CN112125565A - Concrete corrosion and rust inhibitor and preparation method thereof - Google Patents
Concrete corrosion and rust inhibitor and preparation method thereof Download PDFInfo
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
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Abstract
The invention discloses a concrete corrosion and rust inhibitor which comprises the following components in parts by weight: 5-15 parts of 4-aminocyclopentacarboxylic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of allicin and 1-4 parts of water reducing agent. The components of the invention cooperate with each other: 5-15 parts of aminocyclopentacarboxylic acid, 30-50 parts of amide and 10-20 parts of sodium monofluorophosphate form a complex, the complex migrates to the surface of the steel bar to form a layer of compact passivation film to isolate corrosion of chloride ions, the complex continuously migrates to the surface of the steel bar during the service period of concrete, the passivation film on the surface of the steel bar is continuously supplemented, and the long-term continuous rust resistance effect is achieved; meanwhile, other components are added, so that the sulfate and chloride ion corrosion resistance of the concrete is obviously improved, the impermeability grade is improved to P12-P15, and all performance indexes are integrated.
Description
Technical Field
The invention relates to the technical field of materials, in particular to a concrete corrosion and rust inhibitor and a preparation method thereof.
Background
Coastal ports, salt fields and salinized soil areas usually contain a large amount of sulfate and chloride, and chloride ions destroy a passivation film formed on the surface of a steel bar in a high-alkalinity environment, so that the corrosion on the surface of the steel bar has a severe corrosion effect on concrete and the steel bar; excessive sulfate ions continue to react with cement hydration products to generate calcium sulphoaluminate, which contains a large amount of crystal water and expands by more than 1.5 times in volume to cause cracking damage of a concrete structure; under the long-term erosion of chloride ions and sulfate ions, the concrete structure often cannot reach the expected service life, and the economic loss caused by the durability problem of the reinforced concrete structure is immeasurable. The steel bar rust inhibitor is an additive which is added into concrete to resist the corrosion of sulfate to the concrete and inhibit the corrosion of chloride ions to steel bars.
The existing corrosion-resistant rust inhibitor which is applied more is nitrite, chromate, molybdate and the like, and has the characteristics of high doping amount, toxicity, almost no protection effect on sulfate ion corrosion, obvious reduction of the rust inhibition effect after the concentration of the rust inhibition component is reduced, and certain adverse effect on the performance of concrete.
The publication number is 'CN 108373287A', the name is 'a concrete rust inhibitor', and the concrete rust inhibitor comprises the following components in parts by weight: sodium molybdate: 25-60 parts; sodium hexametaphosphate: 15-46 parts; sodium abietate: 3-17 parts; sodium gluconate: 10-28 parts; fly ash: 40-80 parts; and, water: 280 to 540 parts. The concrete corrosion inhibitor provided by the invention has good corrosion inhibition and corrosion resistance, is environment-friendly, has good water reducing, retarding and air entraining performances, and can be applied to severe environments with high chloride ion concentration, alternation of dryness and humidity, severe cold and the like. However, the concrete corrosion inhibitor has insufficient protection against the corrosion of sulfate ions.
Therefore, how to prepare the concrete corrosion and rust inhibitor has corrosion and rust inhibiting functions, and has good and long-term protective performance on corrosion of chloride ions and sulfate ions, which becomes a technical problem in the field.
Disclosure of Invention
The invention aims to provide a concrete corrosion and rust inhibitor which has corrosion and rust inhibiting functions and has good and long-term protective performance on corrosion of chloride ions and sulfate ions.
In order to achieve the purpose, the invention provides a concrete corrosion and rust inhibitor which comprises the following components in parts by weight: 5-15 parts of 4-aminocyclopentacarboxylic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of allicin and 1-4 parts of water reducing agent.
Further, the concrete corrosion and rust inhibitor comprises the following components in parts by weight: 10 parts of 4-aminocyclohexane carboxylic acid, 40 parts of amide, 10 parts of sodium monofluorophosphate, 5 parts of alkyl polyether sulfonate, 35 parts of silica fume, 3 parts of benzotriazole, 2 parts of allicin and 2 parts of water reducing agent.
Further, the 4-aminocyclohexanecarboxylic acid is trans-4-aminocyclohexanecarboxylic acid.
