JPS63223187A - Method for preventing embrittlement of titanium material equipment and improving corrosion resistance - Google Patents
Method for preventing embrittlement of titanium material equipment and improving corrosion resistanceInfo
- Publication number
- JPS63223187A JPS63223187A JP5768887A JP5768887A JPS63223187A JP S63223187 A JPS63223187 A JP S63223187A JP 5768887 A JP5768887 A JP 5768887A JP 5768887 A JP5768887 A JP 5768887A JP S63223187 A JPS63223187 A JP S63223187A
- Authority
- JP
- Japan
- Prior art keywords
- equipment
- corrosion resistance
- hot water
- water
- titanium material
- 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
- 239000000463 material Substances 0.000 title claims abstract description 26
- 230000007797 corrosion Effects 0.000 title claims abstract description 12
- 238000005260 corrosion Methods 0.000 title claims abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims description 29
- 229910052719 titanium Inorganic materials 0.000 title claims description 29
- 239000010936 titanium Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000006866 deterioration Effects 0.000 claims description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 14
- 238000007254 oxidation reaction Methods 0.000 abstract description 14
- 239000002351 wastewater Substances 0.000 abstract description 13
- 238000010992 reflux Methods 0.000 abstract description 8
- 238000005192 partition Methods 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 14
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 12
- 238000004891 communication Methods 0.000 description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- QOSATHPSBFQAML-UHFFFAOYSA-N hydrogen peroxide;hydrate Chemical compound O.OO QOSATHPSBFQAML-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、チタン材から形成された被処理設備、例えば
廃水処理設備の水素による脆化を防止し、耐食性を向上
する方法に係り、遊離水素を多く含む処理水に接触する
チタン材製設備に利用できる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for preventing embrittlement due to hydrogen and improving corrosion resistance of equipment to be treated made of titanium material, such as waste water treatment equipment. It can be used for titanium equipment that comes into contact with treated water containing a large amount of hydrogen.
一般に、硫化水素、アンモニア、シアン等が含まれ、遊
離水素が多い廃水を処理する設備にチタンを使用した場
合、チタンが水素を吸収して水素脆化を起こし、橿端な
場合は割れを発生することがある。In general, when titanium is used in equipment that treats wastewater that contains hydrogen sulfide, ammonia, cyanide, etc. and has a large amount of free hydrogen, titanium absorbs hydrogen and causes hydrogen embrittlement, and cracks occur if the ends are rough. There are things to do.
この対策としてチタン表面に数百人オーダーの酸化皮膜
を形成させることが有効であることが知られている。As a countermeasure against this problem, it is known that it is effective to form an oxide film on the titanium surface in the order of several hundred layers.
この酸化皮膜を作る方法として、■チタン材の高温加熱
、■塩酸処理、あるいは■硝酸処理（特公昭５８−２２
７４号）がある。Methods for creating this oxide film include: ■ high-temperature heating of titanium material, ■ hydrochloric acid treatment, or ■ nitric acid treatment (Japanese Patent Publication No. 58-22
No. 74).
しかし、廃水処理設備、例えば廃水ストリッパーリフラ
ンクスクーラーに、最も容易な酸化処理方法である高温
加熱法、すなわち、６００°Ｃで１０〜３０分間のバー
ナー加熱による大気酸化を行おうとすると、設備の廃水
通過チューブとこのチューブの端部が固定されるチュー
ブシートとの接続部分の加熱時に、高温による熱歪が発
生し、かつ、チューブ周面に固定されたアルミニウム製
のフィンの固定が緩む可能性があるため、酸化処理後の
設備の性能保証が得られないという問題があり、実際上
、この方法は採用できない。However, when attempting to perform atmospheric oxidation on wastewater treatment equipment, such as a wastewater stripper reflux cooler, by using the high-temperature heating method, which is the easiest oxidation treatment method, i.e., atmospheric oxidation using burner heating at 600°C for 10 to 30 minutes, the wastewater from the equipment When the connection between the passing tube and the tube sheet to which the end of the tube is fixed is heated, thermal distortion may occur due to the high temperature, and there is a possibility that the fixation of the aluminum fins fixed to the circumferential surface of the tube may loosen. Therefore, there is a problem that the performance of the equipment after the oxidation treatment cannot be guaranteed, and this method cannot be adopted in practice.
