JPH06306699A - Method for electropolishing stainless steel - Google Patents
Method for electropolishing stainless steelInfo
- Publication number
- JPH06306699A JPH06306699A JP9755293A JP9755293A JPH06306699A JP H06306699 A JPH06306699 A JP H06306699A JP 9755293 A JP9755293 A JP 9755293A JP 9755293 A JP9755293 A JP 9755293A JP H06306699 A JPH06306699 A JP H06306699A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- electropolishing
- hydrochloric acid
- electrolytic
- glycerin
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、安価で、かつ工業的な
ステンレス鋼の電解研磨方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive and industrial method for electrolytically polishing stainless steel.
【０００２】[0002]
【従来の技術】ステンレス鋼の表面平滑化の方法には、
機械研磨や化学研磨のほか電解研磨による方法がある。
電解研磨方法については種々の方法が提案されている
が、このうち平滑化性能が高く一般に良く用いられてい
る方法は、例えば、ステンレス鋼便覧（日刊工業新聞社
出版）８５４ページに記載されている、過塩素酸系、り
ん酸−硫酸−クロム酸浴による電解法である。この他、
硫酸−グリセリン、りん酸−グリセリン系などがある。2. Description of the Related Art A method for smoothing the surface of stainless steel includes
In addition to mechanical polishing and chemical polishing, there are methods using electrolytic polishing.
Various electropolishing methods have been proposed. Among them, a method which has a high smoothing property and is commonly used is described in, for example, page 854 of Stainless Steel Handbook (published by Nikkan Kogyo Shimbun). , A perchloric acid system, a phosphoric acid-sulfuric acid-chromic acid bath. Besides this,
Sulfuric acid-glycerin, phosphoric acid-glycerin system and the like.
【０００３】しかし、これらの電解研磨方法の多くは平
滑化能力が小さく、また、平滑化能力が高いものは高価
な酸やクロム酸のような有害な酸を用いているため、工
業的に使用するには難点がある。However, many of these electrolytic polishing methods have a small smoothing ability, and those having a high smoothing ability use an expensive acid or a harmful acid such as chromic acid, so that they are industrially used. There is a difficulty in doing so.
【０００４】そこで、クロム酸などの有害物質を使用す
ることなく、安価で工業的規模で使用出来る電解研磨方
法について鋭意研究を行った結果、塩酸−グリセリン水
溶液によるステンレス鋼の電解研磨方法を見出した。Then, as a result of intensive studies on an electrolytic polishing method which can be used on an industrial scale at a low cost without using harmful substances such as chromic acid, an electrolytic polishing method for stainless steel by a hydrochloric acid-glycerin aqueous solution was found. .
【０００５】[0005]
【発明が解決しようとする課題】本発明は、平滑化能力
が高く安価でかつ工業的規模で使用出来るステンレス鋼
の電解研磨方法を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrolytic polishing method for stainless steel which has a high smoothing ability, is inexpensive and can be used on an industrial scale.
【０００６】[0006]
【課題を解決するための手段】ステンレス鋼の電解研磨
処理に際し、塩酸とグリセリンの混合液を電解液とし
て、該電解液中でステンレス鋼を陽極として電解処理す
る電解研磨方法である。望ましい電解液の濃度が電解液
１ｌ当たり塩酸３０〜２００ｇとグリセリンを６００〜
１０００ｇとするものであり、電解の電流密度が０.１
〜０.５Ａ／cm2でかつ電気量１０クーロン以上で電解処
理する。In the electrolytic polishing of stainless steel, an electrolytic polishing method is used in which a mixed solution of hydrochloric acid and glycerin is used as an electrolytic solution, and stainless steel is used as an anode in the electrolytic solution. A desirable concentration of the electrolyte is 30 to 200 g of hydrochloric acid and 600 to glycerin per liter of the electrolyte.
The current density of electrolysis is 0.1g.
Electrolysis is performed at 0.5 A / cm 2 and an electric quantity of 10 coulombs or more.
