CN1267750A - Process for scaling on alloy steel surface - Google Patents
Process for scaling on alloy steel surface Download PDFInfo
- Publication number
- CN1267750A CN1267750A CN 00102939 CN00102939A CN1267750A CN 1267750 A CN1267750 A CN 1267750A CN 00102939 CN00102939 CN 00102939 CN 00102939 A CN00102939 A CN 00102939A CN 1267750 A CN1267750 A CN 1267750A
- Authority
- CN
- China
- Prior art keywords
- steel
- pickling
- electrolyte
- electrolytic
- electrolysis
- 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
Abstract
The present invention belongs to the solution pickling of metal material and is used to scale the surface of alloy steel. The method of the present invention includes anode electrolytic pickling process, cathode electrolytic pickling process and alternate anode/cathode electrolytic pickling process. The electrolysis parameters include current density 80-300 A/sq dm, electrolytic temperature 20-50 deg.c and electrolysis period 1-5 min. The electrolyte consists of water solution of sulfuric acid and surfactant, which consists of sodium dodecyl bensosulfonate, alkylphenol ethoxylates and water. The present invention has obvious alloy steel scaling effect and no environmental pollution.
Description
The invention belongs to the field of pickling metal materials by using solution. The method is mainly suitable for removing the oxide skin on the surface of the alloy bar wire steel.
In general, the surface quality of a hot-rolled finished steel product should be checked, but scale is generated on the surface of the hot-rolled steel product, so that surface defects are accurately determined; the scale must first be removed. The conventional method of metallurgical plants is to remove the oxide skin on the surface of carbon steel and alloy steel by a chemical pickling process.
The principle of the existing chemical pickling process is as follows: the acid reacts with the FeO to partially dissolve the scale, and at the same time the acid reacts with the iron matrix, whereby the mechanical action of the hydrogen gas causes the Fe-containing iron, which is still undissolved but rather loose2O3And Fe3O4The scale of (2) is peeled off. In either pickling process, dissolution and exfoliation are effective, but the extent varies greatly depending on the type of steel, the concentration of the acid solution and the temperature. (chemical Pickling of Steel Material, first written by Tokyo, P8, 9, 10, science Press, 1993, production of wire by high-speed Rolling Mill, P391-410, Press for metallurgy industry, Inc.)，1995)。
For alloy steel hot-rolled bar and wire, especially Cr-Ni stainless steel, the main component of the oxide skin is Cr2O3And NiO, which is selected from chromium spinel (FeO. Cr)2O3) And nickel spinel (NiO. Cr)2O3) The oxide scale has the advantages of compact and tough structure, firm combination with a matrix, difficult removal by common acid cleaning, 50 minutes for removal even if sulfuric acid, hydrochloric acid and nitric acid are adopted, and more than 20 minutes for removal of the oxide scale when a strong corrosive hydrofluoric acid and nitric acid mixed acid solution is adopted. And the pickling solution needs to be heated. For this reason, the above-mentioned pickling methods for removing scale all have the following common disadvantages: firstly, the required pickling time is longer, the productivity is low, the cost is high, secondly, the pickling solution needs to be heated, the environmental pollution is serious, and thirdly, the loss of the pickled steel is large.
The invention aims to provide a methodfor removing oxide skin on the surface of alloy steel, which has the advantages of obvious effect on removing oxide skin on the surface of alloy steel, high removal speed and no pollution.
Aiming at the purposes, the invention adopts the following technical scheme:
the method for removing the oxide skin on the surface of the alloy steel is carried out on a conventional electrolysis device, and the device comprises an electrolysis bath, a direct current power supply, a current reversing switch, a sample clamp and related circuits.
The method for removing the oxide skin on the surface of the alloy steel can adopt three methods, namely an anode electrolytic pickling method, a cathode electrolytic pickling method and a cathode-anode alternate electrolytic pickling method. The three methods are now described as follows:
1. an anodic electrolytic pickling method is adopted, and the process steps are as follows:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) electrolyzing by taking steel to be treated as an anode, a conventional lead plate as a cathode and a direct-current power supply as an electrolysis power supply;
(3) the technological parameters during electrolysis are as follows:
current density 80-300A/dm2
The temperature of the electrolyte is 20-50 DEG C
The electrolysis time is 1-5min
(4) The electrolyte consists of a sulfuric acid aqueous solution and a surfactant, and the ratio (weight percent) of the electrolyte is as follows: 99.996-99.999% of sulfuric acid aqueous solution and 0.001-0.004% of surfactant;
the proportion (weight percent)of the sulfuric acid aqueous solution is as follows: 15-45% of sulfuric acid and 55-85% of water;
the surfactant consists of sodium dodecyl benzene sulfonate, alkylphenol polyoxyethylene and water, and the proportion (weight percent) is as follows: 60-80% of sodium dodecyl benzene sulfonate, 5-20% of alkylphenol polyoxyethylene and the balance of water;
(5) after electrolytic pickling, the steel is taken out, washed clean by water and then dried, and the pickling process is completed.