Further, the preparation method of the amide comprises the following steps: 180-190 parts of dihexylamine, 150-160 parts of dipentylamine, 140-150 parts of 2-ethylhexanoic acid, 125-135 parts of 5-methylhexanoic acid and 390-410 parts of water in parts by weight are stirred at normal temperature for reaction, and the amide is obtained after suction filtration and drying.
Further, the sodium monofluorophosphate is food grade.
Further, the alkyl polyether sulfonate is at least one of alkyl alcohol polyoxyethylene ether sodium sulfonate and alkyl polyoxyethylene ether potassium sulfonate.
Further, the specific surface area of the silica fume is more than or equal to 20m2The ratio of the particle diameter of the silica fume smaller than 1 μm is more than 99%.
Further, the benzotriazole is water-soluble benzotriazole.
Further, the main components of the allicin are diallyl disulfide and diallyl trisulfide.
Further, the water reducing agent is a powdery polycarboxylate water reducing agent, and the water reducing rate of the water reducing agent is more than 26%.
The invention also provides a preparation method of the concrete corrosion and rust inhibitor, which comprises the following steps: obtaining an amide;
5-15 parts of 4-aminocyclopentane carboxylic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of allicin and 1-4 parts of water reducing agent are mixed and stirred uniformly to obtain the concrete corrosion and rust inhibitor.
Further, the obtaining of the amide comprises:
the method comprises the following steps of stirring 180-190 parts by weight of dihexylamine, 150-160 parts by weight of dipentylamine, 140-150 parts by weight of 2-ethylhexanoic acid, 125-135 parts by weight of 5-methylhexanoic acid and 390-410 parts by weight of water for reaction, and drying to obtain the amide.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:
the invention provides a concrete corrosion and rust inhibitor which comprises the following components in a synergistic manner: 5-15 parts of amino-cyclo-hexanecarboxylic acid, 30-50 parts of amide and 10-20 parts of sodium monofluorophosphate, wherein the three components migrate to the surface of the steel bar through pores in the concrete, and functional groups (-NR) in the three components2-COOH and PO3F-) The corrosion inhibitor and Fe form five-membered or six-membered chelate rings under the chelation effect, the five-membered or six-membered chelate rings are adsorbed on the surface of the steel bar to form a layer of compact passive film, the corrosion of a corrosion medium is isolated, the rust inhibiting components continuously migrate to the surface of the steel bar during the service period of concrete, the passive film on the surface of the steel bar is continuously supplemented, and the long-term continuous rust inhibiting effect is achieved; the silica fume is filled in the particle gaps of other components in the fresh concrete, so that the porosity of the concrete is reduced, the communication rate of continuous pores in the concrete is reduced, erosion pore canals of chloride ions and sulfate ions are blocked, and the chloride ions and the sulfate ions are effectively prevented from entering the interior of the concrete to damage a concrete structure and corrode a reinforcing steel bar; the alkyl polyether sulfonate can eliminate air bubbles in fresh concrete, reduce the generation of pores, reduce the porosity of the internal structure of the concrete and improve the compactness, strength and durability of the concrete; benzotriazole is used as a corrosion inhibitor, a reaction group on the benzotriazole molecule interacts with metal ions generated in the corrosion process to form a precipitation film or an insoluble matching film, and the precipitation film is further polymerized on the metal surface to form a precipitation protective film, so that the corrosion process is prevented; the allicin can effectively inhibit the breeding and reproduction of bacteria and microorganisms on the surface and shallow layer of the concrete, and the product after the allicin is further decomposed has more stable property, thereby having long-term bactericidal effect. The finally obtained concrete corrosion and rust inhibitor has corrosion and rust resistance functions, and has good and long-term protective performance on corrosion of chloride ions and sulfate ions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a preparation method of the corrosion and rust inhibitor for concrete provided by the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be obtained by an existing method.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
according to a typical embodiment of the invention, a concrete corrosion and rust inhibitor is provided, which comprises the following components in parts by weight: 5-15 parts of 4-aminocyclopentacarboxylic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of allicin and 1-4 parts of water reducing agent.
