CN104743953B - Low-cost rebar corrosion inhibitor - Google Patents
Low-cost rebar corrosion inhibitor Download PDFInfo
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- CN104743953B CN104743953B CN201510096129.1A CN201510096129A CN104743953B CN 104743953 B CN104743953 B CN 104743953B CN 201510096129 A CN201510096129 A CN 201510096129A CN 104743953 B CN104743953 B CN 104743953B
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- corrosion inhibitor
- corrosion
- corrosion inhibition
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Abstract
The invention discloses a low-cost rebar corrosion inhibitor and belongs to the technical field of building materials. The corrosion inhibitor is compounded of corrosion inhibition components (sodium benzoate, sodium acetate, thiocarbamide and magnesium oxide) and water serving as a dispersion medium, wherein sodium benzoate is an organic type corrosion inhibition component and belongs to anodic corrosion inhibition components; sodium acetate and thiocarbamide are organic type corrosion inhibition components and belong to mixed type corrosion inhibition components; magnesium oxide is an inorganic type corrosion inhibition component; therefore, the corrosion inhibitor disclosed by the invention is compounded of the organic and inorganic corrosion inhibition components and also is a mixture and a composition of the anodic corrosion inhibition component and the mixed type corrosion inhibition component, so that the prepared corrosion inhibitor has obvious inhibition effects on the anodic reaction and cathodic reaction in the rebar corrosion process, the defects of singly using organic or inorganic corrosion inhibition component is overcome. The corrosion inhibitor is low in price, low in use amount, non-toxic and pollution-free, and can be used in a way of being directly mixed with concrete, is well adapted to the concrete, and can be widely applied to reinforced concrete structure of water conservancy, railways, and civil buildings.
Description
Technical field
The invention belongs to building material technical field and in particular to a kind of low cost reinforcing steel bar corrosion inhibitor.
Background technology
Armored concrete is a kind of economical and practical structural material, in bridge, building, dykes and dams, seabed tunnel and large-scale
It is used widely in the structures such as ocean platform.Reinforcement in concrete corrosion has become impact reinforced concrete structure durability
Principal element.In newly-built armored concrete, due to the presence of high alkalinity Pore Solution, rebar surface can generate one layer of passivating film,
Reinforcing bar is played a protective role.But As time goes on, due to co2Intrusion cause the carbonization of concrete, concrete pore
The basicity of liquid reduces, and the passivating film of rebar surface becomes unstable, and in surrounding medium, chloride ion permeates to rebar surface, can cause
The heavy corrosion of reinforcing bar.
The mechanism of action of reinforcing steel bar corrosion inhibitor is to make rebar surface form completely fine and close passivating film, and passivating film is subject to local
(as cl during destruction-Invade), corrosion inhibitor can make passivating film in time, automatically repair, thus effectively stoping harmful ion to reinforcing bar
Erosion.Even if rebar surface has occurred and that corrosion, corrosion inhibitor also can suppress the electrochemical process of reinforcement corrosion, makes corrosion rate
It is greatly lowered.
Difference according to chemical composition, reinforcing steel bar corrosion inhibitor can be divided into three classes: the main inorganic type being made up of inorganic substances, master
The organic type to be made up of organic substance and the mixed type being made up of inorganic and organic substance.
Inorganic type corrosion inhibitor mainly include nitrite, nitrate, chromate, bichromate, phosphate, polyphosphate,
Silicate, molybdate etc., wherein nitrites are the earliest reinforcing steel bar corrosion inhibitors of research application, and it is the Anodic Type of a quasi-representative
Corrosion inhibitor.But local corrosion, the carrying out of accelerated corrosion may be led to when incorporation is not enough.
Organic type corrosion inhibitor include amine, alkamine, beautiful jade polyamine, alkanolamine, fatty acid ester and they
Salt, its advantage is: (1) can provide corrosion protection to armored concrete under various chlorine ion concentrations；(2) can be in concrete
Middle dispersion, thus reinforcement corrosion electrochemical cathode process can be risen with inhibitory action, anodic attack electrochemical process can be risen again
Inhibitory action；(3) nontoxic, environmental protection.
The cooperative effect of corrosion inhibitor is a phenomenon being widely present in resistance rust mechanism.For reinforcing steel bar corrosion inhibitor
Action effect, meets the structural performance requirements of concrete simultaneously, and different types of corrosion inhibitor is combined by people, research and development
Compound corrosion inhibitors for steel bar, and put into engineer applied, such as Chinese patent cn1827770a discloses a kind of corrosion inhibitor by molybdenum
Sour sodium 0.01～0.05%, diethylenetriamine 0.9%～4.5%, Allyl thiourea 0.08%～0.19%, Isosorbide-5-Nitrae-butynediols
0.15%～0.75%, balance of water composition, Chinese patent cn102491668 discloses a kind of corrosion inhibitor by silicate 0.1%
～0.5%, metasilicate 0.1%～1.5%, organic amine 0.1%～1.5%, gluconic acid 0.1%～1.5%, balance of water
Composition, corrosion inhibitor disclosed above is compound corrosion inhibitors for steel bar, but its resistance rust component content is high, high cost, economic effect
Benefit is low, is not easy to industrial application.