また、塩酸または硝酸による処理方法も検討したが、い
ずれも１００℃以上の温度が必要であり、かつ、酸化に
用いた廃液の後処理も必要であり、処理の取り扱いが面
倒であるという問題点がある。We also considered treatment methods using hydrochloric acid or nitric acid, but both require a temperature of 100°C or higher, and also require post-treatment of the waste liquid used for oxidation, making treatment difficult. There is.
本発明の目的は、従来の酸化処理に代わって簡易に実施
でき、設備への悪影響もないチタン材設備の詭化防止お
よび耐食性向上方法を提供するにある。An object of the present invention is to provide a method for preventing deterioration of titanium equipment and improving corrosion resistance, which can be easily carried out in place of conventional oxidation treatment and has no adverse effect on the equipment.
Ｃ問題点を解決するための手段〕
本発明は、過酸化水素水を０．ＩＷｔＸ以上含む水にチ
タン材から形成された被処理設備を５０°Ｃ以上の温度
で接触させて所定時間保持し、チタン材の表面に５０Å
以上の酸化皮膜を形成した後洗浄処理するものである。Means for Solving Problem C] In the present invention, hydrogen peroxide solution is reduced to 0. The equipment to be treated made of titanium material is brought into contact with water containing IWtX or more at a temperature of 50°C or more and held for a predetermined period of time, and the surface of the titanium material is coated with 50 Å.
After the above oxide film is formed, a cleaning treatment is performed.
本発明において、水の過酸化水素水の含有量は、好まし
くは０．５〜５．ＯＷｔχになるように、一定時間、例
えば２時間毎にチェックし、調整する。これにより、安
定した酸化皮膜の形成が可能となる。また、被処理設備
と水との接触時の温度は、好ましくは９０±５°Ｃであ
り、この温度であれば、酸化速度も速く、一方、１００
°Ｃ以下であるから加圧設備となることもなく、設備も
簡易にできる。さらに、酸化皮膜の厚さは、好ましくは
１５０〜５０００人、より好ましくは２００〜３０００
人の厚さであり、この厚さであれば、水素に対する十分
な保護皮膜となり得る。In the present invention, the hydrogen peroxide content of water is preferably 0.5 to 5. It is checked and adjusted at regular intervals, for example, every two hours, so that OWtχ is achieved. This makes it possible to form a stable oxide film. Further, the temperature at the time of contact between the equipment to be treated and water is preferably 90±5°C, and at this temperature, the oxidation rate is fast;
Since the temperature is below °C, there is no need for pressurized equipment, and the equipment can be simplified. Furthermore, the thickness of the oxide film is preferably 150 to 5000, more preferably 200 to 3000.
This is the thickness of a human being, and this thickness can provide a sufficient protective film against hydrogen.
本発明の方法により、チタン材の表面には酸化皮膜が形
成され、遊離水素を含む廃水等にチタン材から形成され
た設備が接しても酸化皮膜によりチタン材が水素を吸収
することがなく、水素脆化を十分に防止でき、耐食性を
向上できる。By the method of the present invention, an oxide film is formed on the surface of the titanium material, and even if equipment made of the titanium material comes into contact with wastewater containing free hydrogen, the oxide film prevents the titanium material from absorbing hydrogen. Hydrogen embrittlement can be sufficiently prevented and corrosion resistance can be improved.
