Composition for metal corrosion inhibition and degerming and method for preventing metal corrosion and degerming

Abstract

The invention relates to a composition for metal corrosion inhibition and degerming and a method for preventing metal corrosion and degerming, the composition contains at least one of ionic compounds with the structure shown in the formula, R is substituted or unsubstituted alkyl with the carbon atom number of 6-30, or substituted or unsubstituted aryl with the carbon atom number of 6-30, or is substituted or unsubstituted alkyl with the carbon atom number of 6-30, or is substituted or unsubstituted aryl with the carbon atom number of 6-30, or is substituted or unsubstituted aryl with the carbon atom number of 6-30, or is substituted or unsubstituted aryl with the carbon atom number of 6-30. X <-> is selected from Cl <->, Br <->, I <->, CH3SO3 <->, C6H5SO3 <-> or CH3C6H5SO3 <->; a substituent group in R is selected from one or more of a halogen group, a hydroxyl group, an amino group, an amido group, a sulfydryl group, an alkyl group with a carbon atom number of 1-3, an alkoxy group with a carbon atom number of 1-3, and a phenyl group. The composition disclosed by the invention has good metal corrosion inhibition and sterilization performance and is convenient to use.

Description

Technical Field

[0001] This disclosure relates to the field of metal corrosion inhibition, and more specifically, to a composition for metal corrosion inhibition and sterilization, and a method for preventing metal corrosion and sterilization. Background Technology

[0002] Metal materials are frequently used in industrial production equipment, and metal corrosion poses a significant safety hazard. Therefore, metal corrosion is a common problem in industrial production and equipment maintenance. Current technologies typically employ the addition of metal corrosion inhibitors to suppress or prevent metal corrosion. Common metal corrosion inhibitors include organic amines, thiourea derivatives, imidazoline derivatives, alkynyl alcohols, and benzotriazoles. However, these metal corrosion inhibitors still have many drawbacks, such as unsatisfactory corrosion inhibition performance, high toxicity, and poor water solubility.

[0003] Metal corrosion often occurs in aqueous or gaseous environments with high moisture content, which simultaneously promote the growth of bacteria and microorganisms. This is because, on the one hand, bacteria and microorganisms produce slime that deteriorates water quality and forms scale; on the other hand, the slime and scale can cause under-deposit corrosion of the metal. Therefore, when addressing the problem of metal corrosion inhibition, it is often necessary to consider sterilization while inhibiting corrosion. Summary of the Invention

[0004] The purpose of this disclosure is to provide a composition for metal corrosion inhibition and sterilization, as well as a method for preventing metal corrosion and sterilization. The composition for metal corrosion inhibition and sterilization disclosed herein has good metal corrosion inhibition and sterilization effects.

[0005] To achieve the above objectives, a first aspect of this disclosure provides a composition for metal corrosion inhibition and sterilization, said composition comprising at least one of the ionic compounds with the structure shown in formula (1).

[0006]

[0007] In formula (1), R is a substituted or unsubstituted alkyl group with 6-30 carbon atoms, or a substituted or unsubstituted aryl group with 6-30 carbon atoms, and X... - Selected from Cl - ,Br - I - CH3SO3 - C6H5SO3 - or CH3C6H5SO3 - ;

[0008] The substituent in R is selected from one or more of the following: halogen group, hydroxyl group, amino group, amine group, mercapto group, alkyl group with 1-3 carbon atoms, alkoxy group with 1-3 carbon atoms, and phenyl group.

[0009] Optionally, R is a substituted or unsubstituted alkyl group having 10-25 carbon atoms, or a substituted or unsubstituted aryl group having 10-25 carbon atoms;

[0010] Optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, and phenyl groups.

[0011] Optionally, R is an unsubstituted alkyl group having 6-30 carbon atoms, or an unsubstituted aryl group having 6-30 carbon atoms.

[0012] Optionally, R is an unsubstituted alkyl group having 8-24 carbon atoms; preferably, R is an unsubstituted alkyl group having 12-18 carbon atoms.

