JPH02268266A - Reference electrode - Google Patents
Reference electrodeInfo
- Publication number
- JPH02268266A JPH02268266A JP1090484A JP9048489A JPH02268266A JP H02268266 A JPH02268266 A JP H02268266A JP 1090484 A JP1090484 A JP 1090484A JP 9048489 A JP9048489 A JP 9048489A JP H02268266 A JPH02268266 A JP H02268266A
- Authority
- JP
- Japan
- Prior art keywords
- electrolyte
- reference electrode
- electrode
- impregnated
- saturated
- 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
- 239000003792 electrolyte Substances 0.000 claims abstract description 22
- 230000002745 absorbent Effects 0.000 claims description 7
- 239000002250 absorbent Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229920000247 superabsorbent polymer Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical class [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 abstract description 9
- 239000011521 glass Substances 0.000 abstract description 7
- 229920001577 copolymer Polymers 0.000 abstract description 6
- 229920006395 saturated elastomer Polymers 0.000 abstract description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 abstract description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000001103 potassium chloride Substances 0.000 abstract description 3
- 235000011164 potassium chloride Nutrition 0.000 abstract description 3
- 239000000843 powder Substances 0.000 abstract description 2
- 230000008961 swelling Effects 0.000 abstract description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 10
- 230000007797 corrosion Effects 0.000 description 9
- 239000008151 electrolyte solution Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 239000000499 gel Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical class [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 230000036544 posture Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000004583 superabsorbent polymers (SAPs) Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野〕 本発明は電解液充填型の基準電極に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an electrolyte-filled reference electrode.
一般に、鋼管杭桟橋や鋼矢板岸壁等の各種鋼構造物ある
いは鉄筋コンクリート構造物の鉄筋等を防食するに際し
、その防食効果が正常に発揮されているかどうかは、こ
れら被防食体が所定の防食電位を保有しているかどうか
を基準電極を用いて測定することにより、確認１判断さ
れる
このような被防食体の防食電位を測定する場合に用いら
れる基準電極は熱力学的電極電位が既知な半電池をもっ
て構成され、この基準電極と被防食体との１１７）の電
位差を測定することにより被防食体の電極電位を検知す
ることができるものである。In general, when corrosion-protecting various steel structures such as steel pipe pile piers and steel sheet pile quays, or reinforcing bars of reinforced concrete structures, whether or not the corrosion-preventing effect is being properly exerted is determined by whether the objects to be protected have a predetermined corrosion protection potential. The reference electrode used to measure the corrosion protection potential of the object to be protected is a half cell whose thermodynamic electrode potential is known. The electrode potential of the object to be protected can be detected by measuring the potential difference 117) between this reference electrode and the object to be protected.
通常、基準電極には、飽和せ永電極、海水せｙＲｆ！！
極、飽和塩化銀電極、海水塩化銀電極等の電解液充填型
基準電極と、亜鉛、モリブデン、タングステン等の金属
を用いた固体基準電極とに大別されるにれら基準電極は
被防食体の種類、その環境等に応じて選択使用される。Usually, the reference electrode is a saturated electrode, a seawater electrode, or a seawater electrode. !
These reference electrodes are roughly divided into electrolyte-filled reference electrodes such as electrodes, saturated silver chloride electrodes, and seawater silver chloride electrodes, and solid reference electrodes using metals such as zinc, molybdenum, and tungsten. It is selected and used depending on the type of equipment, its environment, etc.
このうち、電解液充填型基準電極は、例えば特公昭３６
−２１０９８号公報に見られるように１通常、基準電極
容器内に銀、水銀等の金属電極とこれら金属電極イオン
活量を一定に保持した電解液とが内装され、先端は水栓
等の多孔質物質が嵌合され、外部の被防食体と電気的導
通が図られるように構成される。すなわち、木栓等の多
孔質物質に浸透した基準電極内の電解液が被防食体を含
む環境水溶液と接触し、被防食体の電位を測定するもの
である。Among these, the electrolyte-filled reference electrode is, for example,
As seen in Publication No. 21098, 1 Usually, a reference electrode container contains metal electrodes such as silver or mercury and an electrolytic solution that keeps the ionic activity of these metal electrodes constant, and the tip has a porous hole such as a water faucet. The structure is configured such that the material is fitted and electrical continuity is established with the external object to be protected from corrosion. That is, the electrolytic solution in the reference electrode that has permeated into a porous material such as a wooden plug comes into contact with an environmental aqueous solution containing the object to be protected, and the potential of the object to be protected is measured.
