CN103172290B - Environment-friendly reinforcing bar corrosion inhibitor - Google Patents
Environment-friendly reinforcing bar corrosion inhibitor Download PDFInfo
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- CN103172290B CN103172290B CN201310058577.3A CN201310058577A CN103172290B CN 103172290 B CN103172290 B CN 103172290B CN 201310058577 A CN201310058577 A CN 201310058577A CN 103172290 B CN103172290 B CN 103172290B
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- reinforcing bar
- corrosion
- corrosion inhibitor
- concrete
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Abstract
The invention discloses an environment-friendly reinforcing bar corrosion inhibitor comprising the following components in percentage by mass: 0.5-1.5% of sodium benzoate, 0.5-1.5% of sodium silicate, 0.5-1.5% of gluconic acid, 0.5-1.5% of citric acid and the balance of water. According to the invention, the anode type corrosion inhibiting components are compounded with mixed type corrosion inhibiting components, so that the environment-friendly reinforcing bar corrosion inhibitor is little in dosage, strong in corrosion inhibiting effect, strong in reinforcing bar adsorption force and good in concrete adaptability and can be directly coated on the surface of the reinforcing bar to form a compact protective film to ensure that the effective utilization rate of the corrosion inhibitor is increased and a corrosion inhibiting effect is provided while the concrete performances are not influenced at the same time; and the corrosion inhibitor is capable of effectively slowing down and preventing the corrosion of the reinforcing bar in the reinforced concrete, has the characteristics of no nitrite, no alkali, no toxin, no pollution and the like and can be widely used for reinforced concrete structures such as water conservancy, railways and civil architectures.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of environmental protection steel bar rust inhibitor.
Background technology
As a kind of economical and practical structured material, Steel Concrete is widely used in the structures such as bridge, buildings, dykes and dams, subbottom tunnel and Offshore Platform.Reinforcement in concrete corrosion has become the world today affects the principal element of reinforced concrete structure durability.In newly-built Steel Concrete, due to the existence of high alkalinity Pore Solution, rebar surface can generate one deck passive film, and reinforcing bar is played a protective role.But As time goes on, due to CO
2intrusion cause concrete carbonization, the basicity of concrete pore solutions reduces, the passive film of rebar surface becomes unstable, if chlorion permeates to rebar surface in surrounding medium, can cause the severe pitting of reinforcing bar.
Reinforcing steel bar corrosion inhibitor can stop or slow down reinforcement corrosion, and its mechanism of action is to make rebar surface to form the passive film of complete densification, when passive film is subject to local failure (as Cl
-invade), rust inhibitor can make passive film in time, automatically repair, thereby effectively stop the erosion of harmful ion to reinforcing bar.Even if rebar surface has formed corrosion microbattery, rust inhibitor also can suppress the electrochemical process of reinforcement corrosion, and erosion rate is significantly reduced.
Reinforcing steel bar corrosion inhibitor can be divided into Anodic Type and cathode type by the mechanism of action.Anodic Type reinforcing steel bar corrosion inhibitor refers to the material that can stop or slow down anodic process, typical chemical substance has chromic salt, nitrite etc., they can form passive film at rebar surface, its nitrite is the reinforcing steel bar corrosion inhibitor of applying the earliest, its shortcoming is: in the time that incorporation is not enough, can cause local corrosion, the carrying out of accelerated corrosion; Such rust inhibitor is poisonous, is carcinogenic substance, has prohibited use in some countries and regions; Cathode type reinforcing steel bar corrosion inhibitor is can stop or the material of slowing down cathode process, and as some phosphoric acid salt and some organic compound, although this class material is not dangerous, when it uses separately, its resistance rust effect is undesirable, can't meet the requirement of use; Mostly rust inhibitor of the prior art is to mix in concrete in the time of concrete-agitating, and usage quantity is large, cannot ensure being uniformly distributed and can affecting concrete performance on rebar surface.
Summary of the invention
The object of this invention is to provide a kind of environmental protection steel bar rust inhibitor, without nitrite, nontoxic pollution-free, consumption is few and the effect of resistance rust is strong.
In order to realize above object, the technical solution adopted in the present invention is: a kind of environmental protection steel bar rust inhibitor, is made up of the component of following mass percent: Sodium Benzoate 0.5%～1.5%, water glass 0.5%～1.5%, gluconic acid 0.5%～1.5%, citric acid 0.5%～1.5%, surplus is water.
Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component is weighed by mass percentage, mix and stir, to obtain final product.
Environmental protection steel bar rust inhibitor of the present invention, can directly be coated on rebar surface when use.
Environmental protection steel bar rust inhibitor of the present invention, taking multiple organic and inorganic thing as synthetic base-material, forms as dispersion medium is composite taking water.Wherein, Sodium Benzoate and water glass, as Anodic Type resistance rust composition, can form in positive column the protective membrane of one deck densification, and the corrosion of reinforcing bar is played to very large restraining effect.Gluconic acid and citric acid be as mixed type resistance rust composition, by with chlorion competitive adsorption, finally form fine and close protective membrane by sequestering action at rebar surface, the absorption of weakening chlorion, plays a protective role to reinforcing bar; Mixed type resistance rust composition, the cathodic reaction to corrosion process, anodic reaction to corrosion process all have significant restraining effect.Environmental protection steel bar rust inhibitor of the present invention utilizes the synergistic effect between glucose saccharic acid, citric acid and Sodium Benzoate and water glass, improve the anticorrosion performance of rust inhibitor, promote concrete endurance quality and concrete comprehensive resistance to corrosion, the working life of significant prolongation buildings, can bring significant economic benefit and social benefit.