[0013] Optionally, R is selected from substituted or unsubstituted n-dodecyl, substituted or unsubstituted n-tridecyl, substituted or unsubstituted n-tetradecyl, substituted or unsubstituted n-pentadecanyl, substituted or unsubstituted n-hexadecyl, substituted or unsubstituted n-heptadecyl, substituted or unsubstituted n-octadecyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthraceneyl, substituted or unsubstituted phenanthyl, substituted or unsubstituted fluorenyl, and substituted or unsubstituted pyreneyl.

[0014] Optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, methyl groups, ethyl groups, methoxy groups, ethoxy groups, and phenyl groups.

[0015] Optionally, the ionic compound is selected from the group consisting of:

[0016]

[0017] Optionally, the composition may further contain one or more of thiourea, hexamethylenetetramine, organic amines, imidazoline, and quaternary ammonium salts;

[0018] Preferably, the organic amine is selected from one or more of ethylenediamine, hexamethylenediamine, ethanolamine, diethanolamine, triethanolamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, morpholine, and piperazine;

[0019] The quaternary ammonium salt is selected from one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, pyridine quaternary ammonium salt, and quinoline quaternary ammonium salt.

[0020] Optionally, the ionic compound is prepared by a method comprising the following steps:

[0021] Under heating conditions, the compound shown in formula (2) and the compound shown in formula (3) are brought into contact and reacted in a solvent.

[0022]

[0023] In formula (3), R is a substituted or unsubstituted alkyl group with 6-30 carbon atoms, or a substituted or unsubstituted aryl group with 6-30 carbon atoms, and -X is selected from -Cl, -Br, -I, CH3SO3-, C6H5SO3- or CH3C6H5SO3-.

[0024] The substituent in R is selected from one or more of the following: halogen group, hydroxyl group, amino group, amine group, mercapto group, alkyl group with 1-3 carbon atoms, alkoxy group with 1-3 carbon atoms, and phenyl group.

[0025] Optionally, the heating conditions include: a reaction temperature of 60-120℃ and a reaction time of 1-24h; the solvent is selected from one or more of methanol, ethanol, n-propanol, isopropanol, n-butanol, tetrahydrofuran, and 1,4-dioxane.

[0026] A second aspect of this disclosure provides a method for preventing metal corrosion and sterilizing, the method comprising: introducing a composition provided in the first aspect of this disclosure into a fluid medium; said fluid medium being a corrosive fluid medium and / or a fluid medium containing bacteria;

[0027] Optionally, the corrosive fluid medium is an acidic corrosive solution or produced water from an oil and gas field.

[0028] Optionally, the concentration of the composition in the fluid medium is 1-1000 mg / L, preferably 30-700 mg / L, preferably 50-300 mg / L, preferably 1-100 mg / L, and preferably 10-50 mg / L.

[0029] The composition disclosed herein has good metal corrosion inhibition and bactericidal properties, and is easy to use.

[0030] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 The 1H NMR spectrum of the ionic compound prepared in Example 1.

[0033] Figure 2The mass spectra of the ionic compounds prepared in Example 1.

[0034] Figure 3 The 1H NMR spectrum of the ionic compound prepared in Example 2.

[0035] Figure 4 The mass spectra of the ionic compounds prepared in Example 2.

[0036] Figure 5 The 1H NMR spectrum of the ionic compound prepared in Example 3.

[0037] Figure 6 The mass spectra of the ionic compounds prepared in Example 3. Detailed Implementation

[0038] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0039] In this application, the term "substituted or unsubstituted" means that the functional group described after the term may or may not have substituents (hereinafter, for ease of description, substituents are collectively referred to as R). If substituents are present, the number of substituents may be one or more. When the number of substituents is greater than one, the substituents may be the same or different. For example, "substituted or unsubstituted aryl" refers to an aryl group having one or more substituents R or an unsubstituted aryl group.

[0040] In this application, the number of carbon atoms in a substituted or unsubstituted functional group refers to the total number of carbon atoms. For example, if R is a substituted alkyl group with 6 carbon atoms, then the alkyl group and its substituents have a total of 6 carbon atoms.

