JPS62214200A - Electrolytic polishing method for inside surface of metallic pipe - Google Patents
Electrolytic polishing method for inside surface of metallic pipeInfo
- Publication number
- JPS62214200A JPS62214200A JP5645186A JP5645186A JPS62214200A JP S62214200 A JPS62214200 A JP S62214200A JP 5645186 A JP5645186 A JP 5645186A JP 5645186 A JP5645186 A JP 5645186A JP S62214200 A JPS62214200 A JP S62214200A
- Authority
- JP
- Japan
- Prior art keywords
- current
- metallic pipe
- metal tube
- current density
- electrode rod
- 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.)
- Granted
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 27
- 239000003792 electrolyte Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 36
- 230000003746 surface roughness Effects 0.000 abstract description 17
- 238000005868 electrolysis reaction Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001007 puffing effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 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
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は金属管内面の電解研磨方法に関するものであり
、前記管内に対極と電解液を押入し、管に陽極電流を流
して管内面を電解研磨する際に、前記陽極電流を特定の
範囲内でパルス化し、光沢のある平滑表面を効率よく迅
速に得ることに関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for electropolishing the inner surface of a metal tube, in which a counter electrode and an electrolyte are forced into the tube, and an anodic current is passed through the tube to polish the inner surface of the tube. The present invention relates to pulsing the anodic current within a specific range during electrolytic polishing to efficiently and quickly obtain a glossy and smooth surface.
〈従来の技術〉
食品プラント、薬品プラント、化学プラントあるいは半
導体製造プラントなどに用いられる長尺細径ステンレス
鋼管においてはその内面に雑菌、ゴミ等が付着残存する
と、プラントによって製造しようとする製品の品質を悪
化させたり、場合によっては全くの不良品にしてしまう
と言われている。そこで、付着抑制あるいは洗浄の容易
化のために、それら管内面は０．５ｐｍ Ｒｍ ａ ｘ
、以下の表面粗度に仕上げることが要求され始めてい
る。<Conventional technology> If bacteria, dirt, etc. remain on the inside of long, small-diameter stainless steel pipes used in food plants, pharmaceutical plants, chemical plants, or semiconductor manufacturing plants, the quality of the products being manufactured by the plant will be affected. It is said that this can make the product worse, or in some cases even make the product completely defective. Therefore, in order to suppress adhesion or facilitate cleaning, the inner surface of these pipes should be 0.5 pm Rmax
, it is beginning to be required to finish the surface to the following surface roughness.
ところで、金属の表面仕上げ方法としては、研削やパフ
などの機械研磨による方法が知られている。By the way, methods using mechanical polishing such as grinding and puffing are known as methods for finishing the surface of metal.
しかしながら、研削やパフなどの機械研磨方法により長
尺細径管内面にそのような平滑表面を付与することは、
生産性、コス） ｉｔどを考慮すると工業的には不可能
に近い。However, it is difficult to impart such a smooth surface to the inner surface of a long narrow diameter tube by mechanical polishing methods such as grinding or puffing.
Considering productivity, cost, IT, etc., it is almost impossible from an industrial perspective.
そこで最近では電解研磨が適用され始めている。Therefore, electrolytic polishing has recently begun to be applied.
長尺管の内面に対する電解研磨法としては、■特開昭５
４−４８３９９号に記載の方法が知られている。すなわ
ち、この方法は、第８図に示すように、金属管ｌの内径
より小なる外径を有する円筒状の電極４の両端面を、絶
縁物で被覆し、電極４を管１内に移動自在に設け、管１
を陽極性に、電極４を陰極性にそれぞれ接続し、管ｌ内
に電解液を圧送するとともに、電極４を移動し、かつ、
金属管１と電極４間に、第２図に示すような不動態領域
と過不動態領域を交互に繰り返す脈流電圧あるいはパル
ス電圧を印加し、電解溶出により、金属管ｌの内面を研
磨する方法（脈流電流電解法）である。As an electrolytic polishing method for the inner surface of a long tube,
The method described in No. 4-48399 is known. That is, as shown in FIG. 8, in this method, both end surfaces of a cylindrical electrode 4 having an outer diameter smaller than the inner diameter of a metal tube 1 are covered with an insulator, and the electrode 4 is moved into the tube 1. Freely install pipe 1
is connected to the positive polarity, and the electrode 4 is connected to the negative polarity, and while the electrolytic solution is pumped into the tube l, the electrode 4 is moved, and
A pulsating voltage or pulse voltage that alternately repeats a passive region and a hyperpassive region as shown in Fig. 2 is applied between the metal tube 1 and the electrode 4, and the inner surface of the metal tube 1 is polished by electrolytic elution. method (pulsating current electrolysis method).
