CN104060271A - Vapor-phase corrosion inhibitor and preparation method thereof - Google Patents
Vapor-phase corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN104060271A CN104060271A CN201410201058.2A CN201410201058A CN104060271A CN 104060271 A CN104060271 A CN 104060271A CN 201410201058 A CN201410201058 A CN 201410201058A CN 104060271 A CN104060271 A CN 104060271A
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Abstract
The invention discloses a vapor-phase corrosion inhibitor and a preparation method thereof. The vapor-phase corrosion inhibitor comprises the following components in percentage by mass: 8-15% of alkynyl amine, 8-15% of organic solvent and the balance of water. The preparation method comprises the following steps: uniformly mixing the alkynyl amine and water according to the formula proportion to obtain an alkynyl amine water solution; and adding the organic solvent into the alkynyl amine water solution according to the formula proportion, and uniformly mixing to obtain the vapor-phase corrosion inhibitor. The vapor-phase corrosion inhibitor has higher saturated vapor pressure, has obvious corrosion inhibition effect on carbon steel atmospheric corrosion, and has enduring protection action. Compared with the bicyclohexylamine nitrite, cyclohexylamine carbonate and other vapor-phase corrosion inhibitors, the vapor-phase corrosion inhibitor disclosed by the invention has smaller toxic and side effects and more obvious corrosion inhibition effect. The vapor-phase corrosion inhibitor disclosed by the invention has the advantages of accessible raw materials, simple preparation technique and small toxic and side effects, can effectively lower the corrosion rate of the carbon steel atmospheric corrosion, and can prolong the service life of various steel apparatuses and facilities.
Description
Technical field
The invention belongs to anticorrosive technical field, more specifically, relate to a kind of vapour-phase inhibitor and preparation method thereof.
Background technology
Iron and steel is because the starting material that its good mechanical property and cheap price are extensively used as various open installations are processed into various device and instrument.Variation due to free air temperature and humidity in the use procedure in the open of these instrument and equipments often easily suffers atomospheric corrosion, thereby affects its use and life-span, and causes huge financial loss.The loss being caused by atomospheric corrosion every year in China accounts for the over half of all form of corrosion.Atomospheric corrosion can be controlled in many ways, and as used organism, inorganics or metal plating, use alloy to replace or use vapour-phase inhibitor etc.
In recent years, vapour-phase inhibitor develops rapidly and applies more extensive as the more promising corrosion inhibitor of one.With conventional anti-corrosion method comparison, the major advantage of vapour-phase inhibitor is that it can be propagated and be arrived the full surface of metal by gas phase, comprises the imperceptible positions such as gap.And because inhibiter rete is very thin, it can not affect the use of instrument.
But vapour-phase inhibitor in the market exists corrosion mitigating effect not remarkable, the large deficiency that waits of toxic side effect; Because the inhibition mechanism research of vapour-phase inhibitor relatively lags behind, hindered again the further development and application of vapour-phase inhibitor simultaneously.Therefore the atomospheric corrosion that the vapour-phase inhibitor that, exploitation makes new advances is controlled metal has very large Research Significance and market using value.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides a kind of vapour-phase inhibitor and preparation method thereof, its object is to select the composition of vapour-phase inhibitor and adjusts its proportioning, solves thus current vapour-phase inhibitor effect not significantly and the large technical problem of toxic side effect.
For achieving the above object, according to one aspect of the present invention, provide a kind of vapour-phase inhibitor, comprised 8% to 15% ynamine and 8% to 15% organic solvent according to mass percent, surplus is water; Preferably, described vapour-phase inhibitor comprises 10% ynamine and 10% organic solvent according to mass percent, and surplus is water.
Preferably, described vapour-phase inhibitor, described in it, ynamine is propargylamine.
Preferably, described vapour-phase inhibitor, described in it, organic solvent is polar non-proton organic solvent.
Preferably, described vapour-phase inhibitor, described in it, polar non-proton organic solvent is dimethyl sulfoxide (DMSO).
According to another aspect of the present invention, the preparation method of the vapour-phase inhibitor described in providing, comprises the following steps: first the ynamine of formula rate and water are mixed, obtain the aqueous solution of ynamine; Then, in the aqueous solution of ynamine, add the organic solvent of formula rate to mix, obtain described vapour-phase inhibitor.
Preferably, the preparation method of described vapour-phase inhibitor, described in it, ynamine is propargylamine.
Preferably, the preparation method of described vapour-phase inhibitor, described in it, organic solvent is polar non-proton organic solvent.
Preferably, the preparation method of described vapour-phase inhibitor, described in it, polar non-proton organic solvent is dimethyl sulfoxide (DMSO).。
According to another aspect of the present invention, provide the application of described vapour-phase inhibitor in protection carbon steel atomospheric corrosion.
