JPS6320499A - Plating device for pipe inside - Google Patents
Plating device for pipe insideInfo
- Publication number
- JPS6320499A JPS6320499A JP16587386A JP16587386A JPS6320499A JP S6320499 A JPS6320499 A JP S6320499A JP 16587386 A JP16587386 A JP 16587386A JP 16587386 A JP16587386 A JP 16587386A JP S6320499 A JPS6320499 A JP S6320499A
- Authority
- JP
- Japan
- Prior art keywords
- plating
- metallic pipe
- long tube
- anode rod
- pipe
- 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
- 238000007747 plating Methods 0.000 title claims abstract description 79
- 239000011162 core material Substances 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000011247 coating layer Substances 0.000 claims description 10
- 239000010936 titanium Substances 0.000 claims description 10
- 229910052719 titanium Inorganic materials 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 24
- 238000005238 degreasing Methods 0.000 abstract description 19
- 238000009713 electroplating Methods 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 20
- 239000010410 layer Substances 0.000 description 17
- 238000005554 pickling Methods 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- -1 polyoxyethylene Polymers 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- FFJCNSLCJOQHKM-CLFAGFIQSA-N (z)-1-[(z)-octadec-9-enoxy]octadec-9-ene Chemical compound CCCCCCCC\C=C/CCCCCCCCOCCCCCCCC\C=C/CCCCCCCC FFJCNSLCJOQHKM-CLFAGFIQSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241000981595 Zoysia japonica Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 125000001117 oleyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])/C([H])=C([H])\C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は熱交換器や、ヒートパイプに利用される、特に
液媒体を流動させる伝熱管の内壁面のめっき装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a plating device for the inner wall surface of a heat exchanger tube used in a heat exchanger or a heat pipe, particularly in which a liquid medium flows.
従来の技術 熱交換部材に多孔質層を形成し、表面積の増大。Conventional technology Forming a porous layer on the heat exchange member increases the surface area.
沸騰伝熱の促進効果をはかることは一般に知られている
が、伝熱管内に多孔質層を形成することは焼結法や溶射
法では困難であるから通常はめつき法を利用する。Although it is generally known that the effect of promoting boiling heat transfer is measured, it is difficult to form a porous layer inside a heat transfer tube using a sintering method or a thermal spraying method, so a plating method is usually used.
伝熱管内壁面へのめっき方法としては、特開昭４９−１
０８２７号公報および特開昭５５−３８９７０号公報の
様に、金属管の中心軸に沿って挿入する陽極棒の両端部
に、絶縁性のキャップよりシールし、金属管内部にめっ
き液を入れ、陽極棒と金属管との間に電流を流して金属
管の内壁面にめっきすることが提案されている。As a method of plating the inner wall surface of heat exchanger tubes, Japanese Patent Application Laid-Open No. 49-1
As in JP-A No. 0827 and JP-A-55-38970, both ends of an anode rod inserted along the central axis of a metal tube are sealed with insulating caps, and a plating solution is poured inside the metal tube. It has been proposed to plate the inner wall surface of a metal tube by passing a current between the anode rod and the metal tube.
また、化学めっきによる方法としては特公昭５Ｂ−１８
９９１号公報の様に、単一のポンプにて複数本の長尺管
内壁面にめっき液を流し込みめっきを行う方法が提案さ
れている。In addition, as a method using chemical plating, Tokuko Sho 5B-18
As in Japanese Patent No. 991, a method has been proposed in which plating is performed by pouring a plating solution onto the inner wall surfaces of a plurality of long tubes using a single pump.
発明が解決しようとする問題点
しかしながら、化学めっき方法は、電気めっき方法に比
べて被めっき体表面の金属析出速度が遅く、又めっき処
理の時間経過にともない、めっき溶液循環ポンプの回転
子や軸受部分に金属の還元析出反応を生じる等の問題が
あった。その点、電気めっき方法は、比較的、金属析出
速度が早く、特に最近ではめっき液の被めっき体に対す
る相対速度を上げ、高電流密度でもってめっき処理を行
う、高速度めっき方法の確立がなされ、より合理的にめ
っき処理が可能となってきている。しかし、前記の公報
で示す実施例の様な、管内めっき処理方法であれば、中
心軸に沿って挿入するアノード棒の出し入れが非常に困
難であるばかりか、出し入れのたびに、内部を流れてい
ためっき液が外部に洩れ、伝熱管外壁面及び装置部材を
汚し、腐蝕させ、装置の故障の原因ともなる可能性があ
った。Problems to be Solved by the Invention However, the chemical plating method has a slower metal deposition rate on the surface of the plated object than the electroplating method, and as the plating process progresses, the rotor and bearings of the plating solution circulation pump There were problems such as metal reduction and precipitation reactions occurring in some parts. In this respect, electroplating methods have a relatively fast metal deposition rate, and recently, high-speed plating methods have been established that increase the relative speed of the plating solution to the object to be plated and perform plating with high current density. , it has become possible to perform plating processes more rationally. However, when using the in-pipe plating method as shown in the above-mentioned publication, not only is it extremely difficult to insert and remove the anode rod that is inserted along the central axis, but also the flow inside the pipe is extremely difficult each time the anode rod is inserted and removed. The plating solution leaked to the outside, staining and corroding the outer wall surface of the heat exchanger tubes and equipment members, and potentially causing equipment failure.
