JP4789542B2 - Electrodes for electrode protection and electrode device - Google Patents

Electrodes for electrode protection and electrode device Download PDF

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JP4789542B2
JP4789542B2 JP2005236484A JP2005236484A JP4789542B2 JP 4789542 B2 JP4789542 B2 JP 4789542B2 JP 2005236484 A JP2005236484 A JP 2005236484A JP 2005236484 A JP2005236484 A JP 2005236484A JP 4789542 B2 JP4789542 B2 JP 4789542B2
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忠彦 大庭
正信 南
一美 冨永
孝志 久保田
力 元尾
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株式会社ナカボーテック
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Description

本発明は、復水器、熱交換器等の金属製機器類を海水等の腐食性液体による腐食から防止するための電気防食用電極体及び電極装置に関し、より詳しくは電極体の交換を簡便化し、かつ電極体そのものの長寿命化が達成され、経済性に優れ、また産業廃棄物を低減させることができる電気防食用電極体及び電極装置に関する。   The present invention relates to an electrode member for electrode protection and an electrode device for preventing metal equipment such as a condenser and a heat exchanger from being corroded by a corrosive liquid such as seawater. More specifically, the electrode member can be easily replaced. In addition, the present invention relates to an electrode body for electrode protection and an electrode device that can achieve a longer life of the electrode body itself, are excellent in economic efficiency, and can reduce industrial waste.

従来、復水器、熱交換器等の金属製機器類は、鉄、銅、チタン等の金属から構成され、腐食を防止するためその表面に防食塗装がなされている。   Conventionally, metal equipment such as condensers and heat exchangers is made of metal such as iron, copper, titanium, and the like, and its surface is anticorrosive to prevent corrosion.

しかし、防食塗装の一部にピンホールが生じた場合には、金属が露出し、そこに局部電池が形成され、金属がイオン化し、海水等の電解液中に溶出する。このため、金属の露出部分に腐食が生成することとなる。   However, when a pinhole occurs in a part of the anticorrosion coating, the metal is exposed, a local battery is formed there, and the metal is ionized and eluted into an electrolyte such as seawater. For this reason, corrosion will generate | occur | produce in the exposed part of a metal.

このため、上記金属機器類には電気防食用電極装置を設置し、電気防食が行われている。このような電気防食用電極装置に用いられる電極としては、鉛銀合金製のものが用いられていた。   For this reason, an electrode device for anticorrosion is installed in the metal equipment, and the anticorrosion is performed. As an electrode used for such an electrode apparatus for anticorrosion, the thing made from a lead silver alloy was used.

ところが、この鉛銀合金製電極は、電極表面積当たりの単位発生電流が小さく、消耗率が大きい。そこで、電極形状を大きくするか、電極数を多くしなければならないという不都合が生じる。また、鉛を使用することから廃棄処分等において環境性の点からも問題がある。   However, this lead-silver alloy electrode has a small unit generated current per electrode surface area and a large consumption rate. Therefore, there arises a disadvantage that the electrode shape must be increased or the number of electrodes must be increased. Moreover, since lead is used, there is a problem from the viewpoint of environment in disposal and the like.

そこで、特許文献1(特公昭42−23810号公報)等に示されるように、電極表面積当たりの単位発生電流が大きく、消耗率が小さい電極としてチタン等の不導態金属の表面に、白金等の貴金属をメッキ又は溶射した貴金属被覆層を有する不溶性電極が従来より提案されている。   Therefore, as disclosed in Patent Document 1 (Japanese Patent Publication No. 42-23810) and the like, platinum or the like is formed on the surface of a non-conductive metal such as titanium as an electrode having a large unit generated current per electrode surface area and a low consumption rate. Conventionally, an insoluble electrode having a noble metal coating layer plated or sprayed with a noble metal has been proposed.

このような不溶性電極は、不導態金属の表面に形成された貴金属被覆層によって発生電流密度が定められる。このため貴金属被覆層を有効に利用し、不溶性電極の長寿命化を図る種々の試みがなされている。例えば特許文献2(特公平3−43354号公報)には、表面にイオン照射処理又はイオンミキシング処理を施すことによって、不導態金属の表面への露出等を防止することにより、不溶性電極を長寿命化することが記載されているが、不溶性電極の長寿命化には限度がある。   Such an insoluble electrode has a generated current density determined by a noble metal coating layer formed on the surface of the non-conductive metal. For this reason, various attempts have been made to effectively utilize the precious metal coating layer and extend the life of the insoluble electrode. For example, in Patent Document 2 (Japanese Patent Publication No. 3-43354), the surface is subjected to ion irradiation treatment or ion mixing treatment, thereby preventing exposure of the non-conductive metal to the surface and the like. Although it is described that the life is extended, there is a limit to extending the life of the insoluble electrode.

