CN110230088A - Cleansing composition and decontamination method - Google Patents

Cleansing composition and decontamination method Download PDF

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Publication number
CN110230088A
CN110230088A CN201910598349.2A CN201910598349A CN110230088A CN 110230088 A CN110230088 A CN 110230088A CN 201910598349 A CN201910598349 A CN 201910598349A CN 110230088 A CN110230088 A CN 110230088A
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CN
China
Prior art keywords
workpiece
decontaminated
cleansing composition
decontamination
nitrate
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CN201910598349.2A
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Chinese (zh)
Inventor
何小平
赵滢
张惠炜
张伟
王浩宇
洪振旻
姜磊
张宇宏
何继强
彭珍琳
Original Assignee
岭东核电有限公司
中广核核电运营有限公司
大亚湾核电运营管理有限责任公司
中国广核集团有限公司
中国广核电力股份有限公司
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Priority to CN201910598349.2A priority Critical patent/CN110230088A/en
Publication of CN110230088A publication Critical patent/CN110230088A/en

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    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25FPROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F1/00Electrolytic cleaning, degreasing, pickling or descaling
    • C25F1/02Pickling; Descaling
    • C25F1/04Pickling; Descaling in solution
    • C25F1/06Iron or steel

Abstract

The present invention relates to a kind of cleansing composition and decontamination methods.Cleansing composition includes the oxalates of nitric acid, the glycerine that final volume percentage is 10%~30%, the nitrate of final concentration of 80g/L~140g/L and final concentration of 5g/L~25g/L that final volume percentage is 2%~5%.Above-mentioned cleansing composition can make the smooth no spot corrosion of workpiece to be decontaminated by the synergistic effect of reasonable proportion and each component between four kinds of nitric acid, glycerine, nitrate and oxalates components;Generating the waste liquid of cleansing composition, sulfur-bearing, phosphorus and halogen etc. do not endanger the anion component of nuclear facilities liquid waste treatment system metal surface, can directly be handled by nuclear facilities liquid waste treatment system.

Description

Cleansing composition and decontamination method

Technical field

The present invention relates to radioactive pollutant process fields, more particularly to a kind of cleansing composition and decontamination method.

Background technique

In the cores systems such as nuclear power plant, nuclear power research institute, along with the operation of nuclear facilities equipment, the radioactivity of generation Substance can cause surface contamination to metal parts.For the health and safety for ensuring operator, the periphery public and environment, need By this contamination control within safety standard, decontamination is carried out to the component by radioactive material contamination.

Currently, electrochemical decontamination method is the main decontamination method of core environment protection field.Electrochemical decontamination method, which refers to, to be passed through The pollutant of electrodissolution metal surface keeps metal surface smooth, to reach a kind of method of decontamination purpose.

One of core that electrochemical process removes radioactive pollutant is electrolyte, the superiority and inferiority of electrolyte prescription performance, directly Influence clean effect and detersive efficiency.Using traditional electrochemical decontamination electrolyte decontamination, spot corrosion can be generated to workpiece surface, And the waste liquid that largely cannot be directly handled by nuclear facilities liquid waste treatment system can be generated.

Summary of the invention

Based on this, it is necessary to which providing one kind makes the smooth no spot corrosion of workpiece to be decontaminated, and will not generate and cannot directly be set by core Apply the cleansing composition of the decontamination waste liquid of liquid waste treatment system processing.

In addition, also providing a kind of decontamination method using above-mentioned cleansing composition.

A kind of cleansing composition, the cleansing composition include the nitric acid that final volume percentage is 2%~5%, whole body Product percentage be 10%~30% glycerine, final concentration of 80g/L~140g/L nitrate and final concentration of 5g/L~ The oxalates of 25g/L.

Above-mentioned cleansing composition passes through the reasonable proportion between four kinds of nitric acid, glycerine, nitrate and oxalates components And the synergistic effect of each component, the smooth no spot corrosion of workpiece to be decontaminated can be made;Generate cleansing composition waste liquid not sulfur-bearing, Phosphorus and halogen etc. endanger the anion component of nuclear facilities liquid waste treatment system metal surface, can be directly by nuclear facilities waste liquid The processing of reason system.

The nitrate is selected from least one of sodium nitrate and potassium nitrate in one of the embodiments,.

The oxalates is selected from least one of sodium oxalate and potassium oxalate in one of the embodiments,.

In one of the embodiments, the cleansing composition include final volume percentage be 2.5%~4% nitric acid, The sodium nitrate and final concentration of 10g/ of glycerine, final concentration of 90g/L~130g/L that final volume percentage is 15%~25% The sodium oxalate of L~20g/L.

