JPS6312154B2 - - Google Patents
Info
- Publication number
- JPS6312154B2 JPS6312154B2 JP24301083A JP24301083A JPS6312154B2 JP S6312154 B2 JPS6312154 B2 JP S6312154B2 JP 24301083 A JP24301083 A JP 24301083A JP 24301083 A JP24301083 A JP 24301083A JP S6312154 B2 JPS6312154 B2 JP S6312154B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- gas
- metal
- liquid interface
- carbide
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 13
- 238000010891 electric arc Methods 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 7
- 230000007797 corrosion Effects 0.000 claims description 7
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000009760 electrical discharge machining Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021404 metallic carbon Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
- Electrolytic Production Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は、電解用金属電極板の防蝕法であつ
て、その目的とするところは電解液中に懸吊され
ている電極板の気液境界面の浸蝕を防止し、長期
間の連続操業に堪え得る金属電極板たらしめる方
法を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for preventing corrosion of metal electrode plates for electrolysis, and its purpose is to prevent corrosion of the gas-liquid interface of the electrode plate suspended in an electrolyte. The object of the present invention is to provide a method for producing a metal electrode plate that can withstand long-term continuous operation.
一般に、銅、亜鉛その他各種の金属の電解採取
は電解槽中に電解液として酸性またはアルカリ性
の溶液を用い、これに各種金属板からなる電極板
を懸吊し電解している。 In general, electrolytic extraction of copper, zinc, and other various metals involves using an acidic or alkaline solution as an electrolytic solution in an electrolytic cell, and suspending electrode plates made of various metal plates thereon for electrolysis.
電極板は第１図に示すように、電解槽１内部の
電解液２に、ビーム３から電極板４を垂下して電
解液２中に浸漬されている。電極板４は電解によ
つて生じた気体５が発生しており、これが電解液
面６で泡立つため、電極板４の気液境界面付近に
泡立ちによつて生ずるミスト７が飛散し付着す
る。 As shown in FIG. 1, the electrode plate is immersed in an electrolytic solution 2 inside an electrolytic cell 1, with an electrode plate 4 hanging down from a beam 3. Gas 5 generated by electrolysis is generated in the electrode plate 4, and this bubbles on the electrolyte surface 6, so that mist 7 generated by the bubbling scatters and adheres to the vicinity of the gas-liquid interface of the electrode plate 4.
ところが、電解操業においては、一般に電解液
の温度を高めた方が効率がよいので電極板自体も
電解液温度付近になつており、前記電極板４に付
着したミスト７は次第に濃縮された強酸または強
アルカリの液となり或いは金属塩等を析出し、こ
れらに起因して電極板４の気液境界面が徐々に浸
食され、甚だしい場合には浸蝕によつて孔があく
という欠点がある。 However, in electrolytic operation, it is generally more efficient to raise the temperature of the electrolyte, so the electrode plate itself is also at a temperature near the electrolyte temperature, and the mist 7 attached to the electrode plate 4 gradually becomes a concentrated strong acid or It becomes a strong alkaline liquid or precipitates metal salts, etc., and due to these, the gas-liquid interface of the electrode plate 4 is gradually eroded, and in severe cases, holes are formed due to the erosion.
従来、前記のごとき電極板浸蝕の防止対策とし
て、非金属製のカーボン製電極が使用されている
が、カーボン電極は重い上に割れ易いという欠点
がある。 Conventionally, non-metallic carbon electrodes have been used as a measure to prevent electrode plate corrosion as described above, but carbon electrodes have the drawbacks of being heavy and easily broken.
また、金属製電極では、気液境界面を弗素樹脂
等を焼付けてコーテイングする方法も考えられる
が、機能的に満足するためにはコーテイングを少
なくともピンホールの無い厚さ、即ち300ミクロ
ン以上にする必要があり、このためには数回の焼
付工程がいるのでコストが高く、実用性に乏しい
という欠点がある。 In addition, for metal electrodes, it is possible to coat the gas-liquid interface by baking fluororesin, but in order to achieve functional satisfaction, the thickness of the coating must be at least 300 microns or more without pinholes. This requires several baking steps, resulting in high cost and poor practicality.
