CN105152559A - Method for preparing corrosion inhibitor for reinforced concrete - Google Patents
Method for preparing corrosion inhibitor for reinforced concrete Download PDFInfo
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- CN105152559A CN105152559A CN201510725972.1A CN201510725972A CN105152559A CN 105152559 A CN105152559 A CN 105152559A CN 201510725972 A CN201510725972 A CN 201510725972A CN 105152559 A CN105152559 A CN 105152559A
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Abstract
The invention relates to a method for preparing corrosion inhibitor for reinforced concrete, and belongs to the technical field of corrosion inhibitor. The method includes the step of evenly mixing 20-30 weight parts of calcium sulphoaluminate, 3-6 weight parts of ethylenediamine tetraacetic acid tetrasodium salt, 2-5 weight parts of aluminum dihydrogen tripolyphosphate, 4-6 weight parts of amino alcohol, 1-3 weight parts of surface active agent and 4-6 weight parts of sepiolite fiber. By means of the corrosion inhibitor for reinforced concrete, concrete can be well prevented from being corroded and damaged in the high-salt environment after being solidified.
Description
Technical field
The present invention relates to a kind of preparation method of Steel Concrete rust inhibitor, belong to rust inhibitor technical field.
Background technology
Reinforcement corrosion becomes the principal element that the world today affects concrete durability, and especially in bar in chlorine salt solution, reinforcement corrosion is primary factor.For this reason, people have researched and developed a series of safeguard procedures, and wherein reinforcing steel bar corrosion inhibitor is one of important technology.In the method preventing metallic corrosion, " inhibiter " is one of common method.The application of inhibiter has had the history of upper a century, reinforcing steel bar corrosion inhibitor to be the application of inhibiter in concrete, is a kind of not only ancient but also novel technology.
Include by action principle classification: 1, Anodic Type: a reinforcement in concrete corrosion normally electrochemical process.All materials that can stop or slow down anodic process are referred to as Anodic Type rust inhibitor.Typical chemical substance has chromic salt, nitrite, molybdate etc.They can be formed " passive film " at rebar surface.Early stage conventional nitrite does the major ingredient of reinforcing steel bar corrosion inhibitor.The shortcoming of this type of rust inhibitor be chlorine ion concentration large to a certain extent time can produce local corrosion and accelerated corrosion, be referred to as " danger " rust inhibitor.In addition such rust inhibitor in addition carcinogenic, cause alkali-aggregate reaction, affect the bad points such as the slump, therefore now seldom to use as rust inhibitor.2, cathode type: by absorption film-forming, can stop or the material of slowing down cathode process.As zincate, some phosphoric acid salt and some organic compound etc.Although this kind of material is not dangerous, during independent role, its usefulness is obvious not as Anodic Type.3, mixed type: by cathode type, Anodic Type, raising resistor-type, reduce the reasonably combined comprehensive rust inhibitor of the many kinds of substances such as oxidation.
CN102617062A discloses a kind of compound corrosion inhibitors for steel bar without nitrite, consisting of by mass percentage: diisooctyl sebacate 70% ~ 85%, maltonic acid sodium 3% ~ 6%, Zinc vitriol 12% ~ 27%; During use, in every premium on currency (being directly used in the concrete water of mixing), add the compound corrosion inhibitors for steel bar without nitrite of 1.5 ~ 4.5g.CN101844889A proposes a kind of compound organic reinforcing steel bar rust inhibitor for Steel Concrete.Compound organic reinforcing steel bar rust inhibitor of the present invention is made up of amino alcohol, alkylamide hydrochlorate, defoamer and water, and each component is formulated as follows by mass percentage: amino alcohol 10 ~ 25%, alkylamide hydrochlorate 5 ~ 15%, defoamer 0.025 ~ 0.45%, water 60 ~ 84%.But above-mentioned rust inhibitor after long-term use, there is the problem that resistance rust effect is bad.
Summary of the invention
The object of the invention is: provide a kind of favorable rust preventing effect for Steel Concrete rust inhibitor.
Technical scheme:
A preparation method for Steel Concrete rust inhibitor, comprises the steps:
By weight, calcium sulphoaluminate 20 ~ 30 parts, tetrasodium ethylenediamine tetraacetate 3 ~ 6 parts, aluminium dihydrogen tripolyphosphate 2 ~ 5 parts, amino alcohol 4 ~ 6 parts, 1 ~ 3 part, tensio-active agent, sepiolite fibre 4 ~ 6 parts are mixed.
