CN102925905A - Acid-washing corrosion inhibitor for copper and alloy device - Google Patents
Acid-washing corrosion inhibitor for copper and alloy device Download PDFInfo
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- CN102925905A CN102925905A CN2012105047490A CN201210504749A CN102925905A CN 102925905 A CN102925905 A CN 102925905A CN 2012105047490 A CN2012105047490 A CN 2012105047490A CN 201210504749 A CN201210504749 A CN 201210504749A CN 102925905 A CN102925905 A CN 102925905A
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- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
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Abstract
The invention relates to an acid-washing corrosion inhibitor for a copper and alloy device. The acid-washing corrosion inhibitor comprises the following components of 4-8 percent of benzotriazole (BTA), 2-10 percent of water-soluble sodium mercaptobenzothiazole, 1-5 percent of surface active agent and 5-10 percent of N,N-bis(phosphonomethyl) aspartic acid. The acid-washing corrosion inhibitor for the copper and alloy device has the characteristics of high washing speed, good effect, complete descaling and no damage to a device, is soluble in an acid-washing solution and is convenient to use.
Description
Technical field
The invention belongs to the matting field, relate to a kind of copper and alloy equipment restrainer.
Background technology
The metallic corrosion meeting causes great financial loss and safety hazard, in matting, usually adds inhibiter to reach the purpose that reduces metallic corrosion.Copper and alloy thereof are because good heat-transfer, be easy to machine-shaping, thereby in industry, be widely used in and make interchanger and reactor, when interchanger working time is longer, inwall is understood deposit carbon silicate dirt, silicate scale, ferric oxide is dirty, organism is dirty etc., heat transfer effect is significantly reduced, even can cause metallic corrosion.Usually need to select suitable clean-out system to carry out scale removal.The equipment washing of copper and alloy material thereof acquires a certain degree of difficulty with respect to carbon steel and stainless steel, and especially copper alloy in acidic medium " dezincify " phenomenon can occur, and namely the zinc in the copper alloy at first dissolves, and then promotes the quick dissolving of copper alloy.Normally used inhibiter is difficult to the cleaning performance that reaches desirable.Once had the number acid pickling inhibitor to be fit to wash copper, but add in the scavenging solution stablely not because containing the organism that is difficult to dissolve, cleaning performance is not good, cleans the copper alloy relative difficulty larger.
Summary of the invention
The present invention relates to a kind of copper and alloy equipment restrainer; by benzotriazole (BTA) 4-8%, water-soluble mercapto benzothiazole sodium 2-10%, tensio-active agent 1-5%, N; the water of the two (phosphonomethyl) aspartic acid 5-10% of N-and surplus forms; compound synergic; each component produces preferably synergistic effect;, so that the pickling corrosion inhibition of composition is apparently higher than independent use.Corrosion inhibition mainly rely on copper surface on active copper atom or cupric ion produce a kind of chemisorption; Or and then occur that thereby sequestering action forms that one deck is fine and close and protective membrane firmly makes equipment made of copper obtain good protection.
Each component is dissolved in the normal-temperature water, stirs, select addition to be 0.1-0.5% according to pickling medium and the metal material that needs protection when using.Copper of the present invention and alloy equipment can effectively slow down corrosion of metal in the acid cleaning process with restrainer, the effective dirt in the cleaning equipment, have that cleaning speed is fast, effective, equipment characteristic thoroughly, is not hindered in scale removal, equipment surface clean and bright after the cleaning, the corrosion failure of acid and alkali washing lotion.Be soluble in pickle solution, easy to use.
Adopt weight-loss method to estimate the corrosion inhibiting ability of inhibiter.
Embodiment
The below further explains the present invention in the mode of embodiment, but the present invention is not limited to these embodiment.
Embodiment: mainThe raw material technical indicator:
(1) benzotriazole: be called for short BTA.Chemical formula: C6H5N3, German foreign cherry group produces, and outward appearance is needle-like, Water/oil dual-purpose.