不溶性電極は、上述のように、表面に形成された貴金属被覆層によって発生電流密度が定められるため、チタン等の不導態金属は表面が有効に利用できればよい。高価な不導態金属を必要以上に使用することは、電極コストを引き上げることになり、非常に不経済である。そのため、従来の不溶性電極は、経済的観点から線状又は筒状に形成して使用するのが一般的である。しかし、このような形状の不溶性電極は、水流等の物理的影響に弱く、また短絡事故等を起こす恐れがあった。   As described above, since the generated current density is determined by the noble metal coating layer formed on the surface of the insoluble electrode, it is sufficient that the surface of the nonconductive metal such as titanium can be effectively used. Use of an expensive non-conductive metal more than necessary increases the electrode cost and is very uneconomical. Therefore, the conventional insoluble electrode is generally used in the form of a line or a cylinder from the economical viewpoint. However, the insoluble electrode having such a shape is vulnerable to physical influences such as water flow, and may cause a short circuit accident.

また、不溶性電極の表面に被覆された貴金属被覆層の消耗後に残されたチタン等の不導態金属は、使用可能な状態にも拘われらず、廃棄処分されており、極めて不経済である。   In addition, non-conductive metals such as titanium left after consumption of the precious metal coating layer coated on the surface of the insoluble electrode are disposed of regardless of the usable state and are extremely uneconomical. .

上記金属機器類、例えば復水器に不溶性電極を設置するには、不溶性電極を電極受体に取り付けフランジ型電極装置として使用し、電極を交換する際には、フランジ型電極装置に外足場を組み、フランジ型電極装置と水室外の通電用ケーブルと電線管を取り外す必要がある。また、交換後に、水密検査、ケーブルの接続、電線管の復旧作業が伴う。また、電極と電極受体は一体構造となっているので、交換後は、白金等の貴金属を回収するため電極を切断して貴金属を回収する必要が生じる。   In order to install an insoluble electrode in the above metal equipment, for example, a condenser, the insoluble electrode is attached to an electrode receiver and used as a flange type electrode device. It is necessary to remove the flange type electrode device, the energizing cable outside the water chamber, and the conduit. In addition, after the replacement, watertight inspection, cable connection, and conduit restoration work are involved. In addition, since the electrode and the electrode receiver have an integral structure, it is necessary to recover the noble metal by cutting the electrode after the replacement in order to recover the noble metal such as platinum.

上述した課題の一つの対策として、不溶性電極の交換を容易にするため、電極と電極受体を取り外し可能とした電気防食用電極装置が提案されている。特許文献3(実公昭57−55330号公報)には、絶縁リングが嵌入固定された金属製筒状支持マウントがフランジ当板を介して機器類内壁に貫通固定され、支持マウントに不導態金属製ボルトが貫通固定され、このボルトの内壁側突端部に、不導態金属製筒状体の表面に貴金属層が形成された不溶性陽極がネジ込まれている電気防食用電極装置が記載されている。   As one countermeasure against the above-described problem, an electrode apparatus for cathodic protection in which an electrode and an electrode receiver can be removed has been proposed in order to facilitate replacement of an insoluble electrode. In Patent Document 3 (Japanese Utility Model Publication No. 57-55330), a metal cylindrical support mount having an insulating ring inserted and fixed is penetrated and fixed to the inner wall of the equipment through a flange plate, and a non-conductive metal is attached to the support mount. An electrode device for cathodic protection is described in which a bolt is made through and fixed, and an insoluble anode in which a noble metal layer is formed on the surface of a cylindrical body made of a non-conductive metal is screwed into a protruding end of the inner wall side of the bolt. Yes.

また、特許文献4(特開2001−226788号公報)には、電極棒と保持体とを含み、電極棒は一端に固定端部を含み、固定端部は表面に雄ねじが形成されており、保持体は電気絶縁性を有し、一端に保持穴を含み、保持穴は内面に雌ねじが形成されており、電極棒及び保持体は、固定端部の雄ねじ及び保持穴の雌ねじの部分で互いにねじ結合している電気防蝕用電極装置が記載されている。   Patent Document 4 (Japanese Patent Application Laid-Open No. 2001-226788) includes an electrode rod and a holder, the electrode rod includes a fixed end at one end, and the fixed end has a male screw formed on the surface. The holding body has electrical insulation, includes a holding hole at one end, and the holding hole has an internal thread formed on the inner surface. The electrode rod and the holding body are connected to each other at the male screw portion of the fixed end and the internal thread portion of the holding hole. An electrocorrosive electrode device with screw connection is described.