The reasons for 5-15 parts of 4-amino-cyclo-hexanecarboxylic acid, 30-50 parts of amide and 10-20 parts of sodium monofluorophosphate are as follows: the applicant finds that when 5-15 parts of amino-ring hexacarboxylic acid, 30-50 parts of amide and 10-20 parts of sodium monofluorophosphate migrate to the surface of a steel bar through pores in concrete, N, O, P of a polar group in the three components has unshared electron pairs, an empty d orbit exists on the surface of Fe, the lone electron pair N, O, P interacts with the empty d orbit of Fe to form a coordinate bond, a five-membered or six-membered chelate ring is formed and adsorbed on the surface of the steel bar to form a compact passive film, corrosion of a corrosion medium is isolated, and during service of the concrete, the rust-resisting component continuously migrates to the surface of the steel bar, the passive film on the surface of the steel bar is continuously supplemented, and a long-lasting rust-resisting effect is achieved. -COOH in the rust inhibitor and Ca in the concrete pore liquid2+Conversion of reaction to insolubilityThe formed precipitate can prevent the migration of corrosive ions to the surface of the steel bar on one hand, and can increase the resistivity of the concrete and the surface of the steel bar on the other hand so as to reduce the corrosion rate; PO in the rust-inhibiting component3F-Reacting with calcium-containing compounds in concrete to form insoluble apatite Ca5(PO4)3F, covering the surface of the steel bar to prevent oxygen from entering, inhibiting the occurrence of cathode reaction and preventing the steel bar from being damaged by corrosive media; -NR in Rust-inhibiting composition2The group, N adsorbs on the reinforcing bar surface, and R forms the steric hindrance effect outside the reinforcing bar, hinders the erosion medium to reinforcing bar surface infiltration, prevents the reinforcing bar corrosion.
3-8 parts of alkyl polyether sulfonate: the alkyl polyether sulfonate can eliminate air bubbles in fresh concrete, reduce the generation of pores, reduce the porosity of the internal structure of the concrete and improve the compactness, strength and durability of the concrete. The air bubbles in the fresh concrete cannot be completely eliminated by adding too little air bubbles, the strength and the durability of the concrete are influenced, and the performance improvement such as the strength of the added excessive concrete is not obvious.
30-40 parts of silica fume: the specific surface area of silica fume is more than 20m2The concrete admixture is filled in gaps of cement and other admixture particles in fresh concrete, so that the porosity of the concrete is reduced, the communication rate of continuous pores in the concrete is reduced, erosion pore passages of chloride ions and sulfate ions are blocked, and the chloride ions and the sulfate ions are effectively prevented from entering the concrete to damage a concrete structure and corrode a reinforcing steel bar. Too little addition can not completely block the communication rate of continuous pores in the concrete, and too much addition can obviously increase the viscosity of the concrete and increase the water consumption of the concrete.
2-6 parts of benzotriazole: the reaction group on the benzotriazole molecule interacts with metal ions generated in the corrosion process to form a precipitation film or an insoluble matching film, and the precipitation protective film is further polymerized on the metal surface, so that the corrosion process is prevented. The benzotriazole has unique and excellent corrosion inhibition performance on copper or copper alloy. The corrosion-resistant protection mechanism is as follows: in the solution of benzotriazole, copper substitutes hydrogen atoms in NH functional groups of one benzotriazole molecule at a solid-liquid interface, is connected by covalent bonds and is connected with free electrons of nitrogen atoms in another benzotriazole molecule by coordination bonds to form a semi-permeable polymerization complex (the reaction mechanism is shown as formula I), and the polymerization complex film is stable and insoluble in a plurality of solvents and has good corrosion-resistant protection effect. Too little reinforcing bar surface protection film intensity is not enough, and too much rust resistance effect promotes not obvious.
1-3 parts of allicin; the allicin can effectively inhibit breeding and propagation of bacteria and microorganisms on the surface and shallow layer of the concrete, and the product after the allicin is further decomposed has more stable property, thereby playing a long-term bactericidal effect. Too little to have the sterilization effect; too much concrete increases too slowly in later strength.
1-4 parts of a water reducing agent: the mass part of the water reducing agent influences the required water consumption during the mixing of the concrete and the hydration hardening time of the concrete. When the water reducing agent is 1-4 parts, the retarding and water reducing performances of the concrete rust inhibitor are better, too little water reducing performance can be reduced, too long concrete retarding time is achieved, and early strength is reduced.
Therefore, the concrete corrosion and rust inhibitor provided by the invention has the synergistic effect of the components, so that the concrete corrosion and rust inhibitor has the corrosion prevention and rust inhibition functions, and has good and long-term protection performance on the corrosion of chloride ions and sulfate ions.