[0041] In this application, aryl refers to any optional functional group or substituent derived from an aromatic carbon ring. An aryl group can be a monocyclic aryl (e.g., phenyl) or a polycyclic aryl; in other words, an aryl group can be a monocyclic aryl, a fused-ring aryl, two or more monocyclic aryl groups conjugated by carbon-carbon bonds, a monocyclic aryl and a fused-ring aryl group conjugated by carbon-carbon bonds, or two or more fused-ring aryl groups conjugated by carbon-carbon bonds. That is, unless otherwise stated, two or more aromatic groups conjugated by carbon-carbon bonds can also be considered as aryl groups in this application. Fused-ring aryl groups may include, for example, bicyclic fused aryl (e.g., naphthyl), tricyclic fused aryl (e.g., phenanthrene, anthracene, fluorene), etc. The aryl group does not contain heteroatoms such as B, N, O, S, P, Se, and Si. It should be noted that biphenyl and fluorene are both considered aryl groups in this application. Examples of aryl groups may include, but are not limited to, phenyl, naphthyl, anthracene, phenanthryl, fluorenyl, pyrene, etc.

[0042] In this application, the substituted aryl group may be one or more hydrogen atoms of the aryl group that are replaced by groups such as halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, phenyl groups, etc. It should be understood that the number of carbon atoms in the substituted aryl group refers to the total number of carbon atoms of the aryl group and its substituents. For example, a substituted aryl group with 18 carbon atoms means that the total number of carbon atoms of the aryl group and its substituents is 18.

[0043] In this application, the number of carbon atoms in an alkyl group can be 6-30, specifically 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30, or other values ​​within the range formed by any two of the aforementioned numbers. Alkyl groups can include straight-chain alkyl groups and branched-chain alkyl groups. Specific examples of alkyl groups include, but are not limited to, n-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, nonyl, decyl, 3,7-dimethyloctyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecanyl, n-hexadecyl, n-heptadecyl, and n-octadecyl.

[0044] The first aspect of this disclosure provides a composition for metal corrosion inhibition and sterilization, said composition comprising at least one of the ionic compounds with the structure shown in formula (1).

[0045]

[0046] In formula (1), R is a substituted or unsubstituted alkyl group with 6-30 carbon atoms, or a substituted or unsubstituted aryl group with 6-30 carbon atoms, and X... - Selected from Cl - ,Br - I - CH3SO3 - C6H5SO3 - or CH3C6H5SO3 - The substituents in R are selected from one or more of the following: halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, and phenyl groups.

[0047] The inventors of this disclosure unexpectedly discovered that the compositions of this disclosure have good dispersibility and surface activity, and when used for metal corrosion inhibition and sterilization, they have both good metal corrosion inhibition and sterilization effects.

[0048] In one specific embodiment of this disclosure, R is a substituted or unsubstituted alkyl group with 10-25 carbon atoms, or a substituted or unsubstituted aryl group with 10-25 carbon atoms; optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, and phenyl groups.

[0049] In one specific embodiment of this disclosure, R is an unsubstituted alkyl group having 6-30 carbon atoms, or an unsubstituted aryl group having 6-30 carbon atoms. Specifically, R is an unsubstituted alkyl group having 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30 carbon atoms, or an unsubstituted aryl group having 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, and 30 carbon atoms.

[0050] In one specific embodiment of this disclosure, R is an unsubstituted alkyl group having 8-24 carbon atoms, preferably an unsubstituted alkyl group having 12-18 carbon atoms.

[0051] In one specific embodiment of this disclosure, R is selected from substituted or unsubstituted n-dodecyl, substituted or unsubstituted n-tridecyl, substituted or unsubstituted n-tetradecyl, substituted or unsubstituted n-pentadecanyl, substituted or unsubstituted n-hexadecyl, substituted or unsubstituted n-heptadecyl, substituted or unsubstituted n-octadecyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthraceneyl, substituted or unsubstituted phenanthyl, substituted or unsubstituted fluorenyl, and substituted or unsubstituted pyreneyl; optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl, amino, amine, mercapto, methyl, ethyl, methoxy, ethoxy, and phenyl.

