JP2001281195A - Corrosion detection apparatus - Google Patents
Corrosion detection apparatusInfo
- Publication number
- JP2001281195A JP2001281195A JP2000090924A JP2000090924A JP2001281195A JP 2001281195 A JP2001281195 A JP 2001281195A JP 2000090924 A JP2000090924 A JP 2000090924A JP 2000090924 A JP2000090924 A JP 2000090924A JP 2001281195 A JP2001281195 A JP 2001281195A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- copper
- corrosion
- water
- test
- 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.)
- Pending
Links
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Prevention Of Electric Corrosion (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は腐食検知装置に関わ
り、特に冷媒として使用する水が銅製配管に対して腐食
性であるか否かを検知する腐食検知装置に関するもので
ある。The present invention relates to a corrosion detecting device, and more particularly to a corrosion detecting device for detecting whether water used as a refrigerant is corrosive to copper piping.
【０００２】[0002]
【従来の技術】銅は、優れた耐食性を有し、かつ電気・
熱伝導性や加工性に優れているため、例えば冷凍空調用
配管や給水給湯用配管などの配管材料として広く使用さ
れている。このような用途に使われる耐食性に優れた銅
管も、冷媒として使用する水の種類によっては時として
腐食することがある。特に、局部腐食が発生すると、短
期間に腐食が進行して冷媒が漏れるなどの不具合が生じ
る。このような不具合を生じさせる局部腐食の１つに、
孔食がある。孔食は、銅管に水が流れている場合に、例
えば局部的に盛り上がった緑青（塩基性炭酸銅、塩基性
硫酸銅）の下部に発生する。腐食防食データブック（腐
食防食協会編）のｐ１２９〜ｐ１３０には、開放系蓄熱
槽を用いた空調システムや給湯システムに用いられる銅
管で発生した例が示されている。BACKGROUND OF THE INVENTION Copper has excellent corrosion resistance,
Because of its excellent heat conductivity and workability, it is widely used as a piping material for, for example, refrigeration / air-conditioning piping and hot-water / hot-water piping. Copper pipes having excellent corrosion resistance used in such applications sometimes corrode depending on the type of water used as a refrigerant. In particular, when local corrosion occurs, problems such as corrosion progressing in a short period of time and leakage of the refrigerant occur. One of the local corrosion that causes such a problem is,
There is pitting. Pitting occurs when, for example, water flows through a copper tube, for example, below the locally raised patina (basic copper carbonate, basic copper sulfate). Corrosion and corrosion prevention data book (Corrosion and Corrosion Protection Association), pages 129 to p130, show examples of occurrence in copper pipes used in air conditioning systems and hot water supply systems using open thermal storage tanks.
【０００３】このような孔食に代表される銅の腐食を未
然に防止するために、水中における銅の自然電位をモニ
タリングする方法が提案されている。例えば特開平５―
０９８４７６号公報には、水中における銅の自然電位を
連続的または間欠的にモニタリングし、自然電位が孔食
電位を超えないように脱酸素剤やキレート剤などの腐食
抑制剤を水に添加する方法が開示されている。ここで、
孔食電位は金属に孔食が生じ始める金属の自然電位のこ
とで、金属の種類、金属表面の幾何学的形状、接触して
いる水の性質や温度などに左右される。そこで腐食抑制
剤を使うにしても、予め、この孔食電位を実験的に求め
ておく必要がある。図４は特開平５―０９８４７６号公
報に記載された銅管の自然電位をモニタリングする試験
装置で、リン脱酸銅製の熱交換器銅コイルに、蓄熱冷水
が流れる状況が想定されている。同図において、９はリ
ン脱酸銅からなり、冷水（１２℃）の戻り配管１３に並
列に接続されている銅管、１０はＫＣｌ飽和銀・塩化銀
からなる照合電極、１１は電位差計、１２は銅管内を流
れる水の流速を調整するバルブ、１４は蓄熱冷水槽であ
る。なお以下ではＫＣｌ飽和銀・塩化銀照合電極をＡｇ
／ＡｇＣｌと表記する。この試験装置ではバルブ１２を
調節して一定の流速で冷水を銅管９に流し、蓄熱冷水槽
１４に浸漬された照合電極１０に対する銅管９の自然電
位を電位差計１１を用いて測定する。得られた結果を図
５に示す。いずれの流速（０．３，１．０，１．５ｍ／
秒）においても、自然電位は１９０ｍＶ以上に達し、孔
食が生じていた。このことから孔食電位を１９０ｍＶと
求めることができる。[0003] In order to prevent the corrosion of copper typified by such pitting corrosion, a method of monitoring the natural potential of copper in water has been proposed. For example, JP-A-5-
No. 098476 discloses a method of monitoring the natural potential of copper in water continuously or intermittently and adding a corrosion inhibitor such as a deoxidizer or a chelating agent to water so that the natural potential does not exceed the pitting potential. Is disclosed. here,
