JPH01296094A - Heat transfer steel tube for heat exchanger, whose inner surface is coated with corrosion-resistant film - Google Patents
Heat transfer steel tube for heat exchanger, whose inner surface is coated with corrosion-resistant filmInfo
- Publication number
- JPH01296094A JPH01296094A JP12183888A JP12183888A JPH01296094A JP H01296094 A JPH01296094 A JP H01296094A JP 12183888 A JP12183888 A JP 12183888A JP 12183888 A JP12183888 A JP 12183888A JP H01296094 A JPH01296094 A JP H01296094A
- Authority
- JP
- Japan
- Prior art keywords
- heat transfer
- corrosion
- transfer steel
- steel tube
- paint
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は河川水を冷却水とする熱交換器用内面防食塗装
皮膜付伝熱鋼管に関するもので、特に管内面塗装皮膜の
密着性を改善し、熱交換器の寿命を増大するものである
。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat transfer steel pipe with an inner surface anti-corrosion coating for use in a heat exchanger using river water as cooling water, and in particular, to improve the adhesion of the inner surface coating of the tube. , which increases the life of the heat exchanger.
一般に火力発電所、原子力発電所、化学工場。 Generally thermal power plants, nuclear power plants, chemical factories.
船舶あるいはその他の各種用途に用いられる熱交換器に
は、伝熱管として炭素鋼管や特殊鋼管が使用されている
。我国ではこのような熱交換器の冷却水に主として工業
用水が用いられる場合が多いため、伝熱鋼管には種々の
腐食が発生する。例えば使用する冷却水に固形異物が混
入する場合には潰食が発生し易くなる。また工業用水が
汚染されていたり、用水槽の底に堆積したイオウイオン
を含む汚泥をまき込む場合には、汚染腐食が発生する。Carbon steel pipes and special steel pipes are used as heat transfer tubes in heat exchangers used in ships and other various applications. In Japan, industrial water is often used as the cooling water for such heat exchangers, which causes various types of corrosion to occur in heat transfer steel pipes. For example, if solid foreign matter is mixed into the cooling water used, erosion is likely to occur. Contamination corrosion also occurs when industrial water is contaminated or when sludge containing sulfur ions deposited at the bottom of an industrial water tank is mixed in.
（発明が解決しようとする課題）
管内面に塗装皮膜を設けることにより、潰食や汚染腐等
を抑制することが可能であるが、冷却水に混入する固形
異物が鋭利なものであると、固形異物により塗装皮膜が
擦傷し、その部分を起点として塗装皮膜が剥離したり、
塗装皮膜の密着性を損なう場合がある。(Problems to be Solved by the Invention) Providing a coating film on the inner surface of the pipe can suppress corrosion, contamination and rot, etc. However, if the solid foreign matter mixed into the cooling water is sharp, The paint film may be scratched by a solid foreign object, and the paint film may peel off from that area.
It may impair the adhesion of the paint film.
〔課題を解決するための手段および作用〕本発明はこれ
に鑑み種々検討の結果、河川水などを冷却水とする熱交
換器用伝熱鋼管の内面塗装皮膜の密着性を改善し、熱交
換器の寿命を増大することができる熱交換器用内面防食
塗装皮膜付伝熱鋼管を開発したもので、熱交換器用伝熱
鋼管の内面に、腐食抑制剤を添加した塗料の塗装皮膜を
設けたことを特徴とするものである。[Means and effects for solving the problem] In view of the above, as a result of various studies, the present invention improves the adhesion of the inner coating film of heat transfer steel pipes for heat exchangers that use river water as cooling water, and We have developed a heat transfer steel tube with an inner surface anti-corrosion coating for heat exchangers that can extend the life of the heat exchanger. This is a characteristic feature.
即ち本発明は熱交換器用伝熱鋼管の内面に、腐食抑制剤
を添加した塗料を塗装することにより、伝熱鋼管の塗膜
の密着性を改善し、伝熱鋼管の耐食性を向上したもので
ある。That is, the present invention improves the adhesion of the coating film of the heat transfer steel tube and improves the corrosion resistance of the heat transfer steel tube by coating the inner surface of the heat transfer steel tube for a heat exchanger with a paint containing a corrosion inhibitor. be.