本発明者は、金属電極板の前記浸蝕を防止する
ため研究の結果、特許請求の範囲に記載した構成
とすることによつて簡単かつ廉価に浸蝕を防止で
きる方法を得ることができた。 As a result of research to prevent the corrosion of metal electrode plates, the inventors of the present invention were able to obtain a method for preventing corrosion easily and inexpensively by using the structure described in the claims.
即ち、本発明は、金属電極板の気液境界面に、
電弧によつてチタンカーバイドまたはタングステ
ンカーバイドの被膜を形成することを特徴とする
電解用金属板の防蝕法である。 That is, in the present invention, on the gas-liquid interface of the metal electrode plate,
This is a corrosion prevention method for electrolytic metal plates, which is characterized by forming a titanium carbide or tungsten carbide coating using an electric arc.
本発明で対象とする金属電極板はチタン製電極
板であるが、これに限定されるものではなく、電
極板自体が生成したチタンまたはタングステンカ
ーバイドより電位傾度が卑である金属極であれば
よい。このことは、生成したチタンまたはタング
ステンカーバイドと電極板地金とは、電解液中で
電池を形成するが、電極板地金が卑であれば、電
解液中に溶出しない、即ち防蝕側に位置している
からである。 The metal electrode plate targeted by the present invention is a titanium electrode plate, but is not limited to this, and any metal electrode whose potential gradient is less base than the titanium or tungsten carbide produced by the electrode plate itself may be used. . This means that the produced titanium or tungsten carbide and the electrode base metal form a battery in the electrolyte, but if the electrode base metal is base, it will not dissolve into the electrolyte, that is, it will be located on the corrosion-resistant side. This is because they are doing so.
これら金属電極板にチタンカーバイドまたはタ
ングステンカーバイドの被膜を形成するのは電弧
によつて簡単に形成できる。即ち、電弧棒として
チタンまたはタングステン等の金属と炭素との混
合物からなるものが使用できる。もつとも、電極
板がチタンである場合には電弧棒として炭素製の
ものを用いてもよい。 A titanium carbide or tungsten carbide coating can be easily formed on these metal electrode plates by electric arc. That is, the electric arc rod may be made of a mixture of carbon and a metal such as titanium or tungsten. However, if the electrode plate is made of titanium, the arc rod may be made of carbon.
前記チタンカーバイドまたはタングステンカー
バイドの被膜は金属電極板の気液境界面を中心と
し、電極板の両面および両端部を帯状に回らして
形成するのもであつて、アーク放電器の一端を電
極板に接続し、他端を電弧棒に接続し、電弧棒の
先端でカーバイドの被膜を形成する部分の表面を
なでるようにしてアークを飛ばして被膜を形成す
ればよい。また、この場合、カーバイド被膜を形
成する部分に予め炭素粉末を薄く塗布して放電加
工すれば、更に良好な合金層を形成することがで
きる。なお、放電加工の場合、小さいアーク電流
たとえばDC15A程度として放電加工を行なう。 The titanium carbide or tungsten carbide film is formed by wrapping around the gas-liquid interface of the metal electrode plate in a band shape on both sides and both ends of the electrode plate, so that one end of the arc discharger is connected to the electrode plate. , connect the other end to an electric arc rod, and form the coating by stroking the surface of the area where the carbide coating is to be formed with the tip of the electric arc rod to blow an arc. Furthermore, in this case, if a thin layer of carbon powder is applied in advance to the portion where the carbide coating is to be formed and electrical discharge machining is performed, an even better alloy layer can be formed. In the case of electric discharge machining, the electric discharge machining is performed with a small arc current, for example, about 15A DC.
以上のごとき放電加工によつて金属電極板の気
液境界面付近にチタンカーバイドまたはタングス
テンカーバイドの20〜30ミクロン程度の被膜が形
成され、これらカーバイドの被膜は、放電加工に
よつて電極板を形成している金属表面で所謂合金
層を形成しており、カーバイド被膜が剥落するお
それはなく、また電極板の表面のみの加工である
ため、電解には何等支障はなく、長期間使用する
ことができる。 By the electric discharge machining described above, a film of titanium carbide or tungsten carbide of about 20 to 30 microns is formed near the gas-liquid interface of the metal electrode plate, and these carbide films form the electrode plate by the electric discharge machining. A so-called alloy layer is formed on the metal surface, so there is no risk of the carbide coating peeling off, and since only the surface of the electrode plate is processed, there is no problem with electrolysis and it can be used for a long time. can.