[0052] In one specific embodiment of this disclosure, the ionic compound is selected from the group consisting of:

[0053]

[0054]

[0055] In one specific embodiment of this disclosure, the composition further comprises one or more of thiourea, hexamethylenetetramine, organic amines, imidazoline, and alkyl quaternary ammonium salts. In this disclosure, the organic amines can be those well known to those skilled in the art, such as aliphatic amines, alkanolamines, and cycloalkanolamines. In one embodiment, the organic amine is selected from one or more of ethylenediamine, hexamethylenediamine, ethanolamine, diethanolamine, triethanolamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, morpholine, and piperazine. The quaternary ammonium salt can be selected from, but is not limited to, one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, pyridine quaternary ammonium salts, and quinoline quaternary ammonium salts.

[0056] According to this disclosure, the content of the ionic compound with the structure shown in formula (1) in the composition can vary over a wide range, for example, it can be 1-99% by weight, preferably 10-80% by weight.

[0057] In one specific embodiment of this disclosure, the ionic compound is prepared by a method comprising the following steps: under heating conditions, the compound represented by formula (2) and the compound represented by formula (3) are contacted and reacted in a solvent.

[0058]

[0059] In formula (3), R is a substituted or unsubstituted alkyl group with 6-30 carbon atoms, or a substituted or unsubstituted aryl group with 6-30 carbon atoms; -X is selected from -Cl, -Br, -I, CH3SO3-, C6H5SO3-, or CH3C6H5SO3-; the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, and phenyl groups. The method for preparing the ionic compounds disclosed herein is simple and has a high yield.

[0060] In one specific embodiment of this disclosure, the heating conditions include: a reaction temperature of 60-120°C and a reaction time of 1-24 h, preferably, a temperature of 80-100°C and a reaction time of 2-12 h; the solvent can be any solvent well known to those skilled in the art, and can be selected from, but not limited to, one or more of methanol, ethanol, n-propanol, isopropanol, n-butanol, tetrahydrofuran, and 1,4-dioxane.

[0061] A second aspect of this disclosure provides a method for preventing metal corrosion and sterilization, the method comprising: introducing a composition provided in the first aspect of this disclosure into a fluid medium; wherein the fluid medium is a corrosive fluid medium and / or a fluid medium containing bacteria; optionally, the corrosive fluid medium is an acidic corrosive solution or produced water from an oil and gas field.

[0062] According to this disclosure, the concentration of the composition in the fluid medium can vary within a wide range. In one embodiment of this disclosure, the concentration of the composition in the fluid medium is 1-1000 mg / L, preferably 30-700 mg / L, preferably 50-300 mg / L, preferably 1-100 mg / L, and preferably 10-50 mg / L.

[0063] In one embodiment, when the concentration of the composition in the fluid medium is 1-1000 mg / L, preferably 30-700 mg / L, and more preferably 50-300 mg / L, the composition within the above dosage range has a better corrosion inhibition effect.

[0064] In another embodiment, when the concentration of the composition in the fluid medium is 1-100 mg / L, preferably 10-50 mg / L, the composition within the above dosage range has a better bactericidal effect.

[0065] The present disclosure will be further illustrated by the following examples, but the present disclosure is not limited thereto.

[0066] The nuclear magnetic resonance (¹H NMR) analysis of this disclosure was performed using a Bruker Avance 400MHz NMR spectrometer, and the mass spectrometry (ESI-MS) analysis was performed using a Bruker Solarix FT-ICR MS Fourier transform ion cyclotron resonance mass spectrometer.

[0067] In the embodiments and comparative examples disclosed herein, vinylimidazole, haloalkanes, haloaromatics, ethanol, sulfuric acid, etc., were purchased from Beijing Innocare Technology Co., Ltd. or Sinopharm Chemical Reagent Co., Ltd., and tetradecanol mesylate was synthesized according to the reference (Novel Antiviral Activity of |L-Dideoxy Bicyclic Nucleoside Analogues versus Vaccinia and Measles Viruses in Vitro, Journal of Medical Chemistry, 2013, 56(3), 1311-1322.). Other raw materials were commercially available unless otherwise specified.