Pitting corrosion potential is the spontaneous potential of a metal at which pitting begins to occur on the metal and depends on the type of metal, the geometric shape of the metal surface, the nature and temperature of the water in contact, and the like. Therefore, even when a corrosion inhibitor is used, it is necessary to experimentally determine this pitting potential in advance. FIG. 4 shows a test device for monitoring the natural potential of a copper tube described in Japanese Patent Application Laid-Open No. Hei 5-098476. It is assumed that cold storage water flows through a heat exchanger copper coil made of phosphorus deoxidized copper. In the drawing, 9 is a copper tube made of phosphorous deoxidized copper and connected in parallel to a return pipe 13 of cold water (12 ° C.), 10 is a reference electrode made of KCl saturated silver / silver chloride, 11 is a potentiometer, Numeral 12 denotes a valve for adjusting the flow rate of water flowing in the copper tube, and numeral 14 denotes a heat storage cold water tank. In the following, the KCl saturated silver / silver chloride reference electrode is Ag.
/ AgCl. In this test apparatus, the valve 12 is adjusted so that cold water flows through the copper tube 9 at a constant flow rate, and the natural potential of the copper tube 9 with respect to the reference electrode 10 immersed in the heat storage cold water tank 14 is measured using the potentiometer 11. The results obtained are shown in FIG. Any flow velocity (0.3, 1.0, 1.5 m /
Second), the spontaneous potential reached 190 mV or more, and pitting occurred. From this, the pitting potential can be determined to be 190 mV.
【０００４】[0004]
【発明が解決しようとする課題】さて、このようにして
孔食電位が求まれば、自然電位を連続的または間欠的に
モニタリングし、ヒドラジンなどの腐食抑制剤を自然電
位が孔食電位を超えないように添加する、あるいはモニ
タリングしないのであれば予め腐食抑制剤を少し過剰に
加えるなどの処置が取れる。とはいえ、上記した方法に
よれば孔食電位を求めるのに、数十日もの試験期間を要
している。これに対し孔食電位を求めることの出来ない
水、すなわち腐食性のない水であることが判明すれば、
特に対処はいらないが、それを判明するのに同じ試験を
必要とするのでやはり数十日、あるいはそれ以上の試験
期間を要する。また腐食性のない水であっても、予め腐
食抑制剤を添加することは可能であるが、腐食抑制剤が
かえって配管を損傷することもありうる。いずれにせ
よ、冷媒として使用する水が銅製配管に対して腐食性が
あるか否かを、短時間に判断し、検知できる方法が望ま
れていた。そこで本発明者は銅製試験片に電流を流すと
腐食が促進されることに着目し、試験片の腐食状態や電
流量の関係に関し鋭意研究を重ねた結果、水の腐食性を
簡便に判別する方法を発見するにいたり、本発明に到達
した。Once the pitting potential is determined in this way, the spontaneous potential is monitored continuously or intermittently, and the corrosion inhibitor such as hydrazine is removed from the pitting potential. If it is not added, or if the monitoring is not performed, measures such as adding a little excess of a corrosion inhibitor in advance can be taken. However, according to the above-described method, it takes several tens of days to determine the pitting potential. On the other hand, if it is found that the pitting potential cannot be determined, that is, the water is not corrosive,
Although no special measures are required, the same test is required to find out, so that a test period of several tens of days or more is required. Although it is possible to add a corrosion inhibitor in advance even with non-corrosive water, the corrosion inhibitor may instead damage the piping. In any case, there has been a demand for a method capable of determining in a short time whether or not water used as a refrigerant is corrosive to a copper pipe and detecting it. The inventor of the present invention focused on the fact that corrosion is promoted when an electric current is applied to a copper test piece, and as a result of intensive research on the relationship between the corrosion state of the test piece and the amount of current, the corrosiveness of water is easily determined. The discovery of the method led to the present invention.
