Curing type steel bar corrosion inhibition material and preparation method thereof

Abstract

The invention provides a healing type steel bar corrosion inhibition material and a preparation method thereof, and belongs to the technical field of metal corrosion prevention. The triethanolamine modified polyphenol is used as a healing type steel bar corrosion inhibition material and has an excellent control effect on corrosion of steel bars under the influence of Cl <-> corrosion, and the corrosion inhibition performance is improved along with the increase of the concentration. The corrosion inhibition material can form a non-conductive indissolvable complex with iron ions generated by a corrosion active part, and the non-conductive indissolvable complex is adsorbed on the surface of the reinforcing steel bar to form a compact protection layer to prevent Cl <-> from invading, so that corrosion is delayed. In an inactive area, the material can be adsorbed on the surface of the reinforcing steel bar by self functional group characteristics to prevent corrosion media from invading. Therefore, the method has important significance for repairing the corrosion active area of the reinforcing steel bar.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal corrosion prevention, and particularly relates to a healing type steel bar corrosion inhibition material and a preparation method thereof. BACKGROUND

[0002] Reinforced concrete is still one of the most important building structure materials in marine engineering construction due to the advantages of wide raw material sources, low cost, simple and mature production process, etc. However, the steel bars in the concrete are prone to corrosion under the harsh conditions of high temperature, high humidity and high salt in the marine environment all year round. Steel bar corrosion reduces the effective cross-sectional area of the steel bar and the load-bearing capacity of the structure. Severe corrosion can also cause the concrete structure to crack and peel, which seriously affects the service life of the structure and the safety production requirements. In particular, the corrosion of steel bars caused by Cl- erosion is one of the main reasons for the premature degradation and failure of reinforced concrete structures.

[0003] Gallic acid is usually studied as a component of plant extracts, and has good rust inhibition effect on steel bars in concrete. However, the complex composition of gallic acid brings difficulties to the understanding of the rust inhibition mechanism of steel bars. Secondly, the water solubility of gallic acid is poor, and the acidity is strong, which reduces the alkalinity of the concrete and limits its effectiveness and application in actual concrete. In recent years, people have tried to modify it through esterification to reduce acidity, improve water solubility and rust conversion capacity. This provides a new way for the application of gallic acid rust inhibitors in alkaline concrete environments. However, the rust inhibition mechanism of gallic acid ester on steel bars in concrete is not clear, and the influence mechanism of the chelation of polyphenols with Fe 2+ / Fe 3+ still needs further analysis and discussion.

[0004] Conventional steel bar rust inhibition materials focus on prevention, and the mechanism is usually based on surface physical and chemical adsorption. A film is formed on the surface of the steel bar before rusting, and the critical concentration of chloride ions is improved. However, for actual engineering application environments, the steel bars are often rusted during construction after being stored on the construction site and exposed to wind and rain. The adsorption and film formation of conventional rust inhibition materials on the rusted steel bar parts are very limited, and they cannot inhibit the further expansion of the rusted sites. Therefore, it is difficult to manage and protect the rusted steel bars with existing rust inhibition materials, which limits the corrosion prevention efficiency of the rust inhibition materials for steel bars and the application scenarios and promotion prospects.

[0005] Polyphenols represented by gallic acid can chelate with metal cations to form chelate substances, and the metal has a potential corrosion inhibition effect in a neutral environment. However, in a strong alkaline concrete environment, the acidic nature is easily neutralized and loses effectiveness, and the low solubility limits its effectiveness and application in alkaline concrete. SUMMARY

[0006] The present application aims to provide a healing type steel bar corrosion inhibition material and a preparation method thereof, adopt an esterification reaction, reduce the acidity of polyphenol substances, improve the solubility, utilize the chelation with metal ions to form a dense protective film layer at the steel bar corrosion site, realize the management and repair of the corroded steel bar, build a steel bar corrosion inhibition system with a healing effect, and solve the technical problem that the rust inhibition mode of the gallic acid rust inhibitor in the prior art is relatively one-sided and cannot realize the self-repair of the corroded steel bar.

[0007] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0008] The present application provides a preparation method of a healing type steel bar corrosion inhibition material, triethanolamine and polyphenol are reacted under the catalysis of a catalyst, and the healing type steel bar corrosion inhibition material is obtained after cooling.

[0009] Further, the polyphenol includes one or more of protocatechuic acid, coffee acid, salicylic acid, ellagic acid and gallic acid.