In general, the above technical scheme of conceiving by the present invention compared with prior art, can obtain following beneficial effect:
(1) vapour-phase inhibitor provided by the invention has higher saturated vapor pressure, and volatility is better, can act on rapidly metallic surface protection is provided, and atomospheric corrosion corrosion mitigating effect is remarkable;
(2) this vapour-phase inhibitor has lasting provide protection to carbon steel, and utilization ratio is high;
(3) this vapour-phase inhibitor can act on rapidly metallic surface, and inhibition protection is provided;
(4) this vapour-phase inhibitor toxic side effect is little;
(5) vapour-phase inhibitor preparation technology provided by the invention is simple, and raw material is easy to get.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each embodiment of described the present invention, involved technical characterictic just can combine mutually as long as do not form each other conflict.
Vapour-phase inhibitor provided by the invention, comprises 8% to 15% ynamine and 8% to 15% organic solvent according to mass percent, and surplus is prepared by water.Described ynamine is preferably propargylamine; Described organic solvent is preferably polar non-proton organic solvent, more preferably dimethyl sulfoxide (DMSO).
Vapour-phase inhibitor provided by the invention, its preparation method comprises the following steps: first the ynamine of formula rate and water are evenly mixed, obtain the aqueous solution of ynamine; Then, in the aqueous solution of ynamine, add the organic solvent of formula rate to mix, obtain described vapour-phase inhibitor.Described ynamine is preferably propargylamine; Described organic solvent is preferably polar non-proton organic solvent, more preferably dimethyl sulfoxide (DMSO).
In vapour-phase inhibitor provided by the invention, ynamine is because its stronger volatile performance is obtained higher saturation vapour pressure, but uses separately its volatility of ynamine to cause excessively by force inhibiter unstable.The present invention, by adding organic solvent to make inhibiter more stable, by selecting the kind of ynamine and organic solvent and regulating its ratio, maintains in suitable scope its volatility, reaches lasting good vapor phase corrosion inhibitor effect.
Be below embodiment:
Embodiment 1
A kind of vapour-phase inhibitor, comprises 8% propargylamine and 15% dimethyl sulfoxide (DMSO) organic solvent according to mass percent, and surplus is water.
Described vapour-phase inhibitor, it is prepared as follows, and first according to mass fraction, the propargylamine of 8 parts and 77 parts of water is evenly mixed, and obtains the aqueous solution of propargylamine; Then, to the dimethyl sulfoxide (DMSO) organic solvent that adds formula rate in the aqueous solution of propargylamine, mix, obtain limpid faint yellow vapour-phase inhibitor.Described water is redistilled water.
Embodiment 2
A kind of vapour-phase inhibitor, comprises 10% propargylamine and 10% dimethyl sulfoxide (DMSO) organic solvent according to mass percent, and surplus is water.
Described vapour-phase inhibitor, it is prepared as follows, and first according to mass fraction, 10 parts of propargylamines and 80 parts of water is evenly mixed, and obtains the aqueous solution of propargylamine; Then, in the aqueous solution of propargylamine, add the dimethyl sulfoxide (DMSO) organic solvent of formula rate to mix, obtain limpid faint yellow vapour-phase inhibitor.Described water is redistilled water.
Embodiment 3
A kind of vapour-phase inhibitor, comprises 15% propargylamine and 8% dimethyl sulfoxide (DMSO) organic solvent according to mass percent, and surplus is water.
Described vapour-phase inhibitor, it is prepared as follows, and first according to mass fraction, 15 parts of methylpent ynamines and 77 parts of water is evenly mixed, and obtains the aqueous solution of methylpent ynamine; Then, in the aqueous solution of methylpent ynamine, add the dimethyl sulfoxide (DMSO) organic solvent of formula rate to mix, obtain limpid faint yellow vapour-phase inhibitor.Described water is redistilled water.
Embodiment 4
The carbon steel that does not add this vapour-phase inhibitor is measured by atomospheric corrosion situation
In beaker with cover, putting into a certain amount of aqueous glycerin solution makes whole enclosed space keep humidity at relative humidity 98%RH; Beaker is placed in thermostat water bath, regulates temperature to reach 55 DEG C; X52 carbon steel (10 × 10 × 3mm), after 150,400,600,800,1200 object silicon carbide papers polishings, is polished to light with the aluminium sesquioxide of 0.3 μ m, dries up stand-by finally by hair dryer cold wind after ethanol oil removing.After treated samples weighing, retaining a face (10 × 3mm) is exposed in atmosphere, all the other five face 704 silica gel sealings, finally be placed in beaker and be with in reeded vessel, make sample avoid contacting with aqueous glycerin solution, be exposed in the atmosphere of 98%RH and 55 DEG C simultaneously.After three days, remove 704 glue and corrosion product, weigh, and to calculate carbon steel average corrosion rate be 0.4167g/ (m
2h).
Embodiment 5
The carbon steel that adds vapour-phase inhibitor in embodiment 1 to 3 is measured by atomospheric corrosion situation
According to the method as in embodiment 4, use respectively vapour-phase inhibitor uniformly dispersing described in embodiment 1 to 3 in the little watch-glass around vessel, all the other conditions are consistent with embodiment 4.The situation of measuring afterwards carbon steel in three days and suffer atomospheric corrosion, result is as shown in table 1.