The surfactant in the electrolyte can accelerate the electrolysis process and improve the electrolysis speed, and is a good acid mist inhibitor which can inhibit acid mist generated when steel and the electrolyte react.
The anode electrolytic pickling method is suitable for high-alloy steel such as Cr-Ni stainless steel and the like. Using a steel material immersed in an electrolyte as the anode, the steel material having a surface with a low conductivity scale but a relatively large number of pores through which the current can be conducted to the surface of the base metal, the lower oxide Cr2O3Is oxidized into high-valence CrO3And easily dissolved in acid to become loose, and a large amount of oxygen generated at the anode rapidly peels off the scale. But at high current densities the base metal surface is rapidly in a passive state.
Anode electrode reaction formula:
2. adopts a cathode electrolytic pickling method, and comprises the following process steps:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) electrolyzing by taking steel to be treated as a cathode, a conventional lead plate as an anode and a direct-current power supply as an electrolysis power supply;
(3) the process parameters and the composition ratio of the electrolyte during electrolysis are the same as those of the anode electrolytic pickling method;
(4) after electrolytic pickling, the steel is taken out, washed clean by water and then dried, and the pickling process is completed.
The cathode electrolytic pickling method is suitable for carbon steel such as carbon steel, carbon spring steel and the like. Using a sample immersed in electrolyte as a cathode, and leading current to the surface of the base metal through oxide scale pores to cause hydrogen ion discharge on the surface of the cathode so as to lead indissolvable higher oxide Fe2O3And Fe3O4Reducing the iron into low-price FeO and pure iron, generating volume change to loosen oxide scale, and simultaneously permeating a large amount of molecular hydrogen generated on the surface of the cathode into the oxide scale to rapidly peel off the oxide scale, wherein the reaction formula is as follows:
3. the anode and cathode alternative electrolytic pickling method comprises the following process steps:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) firstly, taking steel to be treated as a cathode, a conventional lead plate as an anode and a direct-current power supply as an electrolysis power supply to carry out cathodic electrolysis pickling, and switching the current direction after electrolysis for 1-3 minutes, namely taking the steel to be treated as the anode and the conventional lead plate as the cathode to carry out anodic electrolysis pickling; the cathodic electrolytic pickling method and the anodic electrolytic pickling method are alternated once.
(3) The technological parameters and the electrolyte composition and the proportion adopted by the cathode and anode alternate electrolytic pickling method are the same as those adopted by the anode electrolytic pickling method.
(4) And taking out the steel after electrolytic pickling, washing the steel clean by using clear water, and drying to finish the pickling process.
The cathode-anode alternative electrolytic pickling method is suitable for removing the oxide skin of the medium-low alloy steel containing the alloy elements such as Si, Cr, Mn, Mo and the like, and integrates the effects of the cathode electrolytic pickling method and the anode electrolytic pickling method. The sample is firstly treated with cathodic electrolytic pickling, the current direction is switched and then the sample is treated with anodic electrolytic pickling, and the surface of the sample is treated with O2And H2Accelerate the scaling off of the oxide scale.
Compared with the prior art, the invention has the following advantages:
firstly, the effect of removing the oxide skin on the surface of the alloy steel is obvious.
Secondly, the oxide skin is removed quickly, and the steel can be cleaned only in 1-5min, so that the requirement of on-line quick surface inspection of the steel is met, the labor productivity is improved, and the cost is reduced.
Thirdly, the metal matrix is dissolved in a very small amount in the electrolytic process, and the loss is low. Can objectively and truly reflect the surface quality condition of the steel.
Fourthly, the equipment is reasonable in design, small in size, convenient and safe to operate and easy to master.
Fifthly, the electrolyte has good conductivity, wide applicability and no environmental pollution.
Sixthly, the electrolyte consumption is low, the service life is long, and the cost is low.
Examples
The anode electrolytic pickling method, the cathode electrolytic pickling method and the cathode-anode alternate electrolytic pickling method are adopted to respectively remove the surface oxide skin of three batches of different hot rolled steel. The types of pickling methods, the grades and specifications of treated steels, and the electrolyte compositions and formulation ratios adopted in the three batches are shown in table 1. The process parameters during pickling are shown in Table 2.
