CN110230088B - Stain removal composition and stain removal method - Google Patents
Stain removal composition and stain removal method Download PDFInfo
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- CN110230088B CN110230088B CN201910598349.2A CN201910598349A CN110230088B CN 110230088 B CN110230088 B CN 110230088B CN 201910598349 A CN201910598349 A CN 201910598349A CN 110230088 B CN110230088 B CN 110230088B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
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Abstract
The present invention relates to a stain removal composition and a stain removal method. The decontamination composition comprises nitric acid with a final volume percentage of 2-5%, glycerol with a final volume percentage of 10-30%, nitrate with a final concentration of 80-140 g/L and oxalate with a final concentration of 5-25 g/L. The decontamination composition can lead the workpiece to be decontaminated to be smooth and have no pitting corrosion through the reasonable proportion among the four components of nitric acid, glycerol, nitrate and oxalate and the synergistic effect of the components; the waste liquid generated by the decontamination composition does not contain sulfur, phosphorus, halogen and other anionic components which are harmful to the metal surface of the nuclear facility waste liquid treatment system, and can be directly treated by the nuclear facility waste liquid treatment system.
Description
Technical Field
The invention relates to the field of radioactive pollutant treatment, in particular to a decontamination composition and a decontamination method.
Background
In nuclear systems such as nuclear power plants and nuclear power research institutes, the radioactive substances generated along with the operation of nuclear facilities and equipment cause surface contamination of metal parts. To ensure the health and safety of operators, surrounding public and the environment, it is necessary to control this contamination within safety standards to decontaminate parts contaminated with radioactive materials.
Currently, electrochemical decontamination methods are the main decontamination methods in the field of nuclear environmental protection. The electrochemical decontamination method is a method for achieving the decontamination purpose by dissolving pollutants on the metal surface through electrolysis to make the metal surface smooth.
One of the cores of the electrochemical method for removing radioactive pollutants is electrolyte, and the quality of the formula performance of the electrolyte directly influences the decontamination effect and the decontamination efficiency. The conventional electrochemical decontamination electrolyte is adopted for decontamination, so that pitting corrosion can be generated on the surface of a workpiece, and a large amount of waste liquid which cannot be directly treated by a nuclear facility waste liquid treatment system can be generated.
Disclosure of Invention
Based on this, there is a need for a decontamination composition that will render the work piece to be decontaminated smooth and free of pitting and that will not produce a decontamination effluent that cannot be directly processed by a nuclear facility effluent treatment system.
In addition, a decontamination method using the above decontamination composition is also provided.
A decontamination composition comprises nitric acid with a final volume percentage of 2-5%, glycerol with a final volume percentage of 10-30%, nitrate with a final concentration of 80-140 g/L and oxalate with a final concentration of 5-25 g/L.
The decontamination composition can lead the workpiece to be decontaminated to be smooth and have no pitting corrosion through the reasonable proportion among the four components of nitric acid, glycerol, nitrate and oxalate and the synergistic effect of the components; the waste liquid generated by the decontamination composition does not contain sulfur, phosphorus, halogen and other anionic components which are harmful to the metal surface of the nuclear facility waste liquid treatment system, and can be directly treated by the nuclear facility waste liquid treatment system.
In one embodiment, the nitrate salt is selected from at least one of sodium nitrate and potassium nitrate.
In one embodiment, the oxalate is selected from at least one of sodium oxalate and potassium oxalate.
In one embodiment, the detergent composition comprises 2.5-4% nitric acid by volume, 15-25% glycerol by volume, 90-130 g/L sodium nitrate and 10-20 g/L sodium oxalate.
In one embodiment, the stain removal composition comprises a final volume percent of 3% nitric acid, a final volume percent of 20% glycerol, a final concentration of 55g/L sodium nitrate, a final concentration of 55g/L potassium nitrate, a final concentration of 7.5g/L sodium oxalate, and a final concentration of 7.5g/L potassium oxalate.
In one embodiment, the raw materials for preparing the detergent composition further comprise a solvent selected from at least one of deionized water and pure water.
A method of decontamination comprising the steps of:
the decontamination composition is used for carrying out ultrasonic and electrolytic treatment on a workpiece to be decontaminated.
In one embodiment, in the step of performing ultrasonic and electrolytic treatment on the workpiece to be decontaminated, the current density is 200A/m2～300A/m2The ultrasonic frequency is 40 Hz-80 Hz, and the processing temperature is 25-40 ℃.
In one embodiment, after the step of performing ultrasonic and electrolytic treatment on the workpiece to be decontaminated, the method further comprises the step of cleaning and drying the surface of the workpiece to be decontaminated.
In one embodiment, the workpiece to be decontaminated is Z5CND13.04 martensitic stainless steel or Cr13 stainless steel.