さらに本発明は電極板の気液境界面のみを放電
加工によつてカーバイド被膜が形成できるため、
作業は簡単であり、従来の金属電極板にも簡単に
適用でき、しかもコストは低廉である。 Furthermore, in the present invention, since a carbide film can be formed only on the gas-liquid interface of the electrode plate by electrical discharge machining,
The work is simple, it can be easily applied to conventional metal electrode plates, and the cost is low.
第２図は本発明の一実施例を示したもので、つ
ぎに第２図に基づいて本発明を具体的に説明す
る。 FIG. 2 shows an embodiment of the present invention. Next, the present invention will be specifically explained based on FIG.
アーク放電器８の一極にリード線９を取付け、
該リード線９の他端を電極板１０に接続し、他方
アーク放電器８の他極にリード線１１を接続し、
他方アーク放電器８の他極にリード線１１を接続
し、その他端に電弧棒１２を接続する。 Attach the lead wire 9 to one pole of the arc discharger 8,
The other end of the lead wire 9 is connected to the electrode plate 10, and the lead wire 11 is connected to the other pole of the arc discharger 8.
On the other hand, a lead wire 11 is connected to the other pole of the arc discharger 8, and an electric arc rod 12 is connected to the other end.
ついで、前記電弧棒１２を電極板１０の気液境
界面部分１３に、電弧棒１２によつてアーク放電
を行なつて気液境界面部分１３にカーバイドの被
膜を形成する。放電加工に要する時間は極めて短
時間であり、処理も簡単である。 Then, arc discharge is applied to the gas-liquid interface portion 13 of the electrode plate 10 using the electric arc rod 12 to form a carbide film on the gas-liquid interface portion 13. The time required for electrical discharge machining is extremely short and the process is simple.
第１図は電解時の電解槽内の状態の説明図、第
２図は本発明の一実施例の説明図である。
８…アーク放電器、９，１１…リード線、１０
…電極板、１２…電弧棒、１３…気液境界面。
FIG. 1 is an explanatory diagram of the state inside the electrolytic cell during electrolysis, and FIG. 2 is an explanatory diagram of an embodiment of the present invention. 8... Arc discharger, 9, 11... Lead wire, 10
... Electrode plate, 12 ... Electric arc rod, 13 ... Gas-liquid interface.
Claims (1)
タンカーバイドまたはタングステンカーバイドの
被膜を形成することを特徴とする電解用金属電極
板の防蝕法。1. A method for preventing corrosion of a metal electrode plate for electrolysis, which comprises forming a film of titanium carbide or tungsten carbide on the gas-liquid interface of the metal electrode plate using an electric arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24301083A JPS60135591A (en) | 1983-12-22 | 1983-12-22 | Method for preventing corrosion of metallic electrode plate for electrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24301083A JPS60135591A (en) | 1983-12-22 | 1983-12-22 | Method for preventing corrosion of metallic electrode plate for electrolysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60135591A JPS60135591A (en) | 1985-07-18 |
| JPS6312154B2 true JPS6312154B2 (en) | 1988-03-17 |
Family
ID=17097541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24301083A Granted JPS60135591A (en) | 1983-12-22 | 1983-12-22 | Method for preventing corrosion of metallic electrode plate for electrolysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60135591A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4020169B2 (en) * | 1997-10-03 | 2007-12-12 | 株式会社石塚研究所 | Electrode rod for spark welding using combustion synthesis reaction, its production method, and spark-welded metal coating method using this electrode |
| JP4524248B2 (en) * | 2005-12-12 | 2010-08-11 | ペルメレック電極株式会社 | Copper collection method |
-
1983
- 1983-12-22 JP JP24301083A patent/JPS60135591A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60135591A (en) | 1985-07-18 |
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