CN101182641A - Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof - Google Patents
Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof Download PDFInfo
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- CN101182641A CN101182641A CNA2007101385868A CN200710138586A CN101182641A CN 101182641 A CN101182641 A CN 101182641A CN A2007101385868 A CNA2007101385868 A CN A2007101385868A CN 200710138586 A CN200710138586 A CN 200710138586A CN 101182641 A CN101182641 A CN 101182641A
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- copper
- solution
- rare earth
- corrosion
- corrosion inhibitor
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Abstract
The invention discloses a rare earth copper corrosion-inhibition agent and a surface treatment technique thereof. The corrosion-inhibition agent comprises the mixed rare earth oxide, sulfosalicylic acid, benzotriazole, citric acid and water. The mixed rare earth oxide in the prescription is the mixture of the following chemicals: La2O3, Y2O3, Eu2O3 and Ce2O3. All main components of the copper corrosion-inhibition agent are green water treatment chemicals, so the corrosion-inhibition agent is harmless to the environment, provided with the high corrosion inhibition efficiency and thus a corrosion inhibition agent consistent with the sustainable development requirement. Raw materials of the corrosion inhibition agent can be obtained easily with the low cost. The surface treatment technique operation is simple, and the solution components are stable. Moreover, the maintenance and adjustment is convenient.
Description
Technical field:
The invention belongs to the metal material surface processing technology field, the present invention relates to the composite copper inhibitor that forms of rare-earth salts and organic inhibitor in particular.
Background technology:
Copper and alloy thereof still influence its use owing to its surface phenomenons such as oxidation, variable color occur easily in long-term exposure in air because its good performance and color and luster attractive in appearance are widely used for fields such as electronic material, wrapping material, imitation gold copper-base alloy, ornaments modelled after an antique, archaizeding handicraft, copper word, copper label, copper coin and large-scale sculpture.At present, the method to copper and alloy surface inhibition processing thereof mainly contains two classes:
The first kind: the chromic salt inhibition is handled.It is that the copper and copper alloy piece surface dissolves in inhibiting solution that the mechanism that forms protective membrane is handled in its inhibition; part and the pH of solution interface place value raise; generate subsalt and oxide compound; cover piece surface and form fine and close protective membrane; continuous rising along with the pH value; the protective membrane formation speed is accelerated, the rete thickening.Owing in treating processes, can discharge a large amount of acid waste water and concentration thereof the Cr of country's permission discharge value head and shoulders above
6+Solution, the wastewater treatment burden is big, and environmental pollution is serious, is unfavorable for Sustainable development.
Second class: adopt benzotriazole (BTA) and derivative thereof that copper and alloy surface inhibition thereof are handled.The surface of the copper and copper alloy of handling through benzotriazole generates the film of one deck tens dusts to the hundreds of dust, because this rete is very thin, be easy to scratch, and be easy to slow oxidation in air again, cause appearance luster to deepen gradually, aesthetic appearance is affected, and color and luster is good not as through chromate treating also.
Summary of the invention:
The present invention is exactly the deficiency at above-mentioned situation, and provide a kind of at copper and alloy surface inhibition processing and the higher rare-earth copper alloy inhibiter of inhibition efficiency, this inhibiter has tangible corrosion inhibition to copper and alloy thereof.
1. the prescription of rare earth copper inhibitor of the present invention is to contain in every liter of solution:
Mishmetal salt 0.2-1.0g sulphosalicylic acid 6-10g
Benzotriazole 1-8g citric acid 10-20g
Mishmetal salt in the above-mentioned prescription is the mixture of following pharmaceutical chemicals: La
2O
3, Y
2O
3, Eu
2O
3, Ce
2O
3, wherein in the mishmetal salt each rare earth element percentage composition than being La%: Y%: Eu%: Ce%=1: 1: 1: 1 or 1: 1: 1: 2 or 1: 1: 2: 1 or 1: 1: 3: 1.
2. corrosion inhibitor solution compound method:
Prepare rare earths salt in advance, mixed rare-earth oxide is obtained rare earths salt after the concentrated nitric acid dissolving, dissolve sulphosalicylic acid, benzotriazole and citric acid respectively with a small amount of distilled water, deionized water or tap water again and make base soln, then rare earths salt is mixed with base soln and is diluted to and require concentration, after at room temperature leaving standstill more than 6 hours, refilter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
3. inhibition process of surface treatment:
It is characterized in that: processed copper and alloy part thereof are put into the described corrosion inhibitor solution processing of claim 1 taking-up after 5-10 minute immediately after thoroughly oil removing is cleaned, naturally dry after washed with de-ionized water and get final product, this moment, the corrosion inhibitor solution temperature was 50～60 ℃.