【０００５】[0005]
【課題を解決するための手段】本発明に関わる腐食検知
装置は、銅を主成分とする材料からなる試験極に一定電
流を流して腐食を加速する。また本発明に関わる腐食検
知装置は、１０μＡ／cm2以下の微少な一定電流を流
す。また本発明に関わる腐食検知装置は、ステンレス
鋼、白金、銅、カーボンなどを対極として用いることが
出来る。また本発明に関わる腐食検知装置は、ステンレ
ス鋼、白金、銅、カーボン、Ａｇ／ＡｇＣｌなどを基準
電極として用いることが出来る。また本発明に関わる腐
食検知装置は対極が基準電極を兼ねることが出来る。The corrosion detecting device according to the present invention accelerates corrosion by applying a constant current to a test electrode made of a material containing copper as a main component. Further, the corrosion detecting device according to the present invention allows a minute constant current of 10 μA / cm 2 or less to flow. The corrosion detection device according to the present invention can use stainless steel, platinum, copper, carbon, or the like as a counter electrode. The corrosion detection device according to the present invention can use stainless steel, platinum, copper, carbon, Ag / AgCl, or the like as a reference electrode. Further, in the corrosion detection device according to the present invention, the counter electrode can also serve as the reference electrode.
【０００６】[0006]
【発明の実施の形態】次に図面に示す実施の形態に基づ
いて本発明を詳細に説明する。図１において１は銅配管
などに使用される材料と同一の材料からなる試験極、２
は試験極１と向かい合って配置され、電気的に接続され
ている対極、３は孔食電位の測定において電位の基準と
する基準電極、４は試験極１と対局２の間に一定電流を
供給する電源、５は試験極１と基準電極３の間の電位差
を測定する電位差計、６は腐食性を有するか否かを調べ
るべき試験水、７は試験水６を貯えておく容器である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail based on an embodiment shown in the drawings. In FIG. 1, reference numeral 1 denotes a test electrode made of the same material as a material used for a copper pipe or the like;
Is a counter electrode that is disposed opposite to the test electrode 1 and is electrically connected. 3 is a reference electrode that is used as a reference of the potential in measuring the pitting potential. 4 is a constant current between the test electrode 1 and the game station 2. A power supply 5, a potentiometer 5 for measuring a potential difference between the test electrode 1 and the reference electrode 3, a test water 6 for examining whether or not it has corrosiveness, and a container 7 for storing the test water 6.
【０００７】試験極１に適用可能な材料には、純銅、キ
ュプロニッケル（Ｃｕ、１０〜３０％Ｎｉ、０．５〜２
％Ｆｅ、１％Ｍｎ）、黄銅（Ｃｕ−Ｚｎ）、すず青銅
（Ｃｕ−Ｓｎ）等があり、銅を主成分とする金属であれ
ば特に限定されるものではない。なお本発明では特に断
りがない限り銅といえばこれらの銅全般を指す。試験極
１は、板状の他、管状、棒状、線状のものを適用できる
ので、特に形状に制限はないが、精度のよい測定にはあ
る程度の広さが必要である。Materials applicable to the test electrode 1 include pure copper, cupronickel (Cu, 10 to 30% Ni, 0.5 to 2%).
