CN104692702A - High-performance steel bar corrosion inhibitor - Google Patents
High-performance steel bar corrosion inhibitor Download PDFInfo
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- CN104692702A CN104692702A CN201510096127.2A CN201510096127A CN104692702A CN 104692702 A CN104692702 A CN 104692702A CN 201510096127 A CN201510096127 A CN 201510096127A CN 104692702 A CN104692702 A CN 104692702A
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Abstract
The invention discloses a high-performance steel bar corrosion inhibitor, belonging to the technical field of building materials. The corrosion inhibitor is composed of the following components in percentage by mass: 0.2-0.4% of sodium molybdate, 0.2-0.4% of sodium citrate, 0.02-0.04% of thiocarbamide, 0.02-0.04% of neodymium sulfate and the balance of water. By compounding the anode corrosion inhibition component with the mixed corrosion inhibition component, the corrosion inhibitor has the advantages of high adsorptive power with steel bars, favorable adaptability to concrete and high corrosion resistance, can be directly incorporated into concrete, can form a compact protective film on the steel bar surface, does not influence the concrete performance, can perform the corrosion inhibition function on the steel bars, has the characteristics of high efficiency, no toxicity, no pollution and the like, is a high-performance steel bar corrosion inhibitor, and can be used for reinforced concrete structures in water conservancy, railways, civil buildings and the like.
Description
Technical field
The invention belongs to building material technical field, be specifically related to reinforcing steel bar corrosion inhibitor.
Background technology
Steel Concrete is a kind of economical and practical structured material, is used widely in the structures such as bridge, buildings, dykes and dams, subbottom tunnel and Offshore Platform, and reinforcement in concrete corrosion has become the principal element affecting 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, plays a protective role to reinforcing bar.But As time goes on, due to CO
2intrusion cause concrete carbonization, the basicity of concrete pore solutions reduces, and the passive film of rebar surface becomes unstable, if chlorion permeates to rebar surface in surrounding medium, can cause the heavy corrosion of reinforcing bar.
For the protection of reinforcing bar; rust inhibitor can effectively stop or delay the destruction of chlorion to rebar passivation film; the major advantage of reinforcing steel bar corrosion inhibitor once property uses and permanently effective, compared with epoxy deep layer, galvanic protection, adopts reinforcing steel bar corrosion inhibitor cost seldom; construction is simple, convenient; and reinforcing steel bar corrosion inhibitor is disposable mix in concrete after, do not need in lifetime safeguard, use range light; and in available a large amount of recovery project, effective to bar in chlorine salt solution especially.
Difference according to chemical composition, reinforcing steel bar corrosion inhibitor can be divided into three classes: the inorganic type primarily of inorganic substance composition, the organic type primarily of organic substance composition and the mixed type be made up of inorganic and organic substance.Inorganic type rust inhibitor mainly comprises nitrite, nitrate, chromic salt, dichromate, phosphoric acid salt, polyphosphate, silicate, molybdate etc., wherein nitrites is research application reinforcing steel bar corrosion inhibitor the earliest, and it is the Anodic Type rust inhibitor of a quasi-representative.But may local corrosion be caused, the carrying out of accelerated corrosion when incorporation is not enough.Organic type rust inhibitor comprises amine, alkamine, beautiful jade polyamine, alkanolamine, fatty acid ester and their salt, and its advantage is: (1) can provide corrosion protection to Steel Concrete under various chlorine ion concentration; (2) can disperse in concrete, thus can play restraining effect to reinforcement corrosion electrochemical cathode process, antianode corrosion electrochemistry process can play restraining effect again; (3) nontoxic, environmental protection.