Preferably, the concrete corrosion and rust inhibitor comprises the following components in parts by weight: 10 parts of 4-aminocyclohexane carboxylic acid, 40 parts of amide, 10 parts of sodium monofluorophosphate, 5 parts of alkyl polyether sulfonate, 35 parts of silica fume, 3 parts of benzotriazole, 2 parts of allicin and 2 parts of water reducing agent. The formula of the component is the optimal formula, so that the functions of corrosion prevention and rust resistance are optimal, and the corrosion effect on chloride ions and sulfate ions is optimal.
Preferably, the 4-aminocyclohexanecarboxylic acid is trans-4-aminocyclohexanecarboxylic acid. The 4-aminocyclohexanecarboxylic acid comprises cis-4-aminocyclohexanecarboxylic acid and trans-4-aminocyclohexanecarboxylic acid, and the inventor of the application finds that the trans-4-aminocyclohexanecarboxylic acid is more favorable for forming the complex, and the complex migrates to the surface of the reinforcing steel bar to form a dense passivation film.
Preferably, the preparation method of the amide comprises the following steps: 180-190 parts of dihexylamine, 150-160 parts of dipentylamine, 140-150 parts of 2-ethylhexanoic acid, 125-135 parts of 5-methylhexanoic acid and 390-410 parts of water in parts by weight are stirred at normal temperature for reaction, and the amide is obtained after vacuum filtration and drying. The amide formation reaction is represented by the formula:
R1COOH+HN(R2)2→R1CON(R2)2+H2o formula (II)
In the formula: r1Is (CH)3CH2)(CH3CH2CH2CH2) CH-or (CH)3)2CH(CH2)3－；
R2Is CH3(CH2)5-or CH3(CH2)4－
-NR of conventional amide rust inhibitors2or-NHR group, R is mostly methyl, ethyl and propyl with 1 to 3C atoms, and when the R is adsorbed on the surface of the steel bar, the hydrophobicity of the R group is insufficient, and the steric hindrance effect is poor; experiments show that when the C atom number in R is 5-6 (hexyl or pentyl), the hydrophobicity and the steric hindrance effect are obviously improved, and the rust resistance is obviously improved, and when the C atom number in R is more than 6, the hydrophobicity and the steric hindrance effect are better, but the migration capability of the C atom number in concrete pores is obviously reduced, and the C atom number cannot be effectively migrated to the surface of a steel bar.
Preferably, the sodium monofluorophosphate is food grade. Preferably, the alkyl polyether sulfonate is at least one of sodium alkyl polyoxyethylene ether sulfonate and potassium alkyl polyoxyethylene ether sulfonate.
Preferably, the specific surface area of the silica fume is more than or equal to 20m2The ratio of the particle diameter of the silica fume smaller than 1 μm is more than 99%. The arrangement is more favorable for filling silica fume in the gaps of particles of other components in the fresh concrete and reducingThe porosity of the concrete is reduced, the communication rate of continuous pores in the concrete is reduced, erosion pore canals of chloride ions and sulfate ions are blocked, and the chloride ions and the sulfate ions are effectively prevented from entering the concrete to damage a concrete structure and corrode a steel bar
Preferably, the benzotriazole is water-soluble benzotriazole. The water-soluble benzotriazole is BTA for short, is an improved product of the benzotriazole, has good corrosion inhibition effect, can be quickly dissolved with water in any proportion, can be used for corrosion prevention of a water system with copper or a copper-iron coexisting material and has synergistic effect when being used in combination with other corrosion inhibitors, so that the corrosion inhibition effect is improved.
Preferably, the main components of the allicin are diallyl disulfide and diallyl trisulfide. The allicin can effectively inhibit the breeding and reproduction of bacteria and microorganisms on the surface and shallow layer of the concrete, and the product after the allicin is further decomposed has more stable property, thereby having long-term bactericidal effect.
Preferably, the water reducing agent is a powdery polycarboxylate water reducing agent, and the water reducing rate of the water reducing agent is more than 26%. The polycarboxylate superplasticizer is a high-performance water reducing agent, is a cement dispersing agent in the application of cement concrete, is green and environment-friendly, and is not flammable and explosive.
According to another exemplary embodiment of the present invention, there is provided a method for preparing the corrosion and rust inhibitor for concrete, as shown in fig. 1, the method including:
s1, obtaining amide;
s2, mixing 5-15 parts by weight of 4-aminocyclopentanoic acid, 30-50 parts by weight of amide, 10-20 parts by weight of sodium monofluorophosphate, 3-8 parts by weight of alkyl polyether sulfonate, 30-40 parts by weight of silica fume, 2-6 parts by weight of benzotriazole, 1-3 parts by weight of allicin and 1-4 parts by weight of water reducing agent, and then uniformly stirring to obtain the concrete corrosion and rust inhibitor.