% Fe, 1% Mn), brass (Cu-Zn), tin bronze (Cu-Sn), etc., and are not particularly limited as long as they are metals containing copper as a main component. In the present invention, copper refers to all of these copper unless otherwise specified. The test electrode 1 can be in the form of a tube, rod, or wire, in addition to a plate. Therefore, the shape of the test electrode 1 is not particularly limited, but a certain size is required for accurate measurement.
【０００８】対極２はステンレス鋼、白金、銅、カーボ
ンなどの耐食性が高い導電材の中から適宜選ぶことが出
来る。対極も、板状の他、管状、棒状、線状のものを適
用できるので、特に形状に制限はない。The counter electrode 2 can be appropriately selected from conductive materials having high corrosion resistance, such as stainless steel, platinum, copper, and carbon. The counter electrode may be in the form of a tube, rod, or wire in addition to a plate, and thus the shape is not particularly limited.
【０００９】基準電極３はステンレス鋼、白金、銅、カ
ーボン、Ａｇ／ＡｇＣｌなどの中から適宜選んで用いる
ことが出来る。基準電極も、板状の他、管状、棒状、線
状のものを適用できるので、特に形状に制限はない。こ
れらの材料はすべて耐食性が高いのでメンテナンスがほ
とんど不要である。基準電極にＡｇ／ＡｇＣｌを用いる
場合には、例えば東亜電波工業(株)製のＨＳ−２０５Ｃ
などの市販されているガラス電極を用いればよい。なお
対極は、図３の８で示されたように基準電極を兼用する
ことが出来る。こうすれば構成が簡素になる。この場
合、ステンレス鋼、白金、銅、カーボンなどが適用でき
る。The reference electrode 3 can be appropriately selected from stainless steel, platinum, copper, carbon, Ag / AgCl and the like. The reference electrode may be in the form of a tube, a rod, or a line, in addition to a plate, and thus the shape is not particularly limited. All of these materials have high corrosion resistance and require little maintenance. When Ag / AgCl is used for the reference electrode, for example, HS-205C manufactured by Toa Denpa Kogyo KK
A commercially available glass electrode such as the above may be used. The counter electrode can also serve as a reference electrode as shown at 8 in FIG. This simplifies the configuration. In this case, stainless steel, platinum, copper, carbon, or the like can be used.
【００１０】次に、試験極１と対極２の間に流す電流の
量について説明する。電流は腐食を促進させるために流
すもので、一定電流を流すことが重要である。またその
量は１０μＡ／cm2以下が適切である。これ以上の電流
を流すと、自然浸漬状態で孔食が発生するか否かに関わ
らず、試験極全面に腐食が均一に起こる。すなわち、１
０μＡ／cm2を越える電流を流すと、自然浸漬とは異な
る腐食状態が生じるので、試験極に対する水の腐食性を
正しく評価できない。これに対し１０μＡ／cm2以下で
あれば、自然状態における銅の腐食状態を忠実に加速で
きる。一方、電流を小さくすると、水の腐食性を評価す
るのに要する時間が長くなる。以上のことを勘案する
と、流す電流は０．５〜１０μＡ／cm2が好ましい。Next, the amount of current flowing between the test electrode 1 and the counter electrode 2 will be described. The current is applied to promote corrosion, and it is important to supply a constant current. It is appropriate that the amount is 10 μA / cm 2 or less. When a current greater than this is applied, corrosion occurs uniformly over the entire surface of the test electrode regardless of whether or not pitting occurs in the naturally immersed state. That is, 1
When a current exceeding 0 μA / cm 2 is passed, a corrosion state different from that of natural immersion occurs, so that the corrosiveness of water to the test electrode cannot be evaluated correctly. On the other hand, if it is 10 μA / cm 2 or less, the corrosion state of copper in the natural state can be faithfully accelerated. On the other hand, when the current is reduced, the time required to evaluate the corrosiveness of water increases. In consideration of the above, it is preferable that the flowing current is 0.5 to 10 μA / cm 2 .
