CN117684177A - Corrosion inhibitor - Google Patents
Corrosion inhibitor Download PDFInfo
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- CN117684177A CN117684177A CN202410103238.0A CN202410103238A CN117684177A CN 117684177 A CN117684177 A CN 117684177A CN 202410103238 A CN202410103238 A CN 202410103238A CN 117684177 A CN117684177 A CN 117684177A
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- ammonium salt
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- 238000005260 corrosion Methods 0.000 title claims abstract description 255
- 230000007797 corrosion Effects 0.000 title claims abstract description 248
- 239000003112 inhibitor Substances 0.000 title claims abstract description 173
- -1 imidazoline quaternary ammonium salt Chemical class 0.000 claims abstract description 81
- 239000009429 Ginkgo biloba extract Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229930182478 glucoside Natural products 0.000 claims abstract description 35
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 21
- 150000008131 glucosides Chemical class 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims description 25
- 235000000346 sugar Nutrition 0.000 claims description 14
- 150000002596 lactones Chemical class 0.000 claims description 13
- 229930003944 flavone Natural products 0.000 claims description 12
- 235000011949 flavones Nutrition 0.000 claims description 12
- 102000004169 proteins and genes Human genes 0.000 claims description 12
- 108090000623 proteins and genes Proteins 0.000 claims description 12
- 229930182470 glycoside Natural products 0.000 claims description 9
- MLSJBGYKDYSOAE-DCWMUDTNSA-N L-Ascorbic acid-2-glucoside Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O[C@@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)O)=C1O MLSJBGYKDYSOAE-DCWMUDTNSA-N 0.000 claims description 8
- 229940067599 ascorbyl glucoside Drugs 0.000 claims description 8
- 150000002213 flavones Chemical class 0.000 claims description 5
- 150000002338 glycosides Chemical class 0.000 claims description 5
- 150000002989 phenols Chemical class 0.000 claims description 3
- 150000008163 sugars Chemical class 0.000 claims description 3
- 229930003935 flavonoid Natural products 0.000 claims 1
- 150000002215 flavonoids Chemical class 0.000 claims 1
- 235000017173 flavonoids Nutrition 0.000 claims 1
- 230000005764 inhibitory process Effects 0.000 description 66
- 150000001875 compounds Chemical class 0.000 description 52
- 238000012360 testing method Methods 0.000 description 36
- 239000002609 medium Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 21
- 230000007935 neutral effect Effects 0.000 description 21
- 230000000694 effects Effects 0.000 description 15
- 238000001179 sorption measurement Methods 0.000 description 15
- 239000005639 Lauric acid Substances 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 13
- POULHZVOKOAJMA-UHFFFAOYSA-N methyl undecanoic acid Natural products CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 13
- 239000000419 plant extract Substances 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 11
- 238000010586 diagram Methods 0.000 description 11
- 238000002791 soaking Methods 0.000 description 11
- 239000002184 metal Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 229910006639 Si—Mn Inorganic materials 0.000 description 7
- GAMYVSCDDLXAQW-AOIWZFSPSA-N Thermopsosid Natural products O(C)c1c(O)ccc(C=2Oc3c(c(O)cc(O[C@H]4[C@H](O)[C@@H](O)[C@H](O)[C@H](CO)O4)c3)C(=O)C=2)c1 GAMYVSCDDLXAQW-AOIWZFSPSA-N 0.000 description 7
- 150000002212 flavone derivatives Chemical group 0.000 description 7
- VHBFFQKBGNRLFZ-UHFFFAOYSA-N vitamin p Natural products O1C2=CC=CC=C2C(=O)C=C1C1=CC=CC=C1 VHBFFQKBGNRLFZ-UHFFFAOYSA-N 0.000 description 7
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 5
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 5
- 239000012736 aqueous medium Substances 0.000 description 5
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 5
- 238000013329 compounding Methods 0.000 description 4
- 230000002195 synergetic effect Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Natural products OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- 235000011201 Ginkgo Nutrition 0.000 description 2
- 241000218628 Ginkgo Species 0.000 description 2
- 235000008100 Ginkgo biloba Nutrition 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 150000004676 glycans Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000002772 monosaccharides Chemical class 0.000 description 2
- 150000008442 polyphenolic compounds Chemical class 0.000 description 2
- 235000013824 polyphenols Nutrition 0.000 description 2
- 229920001282 polysaccharide Polymers 0.000 description 2
- 239000005017 polysaccharide Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical class C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides a corrosion inhibitor, relates to the technical field of corrosion inhibitors, and aims to solve the problem that the current corrosion inhibitor is low in slow release efficiency for water environment, wherein raw materials for preparing the corrosion inhibitor comprise ginkgo leaf extract, glucoside, imidazoline quaternary ammonium salt and emulsifying agent, and the mass of the ginkgo leaf extract is more than or equal to 40% and less than or equal to 65% of the total mass of the corrosion inhibitor; the mass percentage of the glucoside is more than or equal to 10 percent and less than or equal to 20 percent of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt is more than or equal to 5% and less than or equal to 10% of the total mass of the corrosion inhibitor; the mass percentage of the emulsifier is more than or equal to 20% and less than or equal to 30% of the total mass of the corrosion inhibitor.
Description
Technical Field
The invention relates to the technical field of corrosion inhibitors, in particular to a corrosion inhibitor.
Background
The corrosion inhibitor is a substance used for protecting the metal surface, and the addition of trace or small amount of the compound can obviously reduce the corrosion rate of the metal material in a certain medium to zero, and can also keep the original physical property and mechanical property of the metal material. From the viewpoint of corrosion inhibition effect, it is classified into an oxide film type, a precipitate film type and an adsorption film type. At present, the common inorganic corrosion inhibitor for steel is mainly of an oxide film type, and the organic corrosion inhibitor is mainly of an adsorption film type, wherein a part of precipitate substance components are doped, so that the compactness of a film layer is improved. The composition of the corrosion inhibitor such as nitrite and