CN1005116B - Corrosion resistance treatment method for stainless steel surface - Google Patents
Corrosion resistance treatment method for stainless steel surface Download PDFInfo
- Publication number
- CN1005116B CN1005116B CN87103570.7A CN87103570A CN1005116B CN 1005116 B CN1005116 B CN 1005116B CN 87103570 A CN87103570 A CN 87103570A CN 1005116 B CN1005116 B CN 1005116B
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- China
- Prior art keywords
- stainless steel
- potential value
- corrosion
- constant potential
- treatment
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 44
- 239000010935 stainless steel Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005260 corrosion Methods 0.000 title abstract description 33
- 230000007797 corrosion Effects 0.000 title abstract description 32
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 10
- 238000004381 surface treatment Methods 0.000 claims abstract description 5
- 230000010287 polarization Effects 0.000 claims description 13
- 238000002161 passivation Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000000704 physical effect Effects 0.000 abstract description 3
- 239000000243 solution Substances 0.000 abstract description 2
- -1 color Substances 0.000 abstract 1
- 239000002932 luster Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to a stainless steel surface corrosion resistance treatment method, which provides a stainless steel electrochemical surface treatment method by applying a constant potential technology and controlling a potential value, and HNO is utilized3The solution serves as an electrolyte solution. The method greatly improves the corrosion resistance of most stainless steel without changing other physical properties of the stainless steel, such as color, luster, strength, electrical conductivity, thermal conductivity and the like. The required treatment equipment and process are simple, and the conditions are mild. Easy industrialization and great economic benefit.
Description
The present invention relates to a kind of stainless steel electrochemical process for treating surface.
Metal finishing is by the method for physics and chemistry modification to be carried out in the metallic surface.In order to improve the erosion resistance of Stainless Steel Products, both can also can improve its solidity to corrosion from the new steel grade of angle development of metal metallurgy smelting by surface treatment.
Existing stainless steel surface conventional treatment method has the pre-passivation of metal, chemical oxidation and preoxidation etc., for example, in oxygen acid CONTROLLED POTENTIAL+0.5～+ the 0.8V passivation region handles, chemical oxidation is promptly at dense HNO
3Middle heated oxide is handled or preoxidation, promptly at high temperature carries out oxidation pre-treatment." metal finishing; chemistry and electrochemical surface conversion " book (" Metal Surface Treatment; Chemical and Electrochemical Surface Conversions ", Edited By MHGutcho, 1982.) combine the relevant patent of aforesaid method.
" the former state of salt hero, anti-food technology, 23(1974) 293 " have also discussed relevant technology such as chemical oxidation.
Above-mentioned conventional treatment method can improve tens times of corrosion resistance of metals.
U.S. Pat-3247086 provides the treatment process of the anti-spot corrosion of a kind of stainless steel, decorates corrosion resisting stainless steel goods, particularly Cr steel to make a kind of light thin, standard-sized anti-spot corrosion.The technological process of this method is tensile polishing stainless steel product such as stainless steel plate or steel band to be sent into the furnace high-temperature anneal of basic anaerobic.Stainless Steel Products after heat treatment carries out electrolysis treatment again, makes Stainless Steel Products pass through electrolyzer.With the water purification again of the Stainless Steel Products after the electrolysis treatment.The characteristics of this method are that pending Stainless Steel Products does not directly contact with power supply, avoid arcing to destroy Stainless Steel Products, adopt control current to carry out electrolysis treatment, and electrolysis section equipment is simpler relatively, and span of control is bigger, and electrolytic solution can have multiple as HNO
3, H
2SO
4, H
3PO
4, Na
2SO
4, NaOH etc. have pitting corrosion resistance preferably through the Stainless Steel Products after this method processing.
But this method mainly is suitable for 430 types (being 14-18Cr) stainless steel, and this kind stainless steel uses less at present, mainly is suitable for 430 type Stainless Steel Productss 1～1500 ℃ of special annealing treatment condition, logical rare gas element of anaerobic such as H
2, N
2, Ar, the cooling) under just produce effect.And equipment, complex process, electrode state is indeterminate during the control CURRENT OXIDATION, influence factor is many, not as the constant potential technology good.Simultaneously, use FeCl
36H
2The method of number hot spot numbers is because point has the depth after the O solution impregnation, and strict inadequately, from weightless data, this method only improves 2～3 times of solidity to corrosions, and suitability is narrow, the corrosion of anti-other form and to other medium such as H
2SO
4The solidity to corrosion poor effect.