【００１１】なお一定電流を流した場合、水が腐食性の
場合には試験極と基準電極との電位差は、小さくなる傾
向にあるが、水が腐食性でない場合には一定または増加
する傾向にある。また水が腐食性である場合には試験極
表面に斑点状の緑青が発生するが、腐食性でない場合に
は試験極表面に斑点状の緑青が発生しない。When a constant current is passed, the potential difference between the test electrode and the reference electrode tends to be small when water is corrosive, but tends to be constant or increased when water is not corrosive. is there. When the water is corrosive, spot-like patina is generated on the test electrode surface, but when the water is not corrosive, the spot-shaped patina is not generated on the test electrode surface.
【００１２】このように本発明では試験極と対極の間に
１０μＡ／cm2以下の微少な一定電流を流した時の、試
験極の表面状態の変化や電位差の経時変化を検知する。
本発明によれば自然状態で起こる腐食を、形態を損なう
ことなく忠実に加速するので、水の腐食性を迅速に判断
できる。その結果、孔食を発生させる水か否かを冷凍空
調用配管や給水給湯用配管に使用する以前に的確に判断
し、ＣａＣＯ3などのアルカリを添加するあるいは脱酸
素処理を施すなどの適切な腐食対策を実施することがで
きる。また腐食性水に腐食防止対策を施すことが出来な
い場合は該腐食性水に最適な銅合金を選択するなどの対
応も短期間で可能になる。As described above, in the present invention, when a minute constant current of 10 μA / cm 2 or less flows between the test electrode and the counter electrode, a change in the surface state of the test electrode and a change with time in the potential difference are detected.
According to the present invention, corrosion occurring in a natural state is faithfully accelerated without impairing the form, so that the corrosiveness of water can be quickly judged. As a result, it is accurately determined whether or not the water causes pitting corrosion before being used for the refrigeration / air-conditioning pipe or the water supply / hot water supply pipe, and an appropriate method such as adding an alkali such as CaCO 3 or performing a deoxygenation treatment is performed. Corrosion measures can be taken. If it is not possible to take measures to prevent corrosion of the corrosive water, it is possible to take measures such as selecting an optimal copper alloy for the corrosive water in a short time.
【００１３】[0013]
【実施例】試験極、対極、基準電極に純銅製パイプ（φ
３×３０，１ｔ）、白金、Ａｇ／ＡｇＣｌをそれぞれ用
いて腐食性試験を行った。装置のコンパクト化を図るた
めに３個の電極は樹脂に埋め込んだが、必要部分は水と
接触するように開口されている。試験水には孔食が発生
した試験水１と孔食が発生していない試験水２を用い
た。両者の水質は図６のとおりである。試験極と対極の
間には５μＡ／cm2の一定電流を流した。試験極の表面
状態の変化を調べると、孔食が発生した試験水１では試
験極表面に斑点状の緑青が発生したが、孔食が発生して
いない試験水２では斑点状の緑青は発生しなかった。図
２は試験極の電位の経時変化を示す。孔食が発生した試
験水１（黒塗り四角で表示）では２０時間を越えてから
電位はほぼ一定または減少傾向にあったが、孔食が発生
していない試験水２（黒塗り丸で表示）では２０時間を
越えてから電位は上昇傾向にあった。以上のように水が
腐食性であるか否かを、１０μＡ／cm2以下の微少な一
定電流を流したときの試験極表面の状態変化や試験極と
基準電極との電位差の経時変化を調べることによって短
期間に判断できる。[Example] Pure copper pipe (φ
(3 × 30, 1 t), platinum, and Ag / AgCl were used to conduct a corrosion test. The three electrodes are embedded in resin to reduce the size of the device, but the necessary parts are opened to make contact with water. As test water, test water 1 in which pitting occurred and test water 2 in which pitting did not occur were used. The water quality of both is as shown in FIG. A constant current of 5 μA / cm 2 was passed between the test electrode and the counter electrode. When examining the change in the surface condition of the test electrode, a spot-like patina appeared on the test electrode surface in the test