[0010] The catalyst includes 4-dimethylamino pyridine.

[0011] Further, the molar ratio of the triethanolamine and the polyphenol is 0.8-1.2:0.01-2.

[0012] The molar ratio of the polyphenol and the catalyst is 1:0.02-0.1.

[0013] Further, the triethanolamine is subjected to heat treatment, the heat treatment temperature is 90-120 DEG C, and the heat treatment time is 20-40 min.

[0014] Further, the reaction is carried out under heating and stirring, the heating and stirring temperature is 100-150 DEG C, and the heating and stirring time is 10-15 h.

[0015] The present application also provides a healing type steel bar corrosion inhibition material prepared by the above-mentioned preparation method, when the polyphenol is gallic acid, the healing type steel bar corrosion inhibition material is gallic acid ester, and the structural formula is formula 1.

[0016]

[0017] The present application has the following beneficial effects:

[0018] The polyphenol substance synthesized after the modification of triethanolamine has excellent control effect on the corrosion of steel bars under the influence of Cl- corrosion, and the rust inhibition performance increases with the increase of the concentration.

[0019] The polyphenols can form non-conductive and hardly soluble complexes with iron ions generated at the active corrosion sites, and are adsorbed on the surface of the steel bars to form a dense protective layer to block the invasion of Cl-, thereby delaying the continuation of corrosion. In the non-active area, the polyphenols can also be adsorbed on the surface of the steel bars to block the invasion of corrosion medium by relying on the functional group characteristics.

[0020] Taking gallate as an example, the gallate and the chelate of the gallate and metal ions have strong activity and high adsorption tendency on the surface of the steel. The gallate chelate molecules are effectively adsorbed on the surface of the steel by relying on groups containing O atoms and N atoms (such as hydroxyl, ester, phenolic hydroxyl and amine groups). The high adsorption is conducive to improving the protection time and prolonging the service life of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FTIR spectra of GA, TE, 3-hydroxypyridine and TG obtained in Example 1 and G3H obtained in Comparative Example 1;

[0022] Figure 2 Schematic diagram of OCP values of carbon steel samples in the blank group, the control group 1-2 and the application examples 1-3;

[0023] Figure 3 Polarization curve diagram of carbon steel samples in the blank group, the control group 1-2 and the application examples 1-3 after being immersed in the simulated corrosion solution for 24 hours;

[0024] Figure 4 SEM and EDS analysis diagrams of carbon steel samples in the blank group after being immersed in the simulated corrosion solution for 24 hours;

[0025] Figure 5 SEM and EDS analysis diagrams of carbon steel samples in the application example 1 and the application example 2 after being immersed in the simulated corrosion solution for 24 hours, wherein (d), (d-1) are the application example 1, (e), (e-1), (e-2) are the application example 2;

[0026] Figure 6 Raman spectrum diagram of carbon steel samples in the blank group, the control group 1 and the application examples 1-3 after being immersed in the simulated corrosion solution for 24 hours;

[0027] Figure 7 XPS fine spectrum fitting result diagram of different characteristic peaks of carbon steel samples in the blank group, the control group 1 and the application examples 1-3. DETAILED DESCRIPTION

[0028] The application provides a preparation method of a healing type steel bar corrosion inhibition material, in which triethanolamine and polyphenols are reacted under the catalysis of a catalyst, and the healing type steel bar corrosion inhibition material is obtained after cooling.

[0029] In the present application, the polyphenol comprises one or more of protocatechuic acid, caffeic acid, salicylic acid, ellagic acid and gallic acid, preferably one or more of gallic acid, ellagic acid and protocatechuic acid; and the catalyst is preferably 4-dimethylaminopyridine.

[0030] In the present application, when the polyphenol is gallic acid, the synthetic route of the healing-type reinforcing steel corrosion inhibiting material, i.e. TE-GAE, is as follows:

[0031]

[0032] In the present application, the molar ratio of the triethanolamine and the polyphenol is 0.8-1.2:0.01-2, preferably 1:1.

[0033] The molar ratio of the polyphenol and the catalyst is 1:0.02-0.1, preferably 1:0.05-0.08.

[0034] In the present application, the triethanolamine is subjected to heat treatment, the temperature of the heat treatment is 90-120℃, preferably 100℃; and the time of the heat treatment is 20-40min, preferably 30min.

