CN102560495A - Coating stripping technology method for tin-nickel alloy coating - Google Patents
Coating stripping technology method for tin-nickel alloy coating Download PDFInfo
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- CN102560495A CN102560495A CN2011104235712A CN201110423571A CN102560495A CN 102560495 A CN102560495 A CN 102560495A CN 2011104235712 A CN2011104235712 A CN 2011104235712A CN 201110423571 A CN201110423571 A CN 201110423571A CN 102560495 A CN102560495 A CN 102560495A
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Abstract
The invention provides a coating stripping technology method for a tin-nickel alloy coating, which is simple, is easy to control, achieves a higher coating stripping speed, cannot corrode a basal body, and can markedly increase the repairing qualified rate of the coating of a metal part plated with tin-nickel alloy. The coating stripping technology method can be achieved through the technical scheme as follows: a coating stripping part is put in anti-dye salt solution containing cyanogen in an air extracting chamber and is heated until the temperature reaches 85 to 95 DEG C, the time ranges from 10 to 45 minutes, and the tin-nickel alloy coating is stripped through chemical reaction. In the coating stripping technology method for an unqualified coating caused in galvanization of tin-nickel alloy, the coating stripping part is put in heated anti-dye salt solution containing cyanogen, and the tin-nickel alloy coating is stripped through chemical reaction. The coating stripping technology method solves the problems in the conventional tin-nickel alloy coating stripping technology that the coating stripping speed is low and a basal body is corroded seriously.
Description
Technical field
The present invention relates to the withdrawal plating method of the defective coating of a kind of eleetrotinplate nickelalloy, more particularly, the present invention relates to application, greatly improve part and reprocess qualification rate, cut down finished cost through this method.
Background technology
In the prior art, can be on steel-iron components the cathodic coating that forms of Direct Electroplating tin-nickel alloy, form by 65% tin and 35% nickel usually.When electroplating,, generally all want the above copper facing bottom of preplating one deck 10 μ m because the coating space is more; Therefore the solidity to corrosion of tin-nickel alloy coating is good than the albata layer of condition of equivalent thickness; Can under different weather condition, keep gloss for a long time, and have solderability, coating surface " whisker " can not occur in prolonged preservation and use; Coating also has good solidity to corrosion, (HV 650～700 for suitable hardness; Between nickel coatings and chromium coating) and wear resistance, the premium properties that is had just because of the tin-nickel alloy layer is at present by fields such as application more and more widely and instrument, electronics, electrical equipment, opticinstrument, chemical utensils.But in eleetrotinplate nickelalloy process, the defective coating strip of generation difficulty, the strip cost is high, and the height of reprocessing qualification rate becomes the important factor that can eleetrotinplate nickelalloy technology widespread use.
The eleetrotinplate nickel alloy layer strip principle of prior art employing at present; Be in strongly acidic solution (vitriol oil or SPA); Metallic tin in the coating, nickel are by the strong oxidizer oxidation; Become metals ion and be dissolved in the solution, but meanwhile metallic iron too can be oxidized in the steel substrate, becomes iron ion and be dissolved in the solution.Its prescription and processing parameter to defective decoating liquid that adopts is generally: sulfuric acid H2SO4100%, technological temperature are (80～90) ℃, accomplish strip through the reactions formula.
Sn＋H2SO4→Sn＋2＋SO4-2＋H2↑
Ni＋H2SO4→Ni＋2＋SO4-2＋H2↑
Fe＋H2SO4→Fe＋2＋SO4-2＋H2↑
Because the decoating liquid that adopts is the strong acid with strong corrosion property, and chemical reaction can not take place because of its good solidity to corrosion in tin-nickel alloy coating at normal temperatures usually; Need high temperature and under forced-ventilated wind condition, just can carry out strip; And easy iron part base solid corrosion, withdrawal plating is complicated, and strip speed is slow; Efficient is low, and cost is high.
Summary of the invention
Task of the present invention is the weak point that exists to above-mentioned prior art, and it is simple to propose a kind of process method, is easy to control, and the stripping rapid speed is to the free from corrosion tin-nickel alloy coating of matrix withdrawal plating method.