[0068] Example 1

[0069]

[0070] 4.706 g of vinylimidazole (0.05 mol), 6.031 g of chlorohexane (0.05 mol), and 10 mL of ethanol were added to a 100 mL single-necked flask and heated to reflux for 24 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a yellow viscous liquid, which is the target ionic compound. This ionic compound is used directly as a composition for metal corrosion inhibition and sterilization.

[0071] The target ionic compound was characterized by NMR, and the data are as follows: 1 ¹H NMR (400 MHz, DMSO): δ 9.61 (¹H, s), 8.24 (¹H, s), 7.97 (¹H, s), 7.32 (¹H, m), 5.99 (¹H, d), 5.42 (¹H, d), 4.20 (2H, m), 1.82 (2H, m), 1.27 (6H, m), 0.85 (3H, t). Characterization data by ESI-MS (cation) was 179.14.

[0072] Example 2

[0073]

[0074] 4.706 g of vinylimidazole (0.05 mol), 12.006 g of iodooctane (0.05 mol), and 10 mL of ethanol were added to a 100 mL single-necked flask, and the mixture was heated to reflux and reacted for 1 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a yellow viscous liquid, which was the target ionic compound.

[0075] The target ionic compound was characterized by NMR, and the data are as follows: 1 ¹H NMR (400 MHz, DMSO): δ 9.57 (¹H, s), 8.22 (¹H, s), 7.95 (¹H, s), 7.30 (¹H, m), 5.98 (¹H, d), 5.42 (¹H, d), 4.19 (2H, m), 1.82 (2H, m), 1.26 (¹⁰H, m), 0.85 (³H, t). Characterization data by ESI-MS (cationic) was 207.18.

[0076] Example 3

[0077]

[0078] 4.706 g of vinylimidazole (0.05 mol), 12.462 g of bromododecane (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask and heated to reflux for 4 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a yellow viscous liquid, which is the target ionic compound. This ionic compound is used directly as a composition for metal corrosion inhibition and sterilization.

[0079] The target ionic compound was characterized by NMR, and the data are as follows: 1 ¹H NMR (400 MHz, DMSO): δ 9.58 (¹H, s), 8.23 ​​(¹H, s), 7.96 (¹H, s), 7.30 (¹H, m), 5.98 (¹H, d), 5.42 (¹H, d), 4.20 (2H, m), 1.81 (2H, m), 1.23 (¹⁸H, m), 0.84 (³H, t). Characterization data by ESI-MS (cation) was 263.25.

[0080] Example 4

[0081]

[0082] 4.706 g of vinylimidazole (0.05 mol), 13.864 g of bromotetradecane (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask, and the mixture was heated to reflux and reacted for 6 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a yellow viscous liquid, which was the target ionic compound.

[0083] Example 5

[0084]

[0085] 4.706 g of vinylimidazole (0.05 mol), 15.267 g of hexadecane bromide (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask and heated to reflux for 6 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a pale yellow viscous solid, which was the target ionic compound.

[0086] Example 6

[0087]

[0088] The specific steps are as follows: 4.706 g of vinylimidazole (0.05 mol), 16.670 g of bromooctadecane (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask, heated to reflux, and reacted for 6 h. Then, the mixture was cooled to room temperature and evaporated to dryness to obtain a light yellow viscous solid, which is the target ionic compound.

[0089] Example 7

[0090]

[0091] The specific steps are as follows: 4.706 g of vinylimidazole (0.05 mol), 7.851 g of bromobenzene (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask, heated to reflux, and reacted for 6 h. Then, the mixture was cooled to room temperature and evaporated to dryness to obtain a light yellow viscous solid, which is the target ionic compound.

[0092] Example 8

[0093]

[0094] The specific steps are as follows: 4.706 g of vinylimidazole (0.05 mol), 10.353 g of 2-bromonaphthalene (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask, heated to reflux, and reacted for 6 h. Then, the mixture was cooled to room temperature and evaporated to dryness to obtain a light yellow viscous solid, which is the target ionic compound.

[0095] Example 9

[0096]

[0097] 4.706 g of vinylimidazole (0.05 mol), 14.624 g of tetradecyl methanesulfonate (0.05 mol), and 15 mL of ethanol were added to a 100 mL single-necked flask and heated to reflux for 6 h. The mixture was then cooled to room temperature and evaporated to dryness to obtain a yellow viscous liquid, which was the target ionic compound.