The cleansing composition includes the nitric acid, final volume that final volume percentage is 3% in one of the embodiments, Glycerine that percentage is 20%, the sodium nitrate of final concentration of 55g/L, final concentration of 55g/L potassium nitrate, final concentration of The potassium oxalate of the sodium oxalate of 7.5g/L and final concentration of 7.5g/L.

The raw material for preparing the cleansing composition in one of the embodiments, further includes solvent, and the solvent is selected from and goes At least one of ionized water and pure water.

A kind of decontamination method, includes the following steps:

Ultrasound and electrolysis processing processing are carried out to workpiece to be decontaminated with above-mentioned cleansing composition.

Workpiece to be decontaminated is carried out described in the step of ultrasound and electrolysis processing in one of the embodiments, electric current Density is 200A/m2~300A/m2, ultrasonic frequency is 40Hz~80Hz, and treatment temperature is 25 DEG C~40 DEG C.

After carrying out the step of ultrasound and electrolysis processing to workpiece to be decontaminated described in one of the embodiments, also Include the steps that cleaning and drying the workpiece surface to be decontaminated.

The workpiece to be decontaminated is that Z5CND13.04 martensitic stain less steel or Cr13 are stainless in one of the embodiments, Steel.

Specific embodiment

To facilitate the understanding of the present invention, below to invention is more fully described.But the present invention can be to be permitted Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is It makes the disclosure of the present invention more thorough and comprehensive.

Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention The normally understood meaning of technical staff it is identical.Term as used herein in the specification of the present invention is intended merely to retouch State the purpose of specific embodiment, it is not intended that in the limitation present invention.

The cleansing composition of one embodiment, the cleansing composition include final volume percentage be 2%~5% nitric acid, The nitrate and final concentration of 5g/L of glycerine, final concentration of 80g/L~140g/L that final volume percentage is 10%~30% The oxalates of~25g/L.

It is that solvent configures above-mentioned cleansing composition with water (deionized water or pure water) according to said ratio.

It should be noted that above-mentioned cleansing composition selects nitric acid system, sulfuric acid system and oxalic acid system are effectively improved Waste liquid amount it is big, processing is complicated, disadvantage at high cost.Oxalates in cleansing composition, can be good at chelated iron ion with The metal ions such as chromium ion facilitate metal ion in anodic solution, and it is inhibited to be precipitated in cathode.

Glycerine (being commonly called as glycerol) in cleansing composition, it can reduce Metal Surface Roughness, make decontamination workpiece more Add smooth.

HNO3That is nitric acid, a kind of strong oxidizer, can fast erosion decompose the dirty of part surface to be decontaminated so that radiation The pollutants such as property substance are separated from part to be decontaminated.

Nitrate is HNO3The salt formed with metal reaction can be used as strong oxidizer in acidic aqueous solution, to divide The pollutant on part to be decontaminated is solved, the influence to part to be decontaminated is reduced, so that part to be decontaminated can normally repeat benefit after decontamination With.

Above-mentioned nitrate is selected from least one of sodium nitrate and potassium nitrate in one of the embodiments,.Further Ground, nitrate includes sodium nitrate and potassium nitrate, and the mass ratio of sodium nitrate and potassium nitrate is 0.8: 1~1.2: 1.Further Ground, the mass ratio of sodium nitrate and potassium nitrate are 1.

Above-mentioned oxalates is selected from least one of sodium oxalate and potassium oxalate in one of the embodiments,.Further Ground, oxalates includes sodium oxalate and potassium oxalate, and the mass ratio of sodium oxalate and potassium oxalate is 0.8: 1~1.2: 1.Further The mass ratio of ground, sodium oxalate and potassium oxalate is 1.

Preferably, above-mentioned cleansing composition include final volume percentage be 3% nitric acid, final volume percentage be 20% Glycerine, the sodium nitrate of final concentration of 55g/L, the potassium nitrate of final concentration of 55g/L, final concentration of 7.5g/L sodium oxalate And the potassium oxalate of final concentration of 7.5g/L.

Sodium nitrate is conductive good, it can be achieved that decontamination speed is fast, detersive efficiency is high, and sodium oxalate, which has, keeps electric current uniform It is distributed the effect of decontamination workpiece surface, the roughness of decontamination workpiece surface can be reduced.

Above-mentioned cleansing composition is by the reasonable proportion between three kinds of nitric acid, nitrate and oxalates components and respectively The synergistic effect of component can make the smooth no spot corrosion of workpiece to be decontaminated;Generate waste liquid not sulfur-bearing, phosphorus and the halogen of cleansing composition Element etc. endangers the anion component of nuclear facilities liquid waste treatment system metal surface, can be directly by nuclear facilities liquid waste treatment system Processing.