[0035] In the present application, the reaction is carried out under heating and stirring, the temperature of the heating and stirring is 100-150℃, preferably 120℃; and the time of the heating and stirring is 10-15h, preferably 12h.

[0036] The present application also provides a healing-type reinforcing steel corrosion inhibiting material prepared by the above preparation method, when the polyphenol is gallic acid, the healing-type reinforcing steel corrosion inhibiting material is gallic acid ester, and the structural formula is Formula 1:

[0037]

[0038] In the present application, gallic acid (GA, 99%), 4-dimethylaminopyridine (DMAP, 99%), 3-hydroxypyridine (99%), aniline (≥99.5%), ethylbenzene (EB, >99.5%), polyvinyl alcohol (PVA, Mw≈27kg / mol, 98-99% hydrolysis), sodium dodecyl sulfate (SDS, AR), ammonium persulfate (APS, AR, 98.5%), dithiothreitol (DTT, 99%), hydrogen peroxide solution (3wt.% in H2O), anhydrous ethanol (≥99.7%), Ca(OH)2(AR) and NaCl (AR) are purchased from Shanghai Macklin Biochemical Co., Ltd., and triethanolamine (TE, 99%) is purchased from Tianjin Zhiyuan Chemical Reagent Co., Ltd. The epoxy resin is purchased from Shenzhen Hengchuang Electronic Material Co., Ltd.

[0039] In the present invention, cylindrical Q235 carbon steel with a diameter of 10 mm was selected, and its chemical composition is shown in Table 1:

[0040] Table 1 Chemical composition of carbon steel samples (wt. %)

[0041] Element Fe C Si Mn S P Content Bal. 0.17 0.09 0.28 0.007 0.011

[0042] In the present invention, the carbon steel sample was encapsulated with epoxy resin, and the exposed working surface had a diameter of 10 mm and an area of 78.5 mm 2 . An external lead was connected for convenient electrochemical testing. The exposed surface of the steel sample was polished with 80, 400, 800, 1500, 2000, 3000, and 4000 grit sandpaper, respectively, and then polished with diamond polishing agent to a mirror surface. The sample was then cleaned with deionized water and anhydrous ethanol. Finally, the sample was placed in a vacuum drying oven and dried at 60°C for standby.

[0043] In the present invention, infrared spectroscopy was used to determine the molecular structure. Fourier transform infrared spectra were recorded on a Thermo Nicolet spectrometer in the frequency range of 400-4000 cm -1 and a 1 cm -1 resolution. The automatic baseline and original spectral data were corrected using FTIR software.

[0044] In the present invention, electrochemical testing was used to test the corrosion of steel samples in different environments. A Wuhan Kostar electrochemical workstation was used for electrochemical testing of a three-electrode cell system. Whenever the working electrode was immersed in the solution for a period of time, the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), linear polarization (LPR), and potentiodynamic polarization (PDP) curves were tested.

[0045] In the present application, for the surface microscopic analysis of the steel bar sample, the surface morphology of the steel was observed using a scanning electron microscope, and the elemental composition of the steel was analyzed using energy dispersive X-ray spectroscopy. A focused ion beam device was used to cut the sample into a metal sheet of 10 μm x 10 μm x 50 μm. Then, a standard-sized sample was immediately prepared in a vacuum. A tungsten (W) protective layer was applied to cover the passivation film. High-resolution and spectral mode observation was performed using a high-resolution transmission electron microscope. The chemical composition of the steel surface was analyzed using an X-ray photoelectron spectrometer. The monochromatic X-ray "Al K-alpha radiation" had a spot size of 400 μm, an operating voltage of 12 kV, and a filament current of 6 mA; the energy range for full-spectrum scanning was 150 eV, with a step size of 1 eV; the energy range for narrow-spectrum scanning was 50 eV, with a step size of 0.1 eV. An X-ray diffractometer was used to perform X-ray diffraction analysis on the surface of the steel sample. The scanning range was set to 10-90°, and the scanning rate was 5 / min. Raman spectroscopy was used to study the properties of the products on the surface of the carbon steel. The Raman spectrum used a 325 nm He-Cd diode laser beam, and the acquisition range was 200-2000 cm -1 .

[0046] The technical solutions provided by the present application will be described in detail below in conjunction with the examples, but they should not be understood as limiting the scope of protection of the present application.