Described amino alcohol is selected from the mixing of one or more in Tutofusin tris, DEAE diethylaminoethanol or 2-amino-2-methyl-1-propanol.
Tensio-active agent is selected from the mixing of one or more in oleic acid, palmitinic acid, sodium oleate, potassium palmitate, oleic acid or trolamine.
Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.
Described combination treatment adopts the stirring velocity of 800 ~ 1800 revs/min, and churning time is 10 ~ 20 minutes.
The application of above-mentioned Steel Concrete rust inhibitor in concrete is antirust.
The consumption of described rust inhibitor in cement is 1 ~ 5% of cement weight.
The mechanism of action:
Calcium sulphoaluminate is that swelling agent can generate ettringite in cement hydration process, produces microdilatancy, reduces concrete pore rate, improves concrete hole structure, thus improve the ability of concrete resisting chloride ion penetration and sulphate attack.Tetrasodium ethylenediamine tetraacetate cathodic area and positive column all precipitable, the dissolving of anode metal can be hindered, oxygen can be hindered again close to negative electrode generation reduction reaction.Polyoxyethylene alkylphenol base ether can improve the dispersiveness of inorganics, improves with the resistance of inorganics effect of becoming rusty.Can there is gel conversion in aluminium dihydrogen tripolyphosphate, form protective membrane at reinforcing bar and concrete surface in acid condition.Amino alcohol is efficient in Steel Concrete plays the effect suppressing chlorion.Sepiolite fibre be play to maintain the effect of inside concrete cross-linked network.
beneficial effect
The rust inhibitor of the reinforcement of concrete provided by the invention can play preferably concrete curing after the effect that is damaged by corrosion under hypersaline environment.
Embodiment
Embodiment 1
By weight, calcium sulphoaluminate 20 parts, tetrasodium ethylenediamine tetraacetate 3 parts, aluminium dihydrogen tripolyphosphate 2 parts, Tutofusin tris 4 parts, palmitinic acid 1 part, sepiolite fibre 4 parts are mixed.Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.Combination treatment adopts the stirring velocity of 1200 revs/min, and churning time is 15 minutes.
Embodiment 2
By weight, calcium sulphoaluminate 30 parts, tetrasodium ethylenediamine tetraacetate 6 parts, aluminium dihydrogen tripolyphosphate 5 parts, Tutofusin tris 6 parts, palmitinic acid 3 parts, sepiolite fibre 6 parts are mixed.Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.Combination treatment adopts the stirring velocity of 1200 revs/min, and churning time is 15 minutes.
Embodiment 3
By weight, calcium sulphoaluminate 25 parts, tetrasodium ethylenediamine tetraacetate 5 parts, aluminium dihydrogen tripolyphosphate 4 parts, Tutofusin tris 5 parts, palmitinic acid 2 parts, sepiolite fibre 5 parts are mixed.Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.Combination treatment adopts the stirring velocity of 1200 revs/min, and churning time is 15 minutes.
Reference examples 1
Be with the difference of embodiment 3: do not add tetrasodium ethylenediamine tetraacetate.
By weight, calcium sulphoaluminate 25 parts, aluminium dihydrogen tripolyphosphate 4 parts, Tutofusin tris 5 parts, palmitinic acid 2 parts, sepiolite fibre 5 parts are mixed.Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.Combination treatment adopts the stirring velocity of 1200 revs/min, and churning time is 15 minutes.
Reference examples 2
Be with the difference of embodiment 3: do not add aluminium dihydrogen tripolyphosphate.
By weight, calcium sulphoaluminate 25 parts, tetrasodium ethylenediamine tetraacetate 5 parts, Tutofusin tris 5 parts, palmitinic acid 2 parts, sepiolite fibre 5 parts are mixed.Sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.Combination treatment adopts the stirring velocity of 1200 revs/min, and churning time is 15 minutes.
The consumption of described rust inhibitor in cement is 3% of cement weight.Test subject and method are carried out with reference to " antirust for reinforced concrete " (JT/T537-2004) and " sulfuric-resisting salt corrosion sanitas " (JC/T1011-2006), and rust inhibitor volume is 12%.Reinforced steel bar rust preventing and concrete performance affect test-results in table 1; Sulphate-corrosion resistance energy test result is in table 2:
As can be seen from the table, rust inhibitor provided by the invention has good rust-proof effect, particularly embodiment 3 is relative to reference examples 1, add tetrasodium ethylenediamine tetraacetate cathodic area and positive column all precipitable, the dissolving of anode metal can be hindered, oxygen can be hindered again close to negative electrode generation reduction reaction, improve resistance rust effect;
As can be seen from the table; rust inhibitor provided by the invention has good rust-proof effect, and particularly embodiment 3 is relative to reference examples 1, and adding aluminium dihydrogen tripolyphosphate gel conversion can occur in acid condition; form protective membrane at reinforcing bar and concrete surface, improve resistance rust effect.