以下、本発明の実施例を図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図には、チタン材から形成された被処理設備、具体的に
は廃水ストリッパーリフラックスクーラー１０が示され
ている。このクーラー１０には、左右に連通室１１．１
２が形成されるとともに、これらの連通室１ｍ１２間は
、多数、例えば１００本以上のチューブ１３で連結され
ている。これらのチューブ１３の周面には多数のフィン
１４が設けられ、これらのフィン１４のみが放熱性を考
慮してアルミニウム製とされている。また、前記左右の
連通室１１．１２のうちの一方すなわち右方の連通室１
２は仕切壁１５に仕切られて入口室１２Ａと、出口室１
２Ｂとに分割され、この入口室１２Ａには入口配管１６
が、出口室１２Ｂには出口配管１７がそれぞれ連結され
ている。これにより、入口配管１６から供給される廃水
等は、入口室１２Ａから下方のチューブ１３を通って左
方の連通室１１に入り、さらに上方の配管１３を通って
出口室１２Ｂに入り、出口配管１７から排出されるよう
になっている。The figure shows a piece of equipment to be treated, specifically a wastewater stripper reflux cooler 10, made of titanium material. This cooler 10 has communication chambers 11.1 on the left and right sides.
2 are formed, and these communicating chambers 1m12 are connected by a large number, for example, 100 or more tubes 13. A large number of fins 14 are provided on the circumferential surface of these tubes 13, and only these fins 14 are made of aluminum in consideration of heat dissipation. Also, one of the left and right communication chambers 11 and 12, that is, the right communication chamber 1
2 is divided by a partition wall 15 into an entrance chamber 12A and an exit chamber 1.
2B, and this inlet chamber 12A has an inlet pipe 16.
However, outlet pipes 17 are connected to the outlet chambers 12B. As a result, wastewater etc. supplied from the inlet pipe 16 enters the communication chamber 11 on the left side from the inlet chamber 12A through the lower tube 13, further passes through the upper pipe 13 and enters the outlet chamber 12B, and then enters the outlet pipe 12B. It is designed to be discharged from 17.
前記廃水ストリンパ−リフラックスクーラー１０には、
本発明の詭化防止および耐食性向上方法を実施するため
の処理液供給装置２０が連結されている。すなわち、処
理液供給装置２０は、処理水を収納するタンク２１と、
このタンク２１に一端を接続されるとともに途中にポン
プ２２を有し他端を前記入口配管１６に接続された供給
配管２３と、一端を前記出口配管１７に接続されるとと
もに他端をタンク２１内に開口された戻り配管２４と、
タンク２１内の処理液を所定温度に加熱する加熱手段と
してのスチームコイル２５と、タンク２１内に過酸化水
素水（ＨｚＯｚ）を供給する過酸化水素水供給配管２６
とから構成されている。この処理液供給装置２０を構成
するタンク２１、ポンプ２２）供給配管２３、戻り配管
２４、スチームコイル２５および過酸化水素水供給配管
２６等、処理水に接する箇所は、全てオーステナイト系
ステンレスＭ （５０３３０４以上）とされ、過酸化水
素によるチタン材に先立つ酸化をなされないようにされ
ている。また、ポンプ２２の容量は、クーラー１０のチ
ューブ１３内における処理水の流速が適宜な値となり、
処理時間が短縮できるに十分な容量とする。この際、流
速が速ければ処理時間は短くなる。The wastewater stripper-reflux cooler 10 includes:
A processing liquid supply device 20 for carrying out the method for preventing scouring and improving corrosion resistance of the present invention is connected. That is, the treatment liquid supply device 20 includes a tank 21 that stores treated water,
A supply pipe 23 is connected at one end to the tank 21 and has a pump 22 in the middle, and the other end is connected to the inlet pipe 16, and one end is connected to the outlet pipe 17 and the other end is inside the tank 21. a return pipe 24 opened to;
A steam coil 25 as a heating means for heating the processing liquid in the tank 21 to a predetermined temperature, and a hydrogen peroxide water supply pipe 26 that supplies hydrogen peroxide water (HzOz) into the tank 21.
