CN106011860A - Technology for environment-friendly chemical deplating agent - Google Patents
Technology for environment-friendly chemical deplating agent Download PDFInfo
- Publication number
- CN106011860A CN106011860A CN201610579602.6A CN201610579602A CN106011860A CN 106011860 A CN106011860 A CN 106011860A CN 201610579602 A CN201610579602 A CN 201610579602A CN 106011860 A CN106011860 A CN 106011860A
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- CN
- China
- Prior art keywords
- hydrogen peroxide
- content
- sulphuric acid
- deplating
- strip
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/16—Acidic compositions
- C23F1/28—Acidic compositions for etching iron group metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- ing And Chemical Polishing (AREA)
Abstract
The invention provides a technology for an environment-friendly chemical deplating agent. A water solution of sulfuric acid, hydrogen peroxide and a corrosion inhibitor is included. The corrosion inhibitor is organic matter including nitrogen or sulfur or the like or a high-polarity organic compound including -COOR, -COOH, -CHO, triple bond (C is equivalent to C) or polybasic hydroxyl-OH and the like. In addition, a potential difference necessarily exists between a cathode and an anode, the potential difference can be eliminated or reduced under the effect of electron-deficient groups and electron-rich groups of the organic matter, and therefore corrosion can be reduced or temporarily stopped. By means of the technology, deplating liquid is high in deplating speed, a nickel-plated layer with the thickness of 0.2 mm can be removed within two minutes at a proper temperature, and waste deplating liquid generated after deplating of the deplating liquid is over facilitates recovery of metal nickel.
Description
Technical field
The present invention relates to a kind of chemistry decoating liquid, particularly to the technique of a kind of environment protection chemical strip agent.
Background technology
Nickel plating workpiece is widely used in the productive life of people.After the nickel plating of metal surface, there is many
Advantage and superperformance, in traditional decoating liquid, mainly with high concentration nitric acid for main become
Point, it is easy to during strip matrix is caused heavy corrosion.Further, since it is dense to have strong oxidizing property
The existence of nitric acid, when strip, nitric acid meeting and metal reaction, release a large amount of one
Nitrogen oxide (NO), nitrogen dioxide (NO2) yellow smog, these smog meeting severe contamination is big
Gas, causes serious injury to the person.
1, containing potassium dichromate in oxidant, chromium element is heavy metal element, after entering human body, no
Easily discharging can be harmful at people's cylinder accumulation, and operator's life-time service is to causing a huge sum of money
Belong to the harm such as poisoning；
2, corrosion inhibiter only has protective effect to rubber surface, but poor to steel surface protection, needs
Cyanide to be added coordinates the effect that just can play protection steel substrate rapid de-plating with reserve salt,
But cyanide has severe toxicity, should not use；
3, containing the metal such as chromium, manganese in decoating liquid, these metals can enter in decoating liquid, uses alkali
Property decoating liquid is not easy to the recovery of nickel element；
4. the addition of stabilizer, slow down strip speed, extends the strip time；So this patent carries
The decoating liquid gone out is not suitable for the strip of steel substrate surface nickel.
5, the addition of corrosion inhibiter makes it cannot simultaneously strip nickel dam.
Accordingly, it would be desirable to new green environment protection chemistry decoating liquid substitutes tradition there is the decoating liquid polluted.
Summary of the invention
The present invention efficiently solves the strip agent that in prior art, chemistry strip method uses and exists
Produce environmental pollution and the volatility irritant gas of human body harmfulness, simultaneously to decoating liquid
To matrix corrosion serious problems, it is proposed that a method solved.The invention provides a kind of use
In steel surface, the decoating liquid of rubber surface nickel coating, there is not harmful material,
The most not discharge of noxious gases, green, environmental protection, strip speed is fast, and is easy to move back coated metal and returns
The decoating liquid received
The technique of a kind of environment protection chemical strip agent of the present invention, including sulphuric acid, hydrogen peroxide and inhibition
The aqueous solution of agent, corrosion inhibiter is the Organic substance containing nitrogen or sulfur etc., or containing-COOR,
The highly polar organic compound such as-COOH ,-CHO, three key (C ≡ C) or multi-hydroxy-OH.
Wherein corrosion inhibiter be preferably hexamethylenamine and thiourea therein one or more.