Domestic achievement registration number 800803 discloses another kind of electrochemical process for treating " solidity to corrosion of stainless steel anode oxide film and the discussion of mechanism thereof " (Huang Guozhu etc., classification number TG174.41), and its electrochemical treatment condition is control electric current (10～20mA/cm
2), medium adopts H
2SO
4(20～30%)+Na
2MoO
4(0.1%), effect is for facing fruit dot erosion current potential Ep:500mV(0.1NNaCl), but through relevant department's examination, confirmed this achievement be false (appearing in the newspapers).
The purpose of this invention is to provide a kind of application constant potential technology, the CONTROLLED POTENTIAL value is carried out the electrochemical surface treatment process at certain voltage belt, and most of stainless corrosion resistance natures are increased substantially; And do not change other physicals of stainless steel itself, for example color, gloss, intensity, electroconductibility and thermal conductivity etc.; Required treatment facility and technology are simple, are easy to industrialization.
Concrete scheme of the present invention is to use the constant potential technology, will control its constant potential value and carry out anodic polarization processing, electrolyte solution HNO through the pretreated Stainless Steel Products of ordinary method as anode
3Perhaps with Stainless Steel Products earlier as negative electrode, control its constant potential value and carry out cathodic polarization and handle, again with it as anode, control its constant potential value and carry out anodic polarization and handle, and continue to change its constant potential value and carry out Passivation Treatment, electrolyte solution is also all used HNO
3
Above-mentioned be 1.0～1.7V(SCE) with Stainless Steel Products as the potential value that anode carries out being controlled when anodic polarization is handled, the polarization time was greater than 2 minutes.With Stainless Steel Products as the potential value that negative electrode carries out being controlled when cathodic polarization is handled be lower than-0.1V(SCE), the cathodic polarization time was greater than 1 minute.Above-mentioned Stainless Steel Products carries out anodic polarization handle after again the potential value of Passivation Treatment be 0.2～0.9V(SCE, the Passivation Treatment time was greater than 1 minute.
Electrolyte solution HNO
3Concentration be 0.1 to 10N.
The present invention has outstanding advantage compared with the prior art, and most of Stainless Steel Productss of handling through the present invention have good solidity to corrosion, comprises anti-local corrosion (spot corrosion, corrosion at a seam etc.) and anti-uniform corrosion.At first,, will handle with untreated 18-8 type stainless steel through the method for the invention and under different ambient conditions, carry out anti-corrosion test, can obviously find out on the resulting surface corrosion pattern electromicroscopic photograph from surface corrosion pattern aspect, as shown in table 1.It should be noted that when slight physical disturbance takes place the surface of stainless steel product of handling through the present invention, still do not influence its good solidity to corrosion.
Secondly, the outstanding advantage also of the present invention as can be seen from pitting attack critical potential aspect.Table 2 list through the method for the invention handled and the NaCl of untreated 18-8 type Stainless Steel Products at different concns in the spot corrosion critical potential.Test condition is a room temperature, and potential scanning speed is 180mV/min.Obviously, the spot corrosion critical potential is to estimate the general important parameter of pitting resistance of stainless steel, critical potential more just, then stainless corrosion-resistant ability is strong more.
Table 3 is listed respectively before and after the method for the invention is handled with table 4 and (is respectively: room temperature, 30%H in different test conditions
2SO
4, PARC332 corrosion measurement system; Room temperature, 20%H
2SO
4The comparison of the general corrosion parameter+3%NaCl PARC332 corrosion measurement system), usually, corrosion potential Ecorr more just, polarization resistance R
pBig more, corrosion current is more little, and then the erosion resistance of material is good more.From table, can find out obviously that the stainless steel corrosion resistance nature of handling through the present invention is greatly improved.
The zero-G test data of listing from table 5 as seen, its solidity to corrosion of stainless steel of handling through the present invention has improved about three orders of magnitude.
In addition, most of Stainless Steel Productss of handling through the present invention do not influence the physical properties of itself, for example surface color, glossiness, workability, intensity, wear resistance and electrical and thermal conductivity etc.Simultaneously, treatment unit of the present invention, technology are simple, and component is simple, and control is not easily polluted, and the treatment time is short, and power-saving, electrolytic solution can use repeatedly, and is economical and practical, is easy to industrialization.
Development along with science and technology and society, stainless output and consumption grow with each passing day, and are widely used in various industrial environments, for example chemical industry, oil, power, marine building finishing and foodstuffs industry etc., and more prevalent medical treatment and the daily family life of being applied to, its purpose is antirust.Yet common stainless steel is not a non-corrosive, and therefore, the present invention has very big meaning and economic benefit.
Accompanying drawing is stainless steel surface apparatus for electrochemical treatment figure.Wherein 1 ... potentiostat, 2 ... Stainless Steel Products, 3 ... electrolyzer, 4 ... supporting electrode, 5 ... electrolytic solution, 6 ... reference electrode.