Therefore, research and develop a kind of resistance rust component prescription simply, the few reinforcing steel bar corrosion inhibitor of consumption, to promotion reinforced concrete
The industrial development of soil is significant.
Content of the invention
In order to realize overcoming the defect of prior art, it is an object of the invention to provide a kind of low cost reinforcing steel bar corrosion inhibitor.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of low cost reinforcing steel bar corrosion inhibitor, is grouped into by the group of following weight percentage: sodium benzoate 0.1～0.3%,
Sodium Acetate Trihydrate 0.1～0.3%, thiourea 0.01～0.03%, magnesium oxide 0.01～0.03%, balance of water.
Described low cost reinforcing steel bar corrosion inhibitor is prepared by following methods: each component is weighed by mass percentage, mixing
And stir, obtain final product.
Described low cost reinforcing steel bar corrosion inhibitor, can be directly incorporated in concrete during use.
Present invention low cost reinforcing steel bar corrosion inhibitor is resistance rust composition by sodium benzoate, Sodium Acetate Trihydrate, thiourea, magnesium oxide, with water is
Disperse medium compounds and forms.Wherein sodium benzoate hinders rust composition for organic type, belongs to Anodic Type resistance rust composition, can be in anode region shape
Become one layer of fine and close protecting film, very big inhibitory action is played in the corrosion to reinforcing bar；Sodium Acetate Trihydrate is become rusty into for organic type resistance with thiourea
Point, belong to mixed type resistance rust composition, by with chloride ion competitive Adsorption, form densification eventually through chelation in rebar surface
Protecting film, weaken chloride ion absorption, reinforcing bar is played a protective role；Magnesium oxide hinders rust composition for inorganic type, meets water and can give birth to
Become magnesium hydroxide, the high alkalinity of concrete pore solutions can be maintained, further reinforcing bar is played a protective role.Therefore, steel of the present invention
Bar rust inhibitor, with multiple organic and inorganic resistance rust compositions as base material, is compounded for disperse medium with water and forms, and mix compounding anode resistance
Rust composition and mixed type resistance rust composition, make the corrosion inhibitor of preparation that the anode reaction of reinforcement corrosion process, cathode reaction are respectively provided with
Significantly inhibitory action, each component mutual synergism in the amount ranges limiting, improves the anticorrosion performance of corrosion inhibitor, lifting
The endurance quality of concrete and the comprehensive resistance to corrosion of concrete.
Extensively, price is low, can be directly incorporated in concrete and use for present invention low cost reinforcing steel bar corrosion inhibitor raw material sources, and mixed
The adaptability of solidifying soil is good.Compare existing antirust for reinforced concrete, antirust for reinforced concrete resistance rust Ingredient Amount of the present invention
Few, low cost, can both reduce the usage amount of corrosion inhibitor in the fine and close protecting film of reinforcing steel bar corrosion inhibitor Surface Creation, and in not shadow
Play resistance rust to reinforcing bar while the performance ringing concrete to act on.
Present invention low cost reinforcing steel bar corrosion inhibitor, have low cost, consumption few, nontoxic, pollution-free the features such as, effectively alleviate and
Stop the corrosion of reinforced concrete, for, in the reinforced concrete structures such as water conservancy, railway, civil buildings, significantly extending
The service life of building, brings significant economic benefit and social benefit.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, but does not constitute any limit to the present invention
System.
The starting benzoic acid sodium, Sodium Acetate Trihydrate, thiourea and the magnesium oxide that are related in embodiment are commercially available prod.
Embodiment 1
The present embodiment low cost reinforcing steel bar corrosion inhibitor is to be grouped into by the group of following mass percent: sodium benzoate 0.1%, vinegar
Sour sodium 0.3%, thiourea 0.01%, magnesium oxide 0.03%, balance of water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods:
Each component is weighed by mass percentage, is mixed and stirred for uniformly, obtaining final product.
When the present embodiment low cost reinforcing steel bar corrosion inhibitor mixes concrete use, every cubic metre of concrete incorporation is 1kg,
Less than the 4～10kg/m specifying the recommendation of area's corrosion inhibitor under water in " reinforcing steel bar corrosion inhibitor uses technical regulation "3The mixing of concrete
Enter amount, reduce the consumption of corrosion inhibitor.