The synergistic effect of rust inhibitor is a phenomenon extensively existed in resistance rust mechanism, for the action effect of reinforcing steel bar rust inhibitor, meet concrete structural performance requirements simultaneously, inorganic type and organic type rust inhibitor combine by people, research and development compound corrosion inhibitors for steel bar, such as Chinese patent 200610044239.4 discloses a kind of reinforcing steel bar corrosion inhibitor, each composition weight percentage composition is Sodium orthomolybdate 0.01 ~ 0.05%, diethylenetriamine 0.9 ~ 4.5%, Allyl thiourea 0.08 ~ 0.19%, 1, 4-butynediol 0.15 ~ 0.75%, all the other are water, wherein each component plays by the chemical action and absorption with reinforcing bar the effect hindering and become rusty, but diethylenetriamine wherein, 1, adsorption between 4-butynediol and reinforcing bar is little, make the bonding force between the reinforcing steel bar corrosion inhibitor of preparation and Steel Concrete little, it is lastingly not firm to act on.
Summary of the invention
In order to overcome the defect of prior art, the object of the present invention is to provide and a kind ofly hinder the significantly lasting reinforcing steel bar corrosion inhibitor of rust effect.
To achieve these goals, the technical solution used in the present invention is as follows:
A kind of high performance reinforcing bar anti-corrosion admixture, be made up of the component of following weight percentage: Sodium orthomolybdate 0.2 ~ 0.4%, Trisodium Citrate 0.2 ~ 0.4%, thiocarbamide 0.02 ~ 0.04%, Neodymium sulfate 0.02 ~ 0.04%, surplus is water.
Described high performance reinforcing bar anti-corrosion admixture is obtained by following preparation: by each component by formula ratio mixing, stir, to obtain final product.
Described high performance reinforcing bar anti-corrosion admixture directly mixes concrete and uses.
High performance reinforcing bar anti-corrosion admixture of the present invention is resistance rust composition by Sodium orthomolybdate, Trisodium Citrate, thiocarbamide and Neodymium sulfate, and to be that dispersion medium is composite form water.Wherein inorganic resistance rust composition Sodium orthomolybdate is as cathodic resistance rust composition, forms the protective membrane of one deck densification, play very large restraining effect to the corrosion of reinforcing bar in cathodic area; Organic resistance rust composition Trisodium Citrate and thiocarbamide as mixed type resistance rust composition, by with chlorion competitive adsorption, form fine and close protective membrane eventually through sequestering action at rebar surface, weaken the absorption of chlorion, reinforcing bar is played a protective role; Inorganic resistance rust composition Neodymium sulfate is water-soluble provides rare earth element neodymium ion, due to the effect of neodymium ion, effectively can suppress the carrying out of corrosion reaction process, play a protective role further to reinforcing bar.
High performance reinforcing bar anti-corrosion admixture of the present invention, by inorganic and organic resistance rust composition, anode and the composite use of mixed type resistance rust composition, each component mutually acts synergistically in the amount ranges limited, especially Trisodium Citrate and other components act synergistically, make rust inhibitor all have significant restraining effect to the cathodic reaction of corrosion process, anodic reaction, while not affecting concrete performance, promote concrete weather resistance.
High performance reinforcing bar anti-corrosion admixture of the present invention adds rare-earth salts Neodymium sulfate, neodymium ion can be produced after water-soluble, strengthen the adsorption of other components at rebar surface, make the adsorptive power of reinforcing steel bar corrosion inhibitor and reinforcing bar strong, good with concrete adaptability, corrosion resistance nature is high, directly can mix concrete, fine and close protective membrane is generated at rebar surface, neither affect concrete performance, the effect of resistance rust can be played again to reinforcing bar, effectively slow down and stop the corrosion of reinforced concrete, have efficient, nontoxic, free of contamination feature, can be used for water conservancy, railway, the skeleton constructions such as covil construction.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, but does not form any limitation of the invention.
The raw material Sodium orthomolybdate related in embodiment, Trisodium Citrate, thiocarbamide, Neodymium sulfate are commercially available prod.
Embodiment 1
The present embodiment high performance reinforcing bar anti-corrosion admixture, is made up of the component of following mass percentage: Sodium orthomolybdate 0.2%, Trisodium Citrate 0.4%, thiocarbamide 0.02%, Neodymium sulfate 0.04%, and surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component weighed by mass percentage, mixes and stirs, to obtain final product.