The invention has the advantages that: several main components of described copper inhibitor are green water treatment agent, and environment is not had harm, are a kind of inhibiter that meets the Sustainable development needs.Described inhibiter raw material is easy to get, and particularly rare-earth salts belongs to China's high yield resource, and reserves occupy first place in the world, and the inhibition cost is lower.Experiment confirm is when existing the present invention to get copper inhibitor in the solution, inhibiter and copper generate a kind of protective membrane, embody corrosion mitigating effect, process stabilizing, and solution composition is simple and safeguard easy to adjust.
Embodiment:
Below in conjunction with embodiment, the invention will be further described, so that the enforcement of this patent.
Embodiment 1
1. at first prepare the mishmetal salts solution, take by weighing La respectively
2O
3, Y
2O
3, Eu
2O
3, Ce
2O
3Each 1 gram with its mixing, adds 30 milliliters of concentrated nitric acids it is dissolved, and adds distilled water diluting to 1 liter again.
2. make base soln then, under the normal temperature state, take by weighing sulphosalicylic acid 6 gram, benzotriazole 2 grams, citric acid 10 grams are used a small amount of dissolved in distilled water respectively with above-mentioned medicine earlier, then mixed diluting to 950 milliliter.
3. getting 50 milliliters from the 1 liter of mishmetal salts solution for preparing mixes with 950 milliliters of base solns that prepare, at room temperature leave standstill more than 6 hours, and then filter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
Embodiment 2
1. at first prepare the mishmetal salts solution, take by weighing La respectively
2O
3, Y
2O
3, Eu
2O
3Each 2 gram, Ce
2O
34 grams with its mixing, add 30 milliliters of concentrated nitric acids it are dissolved, and add distilled water diluting to 1 liter again.
2. make base soln then, under the normal temperature state, take by weighing sulphosalicylic acid 8 gram, benzotriazole 5 grams, citric acid 15 grams are used a small amount of dissolved in distilled water respectively with above-mentioned medicine earlier, then mixed diluting to 950 milliliter.
3. getting 50 milliliters from the 1 liter of mishmetal salts solution for preparing mixes with 950 milliliters of base solns that prepare, at room temperature leave standstill more than 6 hours, and then filter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
Embodiment 3
1. at first prepare the mishmetal salts solution, take by weighing La respectively
2O
3, Y
2O
3, Ce
2O
3Each 2 gram, Eu
2O
34 grams add its mixing 30 milliliters of concentrated nitric acids it are dissolved, and add distilled water diluting to 1 liter again.
2. make base soln then, under the normal temperature state, take by weighing sulphosalicylic acid 8 gram, benzotriazole 6 grams, citric acid 16 grams are used a small amount of dissolved in distilled water respectively with above-mentioned medicine earlier, then mixed diluting to 950 milliliter.
3. getting 50 milliliters from the 1 liter of mishmetal salts solution for preparing mixes with 950 milliliters of base solns that prepare, at room temperature leave standstill more than 6 hours, and then filter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
Embodiment 4
1. at first prepare the mishmetal salts solution, take by weighing La respectively
2O
3, Y
2O
3, Ce
2O
3Each 1 gram, Eu
2O
33 grams with its mixing, add 30 milliliters of concentrated nitric acids it are dissolved, and add distilled water diluting to 1 liter again.
2. make base soln then, under the normal temperature state, take by weighing sulphosalicylic acid 10 gram, benzotriazole 8 grams, citric acid 18 grams are used a small amount of dissolved in distilled water respectively with above-mentioned medicine earlier, then mixed diluting to 950 milliliter.
3. getting 50 milliliters from the 1 liter of mishmetal salts solution for preparing mixes with 950 milliliters of base solns that prepare, at room temperature leave standstill more than 6 hours, and then filter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
Embodiment 5 (inhibiter of being prepared with example 1 is an example)
The corrosion inhibitor solution of preparation in the example 1 is heated to 55 degrees centigrade on electric furnace, then wanting processed copper and alloy part thereof after thoroughly oil removing cleans up, to put into corrosion inhibitor solution processing taking-up after 6 minutes immediately, through washed with de-ionized water, dry naturally and get final product.Copper after the inhibition surface treatment and alloy part surface brightness height thereof can keep former glossy in atmosphere, weakly acidic condition for a long time.