As an alternative embodiment, the obtaining of the amide comprises:
the method comprises the following steps of stirring 180-190 parts by weight of dihexylamine, 150-160 parts by weight of dipentylamine, 140-150 parts by weight of 2-ethylhexanoic acid, 125-135 parts by weight of 5-methylhexanoic acid and 390-410 parts by weight of water for reaction, and drying to obtain the amide. Experiments show that when the C atom number in R is 5-6 (hexyl or amyl), the hydrophobicity and the steric hindrance effect are obviously improved, and the rust resistance is obviously improved.
The concrete corrosion and rust inhibitor of the present application will be described in detail with reference to examples, comparative examples and experimental data.
Each example and each comparative example were prepared using the components in the parts by weight shown in Table 1.
TABLE 1
The products obtained from each group are directly added into concrete in powder form, the mixing amount is 3 percent of the mass of the cementing material, the corrosion resistance and rust resistance of the products are detected according to a specified method, and the results are shown in table 2.
TABLE 2-product anticorrosion and rust inhibiting property test
From the data in table 2, it can be seen that:
sulfate erosion factor ratio: the standard test piece with the age of 28d is firstly soaked in a 5% Na2SO4 solution for 15h, then is dried at the high temperature of 80 +/-5 ℃ for 6h, is subjected to a cycle test, is subjected to specified dry-wet cycle times, is used for measuring the compressive strength of concrete subjected to sulfate erosion, and is calculated to obtain the ratio of the compressive strength of a comparison group to that of a blank group, wherein the larger the ratio is, the better the sulfate erosion resistance is.
Permeability coefficient of chloride ion ratio: the ratio of the penetration depth of the chloride ions is obtained by a standard test of 28 d-age of the comparison group and the blank group according to a standard test method, and the smaller the ratio, the better the resistance to corrosion of the chloride ions.
And (3) anti-permeability grade: the standard test piece with the age of 28d is determined according to the maximum water pressure which can be born when the test is carried out according to a standard test method. The impermeability grade of concrete is divided into five grades of P4, P6, P8, P10, P12, etc., which respectively represent resistance to hydrostatic pressures of 0.4, 0.6, 0.8, 1.0 and 1.2MPa without water penetration.
In the comparative example 1, trans-4-aminocyclopropanecarboxylic acid is not added, and the rest is the same as the example 1, so that the defects of reduced corrosion effect of sulfate and chloride ions and corrosion of reinforcing steel bars exist;
in comparative example 2, trans-4-aminocyclohexanoic acid is only 2 parts by weight, and the rest is the same as example 1, so that the defects of reduced sulfate and chloride ion corrosion resistance effect and steel bar corrosion exist;
in comparative example 3, 20 parts by weight of trans-4-aminocycloparboxylic acid and the rest of the same contents as in example 1 had the disadvantages of reduced sulfate and chloride attack resistance and excessively long coagulation time;
in comparative example 4, the same as example 1 except that the amide was not added, there was a disadvantage that the corrosion resistance effect against sulfate and chloride ions was lowered;
in the comparative example 5, the weight part of the amide is changed into 20 parts, and the rest is the same as that of the example 1, so that the defect of reducing the corrosion effect of the sulfate and the chloride ions exists;
in comparative example 6, the weight part of amide was changed to 60 parts, and the rest was the same as in example 1, which had the disadvantage of reduced rust inhibitive effect;
in comparative example 7, sodium monofluorophosphate was not added, and the other examples were the same as in example 1, and the rust inhibitive effect was reduced;
in comparative example 8, the weight part of sodium monofluorophosphate was changed to 5 parts, and the rest of the composition was the same as that in example 1, which has the defect of reduced impermeability strength;
in comparative example 9, the weight portion of sodium monofluorophosphate was changed to 30 portions, and the rest of the solution was the same as that in example 1, which has the defect of excessively long retardation time;
in examples 1-7 of the invention, the sulfate and chloride ion corrosion resistance of the concrete is obviously improved, the impermeability grade is improved to P12-P15, all performance indexes are integrated, and the best effect is obtained in example 1, which is an optimal formula.