[0047] Example 1

[0048] At room temperature, 22 g of triethanolamine was placed in a three-necked flask equipped with a condenser, a thermometer, and a mechanical stirrer. The flask was then immersed in a magnetically stirred oil bath, heated to 100°C to reduce the viscosity of TE. After 30 minutes, 25 g of gallic acid was slowly added to the flask. Subsequently, 0.6 g of 4-dimethylaminopyridine was introduced as a catalyst. The mixture was mixed until the GA was completely dissolved, and the oil bath temperature was increased to 150°C. After continuous stirring for 10 hours, the mixture in the three-necked flask was cooled to room temperature to obtain a reddish-brown liquid, which was the product TE-GAE, denoted as TG.

[0049] Comparative Example 1

[0050] At room temperature, 10 g of gallic acid and 100 ml of absolute ethanol were placed in a three-necked flask equipped with a condenser, a thermometer, and a stirrer. The flask was placed in an oil bath with a magnetic stirrer and heated to 50°C. Subsequently, 5.59 g of 3-hydroxypyridine and 0.581 g of 4-dimethylaminopyridine were added, and continuous stirring was performed for 10 hours. After cooling the mixture in the three-necked flask to room temperature, a white precipitate was obtained by filtration. The precipitate was then washed with ethanol three times and dried in an oven to obtain a white powder, which was 3H-GAE, denoted as G3H;

[0051] The structural formula of 3H-GAE is as follows:

[0052]

[0053] Figure 1 The Fourier transform infrared spectra of triethanolamine, 3-hydroxypyridine, gallic acid, gallic acid ester TG obtained in Example 1 and G3H obtained in Comparative Example 1 are shown in the figures. It can be seen from the figures that gallic acid esters TG and G3H have been successfully synthesized.

[0054] Toxicity evaluation:

[0055] The oral LD50 (median lethal dose) of rats, the bioaccumulation factor (BAF) and the developmental toxicity were selected as evaluation indexes. Table 2 shows the toxicity parameters of TG obtained in Example 1 and G3H obtained in Comparative Example 1.

[0056] Table 2 Toxicity parameters of TG and G3H

[0057] Median lethal dose (mg / kg) Bioaccumulation factor Developmental toxicity Mutagenicity TG 3056.48 0.33 0.39 0.01 G3H 2559.24 3.79 0.46 0.33

[0058] Note: The toxicity evaluation criteria of each index are as follows: low toxicity (LD50≤2000), high toxicity (LD50≤500); low bioaccumulation potential (BAF<100), medium bioaccumulation potential (100≤BAF<1000), high bioaccumulation potential (BAF≥1000); developmental toxicity (developmental toxicity>0.5), developmental non-toxic (developmental toxicity<0.5); negative mutagenicity (mutagenicity>0.5), positive mutagenicity (mutagenicity<0.5).

[0059] As can be seen from Table 2, the developmental toxicity and mutagenicity of gallic acid esters TG and G3H are both less than 0.5, and the results are both negative, indicating that they have little effect on organisms. In general, both compounds show low toxicity and show potential as green rust inhibitors.

[0060] Application example

[0061] Test method: A NaOH solution with pH=10 was prepared with deionized water, which simulated the low alkaline environment prone to corrosion after the passivation film of the steel bar was damaged, and 0.1 mol / L NaCl was added to simulate Cl - invasion. This solution is named as simulated corrosion solution (SCR).

[0062] The steel test piece was immersed in the SCR solution for 600 s to simulate the Cl -The initial stage of corrosion. Subsequently, gallic acid solutions and gallic ester solutions of different concentrations were prepared as blank groups and rust inhibitor groups, respectively. The rust inhibitor groups included control groups 1-2 and application examples 1-3. The pre-corroded steel reinforcement samples were immersed in different solutions to study the repair behavior of gallic acid and its esterification products on steel reinforcement corrosion. The solution preparation schemes are shown in Table 3.

[0063] Table 3. Preparation methods of simulated corrosion solutions

[0064]

[0065]

[0066] Evaluation of the repair effect on corroded steel bars:

[0067] 1) Test items: The repair effects of gallic acid and two esterified modified products on corroded steel bars were compared, revealing their mechanism of action on steel bar corrosion from a microscopic perspective;

[0068] The corrosion-preservative properties of gallic acid esters were studied using electrochemical methods;

[0069] The surface morphology of the reinforcing bars was observed using scanning electron microscopy (SEM).