Technical indicator:
Purity 〉=99.5, fusing point 〉=97 ° C moisture content≤0.1% ash≤0.05% pH value 5.5-6.5
(2) water-soluble mercapto benzothiazole sodium (MBTNa)
The water-soluble mercapto benzothiazole sodium of table 1 (MBTNa) technical indicator
| Project | Index |
| Outward appearance | Yellow transparent liquid |
| Solids content % 〉= | 50.0 |
| Density (20 ℃) g/cm 3 | 1.20 |
| PH (1% aqueous solution) | 9.0-11.5 |
(3) NP-10 anion surfactant polyoxyethylene nonylphenol ether (10)
Sulphonate type gemini surfactant, select the tensio-active agent disodium 4-dodecyl-2,4 '-oxydibenzenesulfonate, because with double-hydrophilic, has remarkable dispersion force, can reduce aqueous solution surface energy at prescription of the present invention, increase diffusive force and velocity of diffusion, have excellent water-soluble, coupling and surfactivity, remarkable detergency ability, dispersive ability and resistance to hard water, still have excellent dispersive ability and solubilising under the low temperature, because its solubilising is strong, be very suitable for preparing super concentrated liquid, be convenient to dilution and use.
(4) SJ-F620 dispersing scale inhibitor (formal name used at school: the two phosphono aspartic acids of N N)
Index sees Table 2.
The physical index of table 2 SJ-F620 dispersing scale inhibitor
| Index name | Unit | Index value |
| Outward appearance | （P 20）g/cm 3 | Red liquid |
| Density | % | 1.15-1.20 |
| Solid content | / | ≥27.0 |
| The pH(1% aqueous solution) | / | 1.0-2.0 |
Each component is dissolved in the normal-temperature water, stirs, select addition to be 0.1-0.5% according to pickling medium and the metal material that needs protection when using.
Embodiment 1: inhibiter compositing formula A: by benzotriazole (BTA) 4%, water-soluble mercapto benzothiazole sodium 8%, tensio-active agent NP-10 5%, N, the water of the two (phosphonomethyl) aspartic acids 5% of N-and surplus.Wherein ratio all refers to weight percent.
Embodiment 2:Composite corrosion inhibitor prescription B: by benzotriazole (BTA) 8%, water-soluble mercapto benzothiazole sodium 4%, sulphonate type gemini surfactant 2%, N, the water of the two (phosphonomethyl) aspartic acids 4% of N-and surplus.Wherein ratio all refers to weight percent.
It is as follows that inhibiter of the present invention is applied to the pickling experiment embodiment:
Embodiment 3:Embodiment 1:10% nitric acid adds above-described embodiment gained composite corrosion inhibitor prescription A 0.3%, cleans as brass, and temperature 20-30 ℃, 5 hours time, corrosion rate: 0.088, corrosion inhibition rate: more than 99%.
Embodiment 4:Thionamic acid 4% adds above-described embodiment gained composite corrosion inhibitor prescription B 0., 25 %, and 35 ℃ of temperature are cleaned as red copper, 3.5 hours time, and corrosion rate: 0.005, corrosion inhibition rate: more than 99%.
Embodiment 5:Hydrochloric acid 7% adds above-described embodiment gained composite corrosion inhibitor prescription A0.3%, temperature 20-30 ℃
Clean as red copper, 3 hours time, corrosion rate: 0.051, corrosion inhibition rate: more than 99%.
Claims (2)
1. a copper and alloy equipment restrainer, by benzotriazole 4-8%, water-soluble mercapto benzothiazole sodium 2-10%, tensio-active agent 1-5%, and N, the two (phosphonomethyl) aspartic acid 5-10% of N-form.