腐食抑制剤としてはベンゾトリアゾール、トリルトリア
ゾール、２−メルカプトベンゾチアゾール、２・５−ジ
メルカプトチアジアゾール。Corrosion inhibitors include benzotriazole, tolyltriazole, 2-mercaptobenzothiazole, and 2,5-dimercaptothiadiazole.
２メチルカプトベンズイミダゾール、ベンズイミダゾー
ルチオール、ベンズオキサゾールチオール、メチルベン
ゾチアゾール、メルカプトチアゾリン、５ニトロベンズ
イミダゾール、ジチオカルバミン菌、１・３・５−トリ
アジン２・４−ジチオールの何れか１種又は２種以上を
用いる。Any one or more of 2-methylcaptobenzimidazole, benzimidazole thiol, benzoxazole thiol, methylbenzothiazole, mercaptothiazoline, 5-nitrobenzimidazole, dithiocarbamic bacteria, 1,3,5-triazine 2,4-dithiol Use.
また塗料には、アルキッド樹脂系塗料、エポキシ樹脂系
塗料、フッ素樹脂系塗料、ポリウレタン樹脂系塗料、ビ
ニール樹脂系塗料、アクリル樹脂系塗料、シリコン樹脂
系塗料の何れか１種を用いる。As the paint, any one of alkyd resin paint, epoxy resin paint, fluororesin paint, polyurethane resin paint, vinyl resin paint, acrylic resin paint, and silicone resin paint is used.
鉛丹及びジンククロメートを含まないアルキッド樹脂系
塗料を用い、これにメチルアルコールに溶かしたベンゾ
トリアゾールを１％添加し、均一に混合した後、熱交換
器用伝熱炭素鋼管（ＪＩＳ Ｇ３４６１５ＴＢ３５ ）
の内面に膜厚２０μ瓦の目標でスプレー塗装した。Using an alkyd resin paint that does not contain red lead or zinc chromate, add 1% benzotriazole dissolved in methyl alcohol to it, mix uniformly, and then create heat transfer carbon steel pipes for heat exchangers (JIS G34615TB35).
The inner surface of the roof tiles was spray-painted with a target thickness of 20μ.
このようにして得られた内面防食塗膜付伝熱鋼管の内面
塗装皮膜にナイフで疵をつけ、金属地肌を露出せしめた
俊、底部に３容量％の空気を含む工業用水を流速１２ｍ
／ｓｅｃで衝突させるＢＮＦジェット試験を３０日間実
施した。The inner surface coating film of the heat transfer steel tube with the inner surface anti-corrosion coating thus obtained was scratched with a knife to expose the metal surface.
A BNF jet test was conducted for 30 days in which the jet was collided at a speed of /sec.
その結果ベンゾトリアゾールを含まない場合には、庇部
を起点として塗装皮膜が剥離したが、ベンゾトリアゾー
ルを添加した場合には塗装皮膜の剥離は認められず、密
着性が著しく改善されていることが認められた。As a result, when benzotriazole was not included, the paint film peeled starting from the eaves, but when benzotriazole was added, no peeling of the paint film was observed, indicating that the adhesion was significantly improved. Admitted.
尚アルキッド樹脂系に代えてエポキシ樹脂系。In addition, epoxy resin is used instead of alkyd resin.
フッ素樹脂系、ポリウレタン樹脂系、ビニール樹脂系、
アクリル樹脂系及びシリコン樹脂系の塗料を用いて同様
の試験を行なったところ、同様の改善効果が認められた
。またベンゾトリアゾールに代えてトリルトリアゾール
、２−メルカプトベンゾチアゾール、２・５〜ジメルカ
プトチアゾール、２メチルカプトベンズイミダゾール、
ベンズイミダゾールチオール、ベンズオキサゾールチオ
ール、メチルベンゾチアゾール。Fluorine resin, polyurethane resin, vinyl resin,
When similar tests were conducted using acrylic resin-based and silicone resin-based paints, similar improvement effects were observed. Also, instead of benzotriazole, tolyltriazole, 2-mercaptobenzothiazole, 2,5-dimercaptothiazole, 2methylcaptobenzimidazole,
Benzimidazole thiol, benzoxazole thiol, methylbenzothiazole.