Detailed Description
In order to facilitate an understanding of the present invention, a more complete description of the present invention is provided below. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
One embodiment of the stain removal composition includes 2% to 5% by volume nitric acid, 10% to 30% by volume glycerol, 80g/L to 140g/L nitrate, and 5g/L to 25g/L oxalate.
According to the proportion, water (deionized water or pure water) is used as a solvent to prepare the decontamination composition.
The decontamination composition adopts a nitric acid system, so that the defects of large waste liquid amount, complex treatment and high cost of a sulfuric acid system and an oxalic acid system are effectively overcome. The oxalate in the decontamination composition can well complex metal ions such as iron ions, chromium ions and the like, is beneficial to dissolving the metal ions at the anode and inhibiting the metal ions from being separated out at the cathode.
Glycerol (commonly known as glycerin) in the stain removal composition can reduce the roughness of the metal surface and make the stain removal work-piece smoother.
HNO3Nitric acid, a strong oxidizer, rapidly corrodes and decomposes the contamination on the surface of the article to be decontaminated, so that contaminants such as radioactive substances are removed from the article to be decontaminatedAnd (4) separating.
The nitrate is HNO3The salt formed by the reaction with the metal can be used as a strong oxidizing agent in an acidic aqueous solution to decompose pollutants on the piece to be decontaminated and reduce the influence on the piece to be decontaminated, so that the piece to be decontaminated can be normally and repeatedly used after decontamination.
In one embodiment, the nitrate is at least one selected from sodium nitrate and potassium nitrate. Further, the nitrate comprises sodium nitrate and potassium nitrate, and the mass ratio of the sodium nitrate to the potassium nitrate is 0.8: 1-1.2: 1. Further, the mass ratio of sodium nitrate to potassium nitrate was 1.
In one embodiment, the oxalate is at least one selected from sodium oxalate and potassium oxalate. Furthermore, the oxalate comprises sodium oxalate and potassium oxalate, and the mass ratio of the sodium oxalate to the potassium oxalate is 0.8: 1-1.2: 1. Further, the mass ratio of sodium oxalate to potassium oxalate was 1.
Preferably, the decontamination composition comprises 3% by volume nitric acid, 20% by volume glycerol, 55g/L sodium nitrate, 55g/L potassium nitrate, 7.5g/L sodium oxalate and 7.5g/L potassium oxalate.
The sodium nitrate has good conductivity, can realize high decontamination speed and high decontamination efficiency, and the sodium oxalate has the function of uniformly distributing current on the surface of a decontamination workpiece and can reduce the roughness of the surface of the decontamination workpiece.
The decontamination composition can lead the workpiece to be decontaminated to be smooth and have no pitting corrosion through the reasonable proportion among the three components of nitric acid, nitrate and oxalate and the synergistic effect of the components; the waste liquid generated by the decontamination composition does not contain sulfur, phosphorus, halogen and other anionic components which are harmful to the metal surface of the nuclear facility waste liquid treatment system, and can be directly treated by the nuclear facility waste liquid treatment system.
An embodiment decontamination method includes the steps of: ultrasonic and electrolytic treatment of a workpiece to be decontaminated with the decontamination composition of any of the above. Specifically, in the step of carrying out ultrasonic and electrolytic treatment on the workpiece to be decontaminated, the current density is 200A/m2～300A/m2The ultrasonic frequency is 40 Hz-80 Hz, and the processing temperature is 25-40 ℃.
Further, after the ultrasonic and electrolytic treatment steps, the method also comprises the steps of cleaning and drying the surface of the workpiece to be decontaminated. And further, cleaning the to-be-decontaminated part subjected to ultrasonic and electrolytic treatment by using deionized water. The drying mode is drying or air drying. Further, the cleaning method is soaking or spraying. The cleaning temperature is 23-27 ℃.
The workpiece to be decontaminated is metal and can conduct electricity, and pollutants on the surface of the metal are dissolved through electrolysis, so that the pollutants are separated from the surface of the metal and are dissolved in electrolyte, and the surface of the metal is smooth, so that the purpose of decontamination is achieved. In one embodiment, the piece to be decontaminated is Z5CND13.04 martensitic stainless steel or Cr13 stainless steel. Further, the piece to be decontaminated is Z5CND13.04 martensitic stainless steel. It is to be understood that the member to be cleaned is not limited to the above-indicated members, and may be other members to be cleaned.
The existing decontamination process mainly adopts a decontaminating agent to carry out chemical treatment on a piece to be decontaminated, has small decontamination coefficient and more generated waste liquid, and meanwhile, in order to improve the decontamination effect, the decontaminating agent with strong corrosivity is often adopted, the piece to be decontaminated is seriously corroded, and the repeated cyclic utilization of the piece to be decontaminated is not facilitated.