さらに、長尺管内径が小さく、アノード棒と長尺管内壁
面との距離が小さい場合には、アノード棒と被めっき体
である長尺管との間の電極間が抵抗が小さいため、アノ
ード棒自身の抵抗により、長尺管内壁面に対して均一な
電流密度が得られず、長尺管入口部と奥部とのめっき厚
さが変化する問題を生じていた。特に不溶性アノードと
して一般に使用されるチタン材で顕著な差が生じていた
。Furthermore, if the inner diameter of the long tube is small and the distance between the anode rod and the inner wall surface of the long tube is small, the resistance between the electrodes between the anode rod and the long tube that is the object to be plated is small; Due to its own resistance, a uniform current density could not be obtained on the inner wall surface of the long tube, resulting in a problem that the plating thickness between the entrance and the back of the long tube varied. In particular, there was a noticeable difference in titanium materials commonly used as insoluble anodes.
問題点を解決するための手段
上記問題点を解決するために、本発明の管内めっき装置
は、長尺管の中心軸に沿って、直流電源のプラス側に接
続されたアノード棒を挿入し、長尺管内部にめっき液を
導入し、長尺管内壁面に電気めっきするもので、アノー
ド棒の材質として芯材に銅等の良電導材を使用し、被覆
材としてチタン材等の様に芯材に使用した材料よりも導
電性の悪い材料を使用したものである。Means for Solving the Problems In order to solve the above problems, the in-pipe plating apparatus of the present invention inserts an anode rod connected to the positive side of a DC power supply along the central axis of the long pipe, A plating solution is introduced into the long tube and the inner wall surface of the long tube is electroplated.The anode rod is made of a good conductive material such as copper as the core material, and the core material such as titanium is used as the coating material. It uses a material with poorer conductivity than the material used for the material.
作 用
本発明は上記した構成によって、直流電源のプラス側に
接続されたアノード棒を長尺管の一方から挿入するだけ
で、管内部にめっき液を導入し、その流速を高速に流す
ことで、高電流密度が得られ金属の析出速度が速くでき
る。また−度、アノード棒を挿入し、設置するだけで、
一連のめっき工程である脱脂、水洗、酸洗、水洗、めっ
き処理。Function: With the above-described configuration, the present invention introduces the plating solution into the long tube by simply inserting the anode rod connected to the positive side of the DC power source from one side of the long tube, and allows the plating solution to flow at high speed. , high current density can be obtained and metal deposition rate can be increased. In addition, simply insert the anode rod and install it.
A series of plating processes: degreasing, washing with water, pickling, washing with water, and plating.
水洗、乾燥の各工程を連続して行うことも容易であり、
アノード棒の出し入れにより、めっき液が管外に洩れる
ことは少なく出来る。さらに、アノード棒の芯材として
銅等の良電導材料を使用し、表面に比較的抵抗の高いチ
タン材で被覆層を形成しており、アノード棒と被めっき
体である長尺管内壁面との間の抵抗がどの位置でもほぼ
等しくなるので、長尺管内壁面に対する電流密度が等し
くなり均一なめっき層が得られることになる。It is easy to perform each process of washing with water and drying in succession.
By moving the anode rod in and out, leakage of the plating solution to the outside of the tube can be reduced. Furthermore, a good conductive material such as copper is used as the core material of the anode rod, and a coating layer is formed on the surface of a titanium material with relatively high resistance, so that the anode rod and the inner wall surface of the long tube that is the object to be plated are connected. Since the resistance between the tubes is approximately the same at every position, the current density on the inner wall surface of the long tube is equal, resulting in a uniform plating layer.
実施例
以下本発明の一実施例について、第１図から第４図を参
考にしながら説明する。EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.
１は銅の伝熱管である長尺管２とアルミニウムの薄片加
工した放熱フィン３とからなる熱交換器である。Reference numeral 1 denotes a heat exchanger consisting of a long tube 2 that is a copper heat exchanger tube and a heat radiation fin 3 that is processed into a thin piece of aluminum.