[0070] The elemental composition of the surface was scanned using energy-dispersive X-ray spectroscopy (EDS).

[0071] The chemical composition of the thin film formed on the steel surface was studied using X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy.

[0072] 2) Electrochemical performance testing

[0073] Test Method: Carbon steel samples were placed in a corrosive medium for 600 seconds to initiate pitting corrosion, and OCP was continuously monitored. Subsequently, the samples were transferred to different solutions, and the EIS was tested at 1 hour, 3 hours, 12 hours, and 24 hours to observe corrosion changes. After immersion for 24 hours, PDP testing was performed on the samples. EIS results were obtained at a potential of 10 mV using 10... 5 Up to 10 -2 The frequency range was estimated using Hz. PDP results were obtained within a potential range of -250 mV to +250 mV at a rate of 0.167 mV / s. Finally, the electrochemical impedance spectroscopy was fitted. All electrochemical tests were performed three times to ensure the repeatability of each experiment.

[0074] Figure 2 This diagram illustrates the OCP values ​​of carbon steel samples in the blank group, control groups 1-2, and application examples 1-3. Figure 2 As shown, the OCP value continuously decreased during the first 10 minutes of immersion, indicating that the steel sample was affected by Cl.- The OCP value of the TG group increased significantly after the addition of TG at 10 minutes, which significantly affected the corrosion rate of the steel, and the higher the concentration of TG, the greater the increase. In contrast, the OCP values of the GA group, G3H group, and blank group samples continued to decrease, and the initial decrease rate of the GA group and G3H group was significantly faster than that of the blank group. This indicates that GA and G3H do not have a significant inhibitory effect on steel corrosion at this concentration, which may be due to their strong acidity, while TG has better corrosion healing ability and faster reaction speed. Over time, the OCP tends to stabilize after 2 hours. The potential of the TG group increases with increasing concentration, and the potential of the GA group is slightly higher than that of the blank group. After 24 hours, the OCP value of the steel sample added with 0.05 mol / L G3H increases slightly, while the OCP of the steel sample added with 0.05 mol / L TG decreases, indicating that the sample may have corroded, indicating that a higher concentration of TG can significantly control the corrosion process of the steel, while a lower concentration has limited control effect. GA and G3H also have a certain delay effect on the corrosion process, but the effect is very small.

[0075] Figure 3 The polarization curve of the carbon steel sample in the simulated corrosion solution after 24 hours of immersion in the blank group, control group 1-2, and application examples 1-3 is shown in Table 4. Table 4 is the polarization parameters of the carbon steel sample in the simulated corrosion solution after 24 hours of immersion in the blank group, control group 1-2, and application examples 1-3.

[0076]

[0077] From the analysis results in Table 4, Figure 3 , it can be seen that a proper concentration of TG forms a chelate with metal ions, tightly adsorbed on the surface of the steel bar, preventing the transmission of corrosion ions to the active part of the steel surface, especially the anode area, and also has a certain degree of inhibition effect on the cathode reaction, showing a mixed inhibition effect, improving the corrosion resistance of the steel bar. Low concentration TG and GA have a small effect on corrosion, while high concentration TG provides excellent corrosion protection, consistent with the electrochemical impedance results.

[0078] The above results show that a certain concentration of gallic acid and gallic acid esters can affect the corrosion rate of the corroded steel bar. However, the control effect of GA and G3H is weak, and the transformed rust cannot be adsorbed on the surface of the steel bar in large quantities, and a strong barrier film cannot be formed. However, TG can transform rust and form a good film on the surface, hinder the electrochemical corrosion process, effectively control the corrosion rate, and high concentration TG has better film forming properties, more significant control effect, and longer duration.

[0079] 3) Micro-morphology characterization

[0080] Figure 4 SEM and EDS analysis images of the carbon steel sample in the blank group after being immersed in the simulated corrosion solution for 24 hours, Figure 5 SEM and EDS analysis images of the carbon steel sample in the application example 1 and the application example 2 after being immersed in the simulated corrosion solution for 24 hours, wherein (d) and (d-1) are the application example 1, and (e), (e-1) and (e-2) are the application example 2. Figure 4 It can be seen that the surface of the carbon steel sample is rough, and a large number of loose corrosion products are formed. EDS analysis shows that the surface material is mainly composed of Fe and O elements, which can be inferred to be mainly iron rust formed by the oxidation corrosion of the carbon steel. Figure 5 (d) is the surface morphology of the carbon steel immersed in the solution containing 0.1 mol / L TG for 24 hours. In the figure, it can be obviously observed that the pitting position formed by pre-corrosion is covered by a large amount of gallate and metal ion chelate to form a dense cluster to delay the corrosion.