[0098] Example 10

[0099] The target ionic compound was prepared using the same method as in Example 4, except that the ionic compound prepared in Example 4 was mixed with thiourea and used as a composition for metal corrosion inhibition and sterilization. The weight ratio of the ionic compound to thiourea in the composition was 4:1.

[0100] Test Example 1

[0101] This test example is a corrosion test of rotating pads to demonstrate the effectiveness of the composition of this disclosure for metal corrosion inhibition.

[0102] Preparation of corrosion solution: Dissolve 260g of concentrated H2SO4 in 5L of deionized water to obtain a 0.5M H2SO4 solution.

[0103] Experimental Method: 250 mL of 0.5 M H₂SO₄ solution was placed in different glass bottles. 20# carbon steel test pieces, treated with ethanol and weighed, were suspended sequentially in these bottles, with the test pieces immersed in the solution but not touching the bottom or walls of the bottles. One bottle was left untreated as a blank test (i.e., Comparative Example 1), another bottle contained a certain concentration of vinylimidazole (i.e., Comparative Example 2), and the remaining bottles contained the corresponding concentrations of the ionic compounds prepared in the aforementioned examples (i.e., Examples 1-10). The glass bottles containing the corrosion solution and test pieces were placed in a rotary vat apparatus. The temperature of the rotary vat apparatus was set to 60 °C, the rotation speed to 28 r / min, the linear velocity to 1 m / s, and the test duration to 4 h. After the test, the test pieces were removed, treated with water and ethanol, and weighed. The mass loss of the test pieces before and after the test was calculated. The corrosion inhibition rate was calculated using the following formula, thus obtaining the corrosion inhibition performance of the agent. The results are shown in Table 1.

[0104] The formula for calculating corrosion inhibition rate is as follows:

[0105] η1=(Δm0-Δm1) / Δm0×100

[0106] In the formula: η1 — corrosion inhibition rate, %

[0107] Δm0—Mass loss of the specimen in the blank test, in g

[0108] Δm1—Mass loss of the test piece during the dosing test, in g

[0109] Table 1

[0110]

[0111]

[0112] Table 1 shows that the corrosion inhibition rate of the ionic compound disclosed in this invention gradually increases with the increase of the ionic compound concentration. Among them, Examples 4 to 6 show better corrosion inhibition performance, with corrosion inhibition rates exceeding 90% when the agent concentration is 100 mg / L. However, the raw material vinylimidazole, namely Comparative Example 2, has almost no corrosion inhibition performance.

[0113] Test Example 2

[0114] This test example is a bactericidal performance test of the composition to demonstrate the bactericidal effect of the composition disclosed herein.

[0115] Take samples with a bacterial count of 10 5 -10 7A water sample of 1 / mL was dispensed into 200mL Erlenmeyer flasks of 500mL each, and each flask was plugged with cotton. One flask was filled with deionized water (Comparative Example 1), another with a certain mass concentration of vinylimidazole (Comparative Example 2), and the remaining flasks were each filled with the corresponding mass concentration of the ionic compounds prepared in the aforementioned examples (i.e., Examples 1-10). The samples were thoroughly mixed, and all flasks were placed at a constant temperature of 30°C for 4 hours. Then, the total number of heterotrophic bacteria in each flask was determined using the plate count method, and the sterilization rate was calculated using the following formula.

[0116] η2=(n0-n1) / n0×100

[0117] In the formula: η2 — sterilization rate, %

[0118] n0 — Total number of heterotrophic bacteria in the blank test, CFU / mL

[0119] n1—Total number of heterotrophic bacteria in the drug dosing test, CFU / mL

[0120] Table 2

[0121]

[0122]

[0123] Table 2 shows that Examples 4 to 6 exhibited good bactericidal performance, with a bactericidal rate exceeding 97.5% when the agent concentration was 5 mg / L. However, the raw material, vinylimidazole (Comparative Example 2), did not show any bactericidal performance.