water 1 where pitting occurred, but a spot-like patina occurred in the test water 2 where no pitting occurred. Did not. FIG. 2 shows the change over time in the potential of the test electrode. In test water 1 in which pitting occurred (indicated by black squares), the potential was almost constant or tended to decrease after more than 20 hours, but test water 2 in which no pitting occurred (indicated by black circles) In ()), the electric potential tended to increase after more than 20 hours. As described above, whether or not water is corrosive is examined by examining the change in the surface state of the test electrode when a minute constant current of 10 μA / cm 2 or less is passed and the change with time in the potential difference between the test electrode and the reference electrode. You can judge in a short time.
【００１４】[0014]
【発明の効果】本発明によれば、試験極と対極の間に一
定電流を流して、試験極の表面状態の変化や試験極と基
準電極との電位差の経時変化を調べるので検査に要する
時間を短縮できる。また本発明によれば、試験極に流す
定電流の値は１０μＡ／cm2以下であるため、自然浸漬
状態で発生する銅の腐食を忠実に加速する。また本発明
によれば、対局にステンレス鋼、白金、銅、またはカー
ボンを用いることが出来るので耐久性に優れている。ま
た本発明によれば、基準電極にステンレス鋼、白金、
銅、カーボン、またはＡｇ／ＡｇＣｌを用いることが出
来るので、基準電極のメンテナンスがほとんど不要であ
る。また本発明によれば、基準電極を対局が併用できる
ので構成を簡素化できる。According to the present invention, a constant current is applied between the test electrode and the counter electrode to check the change in the surface state of the test electrode and the change with time in the potential difference between the test electrode and the reference electrode. Can be shortened. Further, according to the present invention, since the value of the constant current flowing through the test electrode is 10 μA / cm 2 or less, the corrosion of copper generated in the naturally immersed state is faithfully accelerated. Further, according to the present invention, stainless steel, platinum, copper, or carbon can be used for the game, so that the durability is excellent. Further, according to the present invention, stainless steel, platinum,
Since copper, carbon, or Ag / AgCl can be used, maintenance of the reference electrode is almost unnecessary. Further, according to the present invention, the game can be used in combination with the reference electrode, so that the configuration can be simplified.
【図１】 本発明に係る銅の腐食検知装置を説明する図
である。FIG. 1 is a diagram illustrating a copper corrosion detection device according to the present invention.
【図２】 本発明の実施例における銅の電位の経時変化
を示す図である。FIG. 2 is a diagram showing a change over time in the potential of copper in an example of the present invention.
【図３】 本発明に係る他の銅の腐食検知装置を説明す
る図である。FIG. 3 is a diagram illustrating another copper corrosion detection device according to the present invention.
【図４】 特開平５―０９８４７６号公報に記載されて
いる試験装置を示す図である。FIG. 4 is a diagram showing a test apparatus described in Japanese Patent Application Laid-Open No. Hei 5-098476.
【図５】 特開平５―０９８４７６号公報に記載されて
いる自然電位の経時変化を示す図である。FIG. 5 is a diagram showing a change with time of a spontaneous potential described in JP-A-5-098476.
【図６】 腐食試験に使用した試験水１と２の水質を表
す図である。FIG. 6 is a diagram showing the water quality of test waters 1 and 2 used for a corrosion test.