It is composed of. The tank 21, pump 22, supply piping 23, return piping 24, steam coil 25, hydrogen peroxide water supply piping 26, etc. that make up this treatment liquid supply device 20, and other parts that come into contact with the treated water, are all made of austenitic stainless steel M (503304 (above)), and the titanium material is prevented from being oxidized by hydrogen peroxide. In addition, the capacity of the pump 22 is such that the flow rate of the treated water in the tube 13 of the cooler 10 is an appropriate value.
The capacity should be sufficient to shorten processing time. At this time, the faster the flow rate, the shorter the processing time.
前記処理液供給装置２０のタンク２１内には、必要に応
じてチタン材からなるテストピース３０が吊り下げられ
、処理水によるクーラー１０の酸化度合いを簡易にチェ
ックできるようになっている。A test piece 30 made of titanium is suspended in the tank 21 of the treatment liquid supply device 20 as required, so that the degree of oxidation of the cooler 10 by the treatment water can be easily checked.
次に本実施例の操作手順を説明する。Next, the operating procedure of this embodiment will be explained.
被処理設備である廃水ストリッパーリフラックスクーラ
ー１０の上面をシートで覆い、処理作業中の熱の放散を
防止する。次いで、タンク２１内に純水またはａｐｗ
（ボイラー給水）を張り込み、スチームコイル２５に
スチームを通して９０°Ｃ以上に加温する。この加温の
開始と同時にポンプ２２を始動して供給配管２３を介し
てクーラー１０内に温水を導入する。この温水は戻り配
管２４を介してタンク２１に循環する。The upper surface of the wastewater stripper reflux cooler 10, which is the equipment to be treated, is covered with a sheet to prevent heat dissipation during treatment work. Next, pure water or apw is added to the tank 21.
(boiler feed water) and heat it to 90°C or higher by passing steam through the steam coil 25. Simultaneously with the start of this heating, the pump 22 is started to introduce hot water into the cooler 10 via the supply pipe 23. This hot water is circulated to the tank 21 via the return pipe 24.
このようにして温水を循環させることにより、クーラー
１０が加熱され、タンク２１への戻り配管２４からの純
水温度が８５〜９０″Ｃ以上で、過酸化水素水供給配管
２６から過酸化水素水を供給して過酸化水素水の濃度が
ｏ、ｔｗｔｚ以上、好ましくは０．５〜５．０Ｗｔχに
なるようにし、循環を継続する。By circulating hot water in this way, the cooler 10 is heated, and when the temperature of the pure water from the return pipe 24 to the tank 21 is 85 to 90"C or higher, the hydrogen peroxide water is supplied from the hydrogen peroxide water supply pipe 26. is supplied so that the concentration of the hydrogen peroxide solution becomes 0.twtz or more, preferably 0.5 to 5.0 Wtχ, and the circulation is continued.
この純水中の過酸化水素水の濃度は、２時間毎にチェッ
クし、分解により不足した分を補給する。The concentration of hydrogen peroxide in this pure water is checked every two hours, and the amount that is insufficient due to decomposition is replenished.
この循環中、クーラー１０の連通室１１等に設けられた
エアーベント（図示せず）を微開しておき、適宜エアー
抜きを行う。During this circulation, air vents (not shown) provided in the communication chamber 11 and the like of the cooler 10 are slightly opened to bleed air as appropriate.
過酸化水素水の導入後、所定時間、例えば丸３日間（７
２時間）４環を継続してチタン材の酸化処理を終了する
。この際、循環継続時間は、タンク２１中に吊り下げた
テストピース３０や、図示しないが連通室１１．１２に
配置されたテストピースの色相を目視判断し、予め定め
た基準片の色相になったら酸化処理を終了する。この酸
化処理によりチタン材の表面に形成される酸化皮膜の膜
厚は、５０Å以上、好ましくは１５０〜５０００人、さ
らに好ましくは２００〜３０００人であり、このときの
色相は赤紫ないし灰色である。After introducing the hydrogen peroxide solution, wait for a predetermined period of time, for example, 3 days (7 days).