これら特許文献3及び4に記載の電極装置によって、電極の交換が容易であったり、長期間しても機能の低下が少ないとされている。   According to the electrode devices described in Patent Documents 3 and 4, it is considered that the replacement of the electrodes is easy, and the deterioration of the function is small even for a long time.

しかし、これらの電極装置においても、電極の交換が容易に行うことは難しい。例えば、電極(不溶性陽極)の交換が容易であるとされている特許文献3の電極装置においても、ねじを外すのが容易ではなく、またボルトと不溶性陽極が共回りしたり、使用中に緩みや接触不良が生じたりして実用的ではなく、筒状体の陽極を用いるため強度的に問題がある。   However, even in these electrode devices, it is difficult to easily replace the electrodes. For example, in the electrode device of Patent Document 3 in which the replacement of the electrode (insoluble anode) is considered easy, it is not easy to remove the screw, and the bolt and the insoluble anode rotate together or loosen during use. In addition, there is a problem in strength because a cylindrical anode is used.

このように、従来においては、緩みや接触不良がなく安定して使用でき、また電極(体)の交換を簡便化し、かつ電極体そのものの長寿命化が達成された電気防食用電極体及び電極装置は得られていない。   Thus, in the past, the electrode body and electrode for anticorrosion that can be used stably without loosening or contact failure, and that the replacement of the electrode (body) has been simplified and the life of the electrode body itself has been extended. No device has been obtained.

特公昭42−23810号公報Japanese Patent Publication No.42-23810 特公平3−43354号公報Japanese Patent Publication No. 3-43354 実公昭57−55330号公報Japanese Utility Model Publication No.57-55330 特開2001−226788号公報JP 2001-226788 A

従って、本発明の目的は、緩みや接触不良がなく安定して使用でき、また電極体の交換が簡便化され、かつ電極体そのものの長寿命化が達成され、経済性及び環境性に優れた電気防食用電極体及び電極装置を提供することにある。   Therefore, the object of the present invention is to be used stably without any looseness or contact failure, to facilitate the replacement of the electrode body, and to achieve a long life of the electrode body itself, which is excellent in economic efficiency and environmental performance. An object of the present invention is to provide an electrode body for electrode protection and an electrode device.

本発明者らは、検討の結果、末端部にナットを設け、かつ先端部の断面を円弧状とした棒状の電気防食用電極体、並びに棒状の電極体と筒状の電極受体とを有し、両者を螺合してなり、螺合部分の電極体及び電極受体のそれぞれにナットを配置することにより、上記目的が達成し得ることを知見して本発明に至った。 As a result of the study, the present inventors have provided a rod-shaped electrode for anticorrosion with a nut at the end and an arc-shaped cross section at the tip, and a rod- shaped electrode and a cylindrical electrode receiver. Then, the inventors have found that the above object can be achieved by screwing the two together and arranging a nut on each of the electrode body and the electrode receiver at the threaded portion, and have reached the present invention.

すなわち、本発明は、チタンとその表面に設けられた貴金属被覆層とからなる棒状の電気防食用電極体であって、末端部にナットと筒状の電極受体先端部に形成された雄ネジと螺合するための内面に雌ネジが形成された保持穴とを有し、かつ該電極体先端部の断面が円弧状であり、該電極体先端部の貴金属被覆層の厚みが、他の部分の貴金属被覆層の厚みより厚いことを特徴とする電気防食用電極体を提供するものである。 That is, the present invention is a rod-shaped electrode for anticorrosion composed of titanium and a noble metal coating layer provided on the surface thereof, and a male screw formed at a distal end portion of a nut and a cylindrical electrode receiver. and a inner surface holding hole female screw is formed in the order to be screwed with, and Ri sectional arcuate der the electrode body distal end, the thickness of the noble metal coating layer electrode body tip, the other The electrode body for cathodic protection is characterized in that it is thicker than the thickness of the noble metal coating layer .

