CN1150982A - Dynamic electrolytic composite polishing method of stainless steel equipment - Google Patents
Dynamic electrolytic composite polishing method of stainless steel equipment Download PDFInfo
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- CN1150982A CN1150982A CN 95119801 CN95119801A CN1150982A CN 1150982 A CN1150982 A CN 1150982A CN 95119801 CN95119801 CN 95119801 CN 95119801 A CN95119801 A CN 95119801A CN 1150982 A CN1150982 A CN 1150982A
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Abstract
A dynamically electrolytic compound polishing method for stainless steel apparatus used in chemical, textile and food industries features that sulfuric acid, phophoric acid, potassium ferricyanide, carboxymethylcellulose, and nonylphenolypolyoxyvinethene are used as raw materials of electrolyte which can be used at ordinary temp and under low current density. There is a liquid-sucking layer on surface of electrode. Its advantages include simple pretreatment and high polishing accuracy.
Description
The invention belongs to a kind of electrochemical surface polished finish technology, be specially adapted to main equipment and small-bore pipeline inwall electrolysis composite polishing.
For a long time, in industry production such as petrochemical complex, weaving, food, pharmacy, because some key equipment (as polymeric kettle, retort, material pipeline etc.) inside surface roughness is higher, cause some viscous material, powder etc. to be easy to generate wall built-up, scale formation, influence the equipment heat transfer efficiency, severe patient makes the equipment total blockage, is forced to out of service.For some inflammableness material, because the static concentration phenomenon exists easily to make material produce the hidden danger of spark blast,, require the equipment internal surface is carried out polished finish in order to address the above problem, improve surface smoothness.After the equipment polished finish, along with the also corresponding raising of its erosion resistance of raising of smooth finish.
For the large stainless steel equipment surface finish, adopt the manual machinery Ginding process usually in the prior art, used tool is electronic or pneumatic emery wheel or abrasive band, and this method exists that production efficiency is low, labour intensity is big and the not high shortcoming of polishing precision; Domestic polishing for the small-bore pipeline inwall does not still have effective measure at present.In order to obtain higher smooth finish, late nineteen eighties, the domestic appearance " electropolishing " novel process, promptly workpiece as anode, electrode is as negative electrode, and electrode and workpiece relatively move, and electrolytic solution is constantly delivered to the gap location of negative electrode and workpiece with pump, energising makes workpiece surface generation electrochemical dissolution, thereby makes workpiece surface obtain higher smooth finish.But in the prior art, require the workpiece original surface to possess higher smooth finish, generally more than 7 (Ra1.25), by electrochemical dissolution, smooth finish improves 3 grades at most, and consuming time longer merely.For reaching the workpiece that pre-treatment smooth finish requires, as small-bore pipeline inwall, device interior dead angle etc., simple electropolishing just can't be implemented like this.In addition, used electrolytic solution is HF, HClO in the prior art
4, nitrous acid, chromic acid system, there are shortcomings such as firing property and toxicity in this electrolytic solution.Moreover the prior art service temperature is higher, generally more than 70 ℃; Actuating current density is also higher, generally at 60A/dm
2More than, cause the field polish difficulty to increase, and cost improve.
The objective of the invention is to overcome above-mentioned problems of the prior art, a kind of large stainless steel equipment and small-bore pipeline field polish method of effectively being applicable to is provided, realization electropolishing and mechanical mill are carried out with machine synchronously, reach normal-temperature operation, non-environmental-pollution, nontoxic operation and the low purpose that consumes energy.
The solution that realizes the object of the invention be by direct supply 7 equipment as anode 6, electrolytic solution 1 is by circulation storage tank 2, infusion pump 3, tubing 4, arrive between the cathode and anode by negative electrode again, cathode and anode is done relative movement, it is characterized in that negative electrode has liquid-adsorption layer 12, electrolytic solution 1 is made up of sulfuric acid, phosphoric acid, the Tripotassium iron hexacyanide, carboxymethyl cellulose, polyoxyethylene nonylphenol ether, water.The electrolytic solution sulfuric acid content is 11～33%, and phosphorus acid content is 10～30%, and Tripotassium iron hexacyanide content is 0.06～0.90%, and carboxymethyl cellulose level is 0.2～0.6%, and polyoxyethylene nonylphenol ether content is 0.03～0.10%, and all the other are water.The negative electrode liquid-adsorption layer is glass wool or asbestos wool, with the cathode shape of anode contact surface be plane, curved surface, sphere.The cathode and anode spacing is 3～20mm, and actuating current density is 5～45A/dm
2, electrolytic solution is normal temperature.Advantage of the present invention is a normal-temperature operation, and electrolytic solution is nontoxic, nothing firing property, with low cost, and the workpiece pre-treatment is simple, and power consumption is low, polishing precision height.