Embodiment 2
The present embodiment high performance reinforcing bar anti-corrosion admixture, is made up of the component of following mass percentage: Sodium orthomolybdate 0.3%, Trisodium Citrate 0.3%, thiocarbamide 0.04%, Neodymium sulfate 0.02%, and surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component weighed by mass percentage, mixes and stirs, to obtain final product.
Embodiment 3
The present embodiment high performance reinforcing bar anti-corrosion admixture, is made up of the component of following mass percentage: Sodium orthomolybdate 0.4%, Trisodium Citrate 0.2%, thiocarbamide 0.03%, Neodymium sulfate 0.03%, and surplus is water.Described reinforcing steel bar corrosion inhibitor is prepared by following methods: each component weighed by mass percentage, mixes and stirs, to obtain final product.
Test 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 ", test the salt water resistance saturating machine of the rust inhibitor described in the embodiment of the present invention 1, embodiment 2, embodiment 3, test result is as shown in table 1:
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 | 0.02 | 0.03 | 0.06 |
| Embodiment 2 | 0.02 | 0.04 | 0.07 |
| Embodiment 3 | 0.02 | 0.04 | 0.07 |
Data shown in above-mentioned table 1 show, the salt water resistance performance of rust inhibitor prepared by the embodiment of the present invention 1 ~ 3 meets code requirement, and after 30 days, still there is good corrosion resistance nature in corrosion, anticorrosion performance is effective lastingly, show that the present invention prepares rust inhibitor and reinforcing bar adsorptive power is strong, anticorrosion performance is good, persistent.
Claims (1)
1. a high performance reinforcing bar anti-corrosion admixture, is characterized in that, is made up of the component of following weight percentage: Sodium orthomolybdate 0.2 ~ 0.4%, Trisodium Citrate 0.2 ~ 0.4%, thiocarbamide 0.02 ~ 0.04%, Neodymium sulfate 0.02 ~ 0.04%, and surplus is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510096127.2A CN104692702A (en) | 2015-03-04 | 2015-03-04 | High-performance steel bar corrosion inhibitor |
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| CN201510096127.2A CN104692702A (en) | 2015-03-04 | 2015-03-04 | High-performance steel bar corrosion inhibitor |
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| CN104692702A true CN104692702A (en) | 2015-06-10 |
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| CN201510096127.2A Pending CN104692702A (en) | 2015-03-04 | 2015-03-04 | High-performance steel bar corrosion inhibitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105884237A (en) * | 2016-05-12 | 2016-08-24 | 陆静 | Concrete rust inhibitor |
| CN107352829A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of resistance rust composition and compound corrosion inhibitor, the preparation method and application of compound corrosion inhibitor |
| 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 |
| 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 |
| CN110922083A (en) * | 2019-12-09 | 2020-03-27 | 庄明磊 | Rust inhibitor for reinforced concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139151A (en) * | 1994-06-22 | 1997-01-01 | 唐山工程技术学院 | Prepn of efficient antirusting water-base cutting fluid |
| CN102079640A (en) * | 2010-12-14 | 2011-06-01 | 李丽 | High corrosion resistance reinforced concrete corrosion inhibitor |
-
2015
- 2015-03-04 CN CN201510096127.2A patent/CN104692702A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139151A (en) * | 1994-06-22 | 1997-01-01 | 唐山工程技术学院 | Prepn of efficient antirusting water-base cutting fluid |
| CN102079640A (en) * | 2010-12-14 | 2011-06-01 | 李丽 | High corrosion resistance reinforced concrete corrosion inhibitor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105884237A (en) * | 2016-05-12 | 2016-08-24 | 陆静 | Concrete rust inhibitor |
| CN107352829A (en) * | 2017-07-24 | 2017-11-17 | 洛阳理工学院 | A kind of resistance rust composition and compound corrosion inhibitor, the preparation method and application of compound corrosion inhibitor |
| 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 |
| 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 |
| CN110922083A (en) * | 2019-12-09 | 2020-03-27 | 庄明磊 | Rust inhibitor for reinforced concrete and preparation method thereof |
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Application publication date: 20150610 |
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