また、本発明は、チタンとその表面に設けられた貴金属被覆層とからなる棒状の電気防食用電極体であって、末端部にナットと筒状の電極受体先端部の保持穴に形成された雌ネジと螺合するための雄ネジとを有し、かつ該電極体先端部の断面が円弧状であり、該電極体先端部の貴金属被覆層の厚みが、他の部分の貴金属被覆層の厚みより厚いことを特徴とする電気防食用電極体を提供するものである。 The present invention also relates to a rod-shaped electrode for anticorrosion composed of titanium and a noble metal coating layer provided on the surface thereof, and is formed in a holding hole in a distal end portion of a nut and a cylindrical electrode receiver. had a male thread for the female thread is screwed, and electrode body Ri sectional arcuate der tip portion, the thickness of the noble metal coating layer of the electrode assembly tip, the noble metal coating of the other part An electrode body for cathodic protection, which is thicker than the thickness of the layer, is provided.

本発明に係る上記電気防食用電極体において、上記貴金属が白金であることが望ましい。 In the sacrificial electrode body according to the present invention, it is preferable upper Symbol noble metal is platinum.

本発明に係る上記電気防食用電極体において上記貴金属被覆層が上記チタンの表面全面に形成されていると共に、上記ナット表面に貴金属被覆層が形成されていることが好ましい。 In the electrode body for cathodic protection according to the present invention, the noble metal coating layer is preferably formed on the entire surface of the titanium, and the noble metal coating layer is preferably formed on the nut surface .

また、本発明は、棒状の電極体と筒状の電極受体とを有する電気防食用電極装置であって、該電極受体の先端部に設けられた雄ネジと該電極体の末端部の保持穴に形成された雌ネジとを螺合してなり、該電極受体の先端部と該電極体の末端部とにそれぞれナットが配置されていることを特徴とする電気防食用電極装置を提供するものである。 The present invention also relates to an electrode member for cathodic protection having a rod-shaped electrode body and a cylindrical electrode receiver, wherein a male screw provided at a tip portion of the electrode receiver and a terminal portion of the electrode body are provided. An electrode apparatus for anticorrosion, characterized in that a female screw formed in a holding hole is screwed together, and nuts are respectively arranged at the tip portion of the electrode receiver and the terminal portion of the electrode body. It is to provide.

また、本発明は、棒状の電極体と筒状の電極受体とを有する電気防食用電極装置であって、該電極受体の先端部の保持穴に形成された雌ネジと該電極体の末端部に設けられた雄ネジとを螺合してなり、該電極受体の先端部と該電極体の末端部とにそれぞれナットが配置されていることを特徴とする電気防食用電極装置を提供するものである。 The present invention also relates to an electrode member for cathodic protection having a rod-shaped electrode body and a cylindrical electrode receiver, the female screw formed in the holding hole at the tip of the electrode receiver and the electrode body An electrode apparatus for anticorrosion, characterized in that a male screw provided at a terminal portion is screwed, and nuts are respectively disposed at a tip portion of the electrode receiver and a terminal portion of the electrode body. It is to provide.

本発明に係る上記電気防食用電極装置において、上記電極受体の先端部に配置されたナットと上記電極体の末端部に配置されたナット間に座金が挿入されていることが望ましい。   In the electrode device for anticorrosion according to the present invention, it is desirable that a washer be inserted between a nut disposed at a tip portion of the electrode receiver and a nut disposed at a terminal portion of the electrode body.

本発明に係る上記電気防食用電極装置において、上記電極受体が共回り防止手段を備えることが望ましい。上記共回り防止手段は、上記電極受体を被覆する凸部を有する絶縁性樹脂とその外周を被覆し、凹部を有する支持金具とからなり、該凸部と該凹部を嵌合してなるものが好ましく用いられる。   In the above electrode protection device according to the present invention, it is desirable that the electrode receiver includes a co-rotation preventing means. The co-rotation preventing means is composed of an insulating resin having a convex portion covering the electrode receiver and a support metal fitting covering the outer periphery and having a concave portion, and is formed by fitting the convex portion and the concave portion. Is preferably used.

本発明に係る上記電気防食用電極装置において、上記電極体は、上述した本発明に係る電気防食用電極体が好ましく用いられる。   In the electrode device for anticorrosion according to the present invention, the electrode member for anticorrosion according to the present invention described above is preferably used as the electrode body.