In order to achieve the above object; The withdrawal plating method of a kind of tin-nickel alloy coating provided by the invention; It is characterized in that comprising the steps: in the exhausting kitchen strip part is placed on and contain in the cyanogen reserve salt solution; Be heated to 85 ℃～95 ℃, the time is 105min～45min, through chemical reaction the tin-nickel alloy layer is stripped.
The present invention has following beneficial effect than prior art.
The present invention does not produce corrosive nature through nickel there being the good solubility ability to iron; Staple is that m-nitrobenzene sodium sulfonate or staple are the chemical processes of nickel or ambrose alloy composite deposite on the phenyl sulfonic acid ammonium reserve salt stripping iron-based body, and the tin-nickel alloy layer that makes the iron-base part electroplating surface is by uniform dissolution.Resist printing is prone in the aqueous solution, decompose ionization property: anionic gradually because the reserve salt salt that is adopted solubleness in 25 degree water is generally/100 milliliters of 25 grams; Acid-basicity: pH value 7-9 (1% solution); Stability: acidproof, alkaline-resisting, anti-hard water; Solvability: water-soluble fabulous, so solution has better chemical stability.Method is simple, is easy to the control adjustment, and tin-nickel alloy coating strip efficient is high, stripping rapid speed, long service life.Not only improved the defective coating of iron part eleetrotinplate nickelalloy significantly and reprocessed qualification rate, and part iron-based body has not been produced corrosion.Solved traditional technology tin-nickel alloy coating strip difficulty, the perishable problem of iron matrix during strip.Satisfied the arts demand of steel-iron components eleetrotinplate nickel alloy layer.
Embodiment
In following examples, will further illustrate the present invention, these embodiment only are used to the present invention is described and the present invention are not limited.
In following examples, at normal temperatures and pressures, iron part eleetrotinplate nickel alloy layer strip must carry out in possessing the exhausting kitchen of strong exhausting.
The cyanogen reserve salt solution that contains of preparation can be sodium cyanide and reserve salt mixing solutions.Described reserve salt can be phenyl sulfonic acid ammonium solution or m-nitrobenzene sodium sulfonate solution.Contain the said of preparation that sodium cyanide content is 8wt%～10wt% in the cyanogen reserve salt solution, reserve salt content is 8wt%～10wt%, and all the other are water.Generally speaking, the defective coating of iron part eleetrotinplate nickelalloy chemistry decoating liquid-contain cyanogen reserve salt solution can be 80g/L～100g/L by sodium cyanide content, and m-nitrobenzene sulfonic acid content is 80g/L～100g/L content preparation.The defective coating chemistry of steel-iron components eleetrotinplate nickelalloy decoating liquid working temperature is 85 ℃～95 ℃, and the time is 10min～45min.
During strip tin-nickel alloy coating, in the exhausting kitchen, the strip part is positioned over and contains in the cyanogen reserve salt solution, be heated to 85 ℃～95 ℃, the time is 10min～45min, through chemical reaction the tin-nickel alloy layer is stripped.
Embodiment 1
The defective coating chemistry of system iron part eleetrotinplate nickelalloy decoating liquid is to be 80g/L by sodium cyanide content, and m-nitrobenzene sulfonic acid or m-nitrobenzene sodium sulfonate content are the preparation of 80g/L content.The defective coating chemistry of steel-iron components eleetrotinplate nickelalloy decoating liquid working temperature is 95 ℃, and the time is 30min.
Behind the defective coating chemistry of the steel-iron components eleetrotinplate nickelalloy strip, piece surface is original glossy Steel Grey, no evidence of corrosion.
Embodiment 2
The defective coating of steel-iron components eleetrotinplate nickelalloy chemistry decoating liquid is by being 100g/L for sodium cyanide content, and m-nitrobenzene sulfonic acid or m-nitrobenzene sodium sulfonate content 100g/L content are prepared.The defective coating chemistry of iron part eleetrotinplate nickelalloy decoating liquid working temperature is 85 ℃, and the time is 25min.