１ 試験極、２ 対極、３ 基準電極、４ 電源、５
電位差計、６ 試験水、７ 容器、８ 基準電極併用の
対極、９ 銅管、１０ 照合電極、１１ 電位差計、１
２ バルブ、１３ 冷水戻り配管、１４ 蓄熱冷水槽1 test electrode, 2 counter electrode, 3 reference electrode, 4 power supply, 5
Potentiometer, 6 test water, 7 container, 8 counter electrode combined with reference electrode, 9 copper tube, 10 reference electrode, 11 potentiometer, 1
2 valves, 13 cold water return piping, 14 heat storage cold water tank
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2G050 AA01 BA03 CA01 DA01 EB02 2G055 AA05 BA12 CA06 FA06 4K060 BA15 BA16 CA15 EA11 EB04 FA07 4K062 CA10 EA05 FA05 FA16 GA10 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2G050 AA01 BA03 CA01 DA01 EB02 2G055 AA05 BA12 CA06 FA06 4K060 BA15 BA16 CA15 EA11 EB04 FA07 4K062 CA10 EA05 FA05 FA16 GA10
Claims (5)
極と、第１の電極と電気的に接続している第２の電極
と、電位の基準を与える第３の電極と、第１の電極と第
２の電極の間に電圧を印可する電圧印可手段を備えてな
り、第１の電極と第２の電極の間に所定の一定電流を流
すように構成されてなる銅の腐食検知装置。A first electrode made of a material containing copper as a main component; a second electrode electrically connected to the first electrode; a third electrode for providing a reference of potential; A voltage applying means for applying a voltage between the first electrode and the second electrode, wherein copper is configured to flow a predetermined constant current between the first electrode and the second electrode; Detection device.
定電流は１０μＡ／cm2以下であるように構成されてな
る請求項１に記載の腐食検知装置。2. The corrosion detection device according to claim 1, wherein a predetermined constant current flowing through the first electrode and the second electrode is configured to be 10 μA / cm 2 or less.
またはカーボンからなる請求項１または２に記載の腐食
検知装置。3. The second electrode is made of stainless steel, platinum, copper,
3. The corrosion detection device according to claim 1, wherein the corrosion detection device is made of carbon.
カーボン、またはＡｇ／ＡｇＣｌからなる請求項１〜３
のいずれかに記載の腐食検知装置。4. The third electrode is made of stainless steel, platinum, copper,
4. A composition comprising carbon or Ag / AgCl.
The corrosion detection device according to any one of the above.
求項１〜３のいずれかに記載の腐食検知装置。5. The corrosion detection device according to claim 1, wherein the second electrode also serves as a third electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090924A JP2001281195A (en) | 2000-03-29 | 2000-03-29 | Corrosion detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000090924A JP2001281195A (en) | 2000-03-29 | 2000-03-29 | Corrosion detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001281195A true JP2001281195A (en) | 2001-10-10 |
Family
ID=18606454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000090924A Pending JP2001281195A (en) | 2000-03-29 | 2000-03-29 | Corrosion detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001281195A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006090712A (en) * | 2004-09-21 | 2006-04-06 | Hiroshima Univ | Corrosion tester |
| CN109706457A (en) * | 2017-10-26 | 2019-05-03 | 江苏启能新能源材料有限公司 | A kind of the electron anode protection erosion protection system and method for phase-transition heat-storage equipment |
| JP2019184364A (en) * | 2018-04-06 | 2019-10-24 | 東邦瓦斯株式会社 | Device for determining corrosion of water and method for determining corrosion of water |
| RU2743884C1 (en) * | 2020-08-05 | 2021-03-01 | Общество с ограниченной ответственностью «Техохрана» | Method and device for detecting electrochemical deposition |
| RU219171U1 (en) * | 2022-12-28 | 2023-07-03 | Общество с ограниченной ответственностью "Газпром трансгаз Томск" (ООО "Газпром трансгаз Томск") | Measuring unit of electrochemical copper deposition detection device |
-
2000