As shown in Table 1, vapour-phase inhibitor described in embodiment 1 to 3 all has corrosion mitigating effect significantly, wherein propargylamine and dimethyl sulfoxide (DMSO) massfraction are 10%, the massfraction of water for 80% join the corrosion mitigating effect of vapour-phase inhibitor the most outstanding, inhibition efficiency is up to 93.32%.Therefore vapour-phase inhibitor provided by the invention, can be applicable to protect carbon steel atomospheric corrosion.
Table 1
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a vapour-phase inhibitor, is characterized in that, comprises 8% to 15% ynamine and 8% to 15% organic solvent according to mass percent, and surplus is water; Preferably, described vapour-phase inhibitor comprises 10% ynamine and 10% organic solvent according to mass percent, and surplus is water.
2. vapour-phase inhibitor as claimed in claim 1, is characterized in that, described ynamine is propargylamine.
3. vapour-phase inhibitor as claimed in claim 1, is characterized in that, described organic solvent is polar non-proton organic solvent.
4. vapour-phase inhibitor as claimed in claim 3, is characterized in that, described polar non-proton organic solvent is dimethyl sulfoxide (DMSO).
5. the preparation method of the vapour-phase inhibitor as described in claim 1 to 4 any one, is characterized in that, comprises the following steps: first the ynamine of formula rate and water are mixed, obtain the aqueous solution of ynamine; Then, in the aqueous solution of ynamine, add the organic solvent of formula rate to mix, obtain described vapour-phase inhibitor.
6. preparation method as claimed in claim 5, is characterized in that, described ynamine is propargylamine.
7. preparation method as claimed in claim 5, is characterized in that, described organic solvent is polar non-proton organic solvent.
8. preparation method as claimed in claim 7, is characterized in that, described polar non-proton organic solvent is dimethyl sulfoxide (DMSO).
9. the application of the vapour-phase inhibitor as described in claim 1 to 4 any one in protection carbon steel atomospheric corrosion.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274533A (en) * | 2015-12-01 | 2016-01-27 | 中国石油大学(华东) | Vapor phase inhibitor |
| CN109554010A (en) * | 2018-11-29 | 2019-04-02 | 河北宇达防锈科技有限公司 | The controllable gas-phase antirusting film and preparation method thereof of antirust time |
| CN114907830A (en) * | 2021-02-07 | 2022-08-16 | 中国石油天然气股份有限公司 | Chloride stress corrosion cracking inhibitor for 13Cr stainless steel, preparation and application thereof |
| CN117658904A (en) * | 2023-12-05 | 2024-03-08 | 延长油田股份有限公司杏子川采油厂 | Acidizing corrosion inhibitor, acidizing working solution, and preparation method and application thereof |
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| US3242094A (en) * | 1962-05-07 | 1966-03-22 | Dow Chemical Co | Propargylabietylamines as corrosion inhibitors in acid solutions |
| US3496232A (en) * | 1967-06-29 | 1970-02-17 | Air Reduction | Preparation of propargyl amines |
| US20080274013A1 (en) * | 2007-05-04 | 2008-11-06 | Bj Services Company | Method and composition for controlling corrosion in high density brines |
| CN102330099A (en) * | 2011-09-09 | 2012-01-25 | 北京星航机电设备厂 | Stainless steel pickling inhibitor |
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2014
- 2014-05-13 CN CN201410201058.2A patent/CN104060271B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3242094A (en) * | 1962-05-07 | 1966-03-22 | Dow Chemical Co | Propargylabietylamines as corrosion inhibitors in acid solutions |
| US3496232A (en) * | 1967-06-29 | 1970-02-17 | Air Reduction | Preparation of propargyl amines |
| US20080274013A1 (en) * | 2007-05-04 | 2008-11-06 | Bj Services Company | Method and composition for controlling corrosion in high density brines |
| CN102330099A (en) * | 2011-09-09 | 2012-01-25 | 北京星航机电设备厂 | Stainless steel pickling inhibitor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105274533A (en) * | 2015-12-01 | 2016-01-27 | 中国石油大学(华东) | Vapor phase inhibitor |
| CN109554010A (en) * | 2018-11-29 | 2019-04-02 | 河北宇达防锈科技有限公司 | The controllable gas-phase antirusting film and preparation method thereof of antirust time |
| CN109554010B (en) * | 2018-11-29 | 2020-11-27 | 河北宇达防锈科技有限公司 | Gas-phase antirust film with controllable antirust time and preparation method thereof |
| CN114907830A (en) * | 2021-02-07 | 2022-08-16 | 中国石油天然气股份有限公司 | Chloride stress corrosion cracking inhibitor for 13Cr stainless steel, preparation and application thereof |
| CN117658904A (en) * | 2023-12-05 | 2024-03-08 | 延长油田股份有限公司杏子川采油厂 | Acidizing corrosion inhibitor, acidizing working solution, and preparation method and application thereof |
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