In the pickling processes of examples 1 and 2, it was observed that a large number of bubbles were generated on the surface of the steel material, and the scale was peeled off, and after 2 to 3 minutes, the scale was removed cleanly to expose the surface of the silver-white metal. Examples3, the oxide skin of the GCr15 bearing steel treated in the step 3 is thick and difficult to remove, and the electrolyte in the prior art does not work, the cathode and anode alternate electrolytic pickling method is adopted, cathode electrolysis is carried out for 2 minutes, the current direction is switched immediately, anode electrolysis is carried out for 1 minute, and the oxide skin is completely removed to expose the natural color surface of the metal.TABLE 1 pickling method, type of steel treatedand composition ratio of electrolyte used in examples
TABLE 2 examples Steel pickling Process parameters
Claims (3)
1. A method for removing oxide skin on the surface of alloy steel is characterized by adopting an anodic electrolytic pickling method, and comprises the following process steps:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) electrolyzing by taking steel to be treated as an anode, a conventional lead plate as a cathode and a direct-current power supply as an electrolysis power supply;
(3) the technological parameters during electrolysis are as follows:
current density of 80-300A/dm2
The temperature of the electrolyte is 20-50 DEG C
Electrolyzing for 1-5 min;
(4) the electrolyte consists of a sulfuric acid aqueous solution and a surfactant, and the ratio (weight percent) of the electrolyte is as follows: 99.996-99.999% of sulfuric acid aqueous solution and 0.001-0.004% of surfactant;
the proportion (weight percent) of the sulfuric acid aqueous solution is as follows: 15-45% of sulfuric acid and 55-85% of water;
the surfactant consists of sodium dodecyl benzene sulfonate, alkylphenol polyoxyethylene and water, and the proportion (weight percent) is as follows: 60-80% of sodium dodecyl benzene sulfonate, 5-20% of alkylphenol polyoxyethylene and the balance of water;
(5) after electrolytic pickling, the steel is taken out, washed clean by water and then dried, and the pickling process is completed.
2. A method for removing oxide skin on the surface of alloy steel is characterized by adopting a cathode electrolytic pickling method, and comprises the following process steps:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) electrolyzing by taking steel to be treated as a cathode, a conventional lead plate as an anode and a direct-current power supply as an electrolysis power supply;
(3) the technological parameters and the composition and the proportion of the electrolyte during electrolysis are the same as those of the anodic electrolytic pickling method;
(4) after electrolytic pickling, the steel is taken out, washed clean by water and then dried, and the pickling process is completed.
3. A method for removing oxide skin on the surface of alloy steel is characterized by adopting a positive and negative alternative electrolytic pickling method, and comprises the following process steps:
(1) placing steel to be treated in an electrolytic bath filled with electrolyte;
(2) firstly, taking steel to be treated as a cathode, a conventional lead plate as an anode and a direct-current power supply as an electrolysis power supply to carry out cathodic electrolysis pickling, and switching the current direction after electrolysis for 1-3 minutes, namely taking the steel to be treated as the anode and the conventional lead plate as the cathode to carry out anodic electrolysis pickling; the cathodic electrolytic pickling method and the anodic electrolytic pickling method are alternated once.
(3) The technological parameters and the electrolyte composition and the proportion adopted by the cathode and anode alternate electrolytic pickling method are the same as those adopted by the anode electrolytic pickling method.