- 2000-03-29 JP JP2000090924A patent/JP2001281195A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006090712A (en) * | 2004-09-21 | 2006-04-06 | Hiroshima Univ | Corrosion tester |
| CN109706457A (en) * | 2017-10-26 | 2019-05-03 | 江苏启能新能源材料有限公司 | A kind of the electron anode protection erosion protection system and method for phase-transition heat-storage equipment |
| CN109706457B (en) * | 2017-10-26 | 2023-10-20 | 江苏启能新能源材料有限公司 | Electronic anode protection anti-corrosion device and method for phase change heat storage equipment |
| JP2019184364A (en) * | 2018-04-06 | 2019-10-24 | 東邦瓦斯株式会社 | Device for determining corrosion of water and method for determining corrosion of water |
| RU2743884C1 (en) * | 2020-08-05 | 2021-03-01 | Общество с ограниченной ответственностью «Техохрана» | Method and device for detecting electrochemical deposition |
| RU219171U1 (en) * | 2022-12-28 | 2023-07-03 | Общество с ограниченной ответственностью "Газпром трансгаз Томск" (ООО "Газпром трансгаз Томск") | Measuring unit of electrochemical copper deposition detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10718734B2 (en) | Method for determining antirust effect of treated water | |
| AU2004293772B2 (en) | Method of inhibiting corrosion in hot water systems | |
| EP1292820B1 (en) | Dynamic optimization of chemical additives in a water treatment system | |
| JP6173462B2 (en) | Anti-corrosion performance deterioration detection device, hot-water supply heating system and equipment | |
| US20050045483A1 (en) | Method of producing sensors for monitoring corrosion of heat-exchanger tubes | |
| JPH11118703A (en) | Test piece, method, and device for monitoring corrosion | |
| TWI589866B (en) | Test piece for monitoring pitting corrosion, apparatus for monitoring pitting corrosion, and method for monitoring pitting corrosion | |
| Ko et al. | In situ synchrotron X-ray diffraction studies of CO2 corrosion of carbon steel with scale inhibitors ATMPA and PEI at 80° C | |
| JP2001281195A (en) | Corrosion detection apparatus | |
| JP2012220288A (en) | Anticorrosion performance deterioration detection sensor, and hot water feeding and heating system and facility device equipped with the same | |
| JP2004239638A (en) | Method and apparatus for determining corrosiveness in water | |
| JP2017181486A (en) | Corrosion evaluation method and corrosion evaluation device | |
| JP6762536B2 (en) | Water corrosiveness judgment method and water corrosiveness judgment device | |
| JP2015212623A (en) | Water quality sensor and cooling system including the same | |
| JP2014142265A (en) | Corrosion prevention performance deterioration detection sensor and water circulation system with the same | |
| JP3867357B2 (en) | Metal corrosion monitoring method | |
| JP6015358B2 (en) | Corrosion prevention method for copper alloy heat exchangers | |
| JP2019184364A (en) | Device for determining corrosion of water and method for determining corrosion of water | |
| JP2005156425A (en) | Method for evaluating corrosiveness of water | |
| JP2005189212A (en) | Apparatus and method for measuring amount of adhered contamination | |
| Evans et al. | Measuring the repassivation potential of alloy 22 using the potentiodynamic-galvanostatic-potentiostatic method | |
| Hack et al. | The Effect of Ferrous Sulfate on Sulfide-Induced Corrosion of Copper-Base Condenser Alloys in Aerated Seawater | |
| Royuela et al. | The assessment of short term data of pipe corrosion in drinking water—II. Copper | |
| JP2003075325A (en) | Corrosiveness diagnosis method for water | |
| JPH09229892A (en) | Method for monitoring anticorrosion of stainless steel piping and indoor piping system made of stainless steel |