CN103255424A - Method for protecting cathode of steel gate in freshwater - Google Patents
Method for protecting cathode of steel gate in freshwater Download PDFInfo
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- CN103255424A CN103255424A CN2013101559333A CN201310155933A CN103255424A CN 103255424 A CN103255424 A CN 103255424A CN 2013101559333 A CN2013101559333 A CN 2013101559333A CN 201310155933 A CN201310155933 A CN 201310155933A CN 103255424 A CN103255424 A CN 103255424A
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Abstract
The invention discloses a method for protecting a cathode of a steel gate in freshwater. The method comprises the following steps of (1) adjusting the output voltage of a potentiostat and monitoring a reference potential when the steel gate is static; and (2) comparing the output voltage and the reference potential repeatedly, if offset, further adjusting the output voltage till the reference potential changes by less than 5% in certain time, then setting the voltage output by the potentiostat to be the voltage value of a direct current voltage device, and guaranteeing the voltage to be output constantly. The method adopts a constant voltage mode, when the water area of the gate is reduced, the water resistance is increased, and then the current is reduced, the electric current density of unit area is generally constant, the current density is constant, and the protective potential value is relatively stable.
Description
Technical field
The present invention relates to a kind of cathode protecting process for steel gate under the fresh water environment.
Background technology
The corrosion of metal process is electrochemical corrosion process basically, and present cathode protection technology is to solve the most important method of electrochemical metal etching problem, so cathodic protection system is also referred to as the electro-chemical protection system.Its principle of work is to utilize extraneous power supply that electronics is provided, and avoids the metal construction in the medium to be corroded.Cathodic protection system can effectively be avoided being embedded in the soil or the metallic substance that is immersed in the water is corroded.Cathodic protection system is divided into galvanic anode protection system and two kinds of forms of impressed current cathodic protection system; wherein impressed current cathodic protection system mainly is made up of supplementary anode, negative electrode, reference electrode, DC power supply device and supporting cable; DC power supply device is being undertaken the function of carrying protective current as the primary member of impressed current cathodic protection system.
Cathodic protection system is mainly protected the buried metal structure or is immersed in metallic structures in the water, and generally speaking, protected works is in metastable state, so, adopt potentiostatic mode protection more.During potentiostat work, output cathode is connected to supplementary anode by anode cable, and the output protection electric current flow to protected body structure surface by medium (soil or water), flows back to the potentiostat negative pole by cathode cable again.Galvanic current makes protected body structure surface generation cathodic polarization, by the potential difference between test reference electrode and the protected body, can understand the degree of polarization, when this potential value is in certain limit, can think what the metal construction formula was protected.
Therefore; conventional cathodic protection system adopts potentiostatic mode work more, namely sets a protection potential value, and potentiostat is adjusted the size of outward current automatically; make reference potential reach the protection potential that we set, this method is fit to for the metallic structures in soil and the water.
For metallic gate; because often folding; the protection area of gate (water receiving part) is not fixed; be often to change; in addition; be subjected to the restriction of condition; reference electrode generally can not be installed on the gate; this also causes when the gate folding, and the distance of reference electrode and gate changes, and this test result for current potential is influential; directly have influence on the accuracy of potential test; therefore, in the cathodic protection system of steel gate, adopt the potentiostatic mode operation to exist the situation of system's fluctuation of service.
Summary of the invention
The object of the invention provides the method that a kind of stability that improves the cathodic protection system operation is better protected the steel gate.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of cathode protecting process for steel gate under the fresh water environment, it comprises the steps:
(1), when the steel gate remains static, adjust the output voltage of potentiostat, monitor the reference potential value simultaneously;
(2), repeatedly carry out the comparison of output voltage and reference potential value, if be offset, continue to adjust output voltage, change within a certain period of time up to reference potential and to be not more than 5%, this moment, the voltage of potentiostat output namely was set at the magnitude of voltage of volts DS equipment, and kept this voltage constant output.
Optimally, in the step (2), carried out the monitoring of output voltage and reference voltage value every ten minutes.
Optimally, in the step (2), the reference potential value changed in 24 hours and is not more than at 5% o'clock, and output voltage is the setting voltage value of volts DS equipment.
By adopting technique scheme; the present invention has following technique effect: the present invention adopts the constant voltage mode operation; when gate water receiving area diminishes; it is big that water receiving resistance can become; electric current is along with diminishing; it is constant that the unit surface current density keeps substantially, and it is stable that constant current density, protection potential value also keep relatively.
Embodiment
Describe in further detail below in conjunction with the present invention of embodiment.
Embodiment one: gate remains static, adjust the output voltage of DC power supply device, monitoring reference potential value, make the reference potential value be in-1.000V(is with respect to copper/copper/saturated copper sulphate reference electrode, down with), check reference potential again after spending 10 minutes, if be offset, then continue to adjust output voltage, reference potential is in-1.000V, continue to adjust the output size, variation is not more than 5% in reference potential value 24 hours.This moment, output voltage was the setting voltage value of DC power supply device.