【０００７】[0007]
【作用】以下本発明の塩酸とグリセリン混合液による電
解研磨方法について説明する。電解研磨液の一般的な特
徴は、濃厚な酸化性酸で高粘度かつ溶解金属イオンの拡
散速度が小さく、錯化合物を形成しやすいこととされて
いる。本発明者は、液の粘性を上げる物質として比較的
安価なグリセリンに着目し、それに各種の酸を添加した
電解液について平滑化能力を調査した結果、硫酸やりん
酸あるいは硝酸を添加しても平滑化されず、また、硝酸
は酸化性が高いため液調整時にグリセリンを酸化させ発
熱するため危険である。その点、塩酸はそのような危険
性も無く平滑化能力が高く、かつ光輝な表面が得られ、
りん酸とクロム酸混合液による電解研磨法と同等平滑性
を得ることが出来る。The function of electrolytic polishing using a mixed solution of hydrochloric acid and glycerin of the present invention will be described below. A general characteristic of the electrolytic polishing liquid is that it has a high viscosity with a concentrated oxidizing acid and a low diffusion rate of dissolved metal ions, and that a complex compound is easily formed. The present inventor has focused on relatively inexpensive glycerin as a substance for increasing the viscosity of the liquid, and as a result of investigating the smoothing ability of an electrolytic solution to which various acids are added, it is found that sulfuric acid, phosphoric acid or nitric acid is added. Since it is not smoothed and nitric acid has a high oxidizing property, it is dangerous because it heats up by oxidizing glycerin during liquid preparation. In that respect, hydrochloric acid has a high smoothing ability without such a danger, and a bright surface can be obtained.
It is possible to obtain the same smoothness as the electrolytic polishing method using a mixed solution of phosphoric acid and chromic acid.
【０００８】塩酸とグリセリン混合液による電解研磨方
法で、効率的に平滑化を行うには以下の条件が適切であ
ることを見出した。図１にＳＵＳ４３０の表面粗さにお
よぼす塩酸とグリセリン混合液の塩酸濃度とグリセリン
濃度の影響を示す。塩酸濃度は塩酸とグリセリン混合の
電解液１ｌ当たり３０ｇ以上でステンレス鋼に局部的な
侵食を生じること無く平滑化能力を有する。但し、塩酸
濃度を高くするに従って高価となることから前記の電解
液１ｌ当たり３０〜２００ｇが望ましい。グリセリンの
添加量は前記の電解液１ｌ当たり６００ｇ以上で平滑化
能力が得られ、飽和濃度までその能力を有するが、コス
トや作業性から６００〜１０００ｇが望ましい。It has been found that the following conditions are suitable for efficient smoothing in the electrolytic polishing method using a mixed solution of hydrochloric acid and glycerin. FIG. 1 shows the influence of the hydrochloric acid concentration and glycerin concentration of the hydrochloric acid / glycerin mixture on the surface roughness of SUS430. The concentration of hydrochloric acid is 30 g or more per liter of an electrolytic solution of a mixture of hydrochloric acid and glycerin, and the stainless steel has smoothing ability without causing local corrosion. However, the higher the concentration of hydrochloric acid becomes, the more expensive it becomes, so 30 to 200 g per liter of the electrolytic solution is desirable. When the amount of glycerin added is 600 g or more per liter of the electrolytic solution, the smoothing ability is obtained and the ability is achieved up to the saturated concentration, but 600 to 1000 g is preferable in terms of cost and workability.
【０００９】図２および図３に、電解液１ｌ当たり塩酸
１００ｇとグリセリンを７５０ｇ添加した電解液を用
い、温度５０℃で電解研磨処理したＳＵＳ４３０酸洗板
の電解処理後の表面粗さを示す。この図から、電解電流
密度が０.５Ａ／cm2を超えると平滑化されるものの、粒
界侵食が生じ表面品質を損なう。また、０.１Ａ／cm2未
満では平滑化能力が小さく長時間を要することから０.
１〜０.５Ａ／cm2が望ましい。また、電気量は１０クー
ロン以上が望ましい。FIGS. 2 and 3 show the surface roughness after electrolytic treatment of a SUS430 pickled plate electrolytically polished at a temperature of 50 ° C. using an electrolytic solution containing 100 g of hydrochloric acid and 750 g of glycerin per liter of electrolytic solution. From this figure, when the electrolytic current density exceeds 0.5 A / cm 2 , smoothing occurs, but grain boundary erosion occurs and the surface quality is impaired. If it is less than 0.1 A / cm 2 , the smoothing ability is small and it takes a long time.
1 to 0.5 A / cm 2 is desirable. Moreover, the amount of electricity is preferably 10 coulombs or more.
【００１０】電解溶液温度は、表面粗さに影響無く室温
でもその効果が得られるが、高い程短時間で効果が得ら
れる。但し、温度が９０℃を超えると液の蒸発が著し
く、また、作業性が悪くたるため９０℃以下が望まし
い。The effect of the electrolytic solution can be obtained even at room temperature without affecting the surface roughness, but the higher the temperature, the shorter the effect. However, when the temperature exceeds 90 ° C., the liquid evaporates remarkably and the workability deteriorates.