(4) And taking out the steel after electrolytic pickling, washing the steel clean by using clear water, and drying to finish the pickling process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00102939 CN1131341C (en) | 2000-03-16 | 2000-03-16 | Process for scaling on alloy steel surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00102939 CN1131341C (en) | 2000-03-16 | 2000-03-16 | Process for scaling on alloy steel surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1267750A true CN1267750A (en) | 2000-09-27 |
| CN1131341C CN1131341C (en) | 2003-12-17 |
Family
ID=4576653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00102939 Expired - Fee Related CN1131341C (en) | 2000-03-16 | 2000-03-16 | Process for scaling on alloy steel surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1131341C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383294C (en) * | 2001-12-19 | 2008-04-23 | 材料开发中心股份公司 | Process and plant for descaling, pickling and finishing/passivating stainless steel strips, and strips so obtainable |
| WO2010108456A1 (en) * | 2009-03-27 | 2010-09-30 | Byd Company Limited | Stripping solution and electrolytic stripping method using the same |
| CN102260899A (en) * | 2010-05-25 | 2011-11-30 | 宝山钢铁股份有限公司 | Method for removing scale on surface of titanium/titanium alloy strip |
| CN102373498A (en) * | 2010-08-12 | 2012-03-14 | 贵州红林机械有限公司 | Anodic corrosion process of stainless steel part before chroming |
| CN102618912A (en) * | 2012-04-06 | 2012-08-01 | 柳州市红日焊丝制造有限公司 | Surface treatment process method before wiredrawing of welding wire |
| CN103160844A (en) * | 2011-12-15 | 2013-06-19 | 三菱综合材料株式会社 | Method of removing oxide film on surface of copper or copper-base alloy and copper or copper-base alloy recovered using the method |
| CN103343381A (en) * | 2013-07-08 | 2013-10-09 | 湖北交投四优钢科技有限公司 | High-frequency impulse and low-temperature quick derusting device and high-frequency impulse and low-temperature quick derusting method |
| CN103426652A (en) * | 2012-05-14 | 2013-12-04 | 海洋王照明科技股份有限公司 | Electrolyte for electric double-layer capacitor and preparing method thereof |
| CN103526223A (en) * | 2013-10-10 | 2014-01-22 | 车晋绥 | Electric brush for cleaning paint |
| CN104120438A (en) * | 2014-07-22 | 2014-10-29 | 中冶南方工程技术有限公司 | Pickling production method for hot-rolling 304 Austenitic stainless steel strip steel |
| CN104593842A (en) * | 2015-01-07 | 2015-05-06 | 上海应用技术学院 | Method for preparing metal coating on molybdenum substrate |
| CN104611759A (en) * | 2015-02-12 | 2015-05-13 | 广州市精源电子设备有限公司 | Polarity-variable pulse acid-pickling control method |
| CN110265170A (en) * | 2019-06-25 | 2019-09-20 | 华东理工大学 | The method of electrochemistry formated ferrite recycling treatment iron and steel pickling waste liquid |
| CN110763746A (en) * | 2019-10-21 | 2020-02-07 | 河北冀研能源科学技术研究院有限公司 | Online sodium surface electrode activator for power plant and application |
| CN113818070A (en) * | 2021-09-05 | 2021-12-21 | 白林森 | Aluminum alloy surface treatment method |
| CN114561685A (en) * | 2022-02-16 | 2022-05-31 | 中国建筑第二工程局有限公司 | Stainless steel welding seam and surface treatment method and device, terminal equipment and storage medium |
| CN114561685B (en) * | 2022-02-16 | 2024-05-03 | 中国建筑第二工程局有限公司 | Stainless steel welding seam and surface treatment method and device, terminal equipment and storage medium |
-
2000
- 2000-03-16 CN CN 00102939 patent/CN1131341C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100383294C (en) * | 2001-12-19 | 2008-04-23 | 材料开发中心股份公司 | Process and plant for descaling, pickling and finishing/passivating stainless steel strips, and strips so obtainable |
| WO2010108456A1 (en) * | 2009-03-27 | 2010-09-30 | Byd Company Limited | Stripping solution and electrolytic stripping method using the same |
| CN101845663B (en) * | 2009-03-27 | 2012-03-07 | 比亚迪股份有限公司 | Electrolytic deplating solution and deplating method |
| CN102260899A (en) * | 2010-05-25 | 2011-11-30 | 宝山钢铁股份有限公司 | Method for removing scale on surface of titanium/titanium alloy strip |
| CN102260899B (en) * | 2010-05-25 | 2013-04-03 | 宝山钢铁股份有限公司 | Method for removing scale on surface of titanium/titanium alloy strip |
| CN102373498A (en) * | 2010-08-12 | 2012-03-14 | 贵州红林机械有限公司 | Anodic corrosion process of stainless steel part before chroming |
| CN103160844A (en) * | 2011-12-15 | 2013-06-19 | 三菱综合材料株式会社 | Method of removing oxide film on surface of copper or copper-base alloy and copper or copper-base alloy recovered using the method |
| CN102618912A (en) * | 2012-04-06 | 2012-08-01 | 柳州市红日焊丝制造有限公司 | Surface treatment process method before wiredrawing of welding wire |
| CN103426652A (en) * | 2012-05-14 | 2013-12-04 | 海洋王照明科技股份有限公司 | Electrolyte for electric double-layer capacitor and preparing method thereof |
