CN109811346A - A kind of gas phase corrosion inhibitor and preparation method thereof and the application in terms of building iron corrosion protection - Google Patents
A kind of gas phase corrosion inhibitor and preparation method thereof and the application in terms of building iron corrosion protection Download PDFInfo
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- CN109811346A CN109811346A CN201910025513.0A CN201910025513A CN109811346A CN 109811346 A CN109811346 A CN 109811346A CN 201910025513 A CN201910025513 A CN 201910025513A CN 109811346 A CN109811346 A CN 109811346A
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Abstract
Application the invention discloses a kind of gas phase corrosion inhibitor and preparation method thereof and in terms of building iron corrosion protection, the corrosion inhibitor includes resistance rust ingredient and solvent, its weight ratio is (50-60): (40-50), the solvent includes organic solvent and inorganic solvent, and resistance rust ingredient includes the raw material of following weight ratio: 45-50 parts of aliphatic amino acid, 20-25 parts of triethanolamine, 3-5 parts of benzotriazole, 25-30 parts of sodium benzoate.Gas phase corrosion inhibitor provided by the invention has many advantages, such as resistance rust excellent effect, easy to operate, low toxic and environment-friendly, is of great immediate significance to the service life for improving reinforced concrete structure, sale easy to spread and industrial industrialization have a extensive future.
Description
Technical field
The invention belongs to steel to hinder rust Material Field, and in particular to a kind of gas phase corrosion inhibitor and preparation method and its building
The application of reinforcement corrosion protection aspect.
Background technique
As the ocean engineerings such as bridge spanning the sea, port and pier and seabed tunnel are more and more, armored concrete is largely answered
In the construction in area of bordering on the sea, and steel bar corrosion will lead to the destruction of reinforced concrete structure, has seriously affected marine worker and has built
The service life built, safety accident caused by reinforced concrete structure fails and economic loss are far super to be expected, internationally recognized corruption
Erosion loss caused by only one China is the 3~5% of GDP (GDP), is made safely to people's life and national economy
At very big damage.Currently, the use of reinforcing steel bar corrosion inhibitor being a kind of most simple and most economical effective for delaying to prevent steel bar corrosion
Method, developing the effective corrosion inhibitor of green energy conservation has great society and economic value.
Reinforcing steel bar corrosion inhibitor currently on the market can be divided into inorganic, organic and complex class according to chemical component.With nitrite
Although the inorganic corrosion inhibitor resistance rust effect for Typical Representative is good, environmental issue caused by its toxicity causes many China bright
Order is forbidden to use such corrosion inhibitor；The hetero atom and bar list that organic type corrosion inhibitor passes through the lone electron pairs easy to form such as S, N, O
Face forms chelate, to protect reinforcing bar from the erosion of chloride ion；Compound corrosion inhibitor is by by organic and inorganic resistance
Rust agent compounding and obtain, but its effect is not fully up to expectations, it is difficult to really apply, therefore environmentally protective organic type corrosion inhibitor at
For current main research hotspot.
The usage mode of reinforcing steel bar corrosion inhibitor is mainly include the following types: 1) will resistance by way of mixing and stirring with concrete at present
Rust agent is added in armored concrete system；2) corrosion inhibitor brushing is arrived into bar list in concrete surface by way of diffusion
Face；3) it is migrated by way of electromigration, additional forceful electric power source to inside concrete.Such operated in accordance with conventional methods is complicated, low efficiency
Under, it needs to develop a kind of corrosion inhibitor easy to operate.Gas phase corrosion inhibitor is that corrosion inhibitor solution refers to will be slow under room temperature environment and waves
Gas is sent out into, rich in all kinds of resistances rust ingredient in the gas, is easy protective layer to be formed, to play in rebar surface absorption film-forming
The effect of anti-corrosion protection.Such corrosion inhibitor is environmental-friendly, nontoxic, while ensureing resistance rust effect, keeps operation extremely simple
It is single；Its usage amount in concrete can be greatly lowered simultaneously, reduce influence of the corrosion inhibitor to concrete performance, have great
Engineering significance.
Summary of the invention
Goal of the invention: in order to overcome the shortcomings of existing reinforcing steel bar corrosion inhibitor, one kind environmental protection easy to use, safe is provided, in room
Volatile and resistance rust excellent effect gas phase corrosion inhibitor under the conditions of temperature, and it is anti-to carry out corrosion to the armored concrete of marine environment
Shield application.
Technical solution: to achieve the above object of the invention, the present invention adopts the following technical scheme:
A kind of gas phase corrosion inhibitor, including resistance rust ingredient and solvent, weight ratio are (50-60): (40-50), the solvent
Including organic solvent and inorganic solvent, resistance rust ingredient includes the raw material of following weight ratio:
45-50 parts of aliphatic amino acid, 20-25 parts of triethanolamine, 3-5 parts of benzotriazole, 25-30 parts of sodium benzoate.
