JPH0472420A - Engine cooling pipe - Google Patents
Engine cooling pipeInfo
- Publication number
- JPH0472420A JPH0472420A JP18294790A JP18294790A JPH0472420A JP H0472420 A JPH0472420 A JP H0472420A JP 18294790 A JP18294790 A JP 18294790A JP 18294790 A JP18294790 A JP 18294790A JP H0472420 A JPH0472420 A JP H0472420A
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- engine cooling
- cooling pipe
- pipe
- polyolefine
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 20
- 239000011247 coating layer Substances 0.000 claims abstract description 19
- 229920000098 polyolefin Polymers 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000006866 deterioration Effects 0.000 abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000004743 Polypropylene Substances 0.000 abstract description 3
- -1 polypropylene Polymers 0.000 abstract description 3
- 229920001155 polypropylene Polymers 0.000 abstract description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 abstract 1
- 229910000077 silane Inorganic materials 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000004718 silane crosslinked polyethylene Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- NDKWCCLKSWNDBG-UHFFFAOYSA-N zinc;dioxido(dioxo)chromium Chemical compound [Zn+2].[O-][Cr]([O-])(=O)=O NDKWCCLKSWNDBG-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/04—Arrangements of liquid pipes or hoses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/06—Cleaning; Combating corrosion
- F01P2011/066—Combating corrosion
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は金属製エンジン冷却管に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to metal engine cooling pipes.
［従来の技術］
たとえば自動車などのエンジン冷却機構の一つとして、
ロング・ライフ・クーラント（以下、ＬＬＣという）な
どを含むいわゆる冷却水を配管を用いて循環させ、循環
系路中のラジェータより放熱するシステムがある。[Prior art] For example, as one of the engine cooling mechanisms of automobiles,
There is a system in which so-called cooling water containing long life coolant (hereinafter referred to as LLC) is circulated using piping, and heat is radiated from a radiator in the circulation path.
前記システムに用いる配管、すなわちエンジン冷却管と
しては、一般に、第３図に示されるような内面には処理
が施されていないメツキ鋼管などが用いられている。な
お、第３図は第２図に示されるようなエンジン冷却管（
４）の（＾）−（＾）断面に対応する断面図であり、鋼
管などの金属製管（２に亜鉛メツキとクロメート（クロ
ム酸塩）処理とによる外表面（３）が形成されている。As the piping used in the system, that is, the engine cooling pipe, generally a plated steel pipe whose inner surface is not treated as shown in FIG. 3 is used. Note that Figure 3 shows the engine cooling pipe (as shown in Figure 2).
It is a cross-sectional view corresponding to the (^)-(^) cross section of 4), and is a metal pipe such as a steel pipe (2 has an outer surface (3) formed by galvanizing and chromate treatment). .
このため、たとえば前記ＬＬＣに防錆剤が配合されてい
ても使用条件によっては錆びるという問題がある。また
、最近ではエンジンの高性能化に伴ない、冷却効率向上
のための冷却水流高速化の傾向があり、これによる冷却
管曲り部の孔食などが問題となりつつある。For this reason, there is a problem that, for example, even if the LLC contains a rust preventive agent, it may rust depending on the conditions of use. Furthermore, in recent years, as engines have improved in performance, there has been a trend toward faster cooling water flow to improve cooling efficiency, and this has led to problems such as pitting corrosion at bent portions of cooling pipes.
このような問題に対応しつる改善案としては、（ａ）内
面にダクロ処理などの焼付型亜鉛クロム酸皮膜処理を施
す、市ステンレス鋼などの耐食性材料製配管を用いる、
（Ｃ）その他の一般的な内面被覆管（たとえば実開昭６
２−１７４１９３号公報参照）を用いる、などが考えら
れる。In order to address these problems, some improvement plans include (a) using piping made of corrosion-resistant materials such as city stainless steel, applying baked-on zinc chromate film treatment such as dacro treatment to the inner surface;
(C) Other general internally coated tubes (for example,
2-174193)).
しかしながら、前記改善案（ａ）の処理層は密着性に難
点があり、ばあいによっては剥れおちるおそれがあり、
前記改善案中）は材料費が高いばかりでなく加工か困難
で作業能率が低下する。However, the treated layer of the improvement plan (a) has a problem with adhesion and may peel off in some cases.
The above-mentioned improvement plan) not only requires high material costs but also is difficult to process, reducing work efficiency.