The decontamination composition can efficiently remove radioactive pollutants on the surface of a metal workpiece by reasonable proportioning of four components of nitric acid, glycerol, nitrate and oxalate and the synergistic effect of the components and combining ultrasonic and electrolytic treatment processes. And the generated waste liquid does not contain sulfur, phosphorus, halogen and other anion components which are harmful to the metal surface of the nuclear facility waste liquid treatment system, and can be directly treated by the nuclear facility waste liquid treatment system.
The following are specific examples.
Unless otherwise specified, the following examples do not include other components except inevitable impurities. The examples, which are not specifically illustrated, employ drugs and equipment, all of which are conventional in the art. The experimental procedures, in which specific conditions are not noted in the examples, were carried out according to conventional conditions, such as those described in the prior art or those recommended by the manufacturer.
In the following examples, HNO is not specifically shown3Added as nitric acid and glycerol as glycerol. The workpieces to be decontaminated are all plates, the length of each plate is 50mm, the width of each plate is 10mm, and the thickness of each plate is 3 mm. The water is deionized water.
Example 1
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 2
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 3
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 4
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 5
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In mL of the decontamination composition, the workpieces to be decontaminated are connectedConnecting power supply anode, turning on power supply, and simultaneously performing ultrasonic and electrolytic treatment on the workpiece to be decontaminated at current density of X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 6
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Example 7
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Comparative example 1
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Comparative example 2
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Comparative example 3
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21mL of a stain removal compositionConnecting the workpiece to be decontaminated with the anode of the power supply, turning on the power supply, and simultaneously performing ultrasonic and electrolytic treatment on the workpiece to be decontaminated at a current density of X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Comparative example 4
The decontamination process of the workpiece to be decontaminated of this example is as follows:
(1) the raw materials for preparing the stain removal composition were mixed according to table 1 to obtain the stain removal composition.
(2) Soaking the workpiece to be decontaminated in X according to the process parameters of Table 21In the mL decontamination composition, a workpiece to be decontaminated is connected with a power supply anode, the power supply is switched on, the workpiece to be decontaminated is simultaneously subjected to ultrasonic treatment and electrolytic treatment, and the current density is X2A/m2The frequency of the ultrasonic wave is X3Hz, temperature T1At t deg.C for a treatment time of1 min。
(3) And taking out the workpiece subjected to ultrasonic and electrolytic treatment, washing the workpiece by using deionized water at normal temperature, and drying the washed workpiece to obtain the decontaminated workpiece.
Comparative example 5
The stain removal process for the work piece to be decontaminated of this example was substantially the same as that of example 5, except that the stain removal composition of this example was a commercially available IMC-03 lot stain removal agent.
TABLE 1 work pieces to be decontaminated and raw materials for preparing decontamination compositions of examples 1 to 7 and comparative examples 1 to 4
TABLE 2 Process parameters for the decontamination procedure of the work pieces to be decontaminated of examples 1 to 7 and comparative examples 1 to 5
And (3) testing the decontamination effect: the stain removal effect and the effect on the work pieces to be stained of each example and comparative example were measured. Wherein, the corrosion speed of the workpiece to be decontaminated in the decontamination process is measured by adopting a mass difference method; measuring the decontamination efficiency (namely decontamination rate) of the workpiece to be decontaminated by adopting an energy spectrum detection method; measuring the roughness change condition of the workpiece to be decontaminated obtained before and after decontamination by adopting a laser copolymerization coking method, wherein the roughness change refers to the difference value of the roughness before decontamination and the roughness after decontamination; measuring the removal effect of radioactive Co pollutants on a workpiece to be decontaminated by adopting a radioactive isotope pollutant simulation method; the results are shown in Table 3.
TABLE 3 decontamination Effect and Effect on the work pieces to be decontaminated of examples and comparative examples
As can be seen from Table 3, the decontamination efficiency of the decontamination composition and the decontamination method of examples 1-7 is 90% -95%, i.e. examples 1-7 can remove 90% -95% of the pollutants on the workpiece to be decontaminated, which is significantly higher than the decontamination electrolyte (83%) sold in comparative example 5; in addition, the decontamination compositions of examples 1 to 7 can remove 89% to 95% of Co pollutants on the workpiece to be decontaminated, which is significantly higher than the decontamination electrolyte (80%) sold in comparative example 5, and thus the decontamination composition of the embodiment has a good decontamination effect and can well remove radioactive pollutants on the workpiece to be decontaminated. Meanwhile, the corrosion rate of the workpiece to be decontaminated in examples 1 to 7 is 0.065 μm/min to 0.125 μm/min, which is lower than the corrosion rate (0.133 μm/min) of comparative example 5, which shows that the decontamination process of the embodiment can reduce the corrosion effect of the workpiece to be decontaminated and reduce the influence on the metal substrate. Among them, example 6 has the highest decontamination efficiency, low corrosion rate, and minimal effect on the surface of the workpiece to be decontaminated.