2. a kind of copper according to claim 1 and alloy equipment restrainer, it is characterized in that, the tensio-active agent in the described restrainer composition is that sulphonate type gemini surfactant, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene are wherein a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210504749.0A CN102925905B (en) | 2012-12-03 | 2012-12-03 | Acid-washing corrosion inhibitor for copper and alloy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210504749.0A CN102925905B (en) | 2012-12-03 | 2012-12-03 | Acid-washing corrosion inhibitor for copper and alloy device |
Publications (2)
| Publication Number | Publication Date |
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| CN102925905A true CN102925905A (en) | 2013-02-13 |
| CN102925905B CN102925905B (en) | 2014-08-13 |
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| CN201210504749.0A Active CN102925905B (en) | 2012-12-03 | 2012-12-03 | Acid-washing corrosion inhibitor for copper and alloy device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469236A (en) * | 2013-09-22 | 2013-12-25 | 西北机器有限公司 | Copper base material cleaning agent and preparation method thereof |
| CN103602987A (en) * | 2013-07-29 | 2014-02-26 | 李敏辉 | Environment-friendly detinning liquor for waste circuit boards |
| CN107190254A (en) * | 2017-05-22 | 2017-09-22 | 博敏电子股份有限公司 | A kind of new brown treatment fluid of printed circuit board |
| CN113249731A (en) * | 2021-05-28 | 2021-08-13 | 西安热工研究院有限公司 | Chemical cleaning agent for copper scale in generator inner cooling water system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778996A (en) * | 2004-11-19 | 2006-05-31 | 中国科学院金属研究所 | Pickler of copper alloy materials |
| CN101302060A (en) * | 2008-05-30 | 2008-11-12 | 山西太钢不锈钢股份有限公司 | Corrosion and scale inhibitor for industrial recirculated cooling water |
| CN101368131A (en) * | 2007-08-16 | 2009-02-18 | 江苏海迅实业集团股份有限公司 | Mechanical equipment detergent |
| CN101864575A (en) * | 2010-06-27 | 2010-10-20 | 金宏 | Special cleaning agent for stainless steel equipment and use method thereof |
| US20120283163A1 (en) * | 2008-10-21 | 2012-11-08 | Advanced Technology Materials, Inc. | Copper cleaning and protection formulations |
-
2012
- 2012-12-03 CN CN201210504749.0A patent/CN102925905B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778996A (en) * | 2004-11-19 | 2006-05-31 | 中国科学院金属研究所 | Pickler of copper alloy materials |
| CN101368131A (en) * | 2007-08-16 | 2009-02-18 | 江苏海迅实业集团股份有限公司 | Mechanical equipment detergent |
| CN101302060A (en) * | 2008-05-30 | 2008-11-12 | 山西太钢不锈钢股份有限公司 | Corrosion and scale inhibitor for industrial recirculated cooling water |
| US20120283163A1 (en) * | 2008-10-21 | 2012-11-08 | Advanced Technology Materials, Inc. | Copper cleaning and protection formulations |
| CN101864575A (en) * | 2010-06-27 | 2010-10-20 | 金宏 | Special cleaning agent for stainless steel equipment and use method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602987A (en) * | 2013-07-29 | 2014-02-26 | 李敏辉 | Environment-friendly detinning liquor for waste circuit boards |
| CN103469236A (en) * | 2013-09-22 | 2013-12-25 | 西北机器有限公司 | Copper base material cleaning agent and preparation method thereof |
| CN107190254A (en) * | 2017-05-22 | 2017-09-22 | 博敏电子股份有限公司 | A kind of new brown treatment fluid of printed circuit board |
| CN107190254B (en) * | 2017-05-22 | 2019-04-23 | 博敏电子股份有限公司 | A kind of novel brownification treatment fluid of printed circuit board |
| CN113249731A (en) * | 2021-05-28 | 2021-08-13 | 西安热工研究院有限公司 | Chemical cleaning agent for copper scale in generator inner cooling water system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102925905B (en) | 2014-08-13 |
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