２は長尺管２の内壁面４には凹凸の銅のめっき層６が形
成されている。またこの複数本並行した長尺管２の連結
はＵ字管６を溶接することにより行なわれである。この
様な熱交換器１は通常、空調用冷却システムに組み込ま
れ、内部にフロンガスを封入し、蒸発器や凝縮器として
使用される。2, an uneven copper plating layer 6 is formed on the inner wall surface 4 of the long tube 2. Further, the plurality of parallel long tubes 2 are connected by welding the U-shaped tubes 6. Such a heat exchanger 1 is usually incorporated into an air conditioning cooling system, seals fluorocarbon gas therein, and is used as an evaporator or a condenser.
７はヒーター８により温調可能な脱脂層で、脱脂液９が
入れられである。脱脂液９としては市販されているアル
カリ脱脂剤を使用した。１０はヒーター１１により温調
可能な水槽で、約５０℃の湯が入れられである。１２は
ヒーター１３により温調可能な酸洗液槽であり、酸洗液
１４が入っている。酸洗液１４としては、１チの希硫酸
を使用した。１６はヒーター１６で温調可能なめっき槽
であり、めっき液１７が入れられである。このめっき液
１７としては１６０ｆ／ｌ Ｃｕ５Ｑ４・６Ｈ２゜と６
０ｔ／１Ｈ２Ｓｏ４，０．１０ｔ／ｌポリオキシエチレ
ンオレイルエーテルおよび６０ｐｐｍの塩酸を加えた酸
性硫酸銅めっき液を使用する。7 is a degreasing layer whose temperature can be controlled by a heater 8, into which a degreasing liquid 9 is placed. As the degreasing liquid 9, a commercially available alkaline degreasing agent was used. 10 is a water tank whose temperature can be controlled by a heater 11, and is filled with hot water at about 50°C. 12 is a pickling liquid tank whose temperature can be controlled by a heater 13, and contains a pickling liquid 14. As the pickling liquid 14, 1 liter of dilute sulfuric acid was used. 16 is a plating tank whose temperature can be controlled by a heater 16, into which a plating solution 17 is placed. This plating solution 17 is 160f/l Cu5Q4・6H2° and 6
An acidic copper sulfate plating solution containing 0 t/1 H2So4, 0.10 t/l polyoxyethylene oleyl ether and 60 ppm hydrochloric acid is used.
また、１８はＵ字管６を溶接する前の銅パイプ伝熱管と
なる長尺管であり、すてに長尺管１８の外周には長尺管
１８を拡管することにより放熱フィン３が固定されてい
る。In addition, 18 is a long tube that becomes a copper pipe heat transfer tube before welding the U-shaped tube 6, and the radiation fins 3 are fixed to the outer periphery of the long tube 18 by expanding the long tube 18. has been done.
１９はアノード棒２０を長尺管１８の中心軸に沿って挿
入させると共に、シール管２１でもって端部のシールを
行ない、めっき液等を長尺管１８の内部に導入または長
尺管１８内部から流出させるだめの接続部材である。ア
ノード棒２０には直流電源２２のプラス側端子２３が結
縁されており、被めっき体である長尺管１８の内壁面４
と接触を防止するための絶縁スペーサー２４が取り付け
である。２５は脱脂槽７から脱脂液９を長尺管１８内部
に送り込むための脱脂液用ポンプであり、脱脂液９はＡ
三方弁２６とＢ三方弁２７を通り接続部材１９と長尺管
１８からＣ三方弁２８とＣ三方弁２９を経て脱脂槽７に
もどる様に配置されている。Reference numeral 19 inserts the anode rod 20 along the central axis of the long tube 18 and seals the end with the seal tube 21 to introduce the plating solution or the like into the long tube 18 . This is a connection member that allows water to flow out from the tank. A positive terminal 23 of a DC power source 22 is connected to the anode rod 20, and the inner wall surface 4 of the long tube 18, which is the object to be plated, is connected to the anode rod 20.
An insulating spacer 24 is attached to prevent contact with the metal. 25 is a degreasing liquid pump for sending the degreasing liquid 9 from the degreasing tank 7 into the long tube 18;
It is arranged so that it passes through the three-way valve 26 and the three-way B valve 27, from the connecting member 19 and the long pipe 18, and returns to the degreasing tank 7 via the three-way valve 28 and the three-way C valve 29.