Claims (7)
1. the preparation method of a Steel Concrete rust inhibitor, it is characterized in that, comprise the steps: by weight, calcium sulphoaluminate 20 ~ 30 parts, tetrasodium ethylenediamine tetraacetate 3 ~ 6 parts, aluminium dihydrogen tripolyphosphate 2 ~ 5 parts, amino alcohol 4 ~ 6 parts, 1 ~ 3 part, tensio-active agent, sepiolite fibre 4 ~ 6 parts are mixed.
2. the preparation method of Steel Concrete rust inhibitor according to claim 1, is characterized in that: described amino alcohol is selected from the mixing of one or more in Tutofusin tris, DEAE diethylaminoethanol or 2-amino-2-methyl-1-propanol.
3. the preparation method of Steel Concrete rust inhibitor according to claim 1, is characterized in that: tensio-active agent is selected from the mixing of one or more in oleic acid, palmitinic acid, sodium oleate, potassium palmitate, oleic acid or trolamine.
4. the preparation method of Steel Concrete rust inhibitor according to claim 1, is characterized in that: sepiolite fibre radial dimension is 40 ~ 50nm, and vertical scale is 1 ~ 5 μm.
5. the preparation method of Steel Concrete rust inhibitor according to claim 1, is characterized in that: described combination treatment adopts the stirring velocity of 800 ~ 1800 revs/min, and churning time is 10 ~ 20 minutes.
6. the application of Steel Concrete rust inhibitor in concrete is antirust that prepare of claim 1.
7. application according to claim 6, is characterized in that: the consumption of described rust inhibitor in cement is 1 ~ 5% of cement weight.
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| CN201510725972.1A CN105152559A (en) | 2015-11-01 | 2015-11-01 | Method for preparing corrosion inhibitor for reinforced concrete |
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| CN201510725972.1A CN105152559A (en) | 2015-11-01 | 2015-11-01 | Method for preparing corrosion inhibitor for reinforced concrete |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329052A (en) * | 2018-02-07 | 2018-07-27 | 湖北文理学院 | A method of processing sea salt sea sand concrete |
| CN116514436A (en) * | 2023-04-28 | 2023-08-01 | 深圳市砼科院有限公司 | Crack resistance reinforcing agent for concrete and preparation method thereof |
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| CN101007717A (en) * | 2007-01-25 | 2007-08-01 | 上海市建筑科学研究院(集团)有限公司 | Reinforced concrete anti-rusting agent |
| 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 |
| CN102295426A (en) * | 2011-09-05 | 2011-12-28 | 甘肃土木工程科学研究院 | Organic composite nano-diameter sepiolite fiber reinforced concrete corrosion inhibitor, and preparation method and application thereof |
| CN103058548A (en) * | 2012-12-26 | 2013-04-24 | 上海浦东路桥建设股份有限公司 | Reinforced concrete rust inhibitor and use method thereof |
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2015
- 2015-11-01 CN CN201510725972.1A patent/CN105152559A/en active Pending
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| US20060096497A1 (en) * | 2003-05-29 | 2006-05-11 | Rhodes Philip S | Corrosion resistant composition for treatment of hardened concrete structures |
| CN101007717A (en) * | 2007-01-25 | 2007-08-01 | 上海市建筑科学研究院(集团)有限公司 | Reinforced concrete anti-rusting agent |
| 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 |
| CN102295426A (en) * | 2011-09-05 | 2011-12-28 | 甘肃土木工程科学研究院 | Organic composite nano-diameter sepiolite fiber reinforced concrete corrosion inhibitor, and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108329052A (en) * | 2018-02-07 | 2018-07-27 | 湖北文理学院 | A method of processing sea salt sea sand concrete |
| CN116514436A (en) * | 2023-04-28 | 2023-08-01 | 深圳市砼科院有限公司 | Crack resistance reinforcing agent for concrete and preparation method thereof |
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Application publication date: 20151216 |