本発明に係る電気防食用電極体は、先端部の断面が円弧状になっているため、貴金属被覆層の電流分布の偏りを軽減でき、また貴金属被覆層の剥離等の事態も回避できる。さらに、断面が円弧状の先端部の貴金属被覆層の厚みを他の部分の貴金属被覆層の厚みより厚くすることによって、電極寿命を延長することができる。しかも、電極受体との螺合部にナットを有することから、電極受体との緩みや接触不良を防止することができる。また、貴金属被覆層が消耗した電極体は、再度、貴金属を被覆することにより再利用できるので、産業廃棄物が大幅に減少すると共に経済的である。   The electrode body for cathodic protection according to the present invention has an arc-shaped cross section at the tip, so that it is possible to reduce the uneven current distribution of the noble metal coating layer, and to avoid situations such as peeling of the noble metal coating layer. Furthermore, the electrode life can be extended by making the thickness of the noble metal coating layer at the tip of the arc-shaped section thicker than the thickness of the other portion of the noble metal coating layer. And since it has a nut in the screwing part with an electrode receiver, the looseness and contact failure with an electrode receiver can be prevented. In addition, since the electrode body in which the noble metal coating layer is consumed can be reused by coating the noble metal again, industrial waste is greatly reduced and it is economical.

また、本発明に係る電気防食用電極装置は、電極体と電極受体との螺合部にそれぞれナットを有することから、電極体の交換が極めて容易となる。また、ナット間に座金が挿入されているので使用時の緩みや接触不良が一層防止される。また、電極受体に共回り防止手段を備えているので、電極受体が電極体と共回りすることがないので電極体の交換が一層容易となる。   Moreover, since the electrode apparatus for anticorrosion which concerns on this invention has a nut in the screwing part of an electrode body and an electrode receiver, respectively, replacement | exchange of an electrode body becomes very easy. Moreover, since a washer is inserted between the nuts, loosening and poor contact during use are further prevented. In addition, since the electrode receiver is provided with the co-rotation preventing means, the electrode receiver does not co-rotate with the electrode body, so that the electrode body can be replaced more easily.

以下、本発明を実施するための最良の形態について詳述する。
図1は、本発明に係る電気防食用電極装置1の一実施形態を示す概略断面図である。
Hereinafter, the best mode for carrying out the present invention will be described in detail.
FIG. 1 is a schematic cross-sectional view showing one embodiment of an electrode protection electrode device 1 according to the present invention.

図1において、本発明に係る電気防食用電極装置1は、棒状の電極体2と筒状の電極受体6とを有する。電極体2は、チタン3とその表面を被覆した貴金属被覆層4からなるものである。従来用いられている電極体は筒状が一般的であるが、機械的強度が不充分であるため、本発明では棒状の電極体2が用いられる。貴金属被覆層としては白金、ルテニウム、イリジウム、パラジウム、ロジウム、オスミウム、もしくはそれらの合金が用いられるが、白金が通常用いられる。また、電極受体6はチタン3と同様の材質からなり、チタン製等が一般的である。 In FIG. 1, the electrode apparatus 1 for cathodic protection according to the present invention has a rod-shaped electrode body 2 and a cylindrical electrode receiver 6. The electrode body 2 is composed of titanium 3 and a noble metal coating layer 4 covering its surface. Conventionally used electrode bodies are generally cylindrical, but since the mechanical strength is insufficient, a rod-shaped electrode body 2 is used in the present invention. As the noble metal coating layer, platinum, ruthenium, iridium, palladium, rhodium, osmium, or an alloy thereof is used, but platinum is usually used. The electrode receiver 6 is made of the same material as the titanium 3, and is typically made of titanium.

図2に示されるように、本発明に係る電気防食用電極体2は、先端部の断面が円弧状、すなわち棒状の電極体の先端部が丸目加工されている。従来の電極体のように角部を有する場合には、角部付近からより多くの電流が流れるので、角部近傍での貴金属被覆層の消耗が著しいため、剥離、脱落等の事態を招く、そこで本発明では、先端部の断面を円弧状としている。   As shown in FIG. 2, the electrode member 2 for anticorrosion according to the present invention has a circular cross section at the tip of the rod-like electrode body, ie, the cross section of the tip is arcuate. In the case of having a corner as in the conventional electrode body, more current flows from the vicinity of the corner, so the precious metal coating layer near the corner is significantly consumed, leading to situations such as peeling and dropping. Therefore, in the present invention, the cross-section of the tip is arcuate.

貴金属被覆層4は、破壊電圧等を考慮してチタン露出し、チタンの溶出を防ぐために、チタンの表面全面に設けられると共に、ナット表面にも貴金属被覆層がに設けられることが望ましい。 Noble metal coating layer 4, the titanium is exposed in view of the breakdown voltage or the like, in order to prevent dissolution of titanium is provided in an entire surface of the titanium, to the nut surface provided on the noble metal coating layer Rukoto is desirable.