It is preferred that:
The solvent includes diethylene glycol and water, and weight ratio is (10-15): (85-90).
The aliphatic amino acid is any in Beta-alanine, amion acetic acid, glutamic acid, asparagine or glutamine
One or more mixing.
The preparation method of the gas phase corrosion inhibitor, comprising the following steps:
(1) benzotriazole is mixed in proportion with organic solvent, is stirred evenly；
(2) aliphatic amino acid, sodium benzoate are mixed in proportion with inorganic solvent, is stirred evenly；
(3) triethanolamine is weighed in proportion, it is mixed with mixture obtained by above-mentioned steps (1) and step (2), most
Gas phase corrosion inhibitor needed for obtaining eventually.
Application of the gas phase corrosion inhibitor in terms of building iron corrosion protection.
The gas phase corrosion inhibitor can be under the environment temperature of 15 DEG C -55 DEG C (preferably 35 DEG C -55 DEG C), with the work of gas phase volatilization
It is formed a film with mode in rebar surface, to carry out anti-corrosion application to building iron.
Or the gas phase corrosion inhibitor can be under the environment temperature of 15 DEG C -55 DEG C (preferably 15 DEG C -35 DEG C), to impregnate contact
The mode of action rebar surface formed protective film, thus to building iron carry out anti-corrosion application.
The present invention provides a kind of gas phase corrosion inhibitor, main component is aliphatic amino acid organic matter, this type organic comes
Asepsis environment-protecting is enriched in source, has carboxyl, amino, hydroxyl isopolarity group, all has good inhibition to different metal materials
Property, while good volatility, degradable feature are had both, metal watch is adsorbed by way of can contacting volatilization or directly
Face is to play resistance rust effect.
Technical effect: compared with the existing technology, present invention has the advantage that
(1) consider from atomic element and molecular structure level, gas phase corrosion inhibitor provided by the invention, involved ingredient contains
Have N, O hetero atom, and there are many hydroxyl, carboxyl and amino isopolarity groups for band, easily form chelate with Fe, enhance resistance rust at
Divide the adsorption capacity in rebar surface, to form reinforcing bar protective film.
(2) from the point of view of use, gas phase corrosion inhibitor provided by the invention has certain volatility, can pass through gas phase
Volatilization film forming and impregnate contact film forming two kinds of simple modes of action to building iron progress corrosion protection application, it is easy to operate simultaneously
And resistance rust significant effect.
(3) from the point of view of sustainable development, gas phase corrosion inhibitor provided by the invention is environmentally protective, prepares required big portion
Divide material simple and easy to get, purchase is convenient and cost is not high.
Detailed description of the invention
Fig. 1 is embodiment 1 (B), the morphology observation knot of rebar surface obtained by embodiment 2 (C) and blank control group (A)
Fruit；
Fig. 2 is that reinforcing bar electrode obtained by embodiment 1 (D) and embodiment 2 (E) and blank control group (F) is containing 3.5% chlorination
Erosion profile after being impregnated in the corrosive liquid of sodium；
Fig. 3 is that reinforcing bar electrode prepared by embodiment 1 and embodiment 2 is surveyed in the simulation hole solution containing 3.5% sodium chloride
The electrochemical impedance spectrogram of examination.
Specific embodiment
Reinforcing bar involved in specific implementation process institute is Q235 carbon steel, is common reinforcing bar type in concrete, ingredient:
99%Fe, 0.1-0.2%C, 0.5-0.6%Mn, 0.2-0.3%Si are 10mm × 10mm × 10mm using specification；
Bloom is first polishing to 800 mesh with water-proof abrasive paper by test reinforcing bar, ultrasonic in dehydrated alcohol after being processed by shot blasting
Wave cleaning, cold wind drying.Using one end as working face, the other end welds copper conductor, and Retention area is the work of 10mm × 10mm
Face, remaining is all closed with AB glue, and working face is polished step by step with 600,1000,1500,2000 mesh water-proof abrasive papers, is polished to mirror
Face, then it is cleaned by ultrasonic decontamination, degreasing with dehydrated alcohol, target reinforcing bar electrode is obtained after drying.
Embodiment 1
Formula:
Resistance rust ingredient and solvent, weight ratio 60:40, the resistance rust ingredient includes the raw material of following weight ratio:
45 parts of aliphatic amino acid (being selected from Beta-alanine), 25 parts of triethanolamine, 5 parts of benzotriazole, sodium benzoate 25
Part.
The solvent includes diethylene glycol and water, weight ratio 10:90.