■また、特開昭５４−４８３９９号における脈流電流に
代え、第３図に示すようなく形波電流を陽極と陰極を反
転させつつ通電する反転電流電解法も知られている（特
開昭６Ｏ−１５９２００）。■Also known is a reversal current electrolysis method in which a waveform current is applied while reversing the anode and cathode as shown in Figure 3, instead of the pulsating current disclosed in JP-A No. 54-48399. 6O-159200).
■さらに、特開昭５４−４８３９９号における脈流電流
に代え第４図に示すような直流電流を通電させる直流定
電流電解法も知られている。(2) Furthermore, there is also known a DC constant current electrolysis method as shown in FIG. 4, in which a DC current is applied instead of the pulsating current as disclosed in Japanese Patent Application Laid-Open No. 54-48399.
く゛発明が解決しようとする問題点〉
ところで、金属管内面を電解研磨する場合には、管内に
押入する電極の表面積が管内面の表面積よりも本質的に
必ず小さくならざるを得ないため、流し得る電解電流が
限定される。そのため、電流密度を高くして電解研磨効
率を上げようとすれば、管内に押入した対極の通電部分
の面積、すなわち通電部分長さを短かくせねばならず、
従って長尺管内面を全長に渡って平滑表面にするために
は長時間を要するし、逆に、電極の通電部分長さを長く
して、長尺管の移動距離を相対的に短かくすることによ
って１時間の短縮をしようとすると、電流密度が高く出
来ず、電解□研磨効率が下り、結局長時間を要する。[Problems to be Solved by the Invention] By the way, when electrolytically polishing the inner surface of a metal tube, the surface area of the electrode pushed into the tube must essentially be smaller than the surface area of the inner surface of the tube. The electrolytic current that can be obtained is limited. Therefore, in order to increase the current density and improve the electrolytic polishing efficiency, the area of the current-carrying part of the counter electrode inserted into the tube, that is, the length of the current-carrying part, must be shortened.
Therefore, it takes a long time to make the inner surface of the long tube smooth over its entire length, and conversely, it is necessary to increase the length of the energized part of the electrode to relatively shorten the distance the long tube moves. If an attempt is made to shorten the polishing time by one hour, the current density cannot be increased, the electrolytic polishing efficiency decreases, and a long time is required.
しかるに、従来の研磨方法では、０．５ＪＬｍＲｗａｘ
の表面粗度に達するまでの時間が長いという問題という
問題点があった。However, in the conventional polishing method, 0.5JLmRwax
There is a problem in that it takes a long time to reach a surface roughness of .
なお、従来の方法では、高い表面粗度を良好な研磨効率
をもって得ることは困難であった。Note that with conventional methods, it has been difficult to obtain high surface roughness with good polishing efficiency.
く問題点を解決するための手段〉
発明者らは、金属管管内に、通電部以外は絶縁被覆を施
した、金属管の内径より径の小さい電極を押入し、電解
液を循環させながら種々のパルス電流等により電解研磨
を行った結果、特定条件下での短形波による電解研磨に
より、著しく短時間で一定の平滑鏡面が得られることを
発見した。この発見に基づいて、更に種々検討を重ね、
本発明を構成するに至った。Means for Solving Problems〉 The inventors inserted into a metal tube an electrode whose diameter was smaller than the inner diameter of the metal tube and which had an insulating coating except for the current-carrying part, and conducted various tests while circulating an electrolyte. As a result of performing electrolytic polishing using a pulsed current, etc., it was discovered that electrolytic polishing using a rectangular wave under specific conditions can produce a uniformly smooth mirror surface in a very short time. Based on this discovery, various studies were conducted,
The present invention has now been constructed.