Behind the defective coating chemistry of the steel-iron components eleetrotinplate nickelalloy strip, piece surface is original glossy Steel Grey, no evidence of corrosion.
Embodiment 3
The defective coating of steel-iron components eleetrotinplate nickelalloy chemistry decoating liquid is by being 90g/L for sodium cyanide content, and m-nitrobenzene sulfonic acid or m-nitrobenzene sodium sulfonate content 90g/L content are prepared.The defective coating chemistry of iron part eleetrotinplate nickelalloy decoating liquid working temperature is 90 ℃, and the time is 45min.
Behind the defective coating chemistry of the steel-iron components eleetrotinplate nickelalloy strip, piece surface is original glossy Steel Grey, no evidence of corrosion.
Claims (5)
1. the withdrawal plating method of a tin-nickel alloy coating; It is characterized in that comprising the steps: in the exhausting kitchen strip part is placed on and contain in the cyanogen reserve salt solution; Be heated to 85～95 ℃, the time is 10 min～45min, through chemical reaction the tin-nickel alloy layer is stripped.
2. according to the withdrawal plating method of the said tin-nickel alloy coating of claim 1, it is characterized in that the said cyanogen reserve salt solution that contains is sodium cyanide and reserve salt mixing solutions.
3. according to the withdrawal plating method of the said tin-nickel alloy coating of claim 2, it is characterized in that described reserve salt is phenyl sulfonic acid ammonium solution or m-nitrobenzene sodium sulfonate.
4. according to the withdrawal plating method of the said tin-nickel alloy coating of claim 1, it is characterized in that contain the said of preparation that sodium cyanide content is 8wt%～10wt% in the cyanogen reserve salt solution, reserve salt content is 8wt%～10wt%, all the other are water.
5. according to the withdrawal plating method of the said tin-nickel alloy coating of claim 1, it is characterized in that in said the containing in the cyanogen reserve salt solution of preparation, sodium cyanide content is 80g/L～100g/L, m-nitrobenzene sulfonic acid content is 80g/L～100g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011104235712A CN102560495A (en) | 2011-12-16 | 2011-12-16 | Coating stripping technology method for tin-nickel alloy coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104235712A CN102560495A (en) | 2011-12-16 | 2011-12-16 | Coating stripping technology method for tin-nickel alloy coating |
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| CN102560495A true CN102560495A (en) | 2012-07-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177575A (en) * | 2015-10-01 | 2015-12-23 | 常州市奥普泰科光电有限公司 | Deplating method for deplating brass surface tin-nickel coating |
| CN109778191A (en) * | 2019-03-12 | 2019-05-21 | 珠海市玛斯特锌镍加工有限公司 | A kind of withdrawal plating of easy turning steel part surface Zinc-Nickel coating layer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101054715A (en) * | 2007-02-26 | 2007-10-17 | 内蒙古第一机械制造（集团）有限公司 | Electrochemical copper removing solution |
| CN101284438A (en) * | 2007-12-12 | 2008-10-15 | 山东同大镍网有限公司 | High mesh size print cylinder mould production method |
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2011
- 2011-12-16 CN CN2011104235712A patent/CN102560495A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101054715A (en) * | 2007-02-26 | 2007-10-17 | 内蒙古第一机械制造（集团）有限公司 | Electrochemical copper removing solution |
| CN101284438A (en) * | 2007-12-12 | 2008-10-15 | 山东同大镍网有限公司 | High mesh size print cylinder mould production method |
Non-Patent Citations (1)
| Title |
|---|
| 吴永清: "从铁基体上退除金属镀层的方法", 《电镀与涂饰》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177575A (en) * | 2015-10-01 | 2015-12-23 | 常州市奥普泰科光电有限公司 | Deplating method for deplating brass surface tin-nickel coating |
| CN109778191A (en) * | 2019-03-12 | 2019-05-21 | 珠海市玛斯特锌镍加工有限公司 | A kind of withdrawal plating of easy turning steel part surface Zinc-Nickel coating layer |
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Application publication date: 20120711 |