【００１１】[0011]
【実施例】本発明の実施例について説明する。ＳＵＳ４
３０とＳＵＳ３０４の酸洗板を用い、塩酸とグリセリン
混合の電解液で電解研磨して表面粗さを測定した結果を
表１に示す。なお、供試材の表面粗さはそれぞれＲａ１
９.５と１７.３μｍである。本発明法によれば表面欠陥
を生じること無く表面粗さ１０μｍ以下の平滑な表面が
得られる。EXAMPLES Examples of the present invention will be described. SUS4
Table 1 shows the results of electropolishing with an electrolytic solution containing hydrochloric acid and glycerin, using an acid-washed plate of No. 30 and SUS304, and measuring the surface roughness. The surface roughness of each sample is Ra1.
9.5 and 17.3 μm. According to the method of the present invention, a smooth surface having a surface roughness of 10 μm or less can be obtained without causing surface defects.
【００１２】[0012]
【表１】 [Table 1]
【００１３】[0013]
【発明の効果】以上の如く本発明方法によれば、平滑な
ステンレス鋼表面が得られ、これまでやむをえず高価あ
るいは有害な物質を含む電解法を使用していた分野、あ
るいは工業的規模で電解研磨を適用出来なかった分野に
適用することが可能となり、工業的な利益は極めて大き
い。INDUSTRIAL APPLICABILITY As described above, according to the method of the present invention, a smooth stainless steel surface can be obtained, and electrolysis is carried out in the field or industrial scale where the electrolytic method containing expensive or harmful substances is unavoidable. It can be applied to fields where polishing could not be applied, and the industrial advantage is extremely large.
【図１】はＳＵＳ４３０の表面粗さにおよぼす塩酸とグ
リセリン濃度の影響を示す図。FIG. 1 is a diagram showing the influence of hydrochloric acid and glycerin concentrations on the surface roughness of SUS430.
【図２】はＳＵＳ４３０の電解電流密度と表面粗さおよ
び粒界侵食状況を示す図。FIG. 2 is a diagram showing electrolytic current density, surface roughness, and grain boundary erosion of SUS430.
【図３】はＳＵＳ４３０の電解電気量と表面粗さの関係
を示す図。FIG. 3 is a diagram showing the relationship between the amount of electrolysis and the surface roughness of SUS430.
Claims (2)
とグリセリンの混合液を電解液として、該電解液中でス
テンレス鋼を陽極として電解処理することを特徴とする
ステンレス鋼の電解研磨方法。1. A method of electropolishing stainless steel, which comprises electrolytically treating a mixed solution of hydrochloric acid and glycerin as an electrolytic solution and using stainless steel as an anode in the electrolytic solution during the electrolytic polishing of stainless steel.
解液の濃度が電解液１ｌ当たり塩酸を３０〜２００ｇと
グリセリンを６００〜１０００ｇとするものであり、電
解の電流密度が０.１〜０.５Ａ／cm2でかつ電気量１０
クーロン以上であることを特徴とするステンレス鋼の電
解研磨方法。2. The electrolytic polishing method according to claim 1, wherein the concentration of the electrolytic solution is 30 to 200 g of hydrochloric acid and 600 to 1000 g of glycerin per liter of the electrolytic solution, and the current density of electrolysis is 0.1 to 0.1. 0.5 A / cm 2 and 10 electricity
A method for electropolishing stainless steel, characterized in that it is at least coulomb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9755293A JPH06306699A (en) | 1993-04-23 | 1993-04-23 | Method for electropolishing stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9755293A JPH06306699A (en) | 1993-04-23 | 1993-04-23 | Method for electropolishing stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06306699A true JPH06306699A (en) | 1994-11-01 |
Family
ID=14195412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9755293A Withdrawn JPH06306699A (en) | 1993-04-23 | 1993-04-23 | Method for electropolishing stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06306699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10026411B2 (en) | 2009-01-06 | 2018-07-17 | Skype | Speech encoding utilizing independent manipulation of signal and noise spectrum |
-
1993
- 1993-04-23 JP JP9755293A patent/JPH06306699A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10026411B2 (en) | 2009-01-06 | 2018-07-17 | Skype | Speech encoding utilizing independent manipulation of signal and noise spectrum |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000704 |