2 hours) Continue 4 rings to complete the oxidation treatment of the titanium material. At this time, the circulation duration time is determined by visually judging the hue of the test piece 30 suspended in the tank 21 or the test piece placed in the communication chamber 11. When this happens, the oxidation treatment is finished. The thickness of the oxide film formed on the surface of the titanium material by this oxidation treatment is 50 Å or more, preferably 150 to 5000, more preferably 200 to 3000, and the hue is reddish-purple to gray. .
酸化処理が完了したら、処理水の全量をクーラー１０か
らドレンアウトし、この後純水またはＢＰ−にて洗浄す
る。この洗浄は、純水を循環させることなく一方向に流
しくワンスルーで）、約１時間水洗するか、あるいは、
未使用（フレッシュ）の純水でクーラー１０を満水にし
た後ドレンアウトし、これを２回繰り返すかのいずれか
により行う、このときの純水温度は、常温でよい。When the oxidation treatment is completed, the entire amount of treated water is drained out from the cooler 10, and then washed with pure water or BP-. This cleaning is a one-through process in which pure water flows in one direction without circulation), or rinsed with water for about an hour, or
This is done either by filling the cooler 10 with unused (fresh) pure water and then draining it, and repeating this process twice.The temperature of the pure water at this time may be room temperature.
前述のような本実施例によれば、チタン材からなる廃水
ストリッパーリフラックスクーラー１０に酸化皮膜を形
成したから、遊離水素を含有する廃水等を処理しても、
チタン材の水素吸収による脆化を発生することがなく、
かつ、耐食性を向上できる。また、酸化処理を行う処理
液供給装置２０も簡易な構成で安価に作成でき、かつ、
既設設備にも適用可能であるという効果がある。さらに
、処理液としては、過酸化水素水を含む水であるから、
従来の塩酸、硝酸等を用いる方法に比べて廃液処理も不
要にでき、この点からも処理コストを安価にできる。ま
た、循環水を用いるから、クーラー１０の酸化皮膜を全
体に均一にでき、必要な膜厚を得るまでの処理時間を短
くできる。さらに、処理水の温度は、１００″Ｃ以下の
温度とされているから、キャビテーションの発生のおそ
れもなく、かつ、処理液供給装置２０が加圧設備となる
ことがなく、この点からも安価に提供できる。According to this embodiment as described above, since an oxide film is formed on the wastewater stripper reflux cooler 10 made of titanium material, even if wastewater containing free hydrogen is treated,
No embrittlement due to hydrogen absorption of titanium material,
Moreover, corrosion resistance can be improved. Further, the processing liquid supply device 20 for performing oxidation processing can be manufactured at low cost with a simple configuration, and
It has the effect of being applicable to existing equipment. Furthermore, since the treatment liquid is water containing hydrogen peroxide,
Compared to conventional methods using hydrochloric acid, nitric acid, etc., waste liquid treatment is not necessary, and from this point of view, the treatment cost can be reduced. Furthermore, since circulating water is used, the oxide film on the cooler 10 can be made uniform over the entire surface, and the processing time required to obtain the required film thickness can be shortened. Furthermore, since the temperature of the treated water is set to 100"C or less, there is no fear of cavitation occurring, and the treated liquid supply device 20 does not become a pressurizing equipment, and from this point of view it is also inexpensive. can be provided to
なお、本発明の実施にあたり、過酸化水素水を含む処理
水は、前記実施例のように必ずしも循環させる必要はな
く、静止状態で所定時間浸漬するものでもよいが、設備
の各部における酸化皮膜の形成状態が異なる可能性があ