In summary, the concrete corrosion and rust inhibitor provided by the invention has synergistic cooperation of the components, specifically: 5-15 parts of amino-cyclo-hexanecarboxylic acid, 30-50 parts of amide and 10-20 parts of sodium monofluorophosphate, wherein the three components migrate to the surface of the steel bar through pores in the concrete, and functional groups (-NR) in the three components2-COOH and PO3F-) The corrosion inhibitor and Fe form five-membered or six-membered chelate rings under the chelation effect, the five-membered or six-membered chelate rings are adsorbed on the surface of the steel bar to form a layer of compact passive film, the corrosion of a corrosion medium is isolated, the rust inhibiting components continuously migrate to the surface of the steel bar during the service period of concrete, the passive film on the surface of the steel bar is continuously supplemented, and the long-term continuous rust inhibiting effect is achieved; meanwhile, other components are added, and the corrosion inhibitor can protect the chloride ion corrosion of the steel bars in the reinforced concrete under the combined action, simultaneously increase the compactness of the concrete, reduce the porosity of the concrete, meet the requirement of the concrete on sulfate ion corrosion resistance, and is used for the corrosion prevention and rust inhibition of the reinforced concrete in areas with ultrahigh chloride ion and sulfate ion contents, such as coastal areas, salinized areas, south sea island reefs and the like.
Finally, it should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The concrete corrosion and rust inhibitor is characterized by comprising the following components in parts by weight: 5-15 parts of 4-aminocyclopentacarboxylic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of allicin and 1-4 parts of water reducing agent.
2. The concrete corrosion and rust inhibitor according to claim 1, wherein the concrete corrosion and rust inhibitor comprises the following components in parts by weight: 10 parts of 4-aminocyclohexane carboxylic acid, 40 parts of amide, 10 parts of sodium monofluorophosphate, 5 parts of alkyl polyether sulfonate, 35 parts of silica fume, 3 parts of benzotriazole, 2 parts of allicin and 2 parts of water reducing agent.
3. The corrosion and rust inhibitor for concrete according to claim 1, wherein said 4-aminocyclohexanecarboxylic acid is trans-4-aminocyclohexanecarboxylic acid.
4. The concrete corrosion and rust inhibitor according to claim 1, wherein the amide is prepared by the following steps: the amide is obtained by stirring and reacting 180-190 parts by weight of dihexylamine, 150-160 parts by weight of dipentylamine, 140-150 parts by weight of 2-ethylhexanoic acid, 125-135 parts by weight of 5-methylhexanoic acid and 390-410 parts by weight of water, and drying.
5. The corrosion and rust inhibitor for concrete according to claim 1, wherein said sodium monofluorophosphate is food grade.
6. The corrosion and rust inhibitor for concrete according to claim 1, wherein the alkyl polyether sulfonate is at least one of sodium alkyl polyoxyethylene ether sulfonate and potassium alkyl polyoxyethylene ether sulfonate.
7. The concrete corrosion and rust inhibitor according to claim 1, wherein the silica fume has a specific surface area of not less than 20m2The mass fraction of the particle diameter of the silica fume smaller than 1 mu m exceeds 99 percent; the benzotriazole is water-soluble benzotriazole.
8. The corrosion and rust inhibitor for concrete according to claim 1, wherein the allicin has diallyl disulfide and diallyl trisulfide as main components; the water reducing agent is a powdery polycarboxylate water reducing agent, and the water reducing rate of the water reducing agent is more than 26%.
9. A preparation method of a concrete corrosion and rust inhibitor is characterized by comprising the following steps:
obtaining an amide;
uniformly mixing 5-15 parts of 4-aminocyclopentanoic acid, 30-50 parts of amide, 10-20 parts of sodium monofluorophosphate, 3-8 parts of alkyl polyether sulfonate, 30-40 parts of silica fume, 2-6 parts of benzotriazole, 1-3 parts of garlicin and 1-4 parts of a water reducing agent in parts by weight to obtain the concrete corrosion and rust inhibitor.
10. The method for preparing the corrosion and rust inhibitor for concrete according to claim 9, wherein the step of obtaining the amide comprises the following steps:
the method comprises the following steps of stirring 180-190 parts by weight of dihexylamine, 150-160 parts by weight of dipentylamine, 140-150 parts by weight of 2-ethylhexanoic acid, 125-135 parts by weight of 5-methylhexanoic acid and 390-410 parts by weight of water for reaction, and drying to obtain the amide.
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