Embodiment 2
The present embodiment low cost reinforcing steel bar corrosion inhibitor is to be grouped into by the group of following mass percent: sodium benzoate 0.2%, vinegar
Sour sodium 0.2%, thiourea 0.03%, magnesium oxide 0.01%, balance of water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods:
Each component is weighed by mass percentage, is mixed and stirred for uniformly, obtaining final product.
When the present embodiment low cost reinforcing steel bar corrosion inhibitor mixes concrete use, every cubic metre of concrete incorporation is 1kg,
Less than the 4～10kg/m specifying the recommendation of area's corrosion inhibitor under water in " reinforcing steel bar corrosion inhibitor uses technical regulation "3The mixing of concrete
Enter amount, reduce the consumption of corrosion inhibitor.
Embodiment 3
The present embodiment low cost reinforcing steel bar corrosion inhibitor is to be grouped into by the group of following mass percent: sodium benzoate 0.3%, vinegar
Sour sodium 0.1%, thiourea 0.02%, magnesium oxide 0.02%, balance of water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods:
Each component is weighed by mass percentage, is mixed and stirred for uniformly, obtaining final product.
When the present embodiment low cost reinforcing steel bar corrosion inhibitor mixes concrete use, every cubic metre of concrete incorporation is 1kg,
Less than the 4～10kg/m specifying the recommendation of area's corrosion inhibitor under water in " reinforcing steel bar corrosion inhibitor uses technical regulation "3The mixing of concrete
Enter amount, reduce the consumption of corrosion inhibitor.
Test example
According to jt/t537-2004 " antirust for reinforced concrete " and yb/t9231-98, " reinforcing steel bar corrosion inhibitor is advised using technology
Journey " requirement, the salt water resistance saturating machine of the corrosion inhibitor described in the embodiment of the present invention 1, embodiment 2, embodiment 3 is surveyed
Examination, test result is as shown in table 1:
Corrosion weight-loss ratio (%) in 3.5%nacl solution for the table 1 reinforcing bar hpb235
| Corrosion inhibitor | Corrosion 10 days | Corrosion 20 days | Corrosion 30 days |
| No | 0.08 | 0.11 | 0.18 |
| Embodiment 1 | 0.03 | 0.05 | 0.08 |
| Embodiment 2 | 0.02 | 0.04 | 0.08 |
| Embodiment 3 | 0.03 | 0.05 | 0.07 |
Result shown in above-mentioned table 1 shows, the salt water resistance impregnated structures compliant of reinforcing steel bar corrosion inhibitor of the present invention requires, that is,
Show reinforcing steel bar corrosion inhibitor of the present invention while the resistance rust Ingredient Amount reducing, the resistance rust effect to armored concrete for the same realization
Really.
Claims (1)
1. a kind of low cost reinforcing steel bar corrosion inhibitor is it is characterised in that be grouped into by the group of following weight percentage: sodium benzoate
0.1～0.3%, Sodium Acetate Trihydrate 0.1～0.3%, thiourea 0.01～0.03%, magnesium oxide 0.01～0.03%, balance of water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096129.1A CN104743953B (en) | 2015-03-04 | 2015-03-04 | Low-cost rebar corrosion inhibitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510096129.1A CN104743953B (en) | 2015-03-04 | 2015-03-04 | Low-cost rebar corrosion inhibitor |
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| Publication Number | Publication Date |
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| CN104743953A CN104743953A (en) | 2015-07-01 |
| CN104743953B true CN104743953B (en) | 2017-01-18 |
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| CN201510096129.1A Active CN104743953B (en) | 2015-03-04 | 2015-03-04 | Low-cost rebar corrosion inhibitor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107352826A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of reinforcing bar resistance rust composition, reinforcing steel bar corrosion inhibitor and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102320771B (en) * | 2010-08-04 | 2013-01-23 | 浙江五龙新材股份有限公司 | Reinforced concrete rust inhibitor |
| CN102079640A (en) * | 2010-12-14 | 2011-06-01 | 李丽 | High corrosion resistance reinforced concrete corrosion inhibitor |
| CN102617062B (en) * | 2012-04-06 | 2014-03-26 | 厦门大学 | Nitrite-free compound type steel bar corrosion inhibitor |
| CN103172290B (en) * | 2013-02-25 | 2014-11-26 | 洛阳理工学院 | Environment-friendly reinforcing bar corrosion inhibitor |
| CN103172292B (en) * | 2013-02-25 | 2014-12-24 | 洛阳理工学院 | Composite steel bar rust inhibitor |
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