Environmental protection steel bar rust inhibitor of the present invention, adopt Anodic Type resistance rust composition and mixed type resistance rust composition composite, consumption is few and the effect of resistance rust is strong, strong with the adsorptive power of reinforcing bar, good with concrete adaptability, can directly be coated on rebar surface, generate fine and close protective membrane, both improve the effective rate of utilization of rust inhibitor, in not affecting concrete performance, played again the effect of resistance rust; Can effectively slow down and stop the corrosion of reinforced concrete, have without nitrite, alkali-free, the feature such as nontoxic, pollution-free, can be widely used in the skeleton constructions such as water conservancy, railway, covil construction.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
The environmental protection steel bar rust inhibitor of the present embodiment, is made up of the component of following mass percent: Sodium Benzoate 1.5%, and water glass 0.5%, gluconic acid 1.0%, citric acid 1.0%, surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component is weighed by mass percentage, mix and stir, to obtain final product.
Embodiment 2
The environmental protection steel bar rust inhibitor of the present embodiment, is made up of the component of following mass percent: Sodium Benzoate 1.0%, and water glass 1.0%, gluconic acid 0.5%, citric acid 1.5%, surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component is weighed by mass percentage, mix and stir, to obtain final product.
Embodiment 3
The environmental protection steel bar rust inhibitor of the present embodiment, is made up of the component of following mass percent: Sodium Benzoate 0.5%, and water glass 1.5%, gluconic acid 1.5%, citric acid 0.5%, surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component is weighed by mass percentage, mix and stir, to obtain final product.
Experimental example
According to the requirement of JT/T537-2004 " antirust for reinforced concrete " and YB/T9231-98 " reinforcing steel bar corrosion inhibitor operation technique code ", environmental protection steel bar rust inhibitor described in embodiments of the invention 1, embodiment 2, embodiment 3 is carried out to the test of salt water resistance saturating machine, and test result (in table 1) meets code requirement.
The corrosion rate of weight loss (%) of table 1 reinforcing bar HPB235 in 3.5%NaCl solution
| Rust inhibitor | Corrode 10 days | Corrode 20 days | Corrode 30 days |
| Nothing | 0.08 | 0.11 | 0.18 |
| Embodiment 1 | 0.01 | 0.04 | 0.07 |
| Embodiment 2 | 0.02 | 0.04 | 0.08 |
| Embodiment 3 | 0.02 | 0.05 | 0.08 |
Claims (1)
1. an environmental protection steel bar rust inhibitor, is characterized in that: the component by following mass percent forms: Sodium Benzoate 0.5%～1.5%, and water glass 0.5%～1.5%, gluconic acid 0.5%～1.5%, citric acid 0.5%～1.5%, surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058577.3A CN103172290B (en) | 2013-02-25 | 2013-02-25 | Environment-friendly reinforcing bar corrosion inhibitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310058577.3A CN103172290B (en) | 2013-02-25 | 2013-02-25 | Environment-friendly reinforcing bar corrosion inhibitor |
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| CN103172290A CN103172290A (en) | 2013-06-26 |
| CN103172290B true CN103172290B (en) | 2014-11-26 |
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| CN201310058577.3A Expired - Fee Related CN103172290B (en) | 2013-02-25 | 2013-02-25 | Environment-friendly reinforcing bar corrosion inhibitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103359966A (en) * | 2013-07-04 | 2013-10-23 | 华南理工大学 | Composite rebar corrosion inhibitor and preparation method thereof |
| CN104743953B (en) * | 2015-03-04 | 2017-01-18 | 洛阳理工学院 | Low-cost rebar corrosion inhibitor |
| CN105884237A (en) * | 2016-05-12 | 2016-08-24 | 陆静 | Concrete rust inhibitor |
| CN107352830A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of resistance rust composition and environment-friendly type corrosion inhibitor, the preparation method and application of environment-friendly type corrosion inhibitor |
| CN107352827A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of low-dosage is composite type reinforced to hinder rust composition, low-dosage compound corrosion inhibitors for steel bar and its preparation method and application |
| CN112759421A (en) * | 2021-02-26 | 2021-05-07 | 水利部交通运输部国家能源局南京水利科学研究院 | Reinforced concrete external coating corrosion inhibitor under severe cold complex conditions and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102167537A (en) * | 2011-01-27 | 2011-08-31 | 南京瑞迪高新技术公司 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
| CN102491668A (en) * | 2011-11-18 | 2012-06-13 | 泰山医学院 | Environment-friendly high temperature activated water-based rebar rust inhibitor |
| CN102503237A (en) * | 2011-11-09 | 2012-06-20 | 上海大学 | Method for preparing novel steel bar rust resistant agent |
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2013
- 2013-02-25 CN CN201310058577.3A patent/CN103172290B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167537A (en) * | 2011-01-27 | 2011-08-31 | 南京瑞迪高新技术公司 | Reinforced concrete antirust agent with sulfate corrosion resistant function |
| CN102503237A (en) * | 2011-11-09 | 2012-06-20 | 上海大学 | Method for preparing novel steel bar rust resistant agent |
| CN102491668A (en) * | 2011-11-18 | 2012-06-13 | 泰山医学院 | Environment-friendly high temperature activated water-based rebar rust inhibitor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN103172290A (en) | 2013-06-26 |
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Granted publication date: 20141126 Termination date: 20160225 |