このような電解液充填型基準電極では、電極内に充填さ
れた電解液が使用を重ねるに従って経時的に漏洩あるい
は蒸発等によって、所定量より液量が減少してしまうこ
とが避けられない。In such an electrolyte-filled reference electrode, as the electrolyte filled in the electrode is repeatedly used, it is inevitable that the amount of the electrolyte will decrease from a predetermined amount due to leakage or evaporation over time.
従って、基準電極の先端を下向きにして測定する場合に
は前述のように被防食体との間で電解液同志の接触が保
たれ、被防食体の防食電位が８１１定可能であるが、被
防食体の下面あるいは側面に基準電極を当接させて被防
食体の防食電位をａｌｌ定する場合のように基準電極を
上向きまたは横向きにして測定する時には基準電極先端
部に気泡が溜り、基準電極と被防食体との電気的接触が
形成されず、被防食体の防食電位が測定不能となるおそ
れを有するという問題点があった。Therefore, when measuring with the tip of the reference electrode facing downward, contact between the electrolyte and the object to be protected is maintained as described above, and the corrosion protection potential of the object to be protected can be determined. When measuring with the reference electrode facing upward or sideways, such as when determining the corrosion protection potential of the object to be protected by bringing the reference electrode into contact with the bottom or side surface of the object, air bubbles may accumulate at the tip of the reference electrode. There is a problem in that electrical contact is not formed between the corrosion protector and the corrosion protection target, and the corrosion protection potential of the corrosion protection target may become impossible to measure.
本発明では全姿勢での測定が可能な基準電極を提供する
ことを目的とするものである。An object of the present invention is to provide a reference electrode that allows measurement in all postures.
本発明は電解液充填型基準電極における電解液を高吸収
性部材に含浸、膨潤させてゲル化させることにより箭記
課題を達成したものである。The present invention has achieved the aforementioned problem by impregnating a superabsorbent member with an electrolyte in an electrolyte-filled reference electrode, causing the superabsorbent member to swell and gel.
本発明における高吸収性部材とは、ポリアクリル酸塩、
ポリビニルアルコール／アクリル酸塩共重合体、イソブ
チレン／無水マレイン酸共重合体、澱粉・アクリル酸グ
ラフ１−共重合体塩、ポリエチレンオキサイド変性物等
のいわゆる高吸水性ポリマーが好ましく、これらの粉末
にバルブ、シリカゲル等の適当な吸水性物質を混合して
粘度を調節した混合物も使用できる。The superabsorbent member in the present invention includes polyacrylate,
Preferred are so-called super absorbent polymers such as polyvinyl alcohol/acrylate copolymer, isobutylene/maleic anhydride copolymer, starch/acrylic acid graph 1 copolymer salt, polyethylene oxide modified product, etc. A mixture in which the viscosity is adjusted by mixing a suitable water-absorbing substance such as silica gel or the like can also be used.
本発明では基準電極内の電解液が高吸収部材に含浸、膨
潤されてゲル化されているため、全姿勢での基準電極の
使用が可能となり、しかも電解液が蒸発等により減少す
る度合いが著しく少なくなり、電解液の補充の回数が少
なくてずむ。In the present invention, the electrolytic solution in the reference electrode is impregnated into a highly absorbent material and swelled to form a gel, making it possible to use the reference electrode in all positions, and the degree to which the electrolytic solution decreases due to evaporation etc. is significant. This reduces the number of times the electrolyte needs to be replenished.
以下に、本発明に係る基準電極の実施例を添付図面を参
照して説明する。Embodiments of the reference electrode according to the present invention will be described below with reference to the accompanying drawings.
第１図は飽和は求′に１極の典型例を示すものである。FIG. 1 shows a typical example where saturation is one pole.
この第１図において、１はプラスチック製等のＷｉｗＡ
筒体であり、この電極筒体１内にはガラス容器２内に水
銀３が封入され、この水銀３内にその先端が達する白金
線電極４が設けられている。この白金線電極４はガラス
溶封部５の上でリード線と接続し、充填材部６を通って
外部へ引き出されている。そして、ガラス容器２の下部
には塩化水銀（甘木）の塩化カリ飽和ペースト７が、そ
してその下端にはパツキン（綿栓）８が設けられている
。電極筒体１内のその他の部分には高吸収性部材として
ポリビニルアルコール／アクリル酸塩共重合体の粉末９
に含浸、膨潤されてゲル化された飽和塩化カリ溶液（？
！！解液）ＩＯが充填されている。このような電極の先
端にはゲル化電解液１０が外部と直接電気的接触を保た
せるために適当な孔が明けられた物質、あるいは水栓、
吸水スポンジ、ガラスフィルター、素焼板等の多孔質物
質からなる栓１１が設けられている。この多孔質物質の
栓を使用して測定する場合には外部より電解液でしぬら
せて用いることが肝要である。In this Fig. 1, 1 is a WiWA made of plastic etc.
The electrode cylinder 1 has a glass container 2 sealed with mercury 3, and a platinum wire electrode 4 whose tip reaches inside the mercury 3. This platinum wire electrode 4 is connected to a lead wire on the glass melting part 5 and is drawn out through the filler part 6 to the outside. A potassium chloride saturated paste 7 of mercury chloride (Amagi) is provided at the bottom of the glass container 2, and a cotton plug 8 is provided at the lower end thereof. In other parts of the electrode cylinder 1, polyvinyl alcohol/acrylate copolymer powder 9 is used as a highly absorbent material.
A saturated potassium chloride solution (?) is impregnated, swollen and gelled.
! ! solution) is filled with IO. At the tip of such an electrode, there is a material with a suitable hole made in order to maintain direct electrical contact between the gelled electrolyte 10 and the outside, or a water faucet, etc.
A plug 11 made of a porous material such as a water-absorbing sponge, a glass filter, or a clay plate is provided. When making measurements using a plug made of this porous material, it is important to moisten it with electrolyte from the outside.
なお、この第１図は飽和甘木電極について述べたもので
あるが、他の電解液充填型基準ｆｆｉ極についても電極
構造の若干の違いおよび電解液の違いはあるものの、こ
の第１図に示したと同様の高吸収性部材に電解液を含浸
、膨潤させることにより本発明の基準電極が得られる。Although this Figure 1 describes the saturated Amagi electrode, other electrolyte-filled standard FFI electrodes are also shown in Figure 1, although there are slight differences in electrode structure and electrolyte. The reference electrode of the present invention can be obtained by impregnating and swelling a highly absorbent member similar to the above with an electrolytic solution.
以上説明したところから明らかなように５本発明の基準
電極は、電解液が高吸収性部材に含浸、膨潤されてゲル
化されているので、被防食体の下面もしくは側面に基準
電極を当接させて防食電位を測定する場合にも基準電極
先端の電解液空隙部が生ずることカ貸、１コ＜、全姿勢
での基準電極の使用が可能となる。しかも、電解液が高
吸収性部材に含浸、膨潤されてゲル化されているので電
解液の消耗が極力防止され、電解液の補充回数が大幅に
減少できるという効果を有する。As is clear from the above explanation, in the reference electrode of the present invention, the electrolytic solution is impregnated into a highly absorbent member and swelled to form a gel. Even when measuring the anti-corrosion potential, an electrolyte gap is created at the tip of the reference electrode, which makes it possible to use the reference electrode in all positions. Moreover, since the electrolytic solution is impregnated into the highly absorbent member and swollen to form a gel, consumption of the electrolytic solution is prevented as much as possible, and the number of times the electrolytic solution is replenished can be significantly reduced.
第１図は本発明に係る基準電極として飽和ｌ」水電極の
典型例を示す断面説明図である。
１・・・電極筒体 ２・・・ガラス容器３
・・・水銀 ４・・・白金線電極５・
・・ガラス溶封部 ６・・・充填材部７・・・
塩化カリ飽和ペースト ８・・・パツキン９・・・ポリ
ビニルアルコール／アクリル酸塩共重合体１０・・・飽
和塩化カリ溶液 １１・・・栓兜
圓FIG. 1 is an explanatory cross-sectional view showing a typical example of a saturated l'' water electrode as a reference electrode according to the present invention. 1... Electrode cylinder body 2... Glass container 3
...Mercury 4...Platinum wire electrode 5.
...Glass melting part 6...Filling material part 7...
Potassium chloride saturated paste 8...Putkin 9...Polyvinyl alcohol/acrylate copolymer 10...Saturated potassium chloride solution 11...Bukkatsuan
Claims (1)
性部材に含浸、膨潤されてゲル化されたものであること
を特徴とする基準電極。 ２、高吸収性部材が高吸水性ポリマーである請求項１記
載の基準電極。 ３、高吸収性部材が高吸水性ポリマーと吸水性物質との
混合物からなる請求項１記載の基準電極。[Claims] 1. An electrolyte-filled reference electrode, characterized in that the electrolyte is impregnated into a highly absorbent member and swollen to form a gel. 2. The reference electrode according to claim 1, wherein the superabsorbent member is a superabsorbent polymer. 3. The reference electrode according to claim 1, wherein the superabsorbent member is made of a mixture of a superabsorbent polymer and a water absorbent substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1090484A JPH02268266A (en) | 1989-04-10 | 1989-04-10 | Reference electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1090484A JPH02268266A (en) | 1989-04-10 | 1989-04-10 | Reference electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02268266A true JPH02268266A (en) | 1990-11-01 |
Family
ID=13999833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1090484A Pending JPH02268266A (en) | 1989-04-10 | 1989-04-10 | Reference electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02268266A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015209743A (en) * | 2014-04-30 | 2015-11-24 | 国立研究開発法人物質・材料研究機構 | Desalination treatment method of concrete, desalination treatment system, realkalization treatment method, realkalization treatment system, and salinity sensor and pH sensor used therefor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469495A (en) * | 1977-11-14 | 1979-06-04 | Nippon Paint Co Ltd | Comparing electrode for potential difference measurement for ph level measurement etc* |
| JPS6073350A (en) * | 1983-09-07 | 1985-04-25 | プロトン・アクチエンゲゼルシヤフト | Measuring sonde measuring ion concentration by measurement of potential difference and manufacture of said measuring sonde |
| JPS6318259A (en) * | 1986-07-10 | 1988-01-26 | Terumo Corp | Reference electrode |
| JPH01296156A (en) * | 1988-05-24 | 1989-11-29 | Nippon Steel Corp | Electrochemical measuring sensor and diagnosing method of corrosion resisting function of coating film |
-
1989
- 1989-04-10 JP JP1090484A patent/JPH02268266A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5469495A (en) * | 1977-11-14 | 1979-06-04 | Nippon Paint Co Ltd | Comparing electrode for potential difference measurement for ph level measurement etc* |
| JPS6073350A (en) * | 1983-09-07 | 1985-04-25 | プロトン・アクチエンゲゼルシヤフト | Measuring sonde measuring ion concentration by measurement of potential difference and manufacture of said measuring sonde |
| JPS6318259A (en) * | 1986-07-10 | 1988-01-26 | Terumo Corp | Reference electrode |
| JPH01296156A (en) * | 1988-05-24 | 1989-11-29 | Nippon Steel Corp | Electrochemical measuring sensor and diagnosing method of corrosion resisting function of coating film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015209743A (en) * | 2014-04-30 | 2015-11-24 | 国立研究開発法人物質・材料研究機構 | Desalination treatment method of concrete, desalination treatment system, realkalization treatment method, realkalization treatment system, and salinity sensor and pH sensor used therefor |
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