| CN103343381A (en) * | 2013-07-08 | 2013-10-09 | 湖北交投四优钢科技有限公司 | High-frequency impulse and low-temperature quick derusting device and high-frequency impulse and low-temperature quick derusting method |
| CN103526223A (en) * | 2013-10-10 | 2014-01-22 | 车晋绥 | Electric brush for cleaning paint |
| CN103526223B (en) * | 2013-10-10 | 2016-06-01 | 车晋绥 | Paint cleaning brush |
| CN104120438A (en) * | 2014-07-22 | 2014-10-29 | 中冶南方工程技术有限公司 | Pickling production method for hot-rolling 304 Austenitic stainless steel strip steel |
| CN104593842A (en) * | 2015-01-07 | 2015-05-06 | 上海应用技术学院 | Method for preparing metal coating on molybdenum substrate |
| CN104611759A (en) * | 2015-02-12 | 2015-05-13 | 广州市精源电子设备有限公司 | Polarity-variable pulse acid-pickling control method |
| CN110265170A (en) * | 2019-06-25 | 2019-09-20 | 华东理工大学 | The method of electrochemistry formated ferrite recycling treatment iron and steel pickling waste liquid |
| CN110763746A (en) * | 2019-10-21 | 2020-02-07 | 河北冀研能源科学技术研究院有限公司 | Online sodium surface electrode activator for power plant and application |
| CN113818070A (en) * | 2021-09-05 | 2021-12-21 | 白林森 | Aluminum alloy surface treatment method |
| CN113818070B (en) * | 2021-09-05 | 2023-09-19 | 重庆哈斯特铝板带有限公司 | Aluminum alloy surface treatment method |
| CN114561685A (en) * | 2022-02-16 | 2022-05-31 | 中国建筑第二工程局有限公司 | Stainless steel welding seam and surface treatment method and device, terminal equipment and storage medium |
| CN114561685B (en) * | 2022-02-16 | 2024-05-03 | 中国建筑第二工程局有限公司 | Stainless steel welding seam and surface treatment method and device, terminal equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1131341C (en) | 2003-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1131341C (en) | Process for scaling on alloy steel surface | |
| JP3647461B2 (en) | Cleaning of processed aluminum products | |
| US4663005A (en) | Electropolishing process | |
| US5366598A (en) | Method of using a metal substrate of improved surface morphology | |
| CN103160844A (en) | Method of removing oxide film on surface of copper or copper-base alloy and copper or copper-base alloy recovered using the method | |
| KR20000011380A (en) | Method for forming phosphate film on the steel wires and apparatus used therefore | |
| WO2001021855A1 (en) | Removal of metal oxide scale from metal products | |
| JPH0347999A (en) | Support metal having improved surface mor- phology | |
| Xue et al. | Effect of fluoride ions on the corrosion of aluminium in sulphuric acid and zinc electrolyte | |
| US3632490A (en) | Method of electrolytic descaling and pickling | |
| JP4352190B2 (en) | Descaling method of titanium material | |
| CN111676508A (en) | Electrolytic corrosion solution and application thereof | |
| RU1807099C (en) | Process for electrochemically removing nickel coatings from steel articles | |
| CN113818070B (en) | Aluminum alloy surface treatment method | |
| CN113122906B (en) | Electric release oil synergist | |
| JP2577619B2 (en) | Method and apparatus for descaling alloy steel strip | |
| Lee et al. | Metal removal rate of the electrochemical mechanical polishing technology for stainless steel-the electrochemical characteristics | |
| CN110449676B (en) | Processing pretreatment method for electrolytic grinding of high-chromium alloy based on NaOH electrolyte | |
| CN114438580B (en) | Metallographic etchant and erosion method suitable for nickel-molybdenum alloy | |
| CN113789565B (en) | Preparation method of high-stability aluminum alloy material | |
| US3262775A (en) | Stripping of chromium plate using a solution containing sulfamic acid and a water soluble chloride | |
| JP3112257B2 (en) | Method for electrolytic descaling of Ni annealed plate or Ni alloy annealed plate | |
| US20040011667A1 (en) | Process for electrolytic derusting of ferrous materials using natural seawater | |
| JP2630702B2 (en) | Method of peeling and recovering gold or platinum group metal coated on metal substrate and peeling and recovering apparatus | |
| CN110670104A (en) | Preparation method of ozone-treated micro-arc oxidation coating on surface of aluminum alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| ASS | Succession or assignment of patent right |
Owner name: JINNIU CO., LTD., DALIAN Free format text: FORMER OWNER: DALIAN IRON + STEEL GROUP CORP. LTD. Effective date: 20021114 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20021114 Address after: 116031 No. 4 Gong Xing Road, Ganjingzi District, Liaoning, Dalian Applicant after: Jinniu Co., Ltd., Dalian Address before: 116031 No. 4 Gong Xing Road, Ganjingzi District, Liaoning, Dalian Applicant before: Dalian Iron & Steel Group Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |