CN114075051A - Reinforcing steel bar rust inhibitor of composite nano particles and preparation method thereof - Google Patents
Reinforcing steel bar rust inhibitor of composite nano particles and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
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- C04B2103/61—Corrosion inhibitors
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Abstract
The invention discloses a reinforcing steel bar rust inhibitor of composite nano particles and a preparation method thereof. The reinforcing steel bar rust inhibitor is formed by mixing a rust inhibiting component, a nano compact component, a stable component and a solvent component; the rust resisting component consists of polyaspartic acid, a cathodic corrosion inhibitor and amino acid, the nano compact component is selected from nano titanium oxide dispersion liquid, nano silicon oxide dispersion liquid and nano aluminum oxide dispersion liquid, and the stable component is selected from sorbitol ester, glyceryl monostearate, pentaerythritol ester and laurate; the solvent component is water. According to the reinforcement corrosion inhibitor, the reinforcement is protected by adopting the polyaspartic acid and the cathode type corrosion inhibitor to cooperate with a strong adsorption effect on the surface of the reinforcement, the nano particles are added to compact the concrete pores, the effective concentration of the corrosion inhibitor in the structure for long-term service is guaranteed, the deactivation time of the concrete reinforcement is effectively delayed, the reinforcement corrosion rate is reduced, and the improvement and guarantee of the durability of the concrete are realized.
Description
Technical Field
The invention belongs to the technical field of steel bar corrosion protection, and particularly relates to a steel bar rust inhibitor of composite nano particles and a preparation method thereof.
Background
The reinforced concrete interface is the most important factor influencing the durability of the marine concrete and is the key for improving the performance of the concrete. The rust inhibitor for various reinforcing steel bars attracts the attention of researchers and engineering technicians at home and abroad due to the characteristics of good rust inhibiting effect, convenient construction process, lower economic cost and the like. However, the characteristics of the complex concrete gelling system, different types of reinforcing steel bars, randomness of reinforcing steel bar corrosion and the like in the maritime work and saline soil areas lead to the variability of the microenvironment of a reinforcing steel bar-concrete interface, and the corrosion inhibitor in a newly-built structure has the dissolution risk, so that stricter requirements are provided for the effectiveness, the long-acting property and the environmental protection performance of the corrosion inhibitor.
Corrosive ions such as chloride ions and sulfate ions enter the concrete from the external environment through the diffusion, capillary and other actions, when the corrosive ions are accumulated to a certain concentration on the surface of the steel bar, the corrosive ions corrode and damage the steel bar, and the generated corrosion products expand to cause concrete cracks, thereby seriously endangering the service safety and durability of the reinforced concrete structure. However, the protection effect of the rust inhibitor in the newly-built structure on the reinforced concrete structure is mostly limited to the protection on the corrosion of the steel bars, and the rust inhibitor internally doped into the concrete has no obvious effect on improving the performance of the concrete, so that the waste is caused to a certain extent, and the rust inhibitor is also a pain point applied by the rust inhibitor.
Based on the long-felt need of excellent environmental protection and good biocompatibility of additive products, amino acid rust inhibitors have become a hot spot of research in recent years, wherein polyaspartic acid is applied to the field of cooling water due to good corrosion inhibition effect thereof, such as patent CN 109607832A; in the field of concrete, patent CN107640924A proposes a rust inhibitor for reinforced concrete and a preparation method thereof, wherein polyaspartic acid and polyacrylamide can react with concrete hydration products to generate gelled substances so as to block the passage of chloride ions diffusing into the concrete. In terms of corrosion inhibition mechanism, polyaspartic acid is used as an anode type corrosion inhibition substance, carboxylate radicals and amide radicals are used as active sites of interaction of polyaspartic acid and the steel surface and are adsorbed on the surface of the steel bar, and a cathode type corrosion inhibitor such as zinc salt is added, so that on one hand, a strong adsorption layer is formed on the surface of the steel bar through complexation reaction of polyaspartic acid and amide radicals, and corrosion of the steel bar is inhibited; on the other hand, the addition of the cathode type corrosion inhibitor can effectively inhibit the hydrogen evolution risk of a steel bar load position in a concrete structure.
The existing patent application CN109437967A introduces a preparation method of nano-silica dense concrete, which improves the compactness of the existing structural concrete by performing electromigration on a nano-silica aqueous solution. Besides the nano particles, the patent CN107365098A and CN108178545A all use pulverized materials such as fly ash and silica fume to improve the compactness of the concrete structure, and the effect is weaker than that of the nano particles. In the current patent application, the rust prevention product that hinders the rust protection with the closely knit protection design of base member together with the reinforcing bar seldom, nevertheless hinder rust and closely knit protection of base member and supplement each other, the closely knit protection of base member can effectively reduce dissolving out of the rust prevention protection component in order to realize hindering the rust long-term, and the demand is extensive and significant in actual engineering.
Disclosure of Invention
The invention provides a reinforcing steel bar rust inhibitor capable of efficiently reducing the corrosion rate of reinforcing steel bars for a long time and a preparation method thereof, aiming at solving the problem of long-term effectiveness of an internally-doped rust inhibitor in improving and guaranteeing the durability of a newly-built reinforced concrete structure and based on a rust inhibition mechanism of the rust inhibitor on the corrosion of the reinforcing steel bars and the compactness of nano particles on concrete.
Based on the synergistic corrosion inhibition effect of polyaspartic acid, phosphate, zinc salt, zincate, higher fatty acid ammonium salt and other cathode type corrosion inhibitors on the steel bars, the invention forms a strong adsorption layer on the surfaces of the steel bars to inhibit corrosion cathode reaction, and has good durability improvement effect on reinforced concrete structures under the severe service environment of load action. And the composite nano particles can isolate corrosion of chloride ions and the like to the maximum extent, so that the corrosion is reduced. The used materials such as polyaspartic acid, amino acid and the like have excellent environmental protection performance and biocompatibility.
The invention provides a reinforcing steel bar rust inhibitor of composite nano particles, which is formed by mixing a rust inhibiting component, a nano dense component, a stable component and a solvent component, wherein the mass percentages of the components are as follows:
the sum of the mass percentages of the components is 100 percent;
the rust-resisting component is prepared by mixing the following components in parts by mass:
10-20 parts of polyaspartic acid,
0.1 to 0.5 portion of cathode type corrosion inhibitor,
4.5-19.9 parts of amino acid;
the cathode type corrosion inhibitor is a mixture consisting of more than one of phosphate, zinc salt, zincate and higher fatty acid ammonium salt in any proportion.
The phosphate is selected from one or more of sodium phosphate, calcium phosphate, sodium dihydrogen phosphate, ammonium dihydrogen phosphate, sodium monohydrogen phosphate, sodium hexametaphosphate, disodium hydrogen phosphate and sodium pyrophosphate; the zinc salt is selected from one or more of zinc nitrate, zinc chloride, zinc sulfate and zinc acetate in any proportion; the zincate is selected from a mixture consisting of any one or more than one of sodium zincate and calcium zincate in any proportion; the higher fatty acid ammonium salt is selected from one or more of ammonium sodium hexadecanoate, ammonium sodium heptadecanoate, ammonium sodium octadecanoate, ammonium sodium eicosanoate, ammonium sodium tetracosanoate, ammonium sodium octadecenoate and ammonium sodium docosahexenoate. These can be used as cathodic corrosion inhibitors.
The amino acid is selected from a mixture consisting of more than one of glycine, alanine, leucine, isoleucine, valine, proline, phenylalanine, methionine, tryptophan, serine, glutamine, threonine, hemisarcosine, asparagine, tyrosine, aspartic acid, lysine, arginine and histidine in any proportion.
The nano dense component is selected from one or more of nano titanium oxide dispersion liquid, nano silicon oxide dispersion liquid and nano aluminum oxide dispersion liquid which are mixed in any proportion;
the nano titanium dioxide dispersion liquid is the dispersion liquid of nano titanium dioxide dispersed in water, the mass fraction of the nano titanium dioxide in the nano titanium dioxide dispersion liquid is 10% -40%, and the particle size range of the nano titanium dioxide is 1-50 nm;
the nano silicon oxide dispersion liquid is a dispersion liquid of nano silicon dioxide dispersed in water, the mass fraction of the nano silicon dioxide in the nano silicon oxide dispersion liquid is 10% -40%, and the particle size range of the nano silicon dioxide is 5-50 nm;
the nano-alumina dispersion liquid is a dispersion liquid of nano-alumina dispersed in water, the mass fraction of the nano-alumina in the nano-alumina dispersion liquid is 10% -40%, and the particle size range of the nano-alumina is 5-40 nm.
The stabilizing component is selected from one or more of sorbitol ester, glyceryl monostearate, pentaerythritol ester and laurate.
The solvent component is water.
The rust-resisting component directly acts on the reinforcing steel bar to inhibit the electrochemical corrosion reaction of the reinforcing steel bar; the nano dense component acts on the concrete matrix to inhibit the rapid transmission of aggressive ions; the stabilizing component stabilizes and disperses the components of the rust inhibitor.
The invention relates to a preparation method of a reinforcing steel bar rust inhibitor of composite nano particles, which comprises the following steps:
(1) heating solvent component water to 45-70 deg.C, adding stable component while stirring, mixing for 0.5-3 hr, adding rust inhibiting component, and stirring at 45-70 deg.C for 3-8 hr to obtain mixed solution;
(2) and (2) adding the nano dense component into the mixed solution obtained in the step (1) according to the ratio of 5ml/min to 30ml/min, and continuously stirring for 2-6h to obtain the reinforcing steel bar rust inhibitor.
The invention has the following beneficial effects:
(1) the steel bar is protected by adopting the strong adsorption effect of the polyaspartic acid and the cathode type corrosion inhibitor on the surface of the steel bar in a synergistic manner, and the cathode type corrosion inhibitor is added to inhibit the hydrogen evolution reaction possibly generated by the steel bar under the load effect;
(2) according to the invention, the nano particles are added to compact the concrete pores, reduce the water absorption of the concrete, increase the flexibility of the corrosive ions reaching the surface of the steel bar, play a role in delaying the ion corrosion in the external environment, effectively reduce the overflow of the rust-resisting component, ensure the effective concentration of the rust inhibitor in the structure for long-term service, effectively delay the deactivation time of the concrete steel bar, reduce the corrosion rate of the steel bar, and realize the improvement and guarantee of the durability of the concrete;
(3) the reinforcing steel bar rust inhibitor is based on reinforcing steel bar corrosion inhibition and a rust inhibiting mechanism of the nano particles for compacting concrete, so that the problem of long-term effectiveness of the internally-doped rust inhibitor in the aspects of improving and guaranteeing the durability of a newly-built reinforced concrete structure is solved;
(4) the raw materials adopted by the invention, such as polyaspartic acid, amino acid and the like, have excellent environmental protection performance and biocompatibility.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples. The present invention includes various alterations and modifications made by those skilled in the art based on the above technical ideas and conventional means, and is intended to be included in the scope of the present invention.
Example 1
The reinforcing steel bar rust inhibitor of the composite nano particles comprises the following components: the mass fraction ratio of the rust-resisting component, the nano dense component, the stable component and the solvent component is 20:5:0.5: 74.5;
the rust-resisting component is prepared from polyaspartic acid, sodium phosphate, calcium zincate, sodium ammonium octadecanoate and amino acid mixture according to the mass ratio of 10: 0.1: 0.05: 0.05: 4.5 mixing;
the amino acid mixture is prepared by mixing aspartic acid, asparaginase, arginine, proline, phenylalanine and the like in a mass ratio;
the nano dense component is nano alumina dispersion liquid, wherein the grain diameter of the nano alumina is 30nm, and the mass fraction is 20%;
the stabilizing component consists of sorbitol ester and pentaerythritol ester, and the mass fraction ratio of the stabilizing component is 1: 1;
the solvent component is water.
The preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating water to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-inhibiting component, and stirring for 3 hours at the temperature of 55 ℃ to obtain a mixed solution;
(2) adding a nano dense component into the mixed solution obtained in the step (1) according to a ratio of 5ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; the rust inhibitor was designated as A.
Example 2
The reinforcing steel bar rust inhibitor of the composite nano particles comprises the following components: the mass fraction ratio of the rust-resisting component, the nano dense component, the stable component and the solvent component is 20:10:1: 69;
the rust-resisting component comprises polyaspartic acid, sodium monohydrogen phosphate, zinc nitrate, sodium zincate, serine, lysine and arginine according to the mass ratio: 13.6: 0.05: 0.05: 0.1: 2: 2: 2, mixing;
the nano dense component is nano silicon oxide dispersion liquid, wherein the particle size of nano silicon dioxide is 50nm, and the mass fraction is 25%;
the stabilizing component is a mixture of glyceryl monostearate and laurate, and the mass fraction ratio of the stabilizing component is 2: 1;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating water to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-inhibiting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain a mixed solution;
(2) adding a nano dense component into the mixed solution obtained in the step (1) according to the volume of 15ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; this rust inhibitor was designated as B.
Example 3
The reinforcing steel bar rust inhibitor of the composite nano particles comprises the following components: the mass fraction ratio of the rust-resisting component, the nano dense component, the stable component and the solvent component is 30:5:0.5: 64.5;
the rust-resisting component is a mixture of polyaspartic acid, ammonium dihydrogen phosphate, zinc sulfate and amino acid in a mass ratio of 20: 0.25: 0.25: 9.5 mixing;
the amino acid mixture is prepared by mixing glycine, alanine, leucine, isoleucine and histidine according to the mass fraction ratio of 1: 1: 1: 1: 1: 1 are mixed.
The nano dense component is nano silicon oxide dispersion liquid, wherein the particle size of nano silicon dioxide is 50nm, and the mass fraction is 25%;
the stabilizing component is glyceryl monostearate;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating the solvent to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-inhibiting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain a mixed solution;
(2) adding a nano dense component into the mixed solution obtained in the step (1) according to the volume of 30ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; this rust inhibitor was designated as C.
Example 4
The reinforcing steel bar rust inhibitor of the composite nano particles comprises the following components: the mass fraction ratio of the rust-resisting component, the nano dense component, the stable component and the solvent component is 30:5:0.5: 64.5;
the rust-resisting component is prepared from polyaspartic acid, pyrohexametaphosphate, sodium pyrophosphate, sodium ammonium octadecenoate and an amino acid mixture in a mass ratio of 20: 0.1: 0.3: 0.1: 9.5 mixing;
the amino acid mixture is prepared by mixing methionine, tryptophan, serine, glutamine, threonine and hemisarcosine in equal proportion.
The nano dense component is a mixture of nano silicon oxide dispersion liquid and nano titanium oxide dispersion liquid, and the mass fraction ratio of the nano dense component to the nano titanium oxide dispersion liquid is 2: 1; wherein the particle size of the nano silicon dioxide in the nano silicon oxide dispersion liquid is 50nm, and the mass fraction is 25%; the particle size of the nano titanium dioxide in the nano titanium oxide dispersion liquid is 40nm, and the mass fraction is 20%;
the stabilizing component is a sorbitol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating the solvent to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-inhibiting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain a mixed solution;
(2) mixing the nano silicon oxide dispersion liquid and the nano titanium oxide dispersion liquid in proportion while stirring for 1h to obtain a nano dense component;
(3) adding the nano dense component obtained in the step (2) into the mixed solution obtained in the step (1) according to 5ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; this rust inhibitor was designated as D.
Example 5
The reinforcing steel bar rust inhibitor of the composite nano particles comprises the following components: the mass fraction ratio of the rust-resisting component, the nano dense component, the stable component and the solvent component is 25:10:0.5: 64.5;
the rust-resisting component comprises polyaspartic acid, disodium hydrogen phosphate, sodium ammonium docosahexaenoic acid and an amino acid mixture in a mass ratio of: 20: 0.2: 0.3: 9.5 mixing;
the amino acid mixture is prepared by mixing the components of the arginine, the proline, the phenylalanine, the methionine and the like in a mass ratio.
The nano dense component is nano titanium oxide dispersion liquid, wherein the particle size of nano titanium dioxide is 40nm, and the mass fraction is 20%;
the stabilizing component is pentaerythritol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating the solvent to 45 ℃, adding the stable components while stirring, fully mixing for 0.5 hour, then sequentially adding the rust-resisting components, and stirring for 3 hours at the temperature of 45 ℃ to obtain a mixed solution;
(2) adding a nano dense component into the mixed solution obtained in the step (1) according to 25ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; this rust inhibitor was designated as E.
Comparative example 1 is baseline (blank).
Comparative example 2:
the formula of the rust inhibitor is as follows: 1 part of alanine, 1 part of aspartic acid, 1 part of tyrosine, 1 part of glutaraldehyde, 1 part of zinc hydrogen phosphate, 1 part of phosphoric acid, 1 part of urotropine, 0.1 part of thiourea, 1 part of aniline, 1 part of ethanol and 2 parts of water are mixed in sequence according to the mass part; this rust inhibitor was designated as F.
Comparative example 3:
a steel bar rust inhibitor comprises the following components: the mass fraction ratio of the nano compact component, the stable component and the solvent component is 35:0.5: 64.5;
the nano dense component is a mixture of nano silicon oxide dispersion liquid and nano titanium oxide dispersion liquid, and the mass fraction ratio of the nano dense component to the nano titanium oxide dispersion liquid is 2: 1. wherein the particle size of the nano silicon dioxide in the nano silicon oxide dispersion liquid is 50nm, and the mass fraction is 25%; the particle size of the nano titanium dioxide in the nano titanium oxide dispersion liquid is 40nm, and the mass fraction is 20%;
the stabilizing component is a sorbitol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps:
(1) heating the solvent to 45 ℃, adding the stable components while stirring, and mixing for 0.5 hour to obtain a mixed solution;
(2) adding a nano dense component into the mixed solution obtained in the step (1) according to 20ml/min, and continuously stirring for 2 hours to obtain the reinforcing steel bar rust inhibitor; this rust inhibitor was designated as G.
Comparative example 4:
a steel bar rust inhibitor comprises the following components: the mass fraction ratio of the rust-resisting component, the stabilizing component and the solvent component is 35:0.5: 64.5;
the rust-resisting component is prepared from polyaspartic acid, sodium phosphate, zinc nitrate and aspartic acid in a mass fraction ratio of 20: 0.25: 0.25: 9.5 mixing;
the stabilizing component is a sorbitol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps: heating water to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-resisting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain the steel bar rust inhibitor; this rust inhibitor was designated as H.
Comparative example 5:
a steel bar rust inhibitor comprises the following components: the mass fraction ratio of the rust-resisting component, the stabilizing component and the solvent component is 35:0.5: 64.5;
the rust-resisting component is prepared from polyaspartic acid and aspartic acid in a mass fraction ratio of 20: 10;
the stabilizing component is a sorbitol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps: heating water to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-resisting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain the steel bar rust inhibitor; the rust inhibitor was designated as I.
Comparative example 6:
a steel bar rust inhibitor comprises the following components: the mass fraction ratio of the rust-resisting component, the stabilizing component and the solvent component is 35:0.5: 64.5;
the rust-resisting component is prepared from zinc nitrate and aspartic acid in a mass fraction ratio of 20:10, mixing the components;
the stabilizing component is a sorbitol ester;
the solvent component is water;
the preparation method of the steel bar rust inhibitor comprises the following steps: heating water to 45 ℃, adding the stable component while stirring, fully mixing for 0.5 hour, then adding the rust-resisting component, and stirring for 3 hours at the temperature of 45 ℃ to obtain the steel bar rust inhibitor; this rust inhibitor was designated as J.
Application examples
The rust inhibitors prepared in the examples and the comparative examples were added to freshly mixed concrete in the same amount, and the concrete mixing ratios are shown in table 1. Reinforcing steel bars are pre-embedded in concrete, a chloride ion dry-wet cycle corrosion experiment is carried out after maintenance, the concrete is split after the experiment is finished, the reinforcing steel bars are taken out, the corrosion area of the reinforcing steel bars in the concrete is measured and calculated, and the result is shown in table 2.
TABLE 1 Dry and Wet cycle test mix ratio (Kg/m) of reinforced concrete3)
| No. | Reference waterMud | Sand | Big stone | Small stone | Water (W) | Rust inhibitor |
| Datum | 360 | 762 | 686 | 453 | 180 | 0 |
| Rust inhibitor | 360 | 762 | 686 | 453 | 178.5 | 1.5 |
TABLE 2 area percentage of corrosion in steel bars incorporating corrosion inhibitors of examples and comparative examples
As can be seen from Table 2, when the dry-wet cycle lasts for 2 months, the corrosion area percentage of the steel bars in the standard concrete is 16.35%, the corrosion area percentage/% of the steel bars of the concrete added with the rust inhibitor of the comparative example is as high as 4.78% -9.90%, while the corrosion area percentage value of the steel bars of the rust inhibitor prepared by the embodiment of the invention is below 2.11%, and the rust inhibition effect is excellent; the rust inhibitor prepared in the example still has a remarkable corrosion inhibition effect when the dry and wet cycle reaches 24 months.
The rust inhibitors prepared in the examples and the comparative examples were blended into fresh concrete, and after 28 days of curing, a concrete water penetration height test was performed to compare the compactness, and the test results are shown in table 3.
TABLE 3 concrete Permeability heights incorporating different Rust inhibitors
As can be seen from Table 3, when the rust inhibitor prepared by the embodiments of the invention is doped, the water penetration height of the concrete is 5-10mm, the compactness is good, and the erosion resistance is excellent; when the rust inhibitor F and the rust inhibitor H which are not added with dense components in the comparative example are mixed, the water seepage height of the concrete is respectively 60 mm and 58mm, and the compactness is poor.
Claims (8)
1. The reinforcing steel bar rust inhibitor with the composite nano particles is characterized by being formed by mixing a rust inhibiting component, a nano dense component, a stable component and a solvent component, wherein the mass percentages of the components are as follows:
the sum of the mass percentages of the components is 100 percent;
the rust-resisting component is prepared by mixing the following components in parts by mass:
10-20 parts of polyaspartic acid,
0.1 to 0.5 portion of cathode type corrosion inhibitor,
4.5-19.9 parts of amino acid;
the cathode type corrosion inhibitor is a mixture consisting of more than one of phosphate, zinc salt, zincate and higher fatty acid ammonium salt in any proportion;
the nano dense component is selected from one or more of nano titanium oxide dispersion liquid, nano silicon oxide dispersion liquid and nano aluminum oxide dispersion liquid which are mixed in any proportion;
the nano titanium dioxide dispersion liquid is the dispersion liquid of nano titanium dioxide dispersed in water, and the mass fraction of the nano titanium dioxide in the nano titanium dioxide dispersion liquid is 10-40%; the nano silicon oxide dispersion liquid is a dispersion liquid of nano silicon dioxide dispersed in water, and the mass fraction of the nano silicon dioxide in the nano silicon oxide dispersion liquid is 10-40%; the nano-alumina dispersion liquid is a dispersion liquid of nano-alumina dispersed in water, and the mass fraction of the nano-alumina in the nano-alumina dispersion liquid is 10-40%;
the stabilizing component is selected from one or more of sorbitol ester, glyceryl monostearate, pentaerythritol ester and laurate;
the solvent component is water.
2. The reinforcing steel bar rust inhibitor with composite nano particles as claimed in claim 1, wherein the phosphate is selected from the group consisting of sodium phosphate, calcium phosphate, sodium dihydrogen phosphate, ammonium dihydrogen phosphate, sodium monohydrogen phosphate, sodium pyrohexametaphosphate, disodium hydrogen phosphate and sodium pyrophosphate.
3. The reinforcing steel bar rust inhibitor with composite nano particles as claimed in claim 1, wherein the zinc salt is selected from one or more of zinc nitrate, zinc chloride, zinc sulfate and zinc acetate.
4. The reinforcing steel bar rust inhibitor with composite nano particles as claimed in claim 1, wherein the zincate is selected from a mixture consisting of sodium zincate and calcium zincate in any ratio.
5. The reinforcing bar rust inhibitor with composite nanoparticles as claimed in claim 1, wherein the higher fatty acid ammonium salt is selected from one or more of ammonium sodium hexadecanoate, ammonium sodium heptadecanoate, ammonium sodium octadecanoate, ammonium sodium eicosanoate, ammonium sodium tetracosanoate, ammonium sodium octadecenoate and ammonium sodium docosahexanoate.
6. The reinforcing bar rust inhibitor with composite nano particles as claimed in claim 1, wherein the amino acid is selected from a mixture consisting of more than one of glycine, alanine, leucine, isoleucine, valine, proline, phenylalanine, methionine, tryptophan, serine, glutamine, threonine, hemisarcosine, asparagine, tyrosine, aspartic acid, lysine, arginine and histidine in any proportion.
7. The reinforcing steel bar rust inhibitor with composite nanoparticles as claimed in claim 1, wherein the nano titanium dioxide in the nano titanium oxide dispersion has a particle size in the range of 1-50 nm; the particle size range of the nano silicon dioxide in the nano silicon oxide dispersion liquid is 5-50 nm; the grain diameter range of the nano aluminum oxide in the nano aluminum oxide dispersion liquid is 5-40 nm.
8. The preparation method of the reinforcing steel bar rust inhibitor with the composite nano particles as claimed in any one of claims 1 to 7, which is characterized by comprising the following steps:
(1) heating solvent component water to 45-70 deg.C, adding stable component while stirring, mixing for 0.5-3 hr, adding rust inhibiting component, and stirring at 45-70 deg.C for 3-8 hr to obtain mixed solution;
(2) and (2) adding the nano dense component into the mixed solution obtained in the step (1) according to the ratio of 5ml/min to 30ml/min, and continuously stirring for 2-6h to obtain the reinforcing steel bar rust inhibitor.
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| US6022401A (en) * | 1996-07-16 | 2000-02-08 | Nalco Chemical Company | Biodegradable modified polyaspartic polymers for corrosion and scale control |
| CN101613543A (en) * | 2009-07-20 | 2009-12-30 | 北京科技大学 | A kind of preparation method with coating of metal surface corrosion inhibition and self-repair function |
| CN107629777A (en) * | 2017-10-20 | 2018-01-26 | 中国石油大学(北京) | A kind of composite corrosion inhibitor for suppressing corrosion and its preparation method and application |
| CN110123651A (en) * | 2019-06-10 | 2019-08-16 | 天津先光化妆品有限公司 | A kind of water-soluble titanium dioxide dispersion pulp |
| CN110862811A (en) * | 2019-12-03 | 2020-03-06 | 河南省科学院同位素研究所有限责任公司 | Compound low-phosphorus corrosion inhibitor suitable for oil field system and preparation method thereof |
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