The decontamination composition can efficiently remove radioactive pollutants on the surface of a metal workpiece through reasonable proportioning among the four components of nitric acid, glycerol, nitrate and oxalate and the synergistic effect of the components.
The generated waste liquid does not contain sulfur, phosphorus, halogen and other anionic components which are harmful to the metal surface of the nuclear facility waste liquid treatment system, and can be directly treated by the nuclear facility waste liquid treatment system.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The decontamination composition is characterized by comprising 2-5% of nitric acid in percentage by volume, 10-30% of glycerol in percentage by volume, 80-140 g/L of nitrate in concentration and 5-25 g/L of oxalate in concentration.
2. The stain removal composition of claim 1 wherein the nitrate salt is selected from at least one of sodium nitrate and potassium nitrate.
3. The stain removal composition of claim 1, wherein the oxalate salt is selected from at least one of sodium oxalate and potassium oxalate.
4. The decontamination composition of any of claims 1-3, wherein the decontamination composition comprises nitric acid at a final volume percentage of 2.5% to 4%, glycerol at a final volume percentage of 15% to 25%, sodium nitrate at a final concentration of 90g/L to 130g/L, and sodium oxalate at a final concentration of 10g/L to 20 g/L.
5. The stain removal composition of claim 4, wherein the stain removal composition comprises 3% nitric acid by volume, 20% glycerol by volume, 55g/L sodium nitrate, 55g/L potassium nitrate, 7.5g/L sodium oxalate and 7.5g/L potassium oxalate.
6. The stain removal composition of claim 1 wherein the raw materials from which the stain removal composition is prepared further comprise a solvent selected from at least one of deionized water and purified water.
7. A method of decontamination, comprising the steps of:
ultrasonic and electrolytic treatment of a workpiece to be decontaminated with the decontamination composition of any of claims 1-6.
8. The decontamination method of claim 7, wherein in the step of ultrasonically and electrolytically treating the workpiece to be decontaminated, the current density is 200A/m2～300A/m2The ultrasonic frequency is 40 Hz-80 Hz, and the processing temperature is 25-40 ℃.
9. The decontamination method of claim 7, further comprising the step of cleaning and drying the surface of the workpiece to be decontaminated after the step of ultrasonically and electrolytically treating the workpiece to be decontaminated.
10. The decontamination method of claim 7, wherein the workpiece to be decontaminated is Z5CND13.04 martensitic stainless steel or Cr13 stainless steel.
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| GB1142776A (en) * | 1967-09-29 | 1969-02-12 | Szmuel Raviv | Decontamination of radioactively contaminated equipment |
| JPS5931898A (en) * | 1982-08-17 | 1984-02-21 | Chobe Taguchi | Rust removing solution for electrolysis |
| US4481090A (en) * | 1984-01-23 | 1984-11-06 | The United States Of America As Represented By The United States Department Of Energy | Decontaminating metal surfaces |
| JPS61257498A (en) * | 1985-05-08 | 1986-11-14 | Ishikawajima Harima Heavy Ind Co Ltd | Combined ultrasonic and electrolytic polishing method |
| JPH10123293A (en) * | 1996-10-18 | 1998-05-15 | Toshiba Corp | Method and device for chemical decontamination |
| CN1988051A (en) * | 2005-12-19 | 2007-06-27 | 中国辐射防护研究院 | Pollutant removing process and pollutant removing agent for radioactive pollution metal |
| CN100577893C (en) * | 2005-12-23 | 2010-01-06 | 中国辐射防护研究院 | Electrolytic decontaminating method for removing radioactive contaminant from metal surface |
| CN104162520A (en) * | 2013-05-17 | 2014-11-26 | 姚明勤 | Supersonic, strong-magnetic, chemical and full-automatic decontamination method for radioactive contamination of nuclear facilities |
| CN104389011B (en) * | 2014-11-27 | 2017-01-18 | 中国原子能科学研究院 | Electrochemical decontamination electrolyte |
| CN104878442A (en) * | 2015-06-19 | 2015-09-02 | 上海脉诺金属表面处理技术有限公司 | Non-phosphorus electrolytic polishing liquid and technology for polishing workpiece surfaces with same |
| CN105132999B (en) * | 2015-09-08 | 2017-11-21 | 江苏理工学院 | Electrolyte for double-peak pulse current electrochemical composite mechanical finishing processing of 42CrMo steel gear |
| CN107170503B (en) * | 2017-06-02 | 2019-04-02 | 苏州热工研究院有限公司 | A kind of chemical cleaning method reducing in-service PWR nuclear power plant collective dose |
| CN109402717A (en) * | 2018-12-24 | 2019-03-01 | 中国工程物理研究院材料研究所 | A kind of electrolytic decontaminating method |
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