Preparation method:
(1) benzotriazole is mixed in proportion with diethylene glycol, is stirred evenly；
(2) Beta-alanine, sodium benzoate are mixed in proportion with water, is stirred evenly；
(3) triethanolamine is weighed in proportion, it is mixed with mixture obtained by above-mentioned steps (1) and step (2), most
Gas phase corrosion inhibitor needed for obtaining eventually.
Gas phase corrosion inhibitor is applied to rebar surface in a manner of film forming of volatilizing: taking 10g gas phase resistance rust provided by the invention
Agent is placed in the beaker of 500mL, and target reinforcing bar electrode is hung on beaker mouth, with sealed membrane by the tight-lipped envelope of beaker, makes entire wide-mouth
Bottle forms closed device, and device context temperature is 35 DEG C -55 DEG C, and humidity 65%, target reinforcing bar is in this device and environment
Pre-filming treatment is for 24 hours.
Embodiment 2:
Formula:
Resistance rust ingredient and solvent, weight ratio 50:50, the resistance rust ingredient includes the raw material of following weight ratio:
50 parts of aliphatic amino acid (selected from amion acetic acid and glutamic acid), 22 parts of triethanolamine, 3 parts of benzotriazole, benzene first
25 parts of sour sodium.
The solvent includes diethylene glycol and water, weight ratio 15:85.
Preparation method:
(1) benzotriazole is mixed in proportion with diethylene glycol, is stirred evenly；
(2) amion acetic acid and glutamic acid, sodium benzoate are mixed in proportion with water, is stirred evenly；
(3) triethanolamine is weighed in proportion, it is mixed with mixture obtained by above-mentioned steps (1) and step (2), most
Gas phase corrosion inhibitor needed for obtaining eventually.
Gas phase corrosion inhibitor is applied to rebar surface in a manner of impregnating film forming: taking 10g gas phase resistance rust provided by the invention
Agent is placed in the bottom of the beaker of 500mL, and the working face of target reinforcing bar is contacted with the immersion of bottom of bottle corrosion inhibitor, with sealed membrane that beaker is tight-lipped
Envelope makes entire wide-mouth bottle form closed device, and device context temperature is 15-35 DEG C, and humidity 65%, target reinforcing bar electrode exists
Contact treatment is for 24 hours in this device and environment.
By above-mentioned gained target reinforcing bar electrode, performance evaluation, detailed process are carried out using test are as follows:
1. rebar surface morphology observation
For the performance for preferably comparing two kinds of embodiments, preprocessing process is as follows: one group of blank control group reinforcing bar of setting,
In the closed beaker of no gas phase corrosion inhibitor, same temperature is 15-55 DEG C, in the environment of humidity is 65%, stewing process
For 24 hours, since the directly processing gained target reinforcing bar of embodiment 2 remains many gas phase corrosion inhibitors, by 2 gained target reinforcing bar of embodiment
The macroscopic residue of electrode surface is rinsed with dehydrated alcohol, is become rusty after cold wind drying with embodiment 1 and blank control resistance
Reinforcing work face carries out morphology observation under a scanning electron microscope together；
Test result: observing under 10000 times of scanning multiple, compared with blank control group, 1 gained bar list of embodiment
Face is adsorbed with loose membrane substance；2 gained rebar surface of embodiment adsorbs apparent film layer substance, is seen compared to embodiment 1
The rebar surface observed, 2 rebar surface attachment of embodiment are more densely cross-linked uniformly.
In order to which effect benefit of the invention is explained further, blank control group, embodiment 1 and embodiment 2 will be immersed in
In etchant solution containing 3.5% sodium chloride, make further scanning reinforcement corrosion pattern, and carry out electrochemical property test.
2. erosion profile is observed
The sodium chloride and saturated calcium hydroxide clarified solution that corrosive liquid is 3.5% by mass fraction prepare gained；By above-mentioned institute
Reinforcing bar is immersed in corrosive liquid, and by the test block ultrasonic cleaning after immersion and cold wind dries up, and is seen under a scanning electron microscope
It examines；
Test result: as shown in Fig. 2, can be observed under 20000 times of Scanning Electron microscope, blank control group is in corruption
Apparent corrosion phenomenon is generated after impregnating in erosion liquid, the etch pit of out-of-flatness is presented because of seriously corroded for rebar surface；It is real
It applies example 1 and after 2 gained reinforcing bar of embodiment impregnates in corrosive liquid, corrosion phenomenon is significantly controlled, and rebar surface is still complete
Opposed flattened state is kept well.