Embodiment: with 18-8 type austenite stainless steel commonly used is sample, and example testing data is as shown in table 6.
Claims (4)
1, a kind of stainless steel electrochemical surface treatment method is characterized in that comprising the following steps.
A, carry out pre-treatment with ordinary method,
B, with Stainless Steel Products as anode, control its constant potential value and carry out anodic polarization and handle, its constant potential value is 1.0～1.7V(SCE, electrolyte solution HNO
3, its concentration is 0.1～10N, the anodic polarization time was greater than 2 minutes.
2, the described method of claim 1 is characterized in that, before step B, Stainless Steel Products as negative electrode, is controlled its constant potential value and is carried out cathodic polarization and handle, its constant potential value is lower than-0.1V(SCO), electrolyte solution HNO
3, its concentration is 0.1～10N, and the cathodic polarization time, continued to change its constant potential value and carries out Passivation Treatment after step B greater than 1 minute, and its potential value is 0.2～0.9V(SCE), electrolyte solution HNO
3, its concentration is 0.1～10N, the Passivation Treatment time was greater than 1 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103570.7A CN1005116B (en) | 1987-05-15 | 1987-05-15 | Corrosion resistance treatment method for stainless steel surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87103570.7A CN1005116B (en) | 1987-05-15 | 1987-05-15 | Corrosion resistance treatment method for stainless steel surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030621A CN1030621A (en) | 1989-01-25 |
| CN1005116B true CN1005116B (en) | 1989-09-06 |
Family
ID=4814486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87103570.7A Expired CN1005116B (en) | 1987-05-15 | 1987-05-15 | Corrosion resistance treatment method for stainless steel surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1005116B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450332B (en) * | 2003-02-28 | 2011-02-09 | 上海电力学院 | Material selection method of stainless steel tube condenser |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1068967C (en) * | 1996-02-08 | 2001-07-25 | 黄岩市恒光制冷配件厂 | Monostable pulse electromagnetic valve and electromagnetic relay drive circuit for AC |
| CN100999826B (en) * | 2006-01-09 | 2010-05-26 | 宝山钢铁股份有限公司 | Electrolyting passivating process for enhancing corrosion resisting proferty of continuous annealing IF steel cold rolling plate |
| CN104746123A (en) * | 2015-04-11 | 2015-07-01 | 常州大学 | Technical method for electrochemical modification on surface of 316L stainless steel |
| CN106086996B (en) * | 2016-08-24 | 2017-12-26 | 厦门双瑞船舶涂料有限公司 | A kind of composite surface treatment method for repairing passivation for stainless steel state of having got rusty |
| CN106350854B (en) * | 2016-09-14 | 2019-01-29 | 东南大学 | A kind of passivating method of chrome-bearing steel muscle |
| CN106835241A (en) * | 2016-12-26 | 2017-06-13 | 安徽宝恒新材料科技有限公司 | A kind of preparation method of wear-resisting type stainless steel |
| CN107378155A (en) * | 2017-05-31 | 2017-11-24 | 广东工业大学 | A kind of method for improving stainless steel surfaces electrical-chemistry method hole uniformity |
| CN107893253A (en) * | 2017-11-29 | 2018-04-10 | 马鞍山市恒特重工科技有限公司 | A kind of Wear-resisting steel plate for mining machinery |
| CN109338447B (en) * | 2018-11-13 | 2020-06-16 | 大连理工大学 | Stainless steel super-corrosion-resistant treatment method based on electrochemical removal of surface inclusions |
| CN110218968B (en) * | 2019-06-21 | 2020-01-31 | 牡丹江师范学院 | A method of low temperature liquid phase diffusion infiltration to improve corrosion resistance of steel surface |
| CN113737250A (en) * | 2021-08-27 | 2021-12-03 | 珠海复旦创新研究院 | Corrosion-resistant pre-passivation film and preparation method and application thereof |
| CN113684588B (en) * | 2021-09-04 | 2023-03-24 | 百事基材料（青岛）股份有限公司 | Pocket cloth containing bioactive components and preparation method thereof |
| CN115522204B (en) * | 2022-09-26 | 2024-08-09 | 中国科学院金属研究所 | Anodic polarization method for inhibiting microbial corrosion of marine engineering equipment |
| CN115449881B (en) * | 2022-09-26 | 2025-03-11 | 中国科学院金属研究所 | Anodic polarization method for inhibiting microbial corrosion of marine oil and gas pipelines |
-
1987
- 1987-05-15 CN CN87103570.7A patent/CN1005116B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450332B (en) * | 2003-02-28 | 2011-02-09 | 上海电力学院 | Material selection method of stainless steel tube condenser |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030621A (en) | 1989-01-25 |
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