って、設備全体に必要な膜厚の酸化皮膜を形成するまで
の時間に長時間を要することもあり、前記実施例の方が
有利である。また、処理水の加熱手段は、前記実施例の
ようにスチームコイル２５によるものに限らず、電気的
なヒータ、あるいは処理水中に直接スチームを吹き込む
ものであってもよい、この際、直接スチームを吹き込む
場合には、処理水が増加してタンク２１から溢れる可能
性があるため、戻り配管２４にドレーン配管を設ける等
して適宜排出する。さらに、処理水の加熱は、処理水中
に直接加熱手段を入れるものに限らず、小型の設備等に
あっては、装置全体を加熱するものであってもよい。In carrying out the present invention, the treated water containing hydrogen peroxide solution does not necessarily have to be circulated as in the above embodiment, and may be immersed in a stationary state for a predetermined period of time. The formation conditions may be different, and it may take a long time to form an oxide film of the required thickness over the entire equipment, so the above embodiment is more advantageous. Further, the means for heating the treated water is not limited to the steam coil 25 as in the above embodiment, but may also be an electric heater or a means for directly blowing steam into the treated water. If the treated water is blown in, there is a possibility that the treated water will increase and overflow from the tank 21, so the return pipe 24 may be provided with a drain pipe or the like to discharge it as appropriate. Furthermore, the heating of the treated water is not limited to directly inserting a heating means into the treated water, and in the case of small-sized equipment, the entire apparatus may be heated.
また、本発明は、被処理設備として廃水ストリッパーリ
フラックスクーラー１０のような廃水処理設備に限定さ
れるものではなく、遊離水素に曝されて水素脆性を生じ
るようなチタン材から形成されたあらゆる設備に通用で
きる。また、処理液供給装置２０の接液部の材質は、必
ずしも前記オーステナイト系ステンレス鋼に限定される
ものではなく、フェライト系ステンレス鋼、マルテンサ
イト系ステンレス鋼等の他、過酸化水素水による酸化を
受けない材質、例えばプラスチック等でもよい。Furthermore, the present invention is not limited to wastewater treatment equipment such as the wastewater stripper reflux cooler 10 as equipment to be treated, but can be applied to any equipment made of titanium material that becomes hydrogen brittle when exposed to free hydrogen. It can be applied to Furthermore, the material of the liquid-contacting part of the processing liquid supply device 20 is not necessarily limited to the austenitic stainless steel described above, but may also include ferritic stainless steel, martensitic stainless steel, etc. It may be made of a material that does not receive the material, such as plastic.
本発明によれば、チタン材から形成された設備の水素に
よる脆化をを効に防止できるとともに、耐食性を向上で
き、かつ、その処理設備、取り扱い等も簡易であるとい
う効果がある。According to the present invention, it is possible to effectively prevent hydrogen-induced embrittlement of equipment made of titanium material, improve corrosion resistance, and simplify processing equipment, handling, etc.
図は本発明の方法を実施する設備の一例を示す概略構成
図である。
１０・・・被処理設備としての廃水ストリッパーリフラ
ックスクーラー、１１．１２・・・連通室、１２Ａ・・
・入口室、１２Ｂ・・・出口室、１３・・・チューブ、
１４・・・フィン、１５・・・仕切壁、１６・・・入口
配管、１７・・・出口配管、２０・・・処理液供給装置
、２１・・・タンク、２２・・・ポンプ、２３・・・供
給配管、２４・・・戻り配管、２５・・・スチームコイ
ル、２６・・・過酸化水素水供給配管、３ｏ・・・テス
トピース。The figure is a schematic configuration diagram showing an example of equipment for implementing the method of the present invention. 10... Wastewater stripper reflux cooler as equipment to be treated, 11.12... Communication chamber, 12A...