3. electrochemical property test
By blank control group, embodiment 1 and 2 gained reinforcing bar electrode of embodiment be placed in corrosive liquid in, using AC impedence method,
The antiseptic property of sample is tested in two kinds of electrochemical method tests of electrokinetic potential linear polarization, and test macro is using three electricity
Polar body system, to test reinforcing bar as working electrode, saturated calomel electrode is reference electrode, and platinum electrode is auxiliary electrode, reinforcing bar electrode
It is immersed in corrosive liquid, after its spontaneous potential is stablized, is tested using PARSTAT4000 electrochemical workstation.
The test frequency range of electrochemical impedance spectroscopy is 0.01mHz~100KHz, and dynamic potential polarization curve scanning speed is
1mV/s, scanning range are -0.2~1.2V (opposite open circuit potential), and obtained polarization curve carries fitting software to electricity by instrument
Chemical parameters are fitted, and obtain corrosion electric current density icorr, polarization resistance RpEtc. parameters.Resistance rust efficiency and then basis
Stern-Geary formula (2) calculates:
Test result is as follows: Fig. 2 is the electrochemical impedance spectroscopy measured, compared to blank control group, embodiment 1 and embodiment
2 have bigger capacitive reactance arc, indicate that embodiment 1 and the resulting reinforcing bar of embodiment 2 have good anticorrosion performance, wherein embodiment
2 have bigger capacitive reactance arc than embodiment 1, and embodiment 2 has better anticorrosion performance；Table 1 is ginseng obtained by parameter fitting
The corrosion current of number, embodiment 1 and embodiment 2 is close than reducing one to two orders of magnitude, embodiment 1 relative to blank control group
With 95.7% resistance rust efficiency, embodiment 2 has 98.1% resistance rust efficiency.
The above test result, it was demonstrated that gas phase corrosion inhibitor of the invention remains unchanged in the high bar in chlorine salt solution containing 3.5% sodium chloride
With high resistant rust effect, volatilization film forming and the mode of action for impregnating two kinds of gas phase corrosion inhibitors of film forming, so that rebar surface absorption
Resistance rust substance, have apparent corrosion-suppressing effect to building iron；The mode of action for wherein impregnating film forming makes bar list
Face uniform adsorption close film layer so that reinforcing bar have it is stronger resist Chloride Attack ability.
1 linear polarisation curves fitting parameter of table
Claims (8)
1. a kind of gas phase corrosion inhibitor, which is characterized in that including resistance rust ingredient and solvent, weight ratio is (50-60): (40-50),
The solvent includes organic solvent and inorganic solvent, and resistance rust ingredient includes the raw material of following weight ratio:
45-50 parts of aliphatic amino acid, 20-25 parts of triethanolamine, 3-5 parts of benzotriazole, 25-30 parts of sodium benzoate.
2. gas phase corrosion inhibitor according to claim 1, which is characterized in that the solvent includes diethylene glycol and water, heavy
Amount is than being (10-15): (85-90).
3. gas phase corrosion inhibitor according to claim 1, which is characterized in that the aliphatic amino acid is Beta-alanine, paddy
The mixing of any one or more in propylhomoserin, amion acetic acid, asparagine or glutamine.
4. the preparation method of any one of the claim 1-3 gas phase corrosion inhibitor, which comprises the following steps:
(1) benzotriazole is mixed in proportion with organic solvent, is stirred evenly；
(2) aliphatic amino acid, sodium benzoate are mixed in proportion with inorganic solvent, is stirred evenly；
(3) triethanolamine is weighed in proportion, it is mixed with mixture obtained by above-mentioned steps (1) and step (2), final
Required gas phase corrosion inhibitor.
5. application of any one of the claim 1-3 gas phase corrosion inhibitor in terms of building iron corrosion protection.
6. application according to claim 5, which is characterized in that the mode of action that the gas phase corrosion inhibitor can be volatilized with gas phase
It forms a film in rebar surface, to carry out anti-corrosion application to building iron.
7. application according to claim 5, which is characterized in that the gas phase corrosion inhibitor can be to impregnate the mode of action contacted
Protective film is formed in rebar surface, to carry out anti-corrosion application to building iron.
8. being applied according to any one of claim 6 and 7, which is characterized in that the application environment temperature is 15 DEG C -55 DEG C.
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| CN110284141A (en) * | 2019-07-11 | 2019-09-27 | 中电保力（北京）科技有限公司 | A kind of gas phase corrosion inhibitor and the sustained release gas phase resistance tranish film box comprising it |
| CN110499512A (en) * | 2019-09-11 | 2019-11-26 | 王二坡 | One kind being applicable in environmentally friendly gaseous recombination corrosion inhibitor of more metals and preparation method thereof |
| CN114427096A (en) * | 2020-10-10 | 2022-05-03 | 中国石油化工股份有限公司 | Compound corrosion inhibitor suitable for storage tank gas phase area corrosion medium and preparation method thereof |
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