Below in conjunction with accompanying drawing the present invention is described in further detail, Fig. 1 is a fundamental diagram of the present invention, and Fig. 2 is the A partial enlarged drawing of Fig. 1.
At first, negative electrode 5 is placed on polished the anode 6, the assurance cathode and anode can be moved easily Moving, with transfusion pump 3 electrolyte 1 in the storage tank 2 is made circulate electrolyte by woven hose 4, And the gap by cathode and anode, open dc source 7, and be adjusted to corresponding electric current, magnitude of voltage, Make then cathode and anode do relative motion, select different negative electrode shapes according to the geometry of different workpieces Shape, until movable cathode covers all wish polishing faces, this moment, polishing process finished.
Please see specific embodiment:
1: one diameter of example is 2.8 meters, high 6 meters 1Cr18Ni9Ti powder of stainless steel hopper, and its middle cylinder body is high 4 meters, and cone is high 2 meters, carries out the compound dynamic polished finish of electrolysis.The electrolyte prescription that adopts is: sulfuric acid 11%, phosphoric acid 30%, carboxymethyl cellulose 0.2%, the Tripotassium iron hexacyanide 0.1%, polyoxyethylene nonylphenol ether 0.03%, excess water.Service temperature: normal temperature.Cathode and anode is made spiral motion, cathode and anode relative moving speed 30～35cm/min, output voltage 12～20V, outward current 15～45A.The result: polishing front surface smooth finish is 7 (Ra1.25), is 13 (Ra0.020) after the polished finish.
2: one diameters of example are 3.0 meters, the 316L stainless steel cone that the cone height is 2.0 meters, and filling a prescription is: sulfuric acid 11%, phosphoric acid 30%, carboxymethyl cellulose 0.2%, the Tripotassium iron hexacyanide 0.1%, polyoxyethylene nonylphenol ether 0.03%, excess water.Service temperature: normal temperature.Cathode and anode is made spiral motion, cathode and anode relative moving speed 30～35cm/min, output voltage 12～20V, outward current 15～45A.The result: cone inwall polishing front surface is bright and clean to be 7 (Ra1.25), and the polishing back is 12 (Ra0.040).
3: one of examples are long 8 meters, and internal diameter is 50 millimeters 304 stainless steel pipes, and electrolyte prescription is: sulfuric acid 33%, and phosphatase 11 0%, carboxymethyl cellulose 0.6%, the Tripotassium iron hexacyanide 0.08%, polyoxyethylene nonylphenol ether 0.05%, surplus is a water.Service temperature: normal temperature.The anode and cathode relative moving speed is 20～30cm/min, output voltage 5～10V, and outward current 20～40A, the result: smooth finish is 4 (Ra10.0) before the inner-walls of duct polishing, the polishing back is 11 (Ra0.080).
The Stainless Steel Ball Valve of 4: one DN50mm of example adopts electrolyte prescription to be: sulfuric acid 11%, phosphoric acid 23%, carboxymethyl cellulose 0.3%, polyoxyethylene nonylphenol ether 0.06%, the Tripotassium iron hexacyanide 0.2%, excess water.Service temperature: normal temperature.Electric power output voltage 10～15V, outward current 15～20A.The result: polishing front surface smooth finish is 5 (Ra5.0), is 10 (Ra0.160) after the polished finish.
The glass roll of 5: one φ 200m of example, material are the high temperature stainless steel alloy, adopt electrolyte prescription to be: sulfuric acid 25%, phosphoric acid 30%, carboxymethyl cellulose 0.2%, the Tripotassium iron hexacyanide 0.1%, polyoxyethylene nonylphenol ether 0.05%, excess water.Service temperature: normal temperature.Electric power output voltage 10～15V, outward current 30～40A, the result: polishing front surface smooth finish is 7 (Ra1.25), is 12 (Ra0.040) after the polished finish.