The decontamination method of one embodiment includes the following steps: with the cleansing composition of any of the above-described to work to be decontaminated Part carries out ultrasound and electrolysis processing.Specifically, in the step of carrying out ultrasound and electrolysis processing to workpiece to be decontaminated, current density For 200A/m2~300A/m2, ultrasonic frequency is 40Hz~80Hz, and treatment temperature is 25 DEG C~40 DEG C.

It further, further include cleaning and drying described to be decontaminated after above-mentioned ultrasound and electrolysis processing processing step The step of workpiece surface.Further, using deionized water, to ultrasound and electrolysis, treated that part to be decontaminated cleans.It is dry Dry mode is drying or air-dries.Further, the mode of cleaning is to impregnate or spray.Cleaning temperature is 23 DEG C~27 DEG C.

It should be noted that workpiece to be decontaminated is that metal can be conductive, by the pollutant of electrodissolution metal surface, It disengages it from metal surface and is dissolved in electrolyte, so that metal surface polishes, to achieve the purpose that decontamination.At it In middle one embodiment, part to be decontaminated is Z5CND13.04 martensitic stain less steel or Cr13 stainless steel.Further, to be decontaminated Part is Z5CND13.04 martensitic stain less steel.It, can be with it is understood that part to be decontaminated is not limited to the above-mentioned component pointed out For other parts to be decontaminated.

Existing decontamination process is mainly chemically treated part to be decontaminated by using detergent, and decontamination factor is small, produces Raw waste liquid is more, meanwhile, in order to improve clean effect, the detergent of strong corrosive is often used, heavy corrosion is to be decontaminated Part is unfavorable for the repeated recycling utilize of part to be decontaminated.

Above-mentioned cleansing composition passes through the reasonable proportion between four kinds of nitric acid, glycerine, nitrate and oxalates components And the synergistic effect of each component can efficiently remove the radiation of surface of workpiece in conjunction with ultrasound and electrolysis treatment process Contact scar object.And generate waste liquid not sulfur-bearing, phosphorus and halogen etc. endanger nuclear facilities liquid waste treatment system metal surface yin from Subconstiuent can be handled directly by nuclear facilities liquid waste treatment system.

The following are specific embodiment parts.

It unless otherwise instructed, does not then include the other components in addition to inevitable impurity in following embodiment.Implement It in example if not otherwise indicated using drug and instrument, is this field conventional selection.The reality of actual conditions is not specified in embodiment Proved recipe method, according to normal conditions, such as the method that condition described in the prior art or manufacturer are recommended is realized.

Unless otherwise instructed, in following embodiment, HNO3It is added in the form of nitric acid, glycerine is added in the form of glycerol Enter.Workpiece to be decontaminated is plate, and the length of plate is 50mm, and width is 10mm width, with a thickness of 3mm.Water is deionization Water.

Embodiment 1

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 2

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 3

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 4

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 5

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 6

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Embodiment 7

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Comparative example 1

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Comparative example 2

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Comparative example 3

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Comparative example 4

The decontamination process of the workpiece to be decontaminated of the present embodiment is as follows:

(1) raw material for preparing cleansing composition is mixed according to table 1, obtains cleansing composition.

(2) according to the technological parameter of table 2, workpiece to be decontaminated is soaked in X1In the cleansing composition of mL, by work to be decontaminated Part connects power anode, and opens power supply, carries out ultrasound simultaneously to workpiece to be decontaminated and electrolysis is handled, current density X2A/ m2, ultrasonic frequency X3Hz, temperature T1DEG C, the processing time is t1 min。

(3) ultrasound and electrolysis treated workpiece are taken out, and is rinsed at normal temperature using deionized water, then dry punching Workpiece after washing obtains workpiece after decontamination.

Comparative example 5

The decontamination process of the workpiece to be decontaminated of the present embodiment is roughly the same with embodiment 5, the difference is that, this reality The cleansing composition for applying example is the detergent of commercially available IMC-03 lot number.