３０は酸洗液槽１２から酸洗液１４を長尺管１８内部に
送り込むための酸洗液用ポンプであり、酸洗液１４はＥ
三方弁３１とＢ三方弁２７を通り接続部材１９と長尺管
１８からＣ三方弁２８とＦ三方弁３２を経て酸洗液槽１
２にもどる様に配置されている。３３はめっき槽１５か
らめっき液１７を長尺管１８内部に送り込むためのめつ
き液量ポンプであり、めっき液１７はΣ三方弁３１とＢ
三方弁２７を通り接続部材１９と長尺管１８からＣ三方
弁２６とＦ三方弁３２を経てめっき槽にもどる様配管さ
れている。さらに、３４は湯を水槽１０から長尺管１８
内部に送り込むための水用ポンプであり、湯はＡ三方弁
２６とＢ三方弁２７を通り接続部材１９と長尺管１８か
らＣ三方弁２８とＣ三方弁２９を経て水槽１０にもどる
様配管されている。30 is a pickling liquid pump for sending the pickling liquid 14 from the pickling liquid tank 12 into the long pipe 18;
The pickling liquid tank 1 passes through the three-way valve 31 and the three-way B valve 27, connects the connecting member 19, and the long pipe 18, passes through the three-way valve C 28, and the three-way F 32.
It is arranged so that it returns to 2. 33 is a plating liquid volume pump for feeding the plating liquid 17 from the plating tank 15 into the long pipe 18, and the plating liquid 17 is pumped between the Σ three-way valve 31 and the B
The piping is routed through the three-way valve 27, from the connecting member 19 and the long pipe 18, through the C three-way valve 26 and the F three-way valve 32, and back to the plating tank. Furthermore, 34 is a long pipe 18 for supplying hot water from the water tank 10.
This is a water pump for pumping water inside, and the hot water is piped so that it passes through the A three-way valve 26 and the B three-way valve 27, from the connecting member 19 and the long pipe 18, through the C three-way valve 28 and the C three-way valve 29, and returns to the water tank 10. has been done.
尚、３６は熱風乾燥機で開閉弁３６とリーク弁３７を通
り熱風を長尺管１８内部に送り込み乾燥させる様にして
いる。又、接続部材１９の位置は長尺管１８より下方に
位置する様設置されている。A hot air dryer 36 blows hot air into the long tube 18 through an on-off valve 36 and a leak valve 37 for drying. Furthermore, the connecting member 19 is positioned below the long tube 18.
さらに、接続部材１９のシール管２１部を長尺管１８の
端部３８に圧入した時、直流電源２２のマイナス端子３
９が長尺管１８と接続する様な構成となっている。３８
は直流電源２２の０Ｎ−ＯＦＦ及び、三方弁、ポンプ等
のＯＮ−ＯＦＦを制御する制御盤である。Furthermore, when the seal tube 21 portion of the connecting member 19 is press-fitted into the end portion 38 of the long tube 18, the negative terminal 3 of the DC power source 22
9 is connected to a long tube 18. 38
is a control panel that controls ON-OFF of the DC power supply 22 and ON-OFF of the three-way valve, pump, etc.
尚、アノード棒２０は、銅棒を芯材４０にチタン材を被
覆層４１としたもので、不溶化のために、めっき金属で
ある銅よりも責な白金で、さらに表面をめっきしたもの
を使用する。このチタン材の被覆層４１は、プラス側端
子２３が結線されていへ接続箇所近傍４２を厚くし、ア
ノード棒２０先端４３に向け薄く形成されている。The anode rod 20 is made of a copper rod as a core material 40 and a titanium material as a coating layer 41, and the surface is further plated with platinum, which is more harmful than copper, which is a plating metal, for insolubilization. do. The titanium coating layer 41 is thicker near the connection point 42 where the positive terminal 23 is connected, and thinner toward the tip 43 of the anode rod 20.
また、４４は水の排水の処理装置で、４６はアノード棒
２ｏを上下させるエアーシリンダーであり、４６はマス
キングテープである。Further, 44 is a water drainage treatment device, 46 is an air cylinder that moves the anode rod 2o up and down, and 46 is a masking tape.
次にかかる構成での熱交換器１の製造方法について説明
する。Next, a method for manufacturing the heat exchanger 1 with this configuration will be described.
ます長尺管１８と放熱フィン３とを定位置にて嵌合して
おき、長尺管１８を所定の拡管機で拡管し、長尺管１８
と放熱フィン３とを圧着させておく。The long tube 18 and the heat dissipation fin 3 are fitted together in a fixed position, and the long tube 18 is expanded using a predetermined tube expanding machine.
and the radiation fins 3 are crimped together.