Further preferred: the weight/mass percentage composition of acid is 98% sulphuric acid 40g/L to 400g/L, double
Oxygen water quality percentage composition is 30g/L to 150g/L, and the weight/mass percentage composition of hydrogen peroxide used is
30%, the content of corrosion inhibiter hexamethylenamine is 5g/L to 50g/L, thiourea content be 5g/L extremely
50g/L, strip temperature is 10 DEG C to 80 DEG C.
The weight/mass percentage composition of acid is 98% sulphuric acid 60g/L to 300g/L, the quality hundred of hydrogen peroxide
Dividing content is 30% hydrogen peroxide 50g/L to 120g/L, and the content of corrosion inhibiter is 10g/L to 40g/L,
Thiourea content is 10g/L to 40g/L, and strip temperature is 15 DEG C to 75 DEG C.
The weight/mass percentage composition of acid is 98% sulphuric acid 80g/L to 250g/L, the quality hundred of hydrogen peroxide
Dividing content is 30%, hydrogen peroxide 60g/L to 100g/L, and the content of corrosion inhibiter is 15g/L to 45g/L,
Thiourea content is 15g/L to 45g/L, and strip temperature is 20 DEG C to 70 DEG C.
The weight/mass percentage composition of acid is 98% sulphuric acid 120g/L to 200g/L, the quality of hydrogen peroxide
Percentage composition is 30% hydrogen peroxide 70g/L to 90g/L, and the content of corrosion inhibiter is 20g/L to 40g/L,
Thiourea content is 20g/L to 40g/L, and strip temperature is 25 DEG C to 65 DEG C.
Above-mentioned chemical decoating liquid, for the method for steel surface copper and mickel of decorporating, moves back including by waiting
Plating workpiece impregnated in decoating liquid, and strip temperature is 10 DEG C to 80 DEG C.
Treat that strip workpiece is that steel surface, rubber surface are by nickel coating.
Strip principle:
Occur to react as follows during strip:
Initial reaction stage:
The highest in the concentration of initial reaction stage, sulphuric acid and hydrogen peroxide, occur this period is anti-main
React and be: nickel solvent H2O2+Cu+2H2SO4=CuSO4+2H2O in decoating liquid,
The decomposition 2H2O2=2H2O+O2 of H2O2+Ni+2H2SO4=NiSO4+2H2O and hydrogen peroxide ↑
Reaction middle and late stage:
Along with reaction carry out sulfuric acid concentration and hydrogen peroxide is gradually lowered, can with reaction:
The generation of Cu+CuSO4=Cu2SO4, Ni+NiSO4=Ni2SO4, univalent copper ion (Cu+),
Monovalence nickel ion (Ni+) there will be.
The reaction later stage:
Along with the carrying out of reaction, in decoating liquid, a lot of then copper surface of the concentration of sulphuric acid there will be black
Copper oxide: Cu+H2O2=CuO+H2O, Ni+H2O2=NiO+H2O
Move back in transient main occur for initial reaction, middle and late stage reaction and late phase reaction are few
Amount, so CuSO4 and/or NiSO4, CuSO4 and/or the NiSO4 that primarily form are by electricity
The method solved reclaims highly purified metal simple-substance.
Corrosion inhibiter action principle:
Containing the Organic substance such as nitrogen, sulfur, or containing-COOR ,-COOH ,-CHO, three key (C
≡ C) or the highly polar organic compound such as multi-hydroxy-OH, all possibly as corrosion inhibiter.This
A little polar groups have the strongest adhesive force to metal, and the organic of one layer of polarity has been adsorbed in metal surface
Thing, sheet resistance is greatly improved, and makes corrosion current be difficult to flow, thus prevents corrosion.
Additionally, certainly exist electric potential difference between negative electrode and anode, organic electron-deficient group and
The effect of electron rich group, can eliminate or reduce electric potential difference, thus can reduce corrosion or temporary
Time stop corrosion.
Moving back of the present invention crosses liquid strip speed soon, at a suitable temperature, and can be again in two minutes
The nickel coating that stripping 0.2mm is thick, and the strip waste liquid that its strip terminates is easy to returning of metallic nickel
Receive.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be described, it will be appreciated that reality described herein
Executing example be merely to illustrate and explain the present invention, be not intended to limit the present invention, following example are equal
For aqueous solution.