The workpiece to be decontaminated of 1 Examples 1 to 7 of table and comparative example 1~4 and the raw material for preparing cleansing composition

The technological parameter of the decontamination process of the workpiece to be decontaminated of 2 Examples 1 to 7 of table and comparative example 1~5

Clean effect test: the clean effect of the workpiece to be decontaminated of each embodiment and comparative example is measured and to work to be decontaminated The influence of part.Wherein, it is measured in decontamination process using mass difference method to the corrosion rate of workpiece to be decontaminated;It is examined using power spectrum Survey method measures the detersive efficiency (i.e. soil removal efficiency) of workpiece to be decontaminated;Workpiece decontamination to be decontaminated is measured using laser confocal The roughness situation of change of workpiece after the decontamination obtained after preceding and decontamination, wherein roughness variation refer to before decontamination roughness with The difference of roughness after decontamination;It is dirty that radioactivity Co on workpiece to be decontaminated is measured using radioactive isotope simulating pollution object space method Contaminate the removal effect of object;See Table 3 for details for measurement result.

The clean effect of the workpiece to be decontaminated of each embodiment of table 3 and comparative example and influence to workpiece to be decontaminated

From table 3 it can be seen that using Examples 1 to 7 cleansing composition and decontamination method detersive efficiency be 90%~ 95%, i.e. Examples 1 to 7 can remove on workpiece to be decontaminated 90%~95% pollutant, hence it is evident that it is commercially available to be higher than comparative example 5 Remove foul electrolyte (83%);And the cleansing composition of Examples 1 to 7 can remove 89%~95% on workpiece to be decontaminated Co pollutant, hence it is evident that it is commercially available higher than comparative example 5 to remove foul electrolyte (80%), illustrate above embodiment decontamination combination The clean effect of object is preferable, can preferably remove the radioactive pollutant on workpiece to be decontaminated.Meanwhile Examples 1 to 7 The corrosion rate of workpiece to be decontaminated is 0.065 μm/min~0.125 μm/min, lower than corrosion rate (0.133 μ of comparative example 5 M/min), illustrate that the decontamination process of above embodiment can reduce the corrosiveness to workpiece to be decontaminated, reduce to Metal Substrate The influence at bottom.Wherein, the detersive efficiency highest of embodiment 6, and corrosion rate is low, and influences most on workpiece surface to be decontaminated It is small.

Above-mentioned cleansing composition passes through the reasonable proportion between four kinds of nitric acid, glycerine, nitrate and oxalates components And the synergistic effect of each component, the radioactive pollutant of surface of workpiece can be efficiently removed.

The waste liquid of generation not sulfur-bearing, phosphorus and halogen etc. endanger the anion of nuclear facilities liquid waste treatment system metal surface at Point, it can directly be handled by nuclear facilities liquid waste treatment system.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.

Claims (10)

1. a kind of cleansing composition, which is characterized in that the cleansing composition includes that final volume percentage is 2%~5% Nitric acid, the glycerine that final volume percentage is 10%~30%, the nitrate of final concentration of 80g/L~140g/L and final concentration of The oxalates of 5g/L~25g/L.
2. cleansing composition according to claim 1, which is characterized in that the nitrate is in sodium nitrate and potassium nitrate At least one.
3. cleansing composition according to claim 1, which is characterized in that the oxalates is in sodium oxalate and potassium oxalate At least one.
4. described in any item cleansing compositions according to claim 1~3, which is characterized in that the cleansing composition includes eventually Glycerine that nitric acid that percentage by volume is 2.5%~4%, final volume percentage are 15%~25%, final concentration of 90g/L~ The sodium oxalate of the sodium nitrate of 130g/L and final concentration of 10g/L~20g/L.
5. cleansing composition according to claim 4, which is characterized in that the cleansing composition includes final volume percentage For 3% nitric acid, the glycerine that final volume percentage is 20%, the sodium nitrate of final concentration of 55g/L, final concentration of 55g/L The potassium oxalate of potassium nitrate, the sodium oxalate of final concentration of 7.5g/L and final concentration of 7.5g/L.
6. decontamination method according to claim 1, which is characterized in that it further includes molten for preparing the raw material of the cleansing composition Agent, the solvent are selected from least one of deionized water and pure water.
7. a kind of decontamination method, which comprises the steps of:
Ultrasound and electrolysis processing processing are carried out to workpiece to be decontaminated with claim 1~6 described in any item cleansing compositions.
8. decontamination method according to claim 7, which is characterized in that carry out ultrasound and electrolysis to workpiece to be decontaminated described In the step of processing, current density 200A/m2~300A/m2, ultrasonic frequency is 40Hz~80Hz, and treatment temperature is 25 DEG C ~40 DEG C.
9. decontamination method according to claim 7, which is characterized in that carry out ultrasound and electrolysis to workpiece to be decontaminated described After the step of processing, further include the steps that cleaning and drying the workpiece surface to be decontaminated.
10. decontamination method according to claim 7, which is characterized in that the workpiece to be decontaminated is Z5CND13.04 geneva Body stainless steel or Cr13 stainless steel.
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