次に、この長尺管１８の中心軸に沿って接続部材１９に
固定したアノード棒２０をエアーシリンダー４１を上げ
ることにより挿入する。また、シール管２１を長尺管１
８の端部３８に圧入させることにより、長尺管１８内部
をシールすると共に、マイナス端子３９を長尺管に接続
させる。Next, the anode rod 20 fixed to the connecting member 19 is inserted along the central axis of the long tube 18 by raising the air cylinder 41. In addition, the seal tube 21 is attached to the long tube 1.
By press-fitting it into the end portion 38 of the long tube 18, the inside of the long tube 18 is sealed, and the negative terminal 39 is connected to the long tube.
次に、第１工程として、長尺管１８内部の脱脂を行う。Next, as a first step, the inside of the long tube 18 is degreased.
すなわち、脱脂用ポンプ２６を稼動させ、三方弁Ａ２６
．Ｂ２７．Ｃ２Ｂ、Ｄ２９を制御することにより、脱脂
槽７内の脱脂液９を長尺管１８内部に流し込む。脱脂液
９の液温は６０℃とし、４０秒間脱脂処理を行った。脱
脂完了すると、脱脂用ポンプ２６が静止し、リーク弁３
７が開き、長尺管１８内、及び配管内の脱脂液を排出さ
せる。That is, the degreasing pump 26 is operated, and the three-way valve A26 is
．． B27. By controlling C2B and D29, the degreasing liquid 9 in the degreasing tank 7 is poured into the long tube 18. The temperature of the degreasing liquid 9 was 60° C., and degreasing was performed for 40 seconds. When degreasing is completed, the degreasing pump 26 stops and the leak valve 3 closes.
7 is opened, and the degreasing liquid inside the long tube 18 and piping is discharged.
排出完了后、リーク弁３７は閉じる。After the discharge is completed, the leak valve 37 is closed.
第２工程として、長尺管１８内部の湯洗を行う。As a second step, the inside of the long tube 18 is washed with hot water.
すなわち、水用ポンプ３４を稼動させ、三方弁Ａ２６、
Ｂ２７．Ｃ２８，Ｄ２９を制御することにより、水槽１
ｏ内の湯を長尺管１８内部に流し込む。湯の温度は６０
℃とし、３０秒間湯洗を行った。湯洗完了すると、水用
ポンプ３４を止め、リーク弁３７が開き、長尺管１８内
、及び配管内の脱脂液を排出させる。排出完了后、リー
ク弁３７は閉じる。That is, the water pump 34 is operated, and the three-way valve A26,
B27. By controlling C28 and D29, water tank 1
The hot water in O is poured into the long pipe 18. The temperature of the water is 60
℃ and washed with hot water for 30 seconds. When hot water washing is completed, the water pump 34 is stopped, the leak valve 37 is opened, and the degreasing liquid in the long pipe 18 and the piping is discharged. After the discharge is completed, the leak valve 37 is closed.
第３工程として、長尺管１８内部の酸洗を行う。As a third step, the inside of the long tube 18 is pickled.
すなわち、酸洗用ポンプ３ｏを稼動させ、三方弁Ｅ３１
、Ｂ２７，０２Ｂ、Ｆ３２を制御することにより、酸
洗液槽１２内の酸洗液１４を長尺管１８内部に流し込む
。酸洗液１４の液温は３０℃とし、１０秒間酸洗を行っ
た。酸洗が完了すると、酸洗用ポンプ３０が静止し、リ
ーク弁３７が開き、長尺管１８内、及び、配管内の酸洗
液を排出する。That is, the pickling pump 3o is operated, and the three-way valve E31 is
, B27, 02B, and F32, the pickling liquid 14 in the pickling liquid tank 12 is poured into the long pipe 18. The temperature of the pickling solution 14 was 30° C., and pickling was performed for 10 seconds. When the pickling is completed, the pickling pump 30 stops, the leak valve 37 opens, and the pickling liquid in the long pipe 18 and piping is discharged.
排出完了后、リーク弁３７は閉じる。After the discharge is completed, the leak valve 37 is closed.
第４工程としては第２工程と同じ内容を繰り返す。As the fourth step, the same contents as the second step are repeated.