また、図2に示されるように、本発明に係る電極体の先端部の貴金属被覆層の厚みは、他の貴金属被覆層の厚みよりも厚くなっていることが必要である。これは先端部の消耗が他の部分の消耗の2倍程度あるからであり、先端部の貴金属被覆層の厚みを他の貴金属被覆層の厚みの2〜3倍とすることが望ましい。先端部の貴金属被覆層の厚みは10〜15μm、他の部分の貴金属被覆層の厚みは3〜7μmとするのが望ましい。 Further, as shown in FIG. 2, the thickness of the noble metal coating layer 4 at the tip of the electrode body according to the present invention needs to be thicker than the thicknesses of the other noble metal coating layers 4 . This is because the consumption of the tip portion is about twice that of the other portion, and the thickness of the noble metal coating layer at the tip portion is desirably 2 to 3 times the thickness of the other noble metal coating layer. The thickness of the noble metal coating layer at the tip is preferably 10 to 15 μm, and the thickness of the noble metal coating layer at other portions is preferably 3 to 7 μm.

図1に示されるように、本発明に係る棒状の電気防食用電極体2の末端部には、電極体側ナット5を有し、また筒状の電極受体先端部に形成された雄ネジと螺合するための内面に雌ネジが形成された保持穴(図示せず)を有している。上記電極体側ナットを設けるのは、後述するように電極受体から電極体の取り外しを容易にするためである。なお、図1は、筒状の電極受体先端部に形成された雄ネジと螺合するための内面に雌ネジが形成された保持穴を設けたものを示しているが、本発明に係る電気防食用電極体は、逆に筒状の電極受体先端部の保持穴に形成された雌ネジと螺合するための雄ネジを形成てもよい。 As shown in FIG. 1, a rod-shaped electrode member 2 for electrode protection according to the present invention has an electrode body-side nut 5 at its end, and a male screw formed at the tip of a cylindrical electrode receiver; It has a holding hole (not shown) in which an internal thread is formed on the inner surface for screwing. The reason for providing the electrode body side nut is to facilitate removal of the electrode body from the electrode receiver as will be described later. FIG. 1 shows an example in which a holding hole in which a female screw is formed is provided on the inner surface for screwing with a male screw formed at the distal end portion of a cylindrical electrode receiver. On the contrary, the electrode member for cathodic protection may be formed with a male screw for screwing with a female screw formed in the holding hole at the tip of the cylindrical electrode receiver.

本発明に係る電気防食用電極装置1の棒状の電極体2と筒状の電極受体6の螺合部の斜視図を図3に示し、図1と共に説明する。電極体2の末端部に形成された雌ネジが形成された保持穴(図示せず)に電極受体6の先端部に設けられた雄ネジ8を螺合する。電極体2には電極体側ナット5が電極受体6には電極受体側ナット7がそれぞれ配置され、電極体の交換を容易にしている。なお、図3は、電極体2に雌ネジ、電極受体6に雄ネジを形成したものを示しているが、本発明に係る電気防食用電極装置は、電極体に雄ネジ、電極受体に雌ネジを形成してもよい。 FIG. 3 shows a perspective view of a threaded portion of the rod-shaped electrode body 2 and the cylindrical electrode receiver 6 of the electrode protection electrode device 1 according to the present invention, which will be described together with FIG. A male screw 8 provided at the tip of the electrode receiver 6 is screwed into a holding hole (not shown) formed with a female screw formed at the end of the electrode body 2. An electrode body side nut 5 is disposed on the electrode body 2 and an electrode body side nut 7 is disposed on the electrode body 6 to facilitate replacement of the electrode body. FIG. 3 shows the electrode body 2 having a female screw and the electrode receiver 6 having a male screw. However, the electrode apparatus for cathodic protection according to the present invention has a male screw and an electrode receiver. An internal thread may be formed on the surface.

また、電極体側ナット5と電極受体側ナット7の間には、座金9,10が挿入され、電極装置使用時の電極体1と電極受体6の緩みや接触不良を防止している。なお、図1及び3において、11は共回り防止手段、12は絶縁性樹脂、13は絶縁性スリーブ、14は絶縁体、15は支持金具、16は固定ボルト及び17はケーブル接続端子であり、絶縁性樹脂12はエポキシ系接着性樹脂等からなり、絶縁性スリーブ13はポリ塩化ビニル等からなる。   Also, washers 9 and 10 are inserted between the electrode body side nut 5 and the electrode receiver side nut 7 to prevent looseness and poor contact of the electrode body 1 and the electrode receiver 6 when the electrode device is used. 1 and 3, 11 is a co-rotation prevention means, 12 is an insulating resin, 13 is an insulating sleeve, 14 is an insulator, 15 is a support metal fitting, 16 is a fixing bolt, and 17 is a cable connection terminal. The insulating resin 12 is made of an epoxy adhesive resin or the like, and the insulating sleeve 13 is made of polyvinyl chloride or the like.