すなわち、本発明は、金属管内に、該金属管内を長手方
向に移動自在であり通電部以外は絶縁皮膜を施した電極
棒を押入し、該金属管内に電解液を送り込み、かつ、該
金属管内を該電極棒を移動させつつ、該金属管と該電極
棒との間に短形波の電流を通電することにより前記金属
管内面を電解研磨する方法において、平均陽極電流密度
を６０Ａ／ｄｍ２以上とし、その時の平均電流密度に対
する高電流の電流密度および低電流の電流密度の比が１
０〜８０％の範囲内とすることを特徴とする電解研磨方
法である。That is, in the present invention, an electrode rod that is movable in the longitudinal direction inside the metal tube and is coated with an insulating film except for the current-carrying part is inserted into the metal tube, an electrolytic solution is sent into the metal tube, and the electrode rod is moved inside the metal tube in the longitudinal direction. A method of electrolytically polishing the inner surface of the metal tube by passing a rectangular wave current between the metal tube and the electrode rod while moving the electrode rod, wherein the average anode current density is 60 A/dm2 or more. The ratio of the current density of high current and the current density of low current to the average current density at that time is 1.
This is an electrolytic polishing method characterized in that the polishing ratio is within a range of 0 to 80%.
本発明め対象となる金属管管の材質は導電性のものなら
ば特に問わない、ただ、ステンレス鋼管、アルミ管等の
不動態化しやすい金属管に対してより好適である。また
その形状にも限定されないが、陰極面積に制限を受けて
流し得る電流密度に制限を受けるような金属管、たとえ
ば長尺細径金属管等、に対して特に好適である。The material of the metal pipe to be used in the present invention is not particularly limited as long as it is electrically conductive, but it is more suitable for metal pipes that are easily passivated, such as stainless steel pipes and aluminum pipes. Although the shape is not limited, it is particularly suitable for metal tubes in which the current density that can be passed is limited by the area of the cathode, such as long thin metal tubes.
電極棒は導電性材料よりなるものならばその種類は問わ
ない、電極棒は電流密度を高めるために通電部以外は絶
縁されている。そして、電極棒を長手方向に移動させつ
つ電極棒と金属管との間に通電する。The electrode rod may be of any type as long as it is made of a conductive material, and the electrode rod is insulated except for the current-carrying part in order to increase the current density. Then, electricity is applied between the electrode rod and the metal tube while moving the electrode rod in the longitudinal direction.
電解液は電解研磨しようとする金ＫＢ管の種類に応じて
適宜選択すればよい。The electrolytic solution may be appropriately selected depending on the type of gold KB tube to be electrolytically polished.
通電する電流は短形波の電流である。The current flowing is a rectangular wave current.
本発明においては、この電流の平均陽極電流密度ｉ―は
６０Ａ／ｄｒｎ’以上とする。また、平均電流密度ｉ、
に対する高電流の電流密度ｆｈおよび低電流の電流密度
１１の比は１０〜８０％の範囲内とすることを特徴とす
る。In the present invention, the average anode current density i- of this current is 60 A/drn' or more. Also, the average current density i,
The ratio of the high current current density fh to the low current current density 11 is within the range of 10 to 80%.
なお、ｌパルスあたりの高電流の通電時間（ＴＩ ）お
よび低電流の通電時間（Ｔ２）をそれぞれ０．１〜３０
秒とすることが好ましい。この場合には、研磨効率が高
くなるばかりでなく得られる金属管の内面の表面粗度は
０ 、２ ｇｍＲ、ａ、以下であり、極めて高い平滑表
面が得られる。Note that the high current conduction time (TI) and low current conduction time (T2) per l pulse are each 0.1 to 30.
Preferably, it is seconds. In this case, not only is the polishing efficiency high, but the surface roughness of the inner surface of the resulting metal tube is 0.2 gmR,a or less, and an extremely smooth surface can be obtained.