Claims (2)
1. rare earth copper inhibitor, it is characterized in that: containing mishmetal salt in every liter of this solution is the 0.2-1.0 gram, and sulphosalicylic acid is the 6-10 gram, and benzotriazole (BTA) is the 1-8 gram, citric acid is the 10-20 gram, and the mishmetal salt in the above-mentioned prescription is the mixture of following pharmaceutical chemicals: La
2O
3, Y
2O
3, Eu
2O
3, Ce
2O
3, wherein in the mishmetal salt each rare earth element percentage composition than being La%: Y%: Eu%: Ce%=1: 1: 1: 1 or 1: 1: 1: 2 or 1: 1: 2: 1 or 1: 1: 3: 1.The rare earths salt for preparing mixed and be diluted to requiring concentration with base soln, at room temperature leave standstill more than 6 hours, and then filter, just finished the process for preparation of whole corrosion inhibitor solution, the pH value of the solution for preparing is 4-7.
According to the described rare earth copper inhibitor of claim 1 to copper and alloy part thereof surface inhibition treatment process, it is characterized in that: processed copper and alloy part thereof are put into the described corrosion inhibitor solution processing of claim 1 taking-up after 5-10 minute immediately after thoroughly oil removing is cleaned, naturally dry after washed with de-ionized water and get final product, this moment, the corrosion inhibitor solution temperature was 50-60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101385868A CN101182641A (en) | 2007-08-02 | 2007-08-02 | Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101385868A CN101182641A (en) | 2007-08-02 | 2007-08-02 | Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101182641A true CN101182641A (en) | 2008-05-21 |
Family
ID=39448062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101385868A Pending CN101182641A (en) | 2007-08-02 | 2007-08-02 | Rare-earth copper corrosion inhibitor and mat-forming treatment process thereof |
Country Status (1)
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|---|---|
| CN (1) | CN101182641A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693994B (en) * | 2009-10-09 | 2011-06-29 | 河海大学常州校区 | Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof |
| CN102206826A (en) * | 2011-04-28 | 2011-10-05 | 上海交通大学 | Preparation method of compound copper corrosion inhibitor and surface treatment method by using compound copper corrosion inhibitor |
| CN103993322A (en) * | 2014-06-03 | 2014-08-20 | 如皋市金陵化工有限公司 | Preparation method of copper corrosion inhibitor |
| CN104099598A (en) * | 2014-07-25 | 2014-10-15 | 钱宏彬 | Red copper chromium-free chemical conversion coating treating agent and preparation method thereof |
| CN105753075A (en) * | 2015-07-31 | 2016-07-13 | 南通德安化工有限公司 | Novel efficient and environment-friendly water treatment agent |
| CN105963897A (en) * | 2016-05-23 | 2016-09-28 | 南京理工大学连云港研究院 | Corrosion inhibition additive for multicomponent water-series fire extinguishing agent |
| KR101896011B1 (en) * | 2017-06-16 | 2018-09-06 | (주)넥스트에어로스 | Anti-corrision varnish composition and forming method for anti-corrision coating layer using the same |
-
2007
- 2007-08-02 CN CNA2007101385868A patent/CN101182641A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693994B (en) * | 2009-10-09 | 2011-06-29 | 河海大学常州校区 | Tarnish resistant rare-earth salt processing solution used on surfaces of pure coppers and using method thereof |
| CN102206826A (en) * | 2011-04-28 | 2011-10-05 | 上海交通大学 | Preparation method of compound copper corrosion inhibitor and surface treatment method by using compound copper corrosion inhibitor |
| CN102206826B (en) * | 2011-04-28 | 2013-02-27 | 上海交通大学 | Preparation method of compound copper corrosion inhibitor and surface treatment method by using compound copper corrosion inhibitor |
| CN103993322A (en) * | 2014-06-03 | 2014-08-20 | 如皋市金陵化工有限公司 | Preparation method of copper corrosion inhibitor |
| CN103993322B (en) * | 2014-06-03 | 2016-05-11 | 如皋市金陵化工有限公司 | A kind of preparation method of copper inhibitor |
| CN104099598A (en) * | 2014-07-25 | 2014-10-15 | 钱宏彬 | Red copper chromium-free chemical conversion coating treating agent and preparation method thereof |
| CN105753075A (en) * | 2015-07-31 | 2016-07-13 | 南通德安化工有限公司 | Novel efficient and environment-friendly water treatment agent |
| CN105963897A (en) * | 2016-05-23 | 2016-09-28 | 南京理工大学连云港研究院 | Corrosion inhibition additive for multicomponent water-series fire extinguishing agent |
| KR101896011B1 (en) * | 2017-06-16 | 2018-09-06 | (주)넥스트에어로스 | Anti-corrision varnish composition and forming method for anti-corrision coating layer using the same |
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Open date: 20080521 |