図4は、図1のA−A部分の断面図であり、本発明に係る電気防食用電極装置に用いられる共回り防止手段11を示す図である。図1及び図4に示されるように、電極受体6は絶縁性樹脂12と絶縁性スリーブ13で被覆されいる。共回り防止手段11は、さらにその外周を被覆する凸部を有する絶縁性樹脂12とその外周を被覆し、凹部を有する支持金具15とからなり、該凸部と該凹部を嵌合してなるものである。この共回り防止手段11は、電極受体6から電極体2を外し、電極体2を交換する際に、電極受体6の共回りを防止している。 FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 and shows the co-rotation preventing means 11 used in the electrode protection electrode device according to the present invention. As shown in FIGS. 1 and 4, the electrode receptacle 6 is covered with the insulating resin 12 and the insulating sleeve 13. The co-rotation preventing means 11 further includes an insulating resin 12 having a convex portion covering the outer periphery thereof and a support fitting 15 having a concave portion and covering the outer periphery, and is formed by fitting the convex portion and the concave portion. Is. The co-rotation preventing means 11 prevents co-rotation of the electrode receiver 6 when the electrode body 2 is removed from the electrode receiver 6 and the electrode body 2 is replaced.

本発明に係る電気防食用電極体及び電極装置により、電極体の交換が簡便化され、使用中にも緩みや接触不良がなく安定しており、また電極体そのものの長寿命化が達成され、経済性及び環境性に優れる。従って、本発明に係る電気防食用電極体及び電極装置は、復水器、熱交換器等の金属製機器類の電気防食用電極体及び電極装置として好適に使用される。   The electrode body and the electrode device for anticorrosion according to the present invention facilitate the replacement of the electrode body, are stable without loosening or contact failure during use, and achieve a long life of the electrode body itself, Excellent economy and environment. Therefore, the electrode member for electrode protection and the electrode device according to the present invention are suitably used as an electrode member for electrode protection and an electrode device for metal equipment such as a condenser and a heat exchanger.

図1は、本発明に係る電気防食用電極装置の一実施形態を示す概略断面図である。FIG. 1 is a schematic cross-sectional view showing an embodiment of an electrode protection electrode device according to the present invention. 図2は、本発明に係る電気防食用電極体の先端部の断面図である。FIG. 2 is a cross-sectional view of the tip of the electrode member for cathodic protection according to the present invention. 図3は、本発明に係る電気防食用電極装置の電極体と電極受体との螺合部の斜視図である。FIG. 3 is a perspective view of a threaded portion between an electrode body and an electrode receiver of the electrode protection electrode device according to the present invention. 図4は、図1のA−A部分の断面図であり、本発明に係る電気防食用電極装置に用いられる共回り防止手段を示す図である。FIG. 4 is a cross-sectional view taken along the line AA in FIG.

1:電気防食用電極装置
2:電極体
3:チタン
4:貴金属被覆層(白金被覆層)
5:電極体側ナット
6:電極受体
7:電極受体側ナット
8:雄ネジ
9:座金1
10:座金2
11:共回防止手段
12:絶縁性樹脂
13:絶縁スリーブ
14:絶縁体
15:支持金具
16:固定ナット
17:ケーブル接続端子
1: Electrocorrosion electrode device 2: Electrode body 3: Titanium 4: Noble metal coating layer (platinum coating layer)
5: Electrode body side nut 6: Electrode body 7: Electrode body side nut 8: Male screw 9: Washer 1
10: Washer 2
11: Co-rotation prevention means 12: Insulating resin 13: Insulating sleeve 14: Insulator 15: Support metal fitting 16: Fixing nut 17: Cable connection terminal

Claims (10)