Embodiment 1:
Test material is the copper plate of 10mm × 10mm × 2mm, puts it into sulphuric acid percent mass
Content is 98% sulphuric acid 400g/L, and hydrogen peroxide weight/mass percentage composition is 30% hydrogen peroxide 150g/L,
Thiourea content is the decoating liquid of 50g/L, and reaction temperature is 80 DEG C.Nickel plate is quick in decoating liquid
Reaction, is completely dissolved, and response speed is 55 μm/min (thickness direction of plate).
Embodiment 2:
Test material is the nickel plate of 10mm × 10mm × 2mm, puts it into sulphuric acid percent mass and contains
Amount is 98% sulphuric acid 300g/L, and hydrogen peroxide weight/mass percentage composition is 30% hydrogen peroxide 120g/L, sulfur
Urea content is the decoating liquid of 30g/L, and reaction temperature is 75 DEG C.Nickel plate is the most anti-in decoating liquid
Should, it being completely dissolved, response speed is 57 μm/min (thickness direction of plate).
Embodiment 3:
Test material is the nickel plating stainless steel piece of 20mm × 12mm × 0.32mm, and matrix is not
Rust steel is 304L, and nickel plating thickness is that to put it into sulphuric acid weight/mass percentage composition be 98% to 0.02mm
Sulphuric acid 250g/L, hydrogen peroxide weight/mass percentage composition is 30% hydrogen peroxide 100g/L, and hexamethylenamine contains
Amount is the decoating liquid of 50g/L, and strip temperature is 20 DEG C.Nickel coating reacts in decoating liquid, its
Middle nickel coating is by strip, and strip is complete, and plain steel occurs without seriously corroded phenomenon.Strip speed
Degree is 23 μm/min (thickness direction of coating).
Execute example the present invention has been described in detail, for a person skilled in the art,
Technical scheme described in foregoing embodiments still can be modified by it, or to wherein
Portion of techniques feature carries out equivalent.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (6)
1. the technique of an environment protection chemical strip agent, it is characterised in that include sulphuric acid, hydrogen peroxide and
The aqueous solution of corrosion inhibiter, corrosion inhibiter is the Organic substance containing nitrogen or sulfur, or containing-COOR,
-COOH ,-CHO, three key (C ≡ C) or the highly polar organic compound of multi-hydroxy-OH.
The technology process of a kind of environment protection chemical strip agent the most as claimed in claim 1, its feature exists
In, corrosion inhibiter be preferably hexamethylenamine and thiourea therein one or more.
The technique of a kind of environment protection chemical strip agent the most as claimed in claim 2, it is characterised in that
The weight/mass percentage composition of sulphuric acid is 98% sulphuric acid 40g/L to 400g/L, and hydrogen peroxide percent mass contains
Amount is 30% hydrogen peroxide 30g/L to 150g/L, and the content of hexamethylenamine is 5g/L to 50g/L,
Thiourea content is 5g/L to 50g/L, and strip temperature is 10 DEG C to 80 DEG C.
The technique of a kind of environment protection chemical strip agent the most as claimed in claim 2, it is characterised in that
The weight/mass percentage composition of sulphuric acid is 98% sulphuric acid 60g/L to 300g/L, the percent mass of hydrogen peroxide
Content is 30% hydrogen peroxide 50g/L to 120g/L, and the content of corrosion inhibiter is 10g/L to 40g/L,
Thiourea content is 10g/L to 40g/L, and strip temperature is 15 DEG C to 75 DEG C.
The technique of a kind of environment protection chemical strip agent the most as claimed in claim 2, it is characterised in that
The weight/mass percentage composition of sulphuric acid is 98% sulphuric acid 80g/L to 250g/L, the percent mass of hydrogen peroxide
Content is 30% hydrogen peroxide 60g/L to 100g/L, and the content of corrosion inhibiter is 15g/L to 45g/L,
Thiourea content is 15g/L to 45g/L, and strip temperature is 20 DEG C to 70 DEG C.
