CN101693994B - Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof - Google Patents
Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof Download PDFInfo
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- CN101693994B CN101693994B CN2009102329277A CN200910232927A CN101693994B CN 101693994 B CN101693994 B CN 101693994B CN 2009102329277 A CN2009102329277 A CN 2009102329277A CN 200910232927 A CN200910232927 A CN 200910232927A CN 101693994 B CN101693994 B CN 101693994B
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Abstract
The invention relates to tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and a using method thereof, which belong to the technical field of metal surface processing. The tarnish resistant rare-earth salt processing solution comprises components by weight percentage: rear-earth salts: 10-15%, ortho-hydroxybenzoic acid: 5-10%, citrate: 1-5%, organic amine: 1-5%, and water: 75-80%. The using method includes immersing pure copper samples with fresh surfaces into the tarnish resistant rare-earth salt processing solution for 30-120 seconds, and immediately drying the pure copper samples for 10-30 minutes after being taken out. The tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and the using method thereof utilize rare-earth salt solution, well utilize chemical characteristics of chemical agent, reduce cost and increase efficiency, and a formed chemical conversion film can enable copper color difference to range from 0.01 to 0.05 within 60 days.
Description
Technical field
The invention belongs to field of metal surface treatment technology, refer in particular to a kind of anti-variable color rare-earth salt processing solution in fine copper surface that is used for.
Background technology
Fine copper exposes easy oxidation stain in natural condition, influences the outward appearance and the performance of product.In order to guarantee the appearance property of product, to carry out the anti-variable color of Passivation Treatment to the fine copper surface usually.The principle of Passivation Treatment is that reagent and copper surface react, and forms one deck compound, attached to its surface, reaches and improves the purpose that prevention contacts with oxygen.Patent 200480009235 and 00814440 has been narrated a kind of prescription of copper surface passivation treatment soln respectively, but both prescriptions to be to form the organism coating, and this has influenced the subsequent disposal on copper surface and the performance of performance.
Summary of the invention
The present invention is directed to above deficiency, a kind of rare-earth salt processing solution that is used for the anti-variable color in fine copper surface is provided.The present invention utilizes the chemical property of chemical reagent, has reduced cost, has improved efficient, and the chemical conversion film of formation can make the primary colors of copper keep more than 60 days, and this solution is fit to nearly all copper aftertreatment technology.
The present invention is achieved by the following technical solutions:
The weight percent of the anti-variable color rare-earth salt processing solution component in fine copper of the present invention surface and each component is: rare-earth salts: 10-15%, Whitfield's ointment 5-10%, Citrate trianion: 1-5%, organic amine: 1-5%, water: 75-80%;
Described rare-earth salts is cerous nitrate or lanthanum nitrate, and described Whitfield's ointment is Whitfield's ointment or sulphosalicylic acid, and described Citrate trianion is Trisodium Citrate or ammonium citrate; Described organic amine is aniline or O-Phenylene Diamine, and described water is distilled water or deionized water.
The pure copper samples of unsalted surface is immersed 30-120 second in the anti-variable color rare-earth salt processing solution in fine copper surface, dried immediately after the taking-up 10-30 minute, its surperficial coppery aberration changed between 0.01-0.05 in 60 days.
The present invention adopts rare earths salt, have substantive distinguishing features and marked improvement,, well utilize the chemical property of chemical reagent and reduced cost by the solution of development research, improved efficient, the chemical conversion film of formation can make the coppery aberration change between 0.01-0.05.
Embodiment
Provide following examples in conjunction with technical solution of the present invention:
Embodiment 1
At first in a 10L groove, get 2/3 distilled water, dissolve 1500g cerous nitrate and 800g sulphosalicylic acid successively, after the whole dissolvings of reagent in the groove, 100mL Trisodium Citrate and 100mL O-Phenylene Diamine are poured in the tank liquor under stirring fast,, added water to 10L at last until mixing fully, obtain treatment soln, the pure copper samples of unsalted surface was immersed wherein 40 seconds, dried immediately after the taking-up 15 minutes, its surperficial coppery aberration changed between 0.02-0.03 in 60 days.
Embodiment 2
At first in a 10L groove, get 2/3 deionized water, dissolved 1200g lanthanum nitrate and 1000g Whitfield's ointment successively, after the whole dissolvings of reagent in the groove, 200mL ammonium citrate and 100mL aniline are poured in the tank liquor under stirring fast,, added water to 10L at last until mixing fully, obtain treatment soln, the pure copper samples of unsalted surface was immersed wherein 100 seconds, dried immediately after the taking-up 20 minutes, its surperficial coppery aberration changed between 0.01-0.03 in 60 days.
Embodiment 3
At first in a 10L groove, get 2/3 distilled water, dissolve 1000g lanthanum nitrate and 600g Whitfield's ointment successively, after the whole dissolvings of reagent in the groove, 300mL Trisodium Citrate and 500mL O-Phenylene Diamine are poured in the tank liquor under stirring fast,, added water to 10L at last until mixing fully, obtain treatment soln, the pure copper samples of unsalted surface was immersed wherein 90 seconds, dried immediately after the taking-up 15 minutes, its surperficial coppery aberration changed between 0.02-0.04 in 60 days.
Claims (2)
1. one kind is used for the rare-earth salt processing solution that variable color is prevented on the fine copper surface, and components based on weight percentage is calculated: rare-earth salts: 10-15%, Whitfield's ointment 5-10%, Citrate trianion: 1-5%, organic amine: 1-5%, water: 75-80%; Described rare-earth salts is cerous nitrate or lanthanum nitrate, and described Whitfield's ointment is a sulphosalicylic acid, and described Citrate trianion is Trisodium Citrate or ammonium citrate; Described organic amine is aniline or O-Phenylene Diamine, and described water is distilled water or deionized water.
2. the method for using the described rare-earth salt processing solution of claim 1 that the fine copper surface is handled is as follows: the pure copper samples of unsalted surface is immersed 30-120 second in the anti-variable color rare-earth salt processing solution in fine copper surface, dried immediately after the taking-up 10-30 minute, the coppery aberration on surface changed between 0.01-0.05 in 60 days.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102329277A CN101693994B (en) | 2009-10-09 | 2009-10-09 | Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102329277A CN101693994B (en) | 2009-10-09 | 2009-10-09 | Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101693994A CN101693994A (en) | 2010-04-14 |
| CN101693994B true CN101693994B (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102329277A Expired - Fee Related CN101693994B (en) | 2009-10-09 | 2009-10-09 | Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof |
Country Status (1)
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| CN (1) | CN101693994B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324538A (en) * | 1997-04-25 | 1998-10-28 | Japan Energy Corp | Anti-tarnishing of copper or copper alloy |
| CN101182641A (en) * | 2007-08-02 | 2008-05-21 | 江西理工大学 | Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof |
-
2009
- 2009-10-09 CN CN2009102329277A patent/CN101693994B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2324538A (en) * | 1997-04-25 | 1998-10-28 | Japan Energy Corp | Anti-tarnishing of copper or copper alloy |
| CN101182641A (en) * | 2007-08-02 | 2008-05-21 | 江西理工大学 | Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-310883A 1999.11.09 |
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| CN101693994A (en) | 2010-04-14 |
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Granted publication date: 20110629 Termination date: 20131009 |