JPS62227475A - Anticorrosion treatment using magnetic fluid - Google Patents
Anticorrosion treatment using magnetic fluidInfo
- Publication number
- JPS62227475A JPS62227475A JP7107986A JP7107986A JPS62227475A JP S62227475 A JPS62227475 A JP S62227475A JP 7107986 A JP7107986 A JP 7107986A JP 7107986 A JP7107986 A JP 7107986A JP S62227475 A JPS62227475 A JP S62227475A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- exposed surface
- solvent
- anticorrosive
- fine powder
- 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
- 239000011553 magnetic fluid Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003350 kerosene Substances 0.000 abstract description 2
- 239000002480 mineral oil Substances 0.000 abstract description 2
- 235000010446 mineral oil Nutrition 0.000 abstract description 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 11
- 239000003960 organic solvent Substances 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- -1 unsaturated fatty acid ions Chemical class 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000005536 corrosion prevention Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 229940049964 oleate Drugs 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、水道配管等の被処理体を磁性流体を用いて
防食処理する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for anticorrosion treatment of objects to be treated, such as water pipes, using a magnetic fluid.
（従来の技術）
建築物への水道配管は、直管を種々の形状の継手により
連結して構成されている。この直管には、従来亜鉛メッ
キ鋼管が使用されていた。しかし水道水には遊離塩素が
含まれているため数年で腐食が生じる不都合があった。(Prior Art) Water piping for buildings is constructed by connecting straight pipes with joints of various shapes. Conventionally, galvanized steel pipes have been used for these straight pipes. However, tap water contains free chlorine, which causes corrosion within a few years.
そこで、最近では直管にライニング鋼管を使用する傾向
にある。このライニング鋼管は、内側に塩化ビニル樹脂
等の耐食層をライニングしたちのである。この場合、直
管の内面では腐食が生じないが、直管の両端部および継
手での腐食が問題となっている。すなわち、直管は長尺
のライニング鋼管を切断して用いられるので、その切断
された端面はライニングされておらずこの端面が腐食す
る。また、直管の端部と継手に形成されたねじ部も腐食
する。継手の内面もライニングされていないので腐食す
る。Therefore, recently there has been a tendency to use lined steel pipes for straight pipes. This lined steel pipe is lined with a corrosion-resistant layer such as vinyl chloride resin. In this case, corrosion does not occur on the inner surface of the straight pipe, but corrosion at both ends of the straight pipe and at the joints poses a problem. That is, since the straight pipe is used by cutting a long lined steel pipe, the cut end face is not lined and corrodes. In addition, the threaded portions formed at the ends of the straight pipes and the joints also corrode. The inner surface of the joint is also not lined, so it corrodes.
これに対処するに、継手の内面をエポキシ樹脂でライニ
ングし、直管の端面や直管および継手のねじ部に、防食
剤を加えた塗料を塗る方法がある。To deal with this, there is a method of lining the inner surface of the joint with epoxy resin and applying a paint containing an anticorrosive agent to the end face of the straight pipe and the threaded portion of the straight pipe and joint.
また、実公昭５８−３２０６９号公報に見られるように
、プラスチック、ステンレス等の耐食性のコアを用いる
方法が開発されている。詳述すると、コアを、一端に７
ランジを有する短筒状に形成し、このコアとがスケット
等との組み合わせで、直管の端面とねじ部を被覆し、さ
らに継手の内面をエポキシ樹脂等で被覆するものである
。Furthermore, as seen in Japanese Utility Model Publication No. 58-32069, a method using a corrosion-resistant core made of plastic, stainless steel, or the like has been developed. In detail, the core is 7
It is formed into a short cylindrical shape with a flange, and this core is combined with a sket to cover the end face and threaded portion of the straight pipe, and the inner surface of the joint is coated with epoxy resin or the like.