The technique of a kind of environment protection chemical strip agent the most as claimed in claim 2, it is characterised in that
The weight/mass percentage composition of sulphuric acid is 98% sulphuric acid 120g/L to 200g/L, the quality hundred of hydrogen peroxide
Dividing content is 30% hydrogen peroxide 70g/L to 90g/L, and the content of corrosion inhibiter is 20g/L to 40g/L,
Thiourea content is 20g/L to 40g/L, and strip temperature is 25 DEG C to 65 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610579602.6A CN106011860A (en) | 2016-07-21 | 2016-07-21 | Technology for environment-friendly chemical deplating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610579602.6A CN106011860A (en) | 2016-07-21 | 2016-07-21 | Technology for environment-friendly chemical deplating agent |
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| Publication Number | Publication Date |
|---|---|
| CN106011860A true CN106011860A (en) | 2016-10-12 |
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ID=57116129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610579602.6A Pending CN106011860A (en) | 2016-07-21 | 2016-07-21 | Technology for environment-friendly chemical deplating agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419271A (en) * | 2017-08-10 | 2017-12-01 | 佛山市南博旺环保科技有限公司 | A kind of agent of environment protection chemical strip and strip method for nickel coating |
| CN107794530A (en) * | 2017-11-08 | 2018-03-13 | 繁昌县晶鑫贸易有限公司 | A kind of production method applied to copper facing, the environment protection chemical strip agent of nickel plating |
| CN110629224A (en) * | 2019-10-15 | 2019-12-31 | 昆山市板明电子科技有限公司 | Environment-friendly nickel removing agent and preparation method and use method thereof |
| CN111945164A (en) * | 2020-07-09 | 2020-11-17 | 福建闽航电子有限公司 | Rapid environment-friendly deplating solution |
Citations (4)
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| CN1896314A (en) * | 2005-07-11 | 2007-01-17 | 佛山市顺德区汉达精密电子科技有限公司 | Stabilized decoating liquid |
| CN103572306A (en) * | 2012-07-30 | 2014-02-12 | 比亚迪股份有限公司 | Deplating solution for removing nickel on cooper surface, preparation method thereof, and method for removing nickel on cooper surface |
| CN103924245A (en) * | 2014-04-10 | 2014-07-16 | 北京工业大学 | Chemical stripping solution and stripping method |
| CN105239072A (en) * | 2015-11-11 | 2016-01-13 | 广州市太和电路板有限公司 | Electroplating hanger deplating solution and deplating method thereof |
-
2016
- 2016-07-21 CN CN201610579602.6A patent/CN106011860A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896314A (en) * | 2005-07-11 | 2007-01-17 | 佛山市顺德区汉达精密电子科技有限公司 | Stabilized decoating liquid |
| CN103572306A (en) * | 2012-07-30 | 2014-02-12 | 比亚迪股份有限公司 | Deplating solution for removing nickel on cooper surface, preparation method thereof, and method for removing nickel on cooper surface |
| CN103924245A (en) * | 2014-04-10 | 2014-07-16 | 北京工业大学 | Chemical stripping solution and stripping method |
| CN105239072A (en) * | 2015-11-11 | 2016-01-13 | 广州市太和电路板有限公司 | Electroplating hanger deplating solution and deplating method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107419271A (en) * | 2017-08-10 | 2017-12-01 | 佛山市南博旺环保科技有限公司 | A kind of agent of environment protection chemical strip and strip method for nickel coating |
| CN107419271B (en) * | 2017-08-10 | 2019-05-31 | 佛山市南博旺环保科技有限公司 | A kind of agent of environment protection chemical strip and strip method for nickel coating |
| CN107794530A (en) * | 2017-11-08 | 2018-03-13 | 繁昌县晶鑫贸易有限公司 | A kind of production method applied to copper facing, the environment protection chemical strip agent of nickel plating |
| CN110629224A (en) * | 2019-10-15 | 2019-12-31 | 昆山市板明电子科技有限公司 | Environment-friendly nickel removing agent and preparation method and use method thereof |
| CN110629224B (en) * | 2019-10-15 | 2022-03-18 | 昆山市板明电子科技有限公司 | Environment-friendly nickel removing agent and preparation method and use method thereof |
| CN111945164A (en) * | 2020-07-09 | 2020-11-17 | 福建闽航电子有限公司 | Rapid environment-friendly deplating solution |
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Application publication date: 20161012 |