If adopt constant current mode work, during the gate action, the water receiving area can become big or diminish, and outward current is constant, and then the unit surface current density can respond diminishes or becomes greatly, and this will cause the variation of protection potential; When adopting potentiostatic mode, the gate action, the distance of reference electrode and gate changes, and will cause test result generation deviation, can not accurately obtain the protection potential value of gate, therefore, adopts potentiostatic mode also just to lose meaning.
The present invention adopts the constant voltage mode operation, and when gate water receiving area diminished, water receiving resistance can become greatly, and electric current is along with diminishing, and it is constant that the unit surface current density keeps substantially, and it is stable that constant current density, protection potential value also keep relatively.Reference potential is only as a kind of reference, rather than as the significant parameter of Controlling System operation, by changing mode of operation, improved the stability of cathodic protection system operation greatly, makes the steel gate obtain better protection.
Claims (3)
1. cathode protecting process that is used for steel gate under the fresh water environment, it is characterized in that: it comprises the steps:
(1), when the steel gate remains static, adjust the output voltage of potentiostat, monitor the reference potential value simultaneously;
(2), repeatedly carry out the comparison of output voltage and reference potential value, if be offset, continue to adjust output voltage, change within a certain period of time up to reference potential and to be not more than 5%, this moment, the voltage of potentiostat output namely was set at the magnitude of voltage of volts DS equipment, and kept this voltage constant output.
2. the cathode protecting process for steel gate under the fresh water environment according to claim 1 is characterized in that: in the step (2), carried out the monitoring of output voltage and reference voltage value every ten minutes.
3. the cathode protecting process for steel gate under the fresh water environment according to claim 1 is characterized in that: in the step (2), the reference potential value changed in 24 hours and is not more than at 5% o'clock, and output voltage is the setting voltage value of volts DS equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101559333A CN103255424A (en) | 2013-04-28 | 2013-04-28 | Method for protecting cathode of steel gate in freshwater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101559333A CN103255424A (en) | 2013-04-28 | 2013-04-28 | Method for protecting cathode of steel gate in freshwater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103255424A true CN103255424A (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101559333A Pending CN103255424A (en) | 2013-04-28 | 2013-04-28 | Method for protecting cathode of steel gate in freshwater |
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| CN (1) | CN103255424A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983343A (en) * | 2019-12-31 | 2020-04-10 | 浙江绍防防腐保温工程有限公司 | Intelligent detection, analysis and management platform for steel structure gate cathode protection system |
| CN114481141A (en) * | 2022-02-10 | 2022-05-13 | 深圳国能宸泰科技有限公司 | Method and equipment for protecting cathode of offshore wind turbine generator and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230677A (en) * | 1992-02-25 | 1993-09-07 | Osaka Gas Co Ltd | Corrosion preventive method for underground buried metallic pipe |
| EP1813698A1 (en) * | 2004-09-27 | 2007-08-01 | Aos Holding Company | Water storage device having a powered anode |
| CN201634765U (en) * | 2010-03-05 | 2010-11-17 | 宁波中科腐蚀控制工程技术有限公司 | Cathode protection system of steel water gate |
| CN101928945A (en) * | 2010-08-24 | 2010-12-29 | 中国船舶重工集团公司第七二五研究所 | Impressed current catholic protection device for ship |
-
2013
- 2013-04-28 CN CN2013101559333A patent/CN103255424A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05230677A (en) * | 1992-02-25 | 1993-09-07 | Osaka Gas Co Ltd | Corrosion preventive method for underground buried metallic pipe |
| EP1813698A1 (en) * | 2004-09-27 | 2007-08-01 | Aos Holding Company | Water storage device having a powered anode |
| CN201634765U (en) * | 2010-03-05 | 2010-11-17 | 宁波中科腐蚀控制工程技术有限公司 | Cathode protection system of steel water gate |
| CN101928945A (en) * | 2010-08-24 | 2010-12-29 | 中国船舶重工集团公司第七二五研究所 | Impressed current catholic protection device for ship |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110983343A (en) * | 2019-12-31 | 2020-04-10 | 浙江绍防防腐保温工程有限公司 | Intelligent detection, analysis and management platform for steel structure gate cathode protection system |
| CN114481141A (en) * | 2022-02-10 | 2022-05-13 | 深圳国能宸泰科技有限公司 | Method and equipment for protecting cathode of offshore wind turbine generator and storage medium |
| CN114481141B (en) * | 2022-02-10 | 2023-10-13 | 深圳国能宸泰科技有限公司 | Method, equipment and storage medium for protecting cathode of offshore wind turbine |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20160601 |
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