Claims (7)
1. dynamic electrolytic composite polishing method of stainless steel equipment, be by direct supply 7, equipment (polished workpiece) as anode 6, electrolytic solution 1 is by circulation storage tank 2, infusion pump 3, tubing 4, arrive between the cathode and anode by negative electrode again, cathode and anode is done relative movement, it is characterized in that negative electrode has liquid-adsorption layer, and electrolytic solution 1 is made up of sulfuric acid, phosphoric acid, the Tripotassium iron hexacyanide, carboxymethyl cellulose, polyoxyethylene nonylphenol ether, water.
2. according to the said finishing method of claim 1, it is characterized in that the electrolytic solution sulfuric acid content is 11～33%, phosphorus acid content is 10～30%, Tripotassium iron hexacyanide content is 0.06～0.90%, carboxymethyl cellulose level is 0.2～0.6%, polyoxyethylene nonylphenol ether content is 0.03～0.10%, and all the other are water.
3. according to the said finishing method of claim 1, it is characterized in that the negative electrode liquid-adsorption layer is glass wool or asbestos wool.
4. according to claim 1,3 said finishing methods, it is characterized in that negative electrode and anodic contact surface are plane, curved surface, sphere.
5. according to claim 1,2 said finishing methods, it is characterized in that the cathode and anode spacing is 3～20mm.
6. according to claim 1,2 said finishing methods, it is characterized in that actuating current density is 5～45A/dm
2
7. according to claim 1,2 said finishing methods, it is characterized in that normal-temperature operation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95119801A CN1058303C (en) | 1995-11-20 | 1995-11-20 | Dynamic electrolytic composite polishing method of stainless steel equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95119801A CN1058303C (en) | 1995-11-20 | 1995-11-20 | Dynamic electrolytic composite polishing method of stainless steel equipment |
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| CN1150982A true CN1150982A (en) | 1997-06-04 |
| CN1058303C CN1058303C (en) | 2000-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN95119801A Expired - Fee Related CN1058303C (en) | 1995-11-20 | 1995-11-20 | Dynamic electrolytic composite polishing method of stainless steel equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127587C (en) * | 2000-02-01 | 2003-11-12 | 王彦辉 | Technology for electrolytically polishing net of stainless steel wire and its special equipment |
| CN101967674A (en) * | 2010-11-02 | 2011-02-09 | 北京三联虹普新合纤技术服务股份有限公司 | Electrolytic polishing process |
| CN101845663B (en) * | 2009-03-27 | 2012-03-07 | 比亚迪股份有限公司 | Electrolytic deplating solution and deplating method |
| CN1908248B (en) * | 2006-07-26 | 2012-09-05 | 沈阳工业大学 | Precision polishing technique for stainless steel printed circuit board |
| CN105332044A (en) * | 2015-11-24 | 2016-02-17 | 苏州盖德精细材料有限公司 | Novel chromic anhydride-free stainless steel electrolytic polishing solution and polishing process thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03501753A (en) * | 1988-10-21 | 1991-04-18 | ベロルススキ ポリテフニチェスキ インスティテュト | Electrochemical processing method for articles made of conductive materials |
| BE1003670A3 (en) * | 1990-02-23 | 1992-05-19 | Solvay | Baths and method for chemically polishing stainless steel surfaces. |
| CN1143123A (en) * | 1995-08-14 | 1997-02-19 | 白俄罗斯国立综合技术学院 | Polishing liquid for metal surface |
-
1995
- 1995-11-20 CN CN95119801A patent/CN1058303C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127587C (en) * | 2000-02-01 | 2003-11-12 | 王彦辉 | Technology for electrolytically polishing net of stainless steel wire and its special equipment |
| CN1908248B (en) * | 2006-07-26 | 2012-09-05 | 沈阳工业大学 | Precision polishing technique for stainless steel printed circuit board |
| CN101845663B (en) * | 2009-03-27 | 2012-03-07 | 比亚迪股份有限公司 | Electrolytic deplating solution and deplating method |
| CN101967674A (en) * | 2010-11-02 | 2011-02-09 | 北京三联虹普新合纤技术服务股份有限公司 | Electrolytic polishing process |
| CN101967674B (en) * | 2010-11-02 | 2015-08-26 | 北京三联虹普新合纤技术服务股份有限公司 | A kind of electrolytic polishing process |
| CN105332044A (en) * | 2015-11-24 | 2016-02-17 | 苏州盖德精细材料有限公司 | Novel chromic anhydride-free stainless steel electrolytic polishing solution and polishing process thereof |
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| Publication number | Publication date |
|---|---|
| CN1058303C (en) | 2000-11-08 |
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