〈実施例〉 以下、本発明を一実施例によってより詳細に説明する。<Example> Hereinafter, the present invention will be explained in more detail by way of an example.
外径６．４φｍｍ、内径４．４φｍｍ、長さ４．０００
ｍｍの５ＵＳ３１６Ｌステンレス鋼管で、管内面粗度が
２〜３ ｇ ｍ Ｒｍ ａ ｘの鋼管内に、６０℃に保
持した燐酸、硫酸および水の混合した電解液をポンプに
より循環させた状態で、通電部分長さを３００ ｍ ｍ
にし、他の部分を絶縁被覆処理した外径３φｍｍの銅線
を、そめ通電部分に対応する管内面への通電時間の合計
が、それぞれの試験において所定の時間となる速度で管
内を移動させながら、第１表に示す種々の電解条件で電
解研磨を行った。Outer diameter 6.4φmm, inner diameter 4.4φmm, length 4.000
A 5US316L stainless steel tube with an inner surface roughness of 2 to 3 gm Rmax was heated while an electrolytic solution containing a mixture of phosphoric acid, sulfuric acid, and water kept at 60°C was circulated by a pump. Part length 300mm
A copper wire with an outer diameter of 3φmm with other parts treated with insulation coating was moved inside the pipe at a speed such that the total time for energizing the inner surface of the tube corresponding to the energized parts was the predetermined time in each test. , electrolytic polishing was performed under various electrolytic conditions shown in Table 1.
それぞれの電解条件下での、上記の通電時間は３０秒間
隔で、５分間まで実施した。すなわち、第１表に示す各
電解条件ＮＯ０のそれぞれにおいて、９条件の電解研磨
を実施した。The above-mentioned energization time under each electrolysis condition was carried out at 30 second intervals for up to 5 minutes. That is, electrolytic polishing was performed under nine conditions under each electrolytic condition NO0 shown in Table 1.
電解研磨後、管内面の表面粗度を粗さ測定器で測定した
。After electrolytic polishing, the surface roughness of the inner surface of the tube was measured using a roughness meter.
それぞれの試験において、得られた表面粗度が０．３
ＪＪ、ｍＲｍａｘを達成する時間で整理したものを第５
図に示す、これらの試験におけるＴＩおよびＴ２は全て
５秒とした。In each test, the obtained surface roughness was 0.3
JJ, organized by the time to achieve mRmax, is the fifth
The TI and T2 in these tests shown in the figure were all 5 seconds.
第５図より明らかなように１本発明による電解研磨方法
である電解条件ＮＯ，１６〜２３は、 ０ 、３ ｇ
ｍＲｓａｘの表面粗度を得るまでの電解時間が３分以内
であり、従来法の直流定電流電解、陽極と陰極の反転電
流電解あるいは脈流電流電解法に比べて、著しい電解時
間の短縮となっている。As is clear from FIG. 5, the electrolytic conditions Nos. 16 to 23 of the electrolytic polishing method according to the present invention are as follows: 0.3 g
The electrolysis time required to obtain mRsax surface roughness is within 3 minutes, which is a significant reduction in electrolysis time compared to conventional DC constant current electrolysis, anode and cathode reversal current electrolysis, or pulsating current electrolysis. ing.
第６図に従来法である第１の電解条件Ｎｏ。FIG. 6 shows the first electrolytic condition No. which is a conventional method.
２および本発明法である同じく第１表の電解条件ＮＯ，
２２における電解時間と電解後表面粗度の関係を示す、
従来法では、５分間電解にも□ 到達表面粗度は約０
、３１ＬｍＲｓａｘであるが、本発明法においては、わ
ずか２分間の電解によりＯ、ｌ ５ ｇｍＲａａｘ と
なり、更に、３分間以上で０ 、１０ ｇｍＲａａｘｍ
５ａＸ以下られ。2 and the electrolytic conditions No. 2 in Table 1, which is the method of the present invention,
22 shows the relationship between electrolysis time and surface roughness after electrolysis,
With the conventional method, even after 5 minutes of electrolysis, the achieved surface roughness is approximately 0.
, 31LmRsax, but in the method of the present invention, O,l 5 gmRaax is obtained by electrolysis for only 2 minutes, and further, 0,10 gmRaaxm is obtained by electrolysis for 3 minutes or more.
Less than 5aX.
本発明による電解法の著しい研磨効率が明らかである。The remarkable polishing efficiency of the electrolytic method according to the invention is evident.
更に、第７図に、第１表に示した本発明法である電解条
件ＮＯ，２２において、電解時間が４分間の場合におけ
る、ＴＩおよびＴ２のパルス電流間隔時間に対する電解
研磨後の表面粗度を示す。第７図より明らかなように、
矩形波電流間隔時間が０．１秒未満では、到達表面粗ｉ
がＱ 、３ ’ｇ ｍ５ａＸ以下となり、また３０秒を
超えると０ 、３１Ｌｍ＠４．以上と、研磨効果が劣化
してくる。従って、望ましくは、本発明法における電解
研磨法において、その矩形波電流の間隔時間は、０．１
〜３０秒の範囲である。Furthermore, FIG. 7 shows the surface roughness after electrolytic polishing with respect to the pulse current interval time of TI and T2 when the electrolytic time is 4 minutes under electrolytic conditions No. 22, which is the method of the present invention shown in Table 1. shows. As is clear from Figure 7,
When the square wave current interval time is less than 0.1 seconds, the final surface roughness i
becomes less than Q, 3'g m5aX, and if it exceeds 30 seconds, it becomes 0, 31Lm@4. As the polishing effect increases, the polishing effect deteriorates. Therefore, in the electrolytic polishing method according to the present invention, the interval time of the rectangular wave current is preferably 0.1
~30 seconds.
以上の実施例が示すように、本発明による電解研磨法の
効果は長尺側径の内面電解研磨のように、陰極面積に制
限を受けて、流し得る電流密度に制限を受ける場合にお
いて極めて有効である。なお、本発明は長尺細径以外の
形状のもの、あるいは、材質が異っても、同様の効果が
あることは言うまでもない。As shown in the above examples, the effect of the electropolishing method according to the present invention is extremely effective in cases where the cathode area is limited and the current density that can be passed is limited, such as in internal electropolishing of long side diameters. It is. It goes without saying that the present invention can have similar effects even if the shape is other than long and narrow, or if the material is different.
〈発明の効果〉
本発明によれば長尺細径ステンレス鋼管内面を所定の表
面粗度を有する表面に仕上げる電解時間が大幅に短縮さ
れること、従って生産性が著しく向上すると共に使用電
力も大幅に減少すること等による工業的価値は極めて大
きい。<Effects of the Invention> According to the present invention, the electrolysis time for finishing the inner surface of a long, small-diameter stainless steel pipe to a surface with a predetermined surface roughness is significantly shortened, and therefore productivity is significantly improved and power consumption is also significantly reduced. The industrial value of this reduction is extremely large.
第１図は本発明の一実施例における電流波形を示すグラ
フである。第２図から第４図までは従来例における電流
波形を示すグラフである。
第５図は０ 、３ ＃Ｌｍ Ｒ＊ａｘまでの到達電解時
間を示すグラフである。第６図は電解時間と電解研磨後
の表面粗度との関係を示すグラフである。第７図はパル
ス電流間隔と電解研磨後の表面粗度との関係を示すグラ
フである。第８図は電解研磨方法例を示すための金属管
内の断面図である。
１・・金属管、４・・電極、７・・電解液。
ｌ ３
第１図
第３図
一う時間
第２図
第４図
第６図
電解研磨後表面粗度Ｒｍａｘ、、（ｐｍ）電解時間（分
）
第７図
パルス電流間隔（ｓｅｅ）
第８図
手続補正書
１、事件の表示
特許願昭和６１年０５６４５１号
２、発明の名称
金属管内面の電解研磨方法
３、補正をする者
事件との関係 特許出願人
住 所 兵庫県神戸市中央区脇浜町
１丁目３番１８号
名 称 （１１９）株式会社神戸製鋼所代表者 牧
冬 彦
４、代 理 人 〒１６０電話０３（３５Ｂ）８８４０
住 所 東京都新宿区本塩町 １２
５、補正により増加する発明の数 ０６、補正
の対象
明細書の特許請求の範囲及び発明の詳細な説明の欄７、
補正の内容
（１）特許請求の範囲を別紙のとおり補正する。
（２）明細書第５頁第６行目の「問題という問題点」を
ｒ問題点」と補正する。
（３）明細書第５頁第１５行目、第７頁第６行目、第１
Ｏ頁第４行目及び第１０頁第９行目の「短形波」を「矩
形波」と補正する。
（４）明細書第６頁第１１行目の「金属管管」を「金属
管」と補正する。
８、前記以外の代理人
（１）代理人 〒１１３０電話０３（３５８）８８４０
住所 東京都新宿区本塩町 １２
、
特許請求の範囲
（１）金属管内に、該金属管内を長手方向に移動自在で
あり通電部以外は絶縁皮膜を施した電極棒を押入し、該
金属管内に電解液を送り込み、かつ、該金属管内を該電
極棒を移動させつつ、該金属管と該電極棒との間に粗形
波の電流を通電することにより前記金属管内面を電解研
磨する方法において、平均陽極電流密度を６０Ａ／ｄｒ
ｎ’ 以上とし、その時の平均電流密度に対する高電
流の電流密度および低電流の電流密度の比が１０〜８０
％の範囲内とすることを特徴とする電解研磨方法。
（２）高電流および低電流の通電時間がそれぞれｌパル
スあたり０．１〜３０秒である特許請求の範囲第１項記
載の電解研磨方法。FIG. 1 is a graph showing a current waveform in an embodiment of the present invention. 2 to 4 are graphs showing current waveforms in the conventional example. FIG. 5 is a graph showing the electrolysis time required to reach 0,3 #Lm R*ax. FIG. 6 is a graph showing the relationship between electrolysis time and surface roughness after electropolishing. FIG. 7 is a graph showing the relationship between the pulse current interval and the surface roughness after electrolytic polishing. FIG. 8 is a cross-sectional view of the inside of a metal tube to show an example of an electrolytic polishing method. 1. Metal tube, 4. Electrode, 7. Electrolyte. l 3 Figure 1 Figure 3 Time Figure 2 Figure 4 Figure 6 Surface roughness after electrolytic polishing Rmax,, (pm) Electrolysis time (minutes) Figure 7 Pulse current interval (see) Figure 8 Procedure Written amendment 1, Indication of the case Patent Application No. 056451/1988 2, Name of the invention Method for electrolytic polishing of the inner surface of a metal tube 3, Person making the amendment Relationship to the case Patent applicant address 1, Wakihama-cho, Chuo-ku, Kobe, Hyogo Prefecture No. 3-18 Chome Name (119) Kobe Steel, Ltd. Representative Fuyuhiko Maki 4, Agent Address: 160 Telephone 03 (35B) 8840
Address: 12-5 Motoshio-cho, Shinjuku-ku, Tokyo; Number of inventions increased by amendment: 06; Column 7: Claims of the specification subject to amendment and detailed description of the invention;
Contents of amendment (1) The scope of claims is amended as shown in the attached sheet. (2) "Problem called problem" on page 5, line 6 of the specification is corrected to "r problem". (3) Page 5, line 15 of the specification, page 7, line 6, 1
The "rectangular wave" on the 4th line of page O and the 9th line of page 10 is corrected to "rectangular wave." (4) "Metal tube" on page 6, line 11 of the specification is corrected to "metal tube." 8. Agents other than those listed above (1) Agent 1130 Phone: 03 (358) 8840
Address: 12 Honshio-cho, Shinjuku-ku, Tokyo, Claims: (1) An electrode rod that is movable longitudinally within the metal tube and is coated with an insulating film except for the current-carrying part is inserted into the metal tube. In a method of electrolytically polishing the inner surface of the metal tube by feeding an electrolytic solution and passing a coarse wave current between the metal tube and the electrode rod while moving the electrode rod within the metal tube. , the average anode current density is 60A/dr
n' or more, and the ratio of the current density of the high current and the current density of the low current to the average current density at that time is 10 to 80.
An electropolishing method characterized by polishing within a range of %. (2) The electrolytic polishing method according to claim 1, wherein the high current and low current application times are each 0.1 to 30 seconds per 1 pulse.
Claims (2)
あり通電部以外は絶縁皮膜を施した電極棒を押入し、該
金属管内に電解液を送り込み、かつ、該金属管内を該電
極棒を移動させつつ、該金属管と該電極棒との間に短形
波の電流を通電することにより前記金属管内面を電解研
磨する方法において、平均陽極電流密度を６０Ａ／ｄｍ
＾２以上とし、その時の平均電流密度に対する高電流の
電流密度および低電流の電流密度の比が１０〜８０％の
範囲内とすることを特徴とする電解研磨方法。(1) Inserting an electrode rod that is movable longitudinally within the metal tube and coated with an insulating film except for the current-carrying part into the metal tube, feeding an electrolyte into the metal tube, and passing the electrode into the metal tube. A method of electrolytically polishing the inner surface of the metal tube by passing a rectangular wave current between the metal tube and the electrode rod while moving the rod, the average anode current density being 60 A/dm.
^2 or more, and the ratio of the current density of the high current and the current density of the low current to the average current density at that time is within the range of 10 to 80%.
スあたり０．１〜３０秒である特許請求の範囲第（１）
項記載の電解研磨方法。(2) Claim No. 1, wherein the high current and low current energization times are each 0.1 to 30 seconds per pulse.
The electrolytic polishing method described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645186A JPS62214200A (en) | 1986-03-14 | 1986-03-14 | Electrolytic polishing method for inside surface of metallic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5645186A JPS62214200A (en) | 1986-03-14 | 1986-03-14 | Electrolytic polishing method for inside surface of metallic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62214200A true JPS62214200A (en) | 1987-09-19 |
| JPH0548319B2 JPH0548319B2 (en) | 1993-07-21 |
Family
ID=13027464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5645186A Granted JPS62214200A (en) | 1986-03-14 | 1986-03-14 | Electrolytic polishing method for inside surface of metallic pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62214200A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8201619B2 (en) | 2005-12-21 | 2012-06-19 | Exxonmobil Research & Engineering Company | Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery |
| US8286695B2 (en) | 2005-12-21 | 2012-10-16 | Exxonmobil Research & Engineering Company | Insert and method for reducing fouling in a process stream |
| JP2023070216A (en) * | 2021-11-09 | 2023-05-19 | 株式会社アサヒメッキ | Electrolytic polishing solution, method of electrolytically polishing stainless steel using the same, and method of producing stainless steel excellent in corrosion resistance |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415494B (en) | 2011-03-09 | 2015-09-30 | 三菱化学株式会社 | The manufacture method of conjugated diolefine |
| JP5842689B2 (en) * | 2011-03-22 | 2016-01-13 | 三菱化学株式会社 | Method for producing conjugated diene |
-
1986
- 1986-03-14 JP JP5645186A patent/JPS62214200A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8201619B2 (en) | 2005-12-21 | 2012-06-19 | Exxonmobil Research & Engineering Company | Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery |
| US8286695B2 (en) | 2005-12-21 | 2012-10-16 | Exxonmobil Research & Engineering Company | Insert and method for reducing fouling in a process stream |
| US8469081B2 (en) | 2005-12-21 | 2013-06-25 | Exxonmobil Research And Engineering Company | Corrosion resistant material for reduced fouling, a heat transfer component having reduced fouling and a method for reducing fouling in a refinery |
| JP2023070216A (en) * | 2021-11-09 | 2023-05-19 | 株式会社アサヒメッキ | Electrolytic polishing solution, method of electrolytically polishing stainless steel using the same, and method of producing stainless steel excellent in corrosion resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0548319B2 (en) | 1993-07-21 |
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