また、前記改善案（Ｃ）において通常用いられるエポキ
シ樹脂、ポリウレタン樹脂、フェノール樹脂などの被覆
層は高温（１００〜１４０℃）のＬＬＣを含む水などに
より劣化（加水分解など）しやすく、密着性および耐熱
性か低く、また素材の伸びが小さいことからコーテイン
グ後の曲げ加工がしにくいなどの点でも満足できるもの
ではない。In addition, the coating layer of epoxy resin, polyurethane resin, phenol resin, etc. commonly used in the improvement plan (C) is easily deteriorated (hydrolyzed, etc.) by water containing LLC at high temperatures (100 to 140°C), and the adhesion is poor. Moreover, it is not satisfactory in terms of low heat resistance and low elongation of the material, making it difficult to bend after coating.
［発明が解決しようとする課題］
本発明はＬＬＣなどによって劣化（加水分解など）しに
＜＜、管内壁との密着性がよく、高い耐熱性を有するコ
ーティング層を内面に備えた、経済的で、加工性の良好
なエンジン冷却管を提供することを目的とする。[Problems to be Solved by the Invention] The present invention provides an economical pipe with a coating layer on the inner surface that is resistant to deterioration (hydrolysis, etc.) due to LLC, etc., has good adhesion to the inner wall of the pipe, and has high heat resistance. The purpose is to provide an engine cooling pipe with good workability.
［課題を解決するための手段］
本発明は金属製管の内面にＳｉ含有架橋ポリオレフィン
からなるコーティング層を有するエンジン冷却管に関す
る。[Means for Solving the Problems] The present invention relates to an engine cooling pipe having a coating layer made of Si-containing crosslinked polyolefin on the inner surface of the metal pipe.
［作 用コ
前記Ｓｉ含有架橋ポリオレフィンからなるコーティング
層は、ポリオレフィンであるためＬＬＣなどによって加
水分解などの劣化を生じにくく、また、Ｓｉ含有のため
鋼管との密着性が良好であり、さらに、Ｓｊによる架橋
により耐熱性が高い。[Function] Since the coating layer made of the Si-containing crosslinked polyolefin is a polyolefin, it is difficult to cause deterioration such as hydrolysis due to LLC, etc., and since it contains Si, it has good adhesion with steel pipes. High heat resistance due to crosslinking.
したがって、コーティング層の劣化や密着不良によって
鋼管などの金属製管内面とコーティング層とのあいたに
侵入した水によって鋼などの金属が腐食することが防止
される。Therefore, metals such as steel are prevented from being corroded by water that enters the gap between the inner surface of a metal pipe such as a steel pipe and the coating layer due to deterioration or poor adhesion of the coating layer.
さらに、管材は鋼管などの通常の材料であり、コーティ
ング層形成前に行うその曲げ加工などにおける加工性も
良好である。また、Ｓｉ含有架橋ポリオレフィンは伸び
か良好なことからコーテイング後の曲げ加工にも耐える
ことができる。Furthermore, the tube material is a common material such as a steel tube, and has good workability in bending and the like performed before forming the coating layer. Further, since Si-containing crosslinked polyolefin has good elongation, it can withstand bending after coating.
また、安価な管材を用いることかできるので経済的であ
る。Furthermore, it is economical because inexpensive pipe materials can be used.
［実施例］
つぎに、本発明のエンジン冷却管を図面に基づいて説明
する。[Example] Next, the engine cooling pipe of the present invention will be explained based on the drawings.
第１図は本発明のエンジン冷却管の一例を示す断面図で
あり、第２図のエンジン冷却管（４）における（Ａ）−
（Ａ）断面に対応する断面を示している。FIG. 1 is a sectional view showing an example of the engine cooling pipe of the present invention, and (A)--
(A) shows a cross section corresponding to the cross section.
第１図に示されるように、本発明のエンジン冷却管（４
）においては金属製管（２１の内面に８１含有架橋ポリ
オレフインからなるコーティング層（１）が形成されて
いる。なお、（３）は第３図のばあいと同様の外表面で
ある。As shown in FIG. 1, the engine cooling pipe (4
), a coating layer (1) made of 81-containing crosslinked polyolefin is formed on the inner surface of a metal tube (21). Note that (3) is the outer surface similar to that in FIG. 3.