[0124] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0125] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0126] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A composition for metal corrosion inhibition and sterilization, said composition comprising at least one of an ionic compound with the structure shown in formula (1). In formula (1), R is a substituted or unsubstituted alkyl group having 6 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, X - is selected from the group consisting of Cl - , Br - , I - , CH3SO3 - , C6H5SO3 - , and CH3C6H5SO3 - ; The substituent in R is selected from one or more of the following: halogen group, hydroxyl group, amino group, amine group, mercapto group, alkyl group with 1-3 carbon atoms, alkoxy group with 1-3 carbon atoms, and phenyl group.

2. The composition of claim 1, wherein, R is a substituted or unsubstituted alkyl group having 10-25 carbon atoms, or a substituted or unsubstituted aryl group having 10-25 carbon atoms; Optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, alkyl groups with 1-3 carbon atoms, alkoxy groups with 1-3 carbon atoms, and phenyl groups.

3. The composition of claim 1, wherein, R is an unsubstituted alkyl group having 6-30 carbon atoms, or an unsubstituted aryl group having 6-30 carbon atoms.

4. The composition of claim 1, wherein, R is an unsubstituted alkyl group having 8-24 carbon atoms, preferably an unsubstituted alkyl group having 12-18 carbon atoms.

5. The composition of claim 1, wherein, The R is selected from substituted or unsubstituted n-dodecyl, substituted or unsubstituted n-tridecyl, substituted or unsubstituted n-tetradecyl, substituted or unsubstituted n-hexadecyl, substituted or unsubstituted n-pentadecanyl, substituted or unsubstituted n-heptadecyl, substituted or unsubstituted n-octadecyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthraceneyl, substituted or unsubstituted phenanthyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted pyreneyl; Optionally, the substituent in R is selected from one or more of halogen groups, hydroxyl groups, amino groups, amine groups, mercapto groups, methyl groups, ethyl groups, methoxy groups, ethoxy groups, and phenyl groups.

6. The composition of claim 1, wherein, The ionic compound is selected from the group consisting of the following compounds:

7. The composition of claim 1, wherein, The composition also contains one or more of thiourea, hexamethylenetetramine, organic amines, imidazoline, and quaternary ammonium salts; Preferably, the organic amine is selected from one or more of ethylenediamine, hexamethylenediamine, ethanolamine, diethanolamine, triethanolamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine, morpholine, and piperazine; The quaternary ammonium salt is selected from one or more of dodecyl dimethyl benzyl ammonium chloride, dodecyl dimethyl benzyl ammonium bromide, tetradecyl dimethyl benzyl ammonium chloride, pyridine quaternary ammonium salt, and quinoline quaternary ammonium salt.

8. The composition of claim 1, wherein, The ionic compound was prepared by a method comprising the following steps: Under heating conditions, the compound shown in formula (2) and the compound shown in formula (3) are brought into contact and reacted in a solvent. In formula (3), R is a substituted or unsubstituted alkyl group with 6-30 carbon atoms, or a substituted or unsubstituted aryl group with 6-30 carbon atoms, and -X is selected from -Cl, -Br, -I, CH3SO3-, C6H5SO3- or CH3C6H5SO3-. The substituent in R is selected from one or more of the following: halogen group, hydroxyl group, amino group, amine group, mercapto group, alkyl group with 1-3 carbon atoms, alkoxy group with 1-3 carbon atoms, and phenyl group.

9. The composition of claim 1, wherein, The heating conditions include: a reaction temperature of 60-120℃ and a reaction time of 1-24h; the solvent is selected from one or more of methanol, ethanol, n-propanol, isopropanol, n-butanol, tetrahydrofuran, and 1,4-dioxane.

10. A method of preventing metal corrosion and degerming, the method comprising: introducing the composition according to any one of claims 1 to 9 into a fluid medium; the fluid medium is a corrosive fluid medium and / or a fluid medium containing bacteria; optionally, the corrosive fluid medium is an acidic corrosive solution or produced water from an oil and gas field.

11. The method of claim 10, wherein, the concentration of the composition in the fluid medium is 1 to 1000 mg / L, preferably 30 to 700 mg / L, preferably 50 to 300 mg / L, preferably 1 to 100 mg / L, preferably 10 to 50 mg / L.

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