メルカプトチアゾリン、５ニトロベンズイミダゾール、
ジチオカルバミン酸、１・３・５−トリアジン２・４−
ジチオールを用いて同様の試験を行なったところ、同様
の改善効果が認められた。Mercaptothiazoline, 5-nitrobenzimidazole,
Dithiocarbamic acid, 1,3,5-triazine 2,4-
When a similar test was conducted using dithiol, a similar improvement effect was observed.
このように本発明によれば、内面防食塗装皮膜付伝熱鋼
管の塗装皮膜の密着性が改善され、伝熱鋼管としての寿
命を著しく向上することができる等、工業上顕著な効果
を奏するものである。As described above, according to the present invention, the adhesion of the coating film of the heat transfer steel pipe with the inner surface anticorrosive coating is improved, and the life of the heat transfer steel pipe can be significantly extended, which brings about remarkable industrial effects. It is.
Claims (3)
した塗料の塗装皮膜を設けたことを特徴とする熱交換器
用内面防食塗装皮膜付伝熱鋼管。(1) A heat transfer steel pipe for a heat exchanger with an inner surface anti-corrosion coating, characterized in that a coating film of a paint containing a corrosion inhibitor is provided on the inner surface of the heat transfer steel pipe for a heat exchanger.
リアゾール、２−メルカプトベンゾチアゾール、２・５
−ジメルカプトチアジアゾール、２メチルカプトベンズ
イミダゾール、ベンズイミダゾールチオール、ベンズオ
キサゾールチオール、メチルベンゾチアゾール、メルカ
プトチアゾリン、５ニトロベンズイミダゾール、ジチオ
カルバミン酸、１・３・５−トリアジン２・４−ジチオ
ールの何れか１種又は２種以上を用いる請求項１記載の
熱交換器用内面防食塗装皮膜付伝熱鋼管。(2) Benzotriazole, tolyltriazole, 2-mercaptobenzothiazole, 2.5 as a corrosion inhibitor
- Any one of dimercaptothiadiazole, 2-methylcaptobenzimidazole, benzimidazole thiol, benzoxazole thiol, methylbenzothiazole, mercaptothiazoline, 5-nitrobenzimidazole, dithiocarbamic acid, 1,3,5-triazine 2,4-dithiol 2. The heat transfer steel tube for heat exchangers with an inner surface anti-corrosion coating according to claim 1, wherein one or more types are used.
系塗料、フッ素樹脂系塗料、ポリウレタン樹脂系塗料、
ビニール樹脂系塗料、アクリル樹脂系塗料、シリコン樹
脂系塗料の何れか１種を用いる請求項１又は２記載の熱
交換器用内面防食塗装皮膜付伝熱鋼管。(3) As paints, alkyd resin paints, epoxy resin paints, fluororesin paints, polyurethane resin paints,
3. The heat transfer steel tube with an inner surface anti-corrosion coating for a heat exchanger according to claim 1 or 2, wherein any one of a vinyl resin paint, an acrylic resin paint, and a silicone resin paint is used.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12183888A JPH01296094A (en) | 1988-08-17 | 1988-05-20 | Heat transfer steel tube for heat exchanger, whose inner surface is coated with corrosion-resistant film |
| US07/406,969 US4922171A (en) | 1988-08-17 | 1989-09-13 | Motor actuator with air-mix door opening-limiter and built-in switching unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12183888A JPH01296094A (en) | 1988-08-17 | 1988-05-20 | Heat transfer steel tube for heat exchanger, whose inner surface is coated with corrosion-resistant film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01296094A true JPH01296094A (en) | 1989-11-29 |
Family
ID=14821184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12183888A Pending JPH01296094A (en) | 1988-08-17 | 1988-05-20 | Heat transfer steel tube for heat exchanger, whose inner surface is coated with corrosion-resistant film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01296094A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184478A (en) * | 1990-08-27 | 1993-02-09 | Nippondenso Co., Ltd. | Refrigerant apparatus |
| US5762131A (en) * | 1993-09-03 | 1998-06-09 | Kabushiki Kaisha Sekuto Kagaku | Heat radiating board and method for cooling by using the same |
-
1988
- 1988-05-20 JP JP12183888A patent/JPH01296094A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5184478A (en) * | 1990-08-27 | 1993-02-09 | Nippondenso Co., Ltd. | Refrigerant apparatus |
| US5762131A (en) * | 1993-09-03 | 1998-06-09 | Kabushiki Kaisha Sekuto Kagaku | Heat radiating board and method for cooling by using the same |
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