためにショットピーニ
ングを併用したりすることが行なわれている。As a result, gap corrosion occurs due to capillary action, or current flows in the vicinity of the pinhole in a concentrated manner, resulting in an excessive load being applied locally, causing peeling from the pinhole area, and eventually causing damage. It is thought that the electrode characteristics deteriorate. In order to solve these problems, it is possible to coat the corrosion-resistant metal substrate with precious metal using an improved coating method, or to apply heat treatment in vacuum after coating the precious metal to create heat diffusion between the corrosion-resistant metal substrate and the precious metal. or cause
Furthermore, shot peening is also used in combination to promote this thermal diffusion.
しかし、このようなことは、何れも処理工程が煩雑であ
つたり、或いは、その作業上の管理が困難であつたりし
て多大の労力および時間がかかり、さらに、費用が高く
つくという問題があつた。本発明は上記したような電気
化学工業において使用されている電極の問題や製洗上の
問題等を解消したものであつて、電極としての特性をよ
り優れたものとした電解用電極である。However, all of these problems involve complicated processing steps or difficult management, which requires a great deal of labor and time, as well as high costs. Ta. The present invention solves the above-mentioned problems with electrodes used in the electrochemical industry, problems with washing, etc., and provides an electrode for electrolysis with even more excellent characteristics as an electrode.
本発明に係る電解用電極の特徴とするところは、耐蝕性
金属または合金の表面に網状、線状、縞状、格子状或い
は水玉状の貴金属被覆が設けられており、かつ、上記貴
金属被膜以外の部分に他の金属、合金または金属酸化物
の被膜が設けられていることにある。The electrode for electrolysis according to the present invention is characterized in that a noble metal coating is provided on the surface of a corrosion-resistant metal or alloy in the form of a net, line, stripe, lattice, or polka dot shape, and The reason is that a coating of another metal, alloy, or metal oxide is provided on the part.
本発明に係る電解用電極において、耐蝕性金属または合
金は、Ｔｉ、Ｚｒ、Ｔａ、Ｎｂ、またはこれらの合金を
示し、また、貴金属はＰを、Ｒｕ、ＲｈＰｄ、Ｏｓ、Ｉ
ｒまたはこれらの合金を示す。In the electrolytic electrode according to the present invention, the corrosion-resistant metal or alloy is Ti, Zr, Ta, Nb, or an alloy thereof, and the noble metal is P, Ru, RhPd, Os, I
r or an alloy thereof.
貴金属以外の金属、合金または金属酸化物は、Ａｕ、Ａ
ｇまたはこれらの合金で、その他金属酸化物半導体、例
えば、ｓｎｏ２、２ｎｏ等、およびＰｂＯ２等を示すの
である。本発明に係る電解用電極においては、貴金属が
耐蝕性金属表面に網状、線状、縞状、格子状或いは水玉
状に被膜が形成されており、この貴金属被膜以外の部分
には他の金属、合金、金属酸化物の被膜が形成されてい
るもので、そして、これらの被膜はメツキ、浴射、焼付
け或いは蒸着等によつて、即ち、先づ、耐蝕性金属等の
表面に貴金属被膜を、例えば、メツキにより形成し、そ
の後貴金属被膜を覆い、次いで、他の金属等を溶射等に
より形成して電解用電極を作る。Metals, alloys or metal oxides other than noble metals include Au, A
g or alloys thereof, and other metal oxide semiconductors, such as sno2, 2no, etc., and PbO2, etc. In the electrode for electrolysis according to the present invention, a noble metal coating is formed on the corrosion-resistant metal surface in the form of a net, line, stripe, lattice, or polka dot shape, and other metals, A coating of an alloy or metal oxide is formed, and these coatings are formed by plating, bath irradiation, baking, vapor deposition, etc. In other words, first, a noble metal coating is applied to the surface of a corrosion-resistant metal, etc. For example, it is formed by plating, then covered with a noble metal film, and then another metal or the like is formed by thermal spraying or the like to make an electrode for electrolysis.
以下、耐蝕性金属をＴ１、貴金属をＰｔｌ貴金属以外の
部分に形成される金属、合金、金属酸化物をＡｕに代表
して説明する。Hereinafter, the corrosion-resistant metal will be described as T1, the noble metal as Ptl, and the metal, alloy, and metal oxide formed in the parts other than the noble metal as representative of Au.
また、網状、線状、縞状、格子状．水玉状は網状として
説明する。本発明に係る電解用電極において、Ｔｉ表面
土に網状のＰｔ被膜とこれ以外にＡｕ被膜を形成するの
は上記に説明したようにＴｉ表面の全面にわたつてＰｔ
被膜をすると、電解中に電解時に発生する有害物質のた
めにＰｔが剥離して消耗が早くなり、電極を早期に取替
なければならなくなるが、Ｐｔ被膜が網状に形成され、
かつ、このＰｔ被膜以外の部分にＡｕ被膜が形成されて
いるので、電解中においては、Ｐｔ被膜はＰｔのみの固
有の電解作用を行ない、かつ、Ａｕ被膜はＰｔとは異な
るＡｕのみの固有の電解作用を行ない、これらのＰｔ，
Ａｕの固有の電解作用が同時に行なわれることによつて
Ｐｔ被膜は剥離することなく、長期間の電解に使用する
ことができるのである。また、本発明に係る電解用電極
において、その構造としてＴｉ金属よりなる棒状或いは
板状のもの、或いは導電性金属または合金、例えば、Ａ
ｌ，Ａｌ合金、Ｃｕ，Ｃｕ合金にＴｉ金属を被覆した二
重構造としたものでもよい。次に、本発明に係る電解用
電極について、図面に示す例により詳細に説明する。Also, net-like, linear, striped, and lattice-like. The polka dot shape will be explained as a net shape. In the electrode for electrolysis according to the present invention, the purpose of forming a net-like Pt film and an Au film on the Ti surface soil is to form a Pt film over the entire Ti surface as explained above.
If a coating is applied, the Pt peels off due to harmful substances generated during electrolysis and wears out quickly, making it necessary to replace the electrode early. However, the Pt coating is formed in a network shape,
Moreover, since the Au film is formed on the parts other than this Pt film, during electrolysis, the Pt film performs the electrolytic action unique to only Pt, and the Au film performs the unique electrolysis action of only Au, which is different from Pt. These Pt,
Since the unique electrolytic action of Au takes place at the same time, the Pt film does not peel off and can be used for long-term electrolysis. Further, in the electrolytic electrode according to the present invention, the structure thereof is a rod-shaped or plate-shaped one made of Ti metal, or a conductive metal or alloy, such as A
It may also have a double structure in which a Ti metal is coated on a Ti metal, an Al alloy, or a Cu alloy. Next, the electrode for electrolysis according to the present invention will be explained in detail using examples shown in the drawings.
第１図ａはＰｔ被膜１を格子状に、そして、Ｐｔ被膜１
以外の部分にＡｕ被膜２を棒状Ｔ１表面にそれぞれ設け
たものである。Figure 1a shows the Pt coating 1 arranged in a grid pattern and the Pt coating 1
The Au coating 2 is provided on the surface of the rod-shaped T1 at the other parts.
第１図ｂはＰｔ被膜１を網状に、そして、Ｐｔ被膜１以
外の部分にＡｕ被膜２を棒状Ｔｌ表面にそれぞれ設けた
ものである。In FIG. 1b, a Pt coating 1 is provided in a net shape, and an Au coating 2 is provided on the surface of a rod-shaped Tl in a portion other than the Pt coating 1.
第１図ｃはＰｔ被膜１が縦長に、Ｐｔ被膜１以外にはＡ
ｕ被膜２Ｔ１表面にそれぞれ設けたものである。In Figure 1c, the Pt coating 1 is vertically long, and the parts other than Pt coating 1 are A-shaped.
These are provided on the surface of the u coating 2T1.
第１図ｄはＰｔ被膜１を横長に、かつ、Ｐｔ被膜１以外
の部分にＡｕ被膜２を棒状Ｔｌ表面にそれぞれ設けたも
のである。In FIG. 1d, the Pt coating 1 is horizontally elongated, and the Au coating 2 is provided on the surface of the rod-shaped Tl in the areas other than the Pt coating 1.
第１図ｅはＰｔ被膜１は水玉状に、かつ、それ以外の部
分にはＡｕ被膜２がそれぞれＴｌ表面に設けられたもの
である。In FIG. 1e, the Pt coating 1 is provided in a polka dot shape, and the Au coating 2 is provided on the Tl surface in the other areas.
第２図ａは棒状Ｔｌ３表面にＰｔ被膜１とＡｕ被膜２が
設けられている断面図である。FIG. 2a is a cross-sectional view in which a Pt coating 1 and an Au coating 2 are provided on the surface of the rod-shaped Tl3.
第２図ｂは棒状の導電性金属、例えば、Ａｌ５の土にＴ
ｉ４を被覆し、その表面にＰｔ被膜１とＡｕ被膜２が設
けられている断面図である。Figure 2b shows a rod-shaped conductive metal, for example, T on soil made of Al5.
FIG. 4 is a cross-sectional view showing a Pt coating 1 and an Au coating 2 provided on the surface of the Pt coating 1 and the Au coating 2.
第３図ａは板状のＴｉ表面に横向きにＰｔ被膜１とＰｔ
被膜１以外の部分にＡｕ被膜２がそれぞれ設けられてい
る。Figure 3a shows a Pt film 1 and a Pt film placed horizontally on a plate-shaped Ti surface.
An Au coating 2 is provided on each portion other than the coating 1.
第３図ｂはＰｔ被膜１網状に、かつ、このＰｔ被膜１以
外の部分にＡｕ被膜２が板状Ｔｌ表面に設けられている
。In FIG. 3b, a Pt coating 1 is provided in a net shape, and an Au coating 2 is provided on the surface of the plate-like Tl in a portion other than the Pt coating 1. In FIG.
第４図ａは板状Ｔｌ７の表面にＰｔ被膜１とＡｕ被膜２
が設けられでいる断面図である。Figure 4a shows a Pt coating 1 and an Au coating 2 on the surface of the plate Tl7.
FIG.
第４図ｂは板状Ａｌ８の土にＴｌ７が被覆されており、
このＴｌ７表面にＰｔ被膜１とＡｕ被膜２が設けられて
いる断面図である。In Figure 4b, Tl7 is coated on plate-shaped Al8 soil.
It is a sectional view in which a Pt coating 1 and an Au coating 2 are provided on the surface of this Tl7.
以上詳細に説明し２たように、本発明に係る電解用電極
は、貴金属被膜が剥離することなく長期間使用しても電
極特性が劣化することなく、貴金属と貴金属以外の金属
、合金、金属酸化物が耐食性金属表面に設けられている
ので、それぞれ固有の電解作用を行なうから効率は極め
て良好であり、かつ、高価な貴金属が少なくてすむとい
う効果がある。As described in detail above and described in 2, the electrode for electrolysis according to the present invention can be used with noble metals, metals other than noble metals, alloys, and Since the oxides are provided on the surface of the corrosion-resistant metal, each performs its own electrolytic action, resulting in extremely high efficiency and the effect that less expensive precious metals are needed.
第１図Ａ，ｂ，ｃ，ｄ，ｅは本発明に係る電解用電極の
棒状の場合の例を示す側面図、第２図Ａ，ｂは同じく断
面図、第３図Ａ，ｂは本発明に係る電解用電極の板状の
場合の例を示す平面図、第４図Ａ，ｂは同じく断面図で
ある。Figures 1A, b, c, d, and e are side views showing examples of rod-shaped electrodes for electrolysis according to the present invention, Figures 2A and b are sectional views, and Figures 3A and b are main views. A plan view showing an example of a plate-shaped electrode for electrolysis according to the invention, and FIGS. 4A and 4B are sectional views as well.
Claims (1)
格子状或いは水玉状の貴金属被膜が設けられており、か
つ、上記貴金属被膜以外の部分に他の金属、合金または
金属酸化物の被膜が設けられていることを特徴とする電
解用電極。1. Net-like, linear, striped, etc. on the surface of corrosion-resistant metal or alloy.
An electrode for electrolysis, characterized in that a noble metal coating is provided in a lattice shape or a polka dot shape, and a coating of another metal, alloy, or metal oxide is provided in a portion other than the noble metal coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54116866A JPS5943994B2 (en) | 1979-09-12 | 1979-09-12 | Electrode for electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54116866A JPS5943994B2 (en) | 1979-09-12 | 1979-09-12 | Electrode for electrolysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5641394A JPS5641394A (en) | 1981-04-18 |
| JPS5943994B2 true JPS5943994B2 (en) | 1984-10-25 |
Family
ID=14697562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54116866A Expired JPS5943994B2 (en) | 1979-09-12 | 1979-09-12 | Electrode for electrolysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5943994B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0417573Y2 (en) * | 1988-04-28 | 1992-04-20 | ||
| IT1279069B1 (en) * | 1995-11-22 | 1997-12-04 | Permelec Spa Nora | IMPROVED ELECTRODE TYPE FOR ION EXCHANGE MEMBRANE ELECTROLYZERS |
| EP1242650B1 (en) * | 1999-12-03 | 2003-06-11 | Caterpillar Inc. | Patterned hydrophilic-oleophilic metal oxide coating and method of forming |
-
1979
- 1979-09-12 JP JP54116866A patent/JPS5943994B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5641394A (en) | 1981-04-18 |
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