（発明が解決しようとする問題点）
しかし、前者の方法では、直管の端面およびねし部等に
、塗料をむらなく完全に塗るのは困難であり、塗布が不
完全な所から腐食が生じてしまう。(Problem to be Solved by the Invention) However, with the former method, it is difficult to apply paint evenly and completely to the end faces and neck portions of straight pipes, and corrosion occurs from incompletely applied areas. It will happen.
主た、後者の方法は池の方法に比べて有効ではあるが、
コアと継手との間、コアと直管との間のわずかな隙間が
ち水が浸透して腐食が生じる可能性が残されており、改
善の余地があった。Although the latter method is more effective than Ike's method,
There was room for improvement as there was a possibility that water could penetrate into the small gaps between the core and the joint and between the core and the straight pipe and cause corrosion.
なお、磁性流体については、特公昭５３−１７１１８号
公報に記載がある。The magnetic fluid is described in Japanese Patent Publication No. 17118/1983.
また、磁性流体を用いた防食方法については特開昭６０
−２０８５６３号公報に記載がある。しかし、この技術
は鉄筋の腐食防止に関するものであり、本発明のように
中空の被処理体の腐食防止に適用されるものではない。In addition, regarding the anti-corrosion method using magnetic fluid, JP-A-60
It is described in the -208563 publication. However, this technique relates to corrosion prevention of reinforcing bars, and is not applied to corrosion prevention of hollow objects to be treated like the present invention.
また、本発明の特徴部となる被処理体への磁性流体の充
填、抜き取りおよび残された磁性流体中の溶媒の揮散に
関する記載はない。Further, there is no description regarding the filling and extraction of the magnetic fluid into the object to be processed, and the volatilization of the solvent in the remaining magnetic fluid, which are the characteristic features of the present invention.
（問題点を解決するための手段）
この発明は上記問題点を解消するｔこめになされたもの
で、その要旨は、強磁性金属の露出面を内側に有する中
空の被処理体を、防食処理する方法において、強磁性微
粉末と防食剤を溶媒中に混ぜてなる磁性流体を、上記被
処理体内に充填し、次に、磁性流体を被処理体から抜き
取り、上記強磁性金属の露出面に付いた磁性流体から溶
媒を揮散させることを特徴とする磁性流体を用いた防食
処理方法にある。(Means for Solving the Problems) This invention has been made with the aim of solving the above problems, and its gist is to treat a hollow object having an exposed surface of ferromagnetic metal inside with anti-corrosion treatment. In the method of The present invention relates to a method for anticorrosion treatment using a magnetic fluid, which is characterized by volatilizing a solvent from the magnetic fluid attached to the magnetic fluid.
（作用）
強磁性微粉末と防食剤を溶媒中に混ぜてなる磁性流体を
、被処理体内に充填する。次に、磁性流体を被処理体か
ら抜き取る。この際、被処理体内における強磁性金属の
露出面金てに、磁性流体がその磁気により付着して残る
。次に、上記露出面に付いた磁性流体から溶媒を揮散さ
せる。この結果、防食剤を強磁性金属の露出面に余す所
なく付着させることができ、この露出面での腐食を確実
に防止できる。(Operation) A magnetic fluid made by mixing ferromagnetic fine powder and an anticorrosive agent in a solvent is filled into the object to be treated. Next, the magnetic fluid is extracted from the object to be processed. At this time, the magnetic fluid remains attached to the exposed surface of the ferromagnetic metal in the object to be processed due to its magnetism. Next, the solvent is evaporated from the magnetic fluid attached to the exposed surface. As a result, the anticorrosive agent can be completely adhered to the exposed surface of the ferromagnetic metal, and corrosion on this exposed surface can be reliably prevented.
（実施例）
以下、この発明方法の一実施例を図面に基づいて説明す
る。(Example) Hereinafter, an example of the method of this invention will be described based on the drawings.