第５工程として、長尺管１８内壁面４の凹凸のめっき層
６を形成させる。すなわち、めっき用ポンプ３３を稼動
させ、三方弁Ｅ３１ 、Ｂ２７゜Ｃ２Ｂ 、Ｆ３２を制
御することによシ、めっき槽１６内のめっき液１７を長
尺管１８内部に流し込む。めっき液１７の液温はヒータ
ー１６により５０℃に加温されている。めっき液１７が
長尺管１８内を循環開始すると同時に、直流電源２２に
より、長尺管１８にマイナス端子３９により負の電荷を
かけ、一方アノード棒２ｏにはプラス端子２３により正
の電荷をかけ、アノード棒２ｏと長尺管１８との間に電
流を流す。この時の電流密度は４０Ａ／ｄｒｒ？とし、
めっき液１７の流速は約１ｍ／′８＋とじて行った。め
っき処理時間は４分間とした。As a fifth step, an uneven plating layer 6 is formed on the inner wall surface 4 of the long tube 18. That is, by operating the plating pump 33 and controlling the three-way valves E31, B27°C2B, and F32, the plating solution 17 in the plating tank 16 is poured into the long pipe 18. The temperature of the plating solution 17 is heated to 50° C. by the heater 16. At the same time that the plating solution 17 starts circulating in the long tube 18, the DC power supply 22 applies a negative charge to the long tube 18 through the negative terminal 39, while applying a positive charge to the anode rod 2o through the positive terminal 23. , a current is passed between the anode rod 2o and the long tube 18. Is the current density at this time 40A/drr? year,
The flow rate of the plating solution 17 was approximately 1 m/'8+. The plating time was 4 minutes.
めっき完了層、電源を切り、リーク弁３７を開き、長尺
管１８内、及び、配管内のめつき液を排出させる。排出
完了后、リーク弁３７を閉じる。After the plating is completed, the power is turned off, the leak valve 37 is opened, and the plating liquid in the long tube 18 and the piping is discharged. After the discharge is completed, the leak valve 37 is closed.
第６エ程は第２工程と同じ内容を繰り返す。The sixth step repeats the same content as the second step.
第７エ程として、長尺管１８内部の乾燥を行う。As a seventh step, the inside of the long tube 18 is dried.
すなわち、リーク弁３７と開閉弁３６を開放させ、熱風
乾燥機３５より１００℃の熱風を長尺管１８内部に送り
込み乾燥させる。約３Ｑ秒間の乾燥を行った。That is, the leak valve 37 and the on-off valve 36 are opened, and hot air at 100° C. is sent from the hot air dryer 35 into the long tube 18 to dry it. Drying was performed for about 3 Q seconds.
以上が１サイクルの管内めっき処理工程であり、第４工
程の湯洗は１０秒間とし、各工程の制御時間を６秒とす
ると約７分間で１台のめっき処理が完了する。The above is one cycle of the pipe plating process, and if the hot water washing in the fourth process is 10 seconds and the control time of each process is 6 seconds, the plating process for one unit is completed in about 7 minutes.
ここで、通常のめっき液であれば、長尺管１８の内壁面
４全体に均一な厚みで銅が析出するが、めっき液１７に
は非イオン系の界面活性剤であるポリオキシエチレンオ
レイルニーテルト、６０ｐｐｍという低濃度の塩酸によ
り生じる塩素イオンとを有するため、全体に均一な厚み
の鋼めっき層とはならず、凹凸の銅めっき層５が形成さ
れることになる。限界電流密度以上でめっき処理を行っ
た時に生じるコブ状のめっき層とは異なり、本発明のめ
っき層６は安定して形成可能で、密着強度、及び、硬度
の面で優れており、表面積し増大、沸騰伝熱の促進効果
をはかる多孔質層として良好な性能を発起する。Here, if a normal plating solution is used, copper will be deposited in a uniform thickness on the entire inner wall surface 4 of the long tube 18, but the plating solution 17 is coated with polyoxyethylene oleyl powder, which is a nonionic surfactant. Because it contains telt and chlorine ions generated by hydrochloric acid at a low concentration of 60 ppm, the steel plating layer 5 does not have a uniform thickness over the entire surface, and the copper plating layer 5 is uneven. Unlike the knob-shaped plating layer that occurs when plating is performed at a current density higher than the critical current density, the plating layer 6 of the present invention can be stably formed, has excellent adhesion strength and hardness, and has a small surface area. It exhibits good performance as a porous layer that enhances boiling heat transfer.