[0081] The surface composition of the samples in different groups after being immersed in the solution for 24 hours was analyzed by Raman spectrum, and the position near the pitting pit was selected as the test point. Figure 6 Raman spectrum images of the carbon steel sample in the blank group, the control group 1 and the application examples 1-3 after being immersed in the simulated corrosion solution for 24 hours. The results show that the sample in the blank group has obviously corroded after 24 hours, and the corrosion product is mainly Fe2O3, which has been fully oxidized. The rust peak of the sample in the rust inhibitor group is reduced or even disappears, and a new peak representing an organic matter appears. From the above, Figure 6 From the spectral information, it can be seen that the addition of 0.05 mol / L GA does not obviously delay the corrosion of the steel bar, and serious corrosion still occurs after 24 hours; the high-concentration TG can form a dense chelate layer at the corrosion anode position, effectively reducing the corrosion rate and controlling the corrosion degree of the corroded steel bar, while the chelate formed by the low-concentration TG and GA has defects and limited ability to control corrosion.

[0082] Figure 7 XPS fine spectrum fitting result images of different characteristic peaks of the carbon steel sample in the blank group, the control group 1 and the application examples 1-3. From the figure, it can be seen that the low-concentration GA cannot form a dense protective layer on the surface and cannot control the development of corrosion; the low-concentration TG only controls the corrosion rate in the early stage, but the chelate layer is relatively loose, and the carbon steel continues to corrode after 24 hours; the appropriate concentration of TG forms a dense TG-Fe chelate layer in the active area of the corroded carbon steel, delays the corrosion rate, and the corrosion degree is relatively light.

[0083] From the above examples, it can be seen that the present application provides a healing type steel bar corrosion inhibition material and a preparation method thereof. The steel bar is corroded by Cl -After pitting, there are a large number of active Fe ions in the active corrosion pits, and there are also loose corrosion products near the pits. The phenolic hydroxyl groups in the polyphenol can release H + , dissolve the loose iron oxides in the outer layer, tightly wrap the corrosion active components (i.e. Fe 2+ / Fe 3+ ) in a chelated manner, form stable macromolecular chelates, and compete with Cl- for adsorption. Gallic acid esters can also form a hardly soluble complex with Ca 2+ , tightly adsorb on the surface of the steel bar, and, combined with the mutual connection of amorphous organic matter, form a dense protective layer. The organic matter film and the original passivation film form a "chelate-oxide" double-layer protective film, which blocks the contact of external corrosion medium with the steel bar matrix and delays the corrosion process. The organic matter layer is more dense and thicker than the original outer layer passivation film, and significantly enhances the protective property of the passivation film.

[0084] The above only describes the preferred embodiments of the present application, and it should be noted that, for those skilled in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A method for preparing a curative reinforcing steel corrosion inhibiting material, characterized by, Triethanolamine and polyphenol are reacted under the catalysis of a catalyst, and a healing-type reinforcing steel corrosion inhibiting material is obtained after cooling.

2. The method of claim 1, wherein the method is characterized by: The polyphenol comprises one or more of protocatechuic acid, caffeic acid, salicylic acid, ellagic acid and gallic acid; The catalyst comprises 4-dimethylamino pyridine.

3. The method of claim 1 or 2, wherein the method is characterized by: The molar ratio of the triethanolamine and the polyphenol is 0.8-1.2:0.01-2. The molar ratio of the polyphenol and the catalyst is 1:0.02-0.

1.

4. The method of claim 3, wherein the method is characterized by: The triethanolamine is subjected to heat treatment, the temperature of the heat treatment is 90-120 DEG C, and the time of the heat treatment is 20-40 min.

5. The method of claim 1 or 4, wherein the method is characterized by: The reaction is carried out under heating and stirring, the temperature of the heating and stirring is 100-150 DEG C, and the time of the heating and stirring is 10-15 h.

6. The healing-type reinforcement corrosion inhibiting material produced by the production method according to any one of claims 1 to 5, characterized by, When the polyphenol is specifically gallic acid, the healing-type reinforcing steel corrosion inhibiting material is gallic acid ester, and the structural formula is formula 1.

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