・Entrance chamber, 12B... Outlet chamber, 13... Tube,
DESCRIPTION OF SYMBOLS 14... Fin, 15... Partition wall, 16... Inlet piping, 17... Outlet piping, 20... Processing liquid supply device, 21... Tank, 22... Pump, 23... ... Supply piping, 24... Return piping, 25... Steam coil, 26... Hydrogen peroxide water supply piping, 3o... Test piece.
Claims (4)
材から形成された被処理設備を５０℃以上の温度で接触
させて所定時間保持し、チタン材の表面に５０Å以上の
酸化皮膜を形成した後洗浄処理することを特徴とするチ
タン材設備の詭化防止および耐食性向上方法。(1) The equipment to be treated made of titanium material is brought into contact with water containing 0.1 wt% or more of hydrogen peroxide at a temperature of 50°C or more and maintained for a predetermined period of time to form an oxide film of 50 Å or more on the surface of the titanium material. A method for preventing deterioration and improving corrosion resistance of titanium equipment, the method comprising cleaning after forming a titanium material.
水を含む温水は循環水とされるとともに、この循環水が
接触する被処理設備以外のタンク、配管、ポンプ等の処
理液供給装置は、オーステナイト系ステンレス鋼、フェ
ライト系ステンレス鋼、マルテンサイト系ステンレス鋼
等により製作されていることを特徴とするチタン材設備
の詭化防止および耐食性向上方法。(2) In claim 1, the hot water containing the hydrogen peroxide solution is used as circulating water, and processing liquid supply equipment such as tanks, piping, pumps, etc. other than the equipment to be treated with which this circulating water comes into contact This is a method for preventing deception and improving corrosion resistance of titanium equipment, characterized in that it is manufactured from austenitic stainless steel, ferritic stainless steel, martensitic stainless steel, etc.
処理設備の加温温度および温水の温度は、５０〜１００
℃の範囲とされることを特徴とするチタン材設備の詭化
防止および耐食性向上方法。(3) In claim 1 or 2, the heating temperature of the equipment to be treated and the temperature of the hot water are 50 to 100.
A method for preventing deception and improving corrosion resistance of titanium equipment, characterized in that the temperature range is within the range of ℃.
おいて、前記酸化皮膜の厚さが１５０〜５０００Åの範
囲となるように保持時間が設定されていることを特徴と
するチタン材設備の詭化防止および耐食性向上方法。(4) The titanium material equipment according to any one of claims 1 to 3, wherein the holding time is set so that the thickness of the oxide film is in the range of 150 to 5000 Å. A method for preventing spoofing and improving corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5768887A JPS63223187A (en) | 1987-03-11 | 1987-03-11 | Method for preventing embrittlement of titanium material equipment and improving corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5768887A JPS63223187A (en) | 1987-03-11 | 1987-03-11 | Method for preventing embrittlement of titanium material equipment and improving corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63223187A true JPS63223187A (en) | 1988-09-16 |
Family
ID=13062883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5768887A Pending JPS63223187A (en) | 1987-03-11 | 1987-03-11 | Method for preventing embrittlement of titanium material equipment and improving corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63223187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007099805A1 (en) * | 2006-03-02 | 2007-09-07 | Idemitsu Kosan Co., Ltd. | Method of forming titanium oxide coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920706A (en) * | 1972-06-19 | 1974-02-23 | ||
| JPS56166378A (en) * | 1980-04-24 | 1981-12-21 | British Eaasupeisu Paburitsuku | Treatment of titanium or titanium alloy article |
-
1987
- 1987-03-11 JP JP5768887A patent/JPS63223187A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4920706A (en) * | 1972-06-19 | 1974-02-23 | ||
| JPS56166378A (en) * | 1980-04-24 | 1981-12-21 | British Eaasupeisu Paburitsuku | Treatment of titanium or titanium alloy article |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007099805A1 (en) * | 2006-03-02 | 2007-09-07 | Idemitsu Kosan Co., Ltd. | Method of forming titanium oxide coating |
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