チタンとその表面に設けられた貴金属被覆層とからなる棒状の電気防食用電極体であって、末端部にナットと筒状の電極受体先端部に形成された雄ネジと螺合するための内面に雌ネジが形成された保持穴とを有し、かつ該電極体先端部の断面が円弧状であり、該電極体先端部の貴金属被覆層の厚みが、他の部分の貴金属被覆層の厚みより厚いことを特徴とする電気防食用電極体。 A rod-shaped electrode for anticorrosion made of titanium and a noble metal coating layer provided on the surface thereof, for screwing with a nut at the end and a male screw formed at the tip of a cylindrical electrode receiver and a holding hole which the female screw on the inner surface is formed, and electrode body Ri sectional arcuate der tip portion, the thickness of the noble metal coating layer of the electrode assembly tip, the noble metal coating layer of the other part An electrode body for cathodic protection characterized by being thicker than the thickness . チタンとその表面に設けられた貴金属被覆層とからなる棒状の電気防食用電極体であって、末端部にナットと筒状の電極受体先端部の保持穴に形成された雌ネジと螺合するための雄ネジとを有し、かつ該電極体先端部の断面が円弧状であり、該電極体先端部の貴金属被覆層の厚みが、他の部分の貴金属被覆層の厚みより厚いことを特徴とする電気防食用電極体。 A rod-shaped electrode for anticorrosion made of titanium and a noble metal coating layer provided on the surface thereof, and screwed with a nut and a female screw formed in a holding hole at the tip of a cylindrical electrode receiver at the end. and a male screw to, and Ri sectional arcuate der the electrode body distal end, the thickness of the noble metal coating layer of the electrode assembly tip, thicker than the thickness of the noble metal coating layer other parts An electrode body for cathodic protection characterized by the above. 記貴金属が白金である請求項1又は2記載の電気防食用電極体。 Sacrificial electrode body according to claim 1 or 2 above Symbol noble metal is platinum. 上記貴金属被覆層が上記チタンの表面全面に形成されていると共に、上記ナット表面に貴金属被覆層が形成されている請求項1、2又は3記載の電気防食用電極体。 4. The electrode member for cathodic protection according to claim 1 , wherein the noble metal coating layer is formed on the entire surface of the titanium and a noble metal coating layer is formed on the nut surface . 棒状の電極体と筒状の電極受体とを有する電気防食用電極装置であって、該電極受体の先端部に設けられた雄ネジと該電極体の末端部の保持穴に形成された雌ネジとを螺合してなり、該電極受体の先端部と該電極体の末端部とにそれぞれナットが配置されていることを特徴とする電気防食用電極装置。 An electrode apparatus for cathodic protection having a rod-shaped electrode body and a cylindrical electrode receiver, formed on a male screw provided at a tip portion of the electrode receiver and a holding hole at a terminal portion of the electrode body An electrode member for cathodic protection, comprising a female screw and a nut disposed at each of a tip portion of the electrode receiver and a terminal portion of the electrode body. 棒状の電極体と筒状の電極受体とを有する電気防食用電極装置であって、該電極受体の先端部の保持穴に形成された雌ネジと該電極体の末端部に設けられた雄ネジとを螺合してなり、該電極受体の先端部と該電極体の末端部とにそれぞれナットが配置されていることを特徴とする電気防食用電極装置。 An electrode device for cathodic protection having a rod-shaped electrode body and a cylindrical electrode receiver, the female screw formed in a holding hole at the tip of the electrode receiver, and provided at the end of the electrode body An electrode apparatus for cathodic protection comprising a male screw and a nut disposed at each of a tip portion of the electrode receiver and a terminal portion of the electrode body. 上記電極受体の先端部に配置されたナットと上記電極体の末端部に配置されたナット間に座金が挿入されている請求項又は6に記載の電気防食用電極装置。 The electrode device for cathodic protection according to claim 5 or 6, wherein a washer is inserted between a nut disposed at a tip portion of the electrode receiver and a nut disposed at a terminal portion of the electrode body. 上記電極受体が共回り防止手段を備える請求項又は7に記載の電気防食用電極装置。 The electrode device for anticorrosion according to claim 5 , 6 or 7, wherein the electrode receiver includes a co-rotation preventing means. 上記共回り防止手段が、上記電極受体を被覆する凸部を有する絶縁性樹脂とその外周を被覆し、凹部を有する支持金具とからなり、該凸部と該凹部を嵌合してなるものである請求項8に記載の電気防食用電極装置。 The co-rotation preventing means comprises an insulating resin having a convex portion covering the electrode receiver and a support fitting having a concave portion covering the outer periphery, and the convex portion and the concave portion are fitted. The electrode device for cathodic protection according to claim 8 . 上記電極体が、請求項1〜のいずれかに記載の電極体である請求項のいずれかに記載の電気防食用電極装置。 The electrode apparatus for cathodic protection according to any one of claims 5 to 9 , wherein the electrode body is the electrode body according to any one of claims 1 to 4 .
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