前記Ｓｉ含有架橋ポリオレフィンとしては、シラン架橋
ポリエチレンやポリプロピレンなどが用いられる。なお
、市販されている商品名としては「リンクロン」 （三
菱油化■製）などがあげられる。As the Si-containing crosslinked polyolefin, silane crosslinked polyethylene, polypropylene, etc. are used. Commercially available product names include ``Linkron'' (manufactured by Mitsubishi Yuka).
このようなＳ１含有架橋ポリオレフインのなかでは、前
記ポリプロピレンが、熱間強度が高い点で好ましい。Among such S1-containing crosslinked polyolefins, the polypropylene is preferred because it has high hot strength.
金属製管の内面にＳｉ含有架橋ポリオレフィンからなる
コーティング層を形成する方法にはとくに限定はなく、
種々の方法を用いることができる。かかる方法の具体例
としては、加熱した鋼管などに粉体の８１含有架橋ポリ
オレフインを通しコーティングする方法、押出し成形し
たＳ１含有架橋ポリオレフインを鋼管などに挿入し加熱
コーティングする方法などがあげられる。There are no particular limitations on the method of forming a coating layer made of Si-containing crosslinked polyolefin on the inner surface of a metal tube.
Various methods can be used. Specific examples of such methods include a method in which a heated steel pipe or the like is passed through and coated with 81-containing crosslinked polyolefin powder, and an extruded S1-containing crosslinked polyolefin is inserted into a steel pipe or the like and heated and coated.
前記コーティング層の厚さとしては１５μ〜２．０■■
が好ましい。前記範囲未満のばあいは均一なコーティン
グ層かえられにくく、ピンホールを発生するおそれがあ
り、前記範囲をこえるばあいには管の放熱性の低下、接
合部の内面段差の糟大による冷却水の流れの悪化をまね
く傾向となる。The thickness of the coating layer is 15μ to 2.0■■
is preferred. If it is less than the above range, it will be difficult to change a uniform coating layer and there is a risk of pinholes occurring, and if it exceeds the above range, the heat dissipation of the pipe will decrease, and the cooling water will be damaged due to the large unevenness of the inner surface of the joint. This tends to lead to a deterioration of the flow.
とくに０．５ｍ＋ｓ〜１．０ｍｍの厚さを有するコーテ
ィング層が、コーティング層の均一化、端末加工性の向
上の点で好ましい。In particular, a coating layer having a thickness of 0.5 m+s to 1.0 mm is preferable in terms of uniformity of the coating layer and improvement in end processability.
［発明の効果コ
本発明により、高い防錆性によって錆の発生か確実に防
止され、孔食の発生も防止された経済的なエンジン冷却
管が提供される。[Effects of the Invention] The present invention provides an economical engine cooling pipe in which rust is reliably prevented due to its high rust resistance, and pitting corrosion is also prevented.
第１図は本発明のエンジン冷却管の一例を示す断面図、
第２図はエンジン冷却管の一部を示す斜視図、第３図は
従来のエンジン冷却管を示す断面図である。
（図面の符号）
（１）：コーティング層
（２） 、金属製管
（３）：外表面
（４）：エンジン冷却管FIG. 1 is a sectional view showing an example of the engine cooling pipe of the present invention;
FIG. 2 is a perspective view showing a part of an engine cooling pipe, and FIG. 3 is a sectional view showing a conventional engine cooling pipe. (Drawing codes) (1): Coating layer (2), Metal tube (3): Outer surface (4): Engine cooling pipe
Claims (1)
なるコーティング層を有するエンジン冷却管。1. An engine cooling pipe having a coating layer made of Si-containing crosslinked polyolefin on the inner surface of the metal pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18294790A JPH0472420A (en) | 1990-07-10 | 1990-07-10 | Engine cooling pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18294790A JPH0472420A (en) | 1990-07-10 | 1990-07-10 | Engine cooling pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0472420A true JPH0472420A (en) | 1992-03-06 |
Family
ID=16127143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18294790A Pending JPH0472420A (en) | 1990-07-10 | 1990-07-10 | Engine cooling pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0472420A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005038854A1 (en) * | 2003-10-17 | 2007-11-22 | 株式会社東芝 | X-ray equipment |
-
1990
- 1990-07-10 JP JP18294790A patent/JPH0472420A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2005038854A1 (en) * | 2003-10-17 | 2007-11-22 | 株式会社東芝 | X-ray equipment |
| JP4828942B2 (en) * | 2003-10-17 | 2011-11-30 | 株式会社東芝 | X-ray equipment |
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