尚、この凹凸の銅めっき層６の形成のための重要な条件
として、塩素イオン濃度の他に、電流密度により著しい
影響がある。そのため、長尺管２の中心に沿って、直流
電源２２のプラス側端子２３に接続されたアノード棒２
０を挿入し、長尺管２内部にめっき液を導入し、長尺管
２内壁面４に電気めっきを施す場合、アノード棒２ｏ自
身の抵抗が影響を与える。すなわち、プラス側端子２３
が結線されている接続箇所近傍４２では電流密度が高く
なり、またアノード棒２０先端４３付近では電流密度が
低くなる。よって、めっき層の厚みが変化するばかりか
、本実施例の様な凹凸めっき層を得るものにおいては、
凹凸のめっき状態が変化することにもなる。たとえば、
アノード棒２０に単一のチタン棒を使用し、内径９■の
６０１の長尺管２内壁面４にめっきする場合、アノード
棒２０の直径を４１１１１とすると、チタン自身の比抵
抗は約５０Ｘ１０−６Ω・１であるので、平均４０Ａ／
ｄｍ”ノミ流密度の電流を流したとしても、プラス側端
子２３が結線されている接続箇所近傍４２では約５５
Ａ／ｄｍ”の電流密度となり、アノード棒２０の先端４
３付近では約２５ Ａ／ｄｍ”となってしまう。In addition to the chlorine ion concentration, current density has a significant effect on important conditions for forming the uneven copper plating layer 6. Therefore, an anode rod 2 connected to the positive terminal 23 of the DC power supply 22 is placed along the center of the long tube 2.
When the anode rod 2o is inserted, a plating solution is introduced into the long tube 2, and the inner wall surface 4 of the long tube 2 is electroplated, the resistance of the anode rod 2o itself has an effect. That is, the positive terminal 23
The current density is high near the connection point 42 where the anode rod 20 is connected, and the current density is low near the tip 43 of the anode rod 20. Therefore, in the case where not only the thickness of the plating layer changes, but also an uneven plating layer as in this example is obtained,
The plating condition of the unevenness also changes. for example,
When using a single titanium rod as the anode rod 20 and plating the inner wall surface 4 of the long tube 2 of 601 with an inner diameter of 9 cm, if the diameter of the anode rod 20 is 41111, the specific resistance of titanium itself is approximately 50X10- Since it is 6Ω・1, the average is 40A/
Even if a current with a current density of dm" is applied, the current density is approximately 55% in the vicinity of the connection point 42 where the positive terminal 23 is connected.
A/dm" current density, and the tip 4 of the anode rod 20
3, it becomes about 25 A/dm".
しかし本実施例においては、芯材４０として比抵抗が１
．７Ｘ １０−６Ω・αの良電導材の銅棒を使用し、被
覆層４１材にチタン材を使用するため、比較的、アノー
ド自身の抵抗による電流密度の変化は小さくなり、さら
に、被覆層４１に比較的比抵抗の高いチタン材料使用す
ると共に、プラス側端子２３と接続された近傍において
被覆層４１を厚くし、アノード棒先端４３付近では薄く
しているため、各箇所でのアノード棒２０の表面の電流
密度が平均化され、長尺管２の内壁面４には均一に凹凸
のめっき層６が形成されることになる。However, in this embodiment, the core material 40 has a specific resistance of 1.
．． Since a copper rod with good conductivity of 7X 10-6Ω・α is used and titanium material is used for the coating layer 41, changes in current density due to the resistance of the anode itself are relatively small. In addition to using a titanium material with relatively high resistivity, the coating layer 41 is made thicker near the connection to the positive terminal 23 and thinner near the anode rod tip 43, so that the anode rod 20 is thinner at each location. The current density on the surface is averaged, and a uniformly uneven plating layer 6 is formed on the inner wall surface 4 of the long tube 2.
発明の効果
以上の様に、本発明は、長尺管の中心軸に沿って、直流
電源のプラス端子に接続されたアノード棒を挿入し、長
尺管内部にめっき液を導入し、長尺管内壁面に電気めっ
きを施すもので、前記アノード棒が、銅等の導電導材の
芯材と、芯材より導電性の悪いチタン材等の被覆層で構
成されたことを特徴とした管内めっき装置であり、電気
めっきによる方法であることから、高速度でめっきが完
了する。また、アノード棒自身の導電性もすぐれ、被覆
層が芯材よりも高い比抵抗の材料を使用しているので多
少厚みを制御することにより、長尺管内壁面へ流れる電
流密度を均一化することができ、めっき層の析出量を均
一にし、さらに凹凸めっきの状態も安定化した長尺管が
得られる。すなわち、熱交換部材として、管内の表面積
を増大させ、沸騰伝熱の促進がはかれた内面多孔質の伝
熱管を容易に得ることができる。Effects of the Invention As described above, the present invention has the following advantages: inserting an anode rod connected to the positive terminal of a DC power supply along the central axis of a long tube, introducing a plating solution into the inside of the long tube, In-pipe plating in which electroplating is applied to the inner wall surface of a pipe, and the anode rod is composed of a core material of a conductive material such as copper, and a coating layer of a material such as titanium material having a lower conductivity than the core material. Since it is a device and uses electroplating, plating can be completed at high speed. In addition, the anode rod itself has excellent conductivity, and the coating layer uses a material with a higher specific resistance than the core material, so by controlling the thickness to some extent, the current density flowing to the inner wall of the long tube can be made uniform. It is possible to obtain a long tube in which the amount of deposited plating layer is made uniform and the condition of uneven plating is also stabilized. That is, as a heat exchange member, it is possible to easily obtain a heat exchanger tube with a porous inner surface, which increases the surface area inside the tube and promotes boiling heat transfer.
第１図は本発明の一実施ＰＩＪを示す管内めっき装置の
アノード棒の断面図、第２図は同第１図のアノード棒を
長尺管の中心軸に沿って挿入した状態を示す断面図、第
３図は管内めっき装置の概略構成図、第４図は熱交換器
の斜視図である。
２．１８・・・・・・長尺管、４・・・・・・内壁面、
２０・・・・・・アノード棒、２２・・・・・・直流電
源、２３・・・・・プラス側端子、４ｏ・・・・・・芯
材、４１・・・・・・被覆層。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名２０
−−アノードオシ
２Ｊ−７うス剖痛予
句−１し羽
第４ｔ！１FIG. 1 is a sectional view of an anode rod of an in-pipe plating apparatus showing an embodiment of PIJ of the present invention, and FIG. 2 is a sectional view showing the anode rod of FIG. 1 inserted along the central axis of a long tube. , FIG. 3 is a schematic configuration diagram of the in-pipe plating apparatus, and FIG. 4 is a perspective view of the heat exchanger. 2.18...Long tube, 4...Inner wall surface,
20... Anode rod, 22... DC power supply, 23... Plus terminal, 4o... Core material, 41... Covering layer. Name of agent: Patent attorney Toshio Nakao and 1 other person 20
--Anode Oshi 2J-7 Usu Anatomical Pain Prediction-1 Shiba 4th T! 1
Claims (3)
子に接続されたアノード棒を挿入し、長尺管内部にめっ
き液を導入し、長尺管内壁面に電気めっきを施すもので
あって、前記アノード棒を良電導材の芯材と、芯材より
導電性の悪い被覆層とで構成したことを特徴とする管内
めっき装置。(1) An anode rod connected to the positive terminal of a DC power supply is inserted along the central axis of the long tube, a plating solution is introduced into the long tube, and the inner wall surface of the long tube is electroplated. An in-pipe plating apparatus, characterized in that the anode rod is composed of a core material made of a good conductive material and a coating layer having a conductivity lower than that of the core material.
ラス側端子接続部近傍を厚くし、アノード棒先端に向け
薄くしたことを特徴とする特許請求の範囲第１項記載の
管内めっき装置。(2) The in-pipe plating according to claim 1, characterized in that the thickness of the coating layer of the anode rod is thicker near the positive terminal connection portion of the DC power supply and thinner toward the tip of the anode rod. Device.
としたことを特徴とする特許請求の範囲第１項記載の管
内めっき装置。(3) The in-pipe plating apparatus according to claim 1, wherein the core material of the anode rod is made of a copper material, and the coating layer is made of a titanium material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16587386A JPS6320499A (en) | 1986-07-15 | 1986-07-15 | Plating device for pipe inside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16587386A JPS6320499A (en) | 1986-07-15 | 1986-07-15 | Plating device for pipe inside |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6320499A true JPS6320499A (en) | 1988-01-28 |
Family
ID=15820603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16587386A Pending JPS6320499A (en) | 1986-07-15 | 1986-07-15 | Plating device for pipe inside |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6320499A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02255066A (en) * | 1989-03-29 | 1990-10-15 | Nichiro Niigata Chikusan Kk | Preparation of croquette |
| KR100454475B1 (en) * | 2002-03-20 | 2004-10-28 | 에이테크솔루션(주) | Electroless plating method for the cooling line of injection molding |
| KR100481564B1 (en) * | 1999-10-05 | 2005-04-08 | 데이꼬꾸 쓰신 고교 가부시키가이샤 | Vibration generator |
-
1986
- 1986-07-15 JP JP16587386A patent/JPS6320499A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02255066A (en) * | 1989-03-29 | 1990-10-15 | Nichiro Niigata Chikusan Kk | Preparation of croquette |
| JPH0560907B2 (en) * | 1989-03-29 | 1993-09-03 | Nichiro Niigata Chikusan Kk | |
| KR100481564B1 (en) * | 1999-10-05 | 2005-04-08 | 데이꼬꾸 쓰신 고교 가부시키가이샤 | Vibration generator |
| KR100454475B1 (en) * | 2002-03-20 | 2004-10-28 | 에이테크솔루션(주) | Electroless plating method for the cooling line of injection molding |
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