図中１は水道配管（被処理体）を示し、この水道配管１
は複数本の直管１０を継手２０により連結してなるもの
である。直管１０は、鋼管１１の内側に塩化ビニル樹脂
等のライニング層１２を形成してなるものである。鋼管
１１の端部外周面には雄ねじ部１３が形成されている。1 in the figure indicates a water pipe (object to be treated), and this water pipe 1
is formed by connecting a plurality of straight pipes 10 with a joint 20. The straight pipe 10 is formed by forming a lining layer 12 of vinyl chloride resin or the like on the inside of a steel pipe 11. A male threaded portion 13 is formed on the outer peripheral surface of the end portion of the steel pipe 11 .
また、継手２０は例乏ば鋼管からなり、その両端部内周
面には雌ねじ部２１が形成されており、この雌ねじ部２
１を除く内面にはエポキシ樹脂等のライニング層２２が
塗布されている。そして、上記直管１０の雄ねじ部１３
を継手２０の雌ねじ部２１にねじ込むことにより、水道
配管１が得られる。Further, the joint 20 is made of, for example, a steel pipe, and female threaded portions 21 are formed on the inner circumferential surface of both ends thereof.
A lining layer 22 made of epoxy resin or the like is coated on the inner surfaces except for one. And the male threaded portion 13 of the straight pipe 10
By screwing into the female threaded portion 21 of the joint 20, the water pipe 1 is obtained.
この水道配管１において、鋼管１１の端面１１ａが鉄生
地の露出面となる。また、直管１０をねし込み過ぎると
、その雄ねじ８１Ｓ１３が雌ねじ部２１の端から継手２
０内に突出してこの部位が鉄生地の露出面となり、逆に
直管１０のねじ込みが足りないと、継手２０の雌ねじ部
２１の一部が鉄生地の露出面となる。さらに、両ねじ部
１３．２１のわずかな隙間から水が侵入可能な場合は、
この侵入領域も鉄生地の露出面となる。In this water pipe 1, the end surface 11a of the steel pipe 11 becomes the exposed surface of the iron material. Also, if the straight pipe 10 is screwed in too much, the male thread 81S13 will be inserted from the end of the female thread 21 into the joint 2.
If the straight pipe 10 is not screwed in enough, a part of the female threaded portion 21 of the joint 20 will become an exposed surface of the iron material. Furthermore, if water can enter through a small gap between both threaded parts 13.21,
This intrusion area also becomes an exposed surface of the iron fabric.
上記構成の水道配管１に対して本発明方法を実行する。The method of the present invention is performed on the water pipe 1 having the above configuration.
磁性流体を用意する。すなわち、強磁性材料（マグネタ
イト、各種フェライト）からなる２０ｎｍ以下の微粉末
を、オレイン酸イオンのよ、うな長鎖不飽和脂肪酸イオ
ンで被覆し、溶媒であるケロシン等の有機溶剤中に分散
させ、さらに、鉱物油等の防食剤を前記有機溶剤中に分
散または溶解させることに１會）、磁性流体を得る。こ
の際、公知の界面活性剤を使ってもよい６強磁性微粉末
の粒径が小さく単磁区となるため、各微粉末が有機溶剤
中で微少の磁石とほぼ等しい挙動を示す。なお、有機溶
剤は揮発しやすいものが好ましい。Prepare magnetic fluid. That is, fine powder of 20 nm or less made of ferromagnetic material (magnetite, various ferrites) is coated with long-chain unsaturated fatty acid ions such as oleate ions, and dispersed in an organic solvent such as kerosene. Furthermore, a magnetic fluid is obtained by dispersing or dissolving an anticorrosive agent such as mineral oil in the organic solvent. At this time, since the particle size of the 6 ferromagnetic fine powder, which may be used with a known surfactant, is small and forms a single magnetic domain, each fine powder exhibits almost the same behavior as a minute magnet in the organic solvent. Note that it is preferable that the organic solvent is easily volatile.
上記水道配管１の一端を閉塞し、地端から上記磁性流体
を供給し、水道配管１内を磁性流体で充満させる。One end of the water pipe 1 is closed, and the magnetic fluid is supplied from the ground end to fill the water pipe 1 with the magnetic fluid.
次に、磁性流体を水道配管１がら抜き取る。この時、磁
性流体の一部は、その磁気により鉄生地の露出面となる
鋼管１１の端面１１ａおよび雄ねじ部１３．雌ねじ部２
１に余す所なく付着して残る。Next, the magnetic fluid is extracted from the water pipe 1. At this time, a part of the magnetic fluid is transferred to the end surface 11a of the steel pipe 11, which becomes the exposed surface of the iron fabric, and the male threaded portion 13. Female thread part 2
It remains completely attached to 1.
次に、常温空気または加熱空気を水道配管１内に流すか
、真空ポンプで水道配管１内を減圧することにより、水
道配管１内に残された磁性流体中の有機溶剤を揮散させ
る。この結果、強磁性微粉末と防食剤が鉄生地の露出面
に残される。防食剤は鉄生地の露出面に余すところなく
付着されるため、腐食を確実に防止できる。Next, the organic solvent in the magnetic fluid remaining in the water pipe 1 is volatilized by flowing normal temperature air or heated air into the water pipe 1 or by reducing the pressure inside the water pipe 1 with a vacuum pump. As a result, fine ferromagnetic powder and anticorrosion agent are left on the exposed surface of the iron fabric. Since the anti-corrosion agent is fully applied to the exposed surface of the iron fabric, corrosion can be reliably prevented.
上記有機溶剤の揮発後において、上記防食剤はそれ自体
の有する付着機能によって上記露出面に付着する。After the organic solvent evaporates, the anticorrosive agent adheres to the exposed surface due to its own adhesion function.
上記強磁性微粉末は、その磁気により、磁性流体の抜き
取り時に防食剤を露出面に留める役割を担う。上記有機
溶剤の揮発後において、強磁性微粉末は防食剤内に残り
その磁力により防食剤の露出面への付着を助けるが、こ
の機能は必要不可欠なものではなく、微粉末が露出面か
ら脱落しても差し支えない。Due to its magnetism, the ferromagnetic fine powder plays the role of keeping the anticorrosive agent on the exposed surface when the magnetic fluid is extracted. After the organic solvent evaporates, the ferromagnetic fine powder remains in the anticorrosive agent and its magnetic force helps the anticorrosive agent adhere to the exposed surface, but this function is not essential and the fine powder falls off from the exposed surface. It's okay to do that.
本発明は上記実施例に制約されず種々の態様が可能であ
る。例えば、上記水道配管において、継手の内面にエポ
キシ樹脂のライニングを形成せず、この内面をも本発明
方法により防食処理してもよし１１１
また、前述した従来方法のようにコアを用いて防食構造
とし、さらに本発明方法の防食処理を付加してもよい。The present invention is not limited to the above embodiments, and various embodiments are possible. For example, in the above-mentioned water pipe, the inner surface of the joint may be treated with anti-corrosion treatment using the method of the present invention without forming an epoxy resin lining on the inner surface of the joint. In addition, anticorrosion treatment according to the method of the present invention may be added.
上記実施例では新規に設置される水道配管に本発明を適
用したが、既設の水道配管に適用することもできる。例
えば長期間使用した水道配管の腐食部をクリーニングに
より除去した後、本発明方法を実行して更生してもよい
。また、孔食が生している場合でも、この孔に強磁性微
粉末と防食剤を埋め込んで閉塞することができる。In the above embodiments, the present invention was applied to newly installed water pipes, but it can also be applied to existing water pipes. For example, after the corroded parts of water pipes that have been used for a long period of time are removed by cleaning, the method of the present invention may be carried out to rehabilitate the pipes. Furthermore, even if pitting corrosion occurs, the holes can be filled with ferromagnetic fine powder and an anticorrosive agent to close them.
また、溶媒として有機溶剤の代わりに水を用いてもよい
。Furthermore, water may be used as the solvent instead of the organic solvent.
さらに、本発明方法は、水道配管のみならず、腐食性ブ
スの配管、鉄パイプの加工製品、細い孔が形成されてい
る鉄製品、缶、腐食性〃スを充填するボンベ等にも適用
できる。Furthermore, the method of the present invention can be applied not only to water piping, but also to corrosive bus piping, processed iron pipe products, iron products with thin holes, cans, cylinders filled with corrosive gas, etc. .
（発明の効果）
以上説明したように、この発明では、強磁性微粉末と防
食剤を有機溶剤中に混ぜてなる磁性流体を、被処理体内
に充填した後抜き取り、残された磁性流体から有機溶剤
を揮散させることにより、被処理体内における強磁性金
属の露出面に余す所なく防食剤を付着させることができ
、この露出面での腐食を確実に防止でとる。(Effects of the Invention) As explained above, in this invention, a magnetic fluid made by mixing ferromagnetic fine powder and an anticorrosive agent in an organic solvent is filled into the object to be treated, and then extracted, and the remaining magnetic fluid is By volatilizing the solvent, the anticorrosive agent can be completely adhered to the exposed surface of the ferromagnetic metal in the object to be treated, and corrosion on this exposed surface can be reliably prevented.
【図面の簡単な説明】
図面はこの発明方法が適用される水道配管の断面図を示
すものである。
１・・・水道配管（被処理体）、１１ａ、１３．２１・
・・強磁性金属の露出面BRIEF DESCRIPTION OF THE DRAWINGS The drawing shows a cross-sectional view of a water pipe to which the method of the present invention is applied. 1... Water pipe (object to be treated), 11a, 13.21.
・Exposed surface of ferromagnetic metal
Claims (1)
体を、防食処理する方法において、強磁性微粉末と防食
剤を溶媒中に混ぜてなる磁性流体を、上記被処理体内に
充填し、次に、磁性流体を被処理体から抜き取り、上記
強磁性金属の露出面に付いた磁性流体から溶媒を揮散さ
せることを特徴とする磁性流体を用いた防食処理方法。(1) In a method for anticorrosion treatment of a hollow object to be treated that has an exposed surface of ferromagnetic metal inside, a magnetic fluid made by mixing fine ferromagnetic powder and an anticorrosive agent in a solvent is filled into the object to be treated. A method for anticorrosion treatment using a magnetic fluid, characterized in that the magnetic fluid is then extracted from the object to be treated, and the solvent is evaporated from the magnetic fluid attached to the exposed surface of the ferromagnetic metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107986A JPS62227475A (en) | 1986-03-31 | 1986-03-31 | Anticorrosion treatment using magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7107986A JPS62227475A (en) | 1986-03-31 | 1986-03-31 | Anticorrosion treatment using magnetic fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62227475A true JPS62227475A (en) | 1987-10-06 |
Family
ID=13450154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7107986A Pending JPS62227475A (en) | 1986-03-31 | 1986-03-31 | Anticorrosion treatment using magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62227475A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945699A (en) * | 1972-09-04 | 1974-05-01 | ||
| JPS508473A (en) * | 1972-11-29 | 1975-01-28 | ||
| JPS5464537A (en) * | 1977-11-01 | 1979-05-24 | Osaka Gas Co Ltd | Surface covering of metal |
-
1986
- 1986-03-31 JP JP7107986A patent/JPS62227475A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4945699A (en) * | 1972-09-04 | 1974-05-01 | ||
| JPS508473A (en) * | 1972-11-29 | 1975-01-28 | ||
| JPS5464537A (en) * | 1977-11-01 | 1979-05-24 | Osaka Gas Co Ltd | Surface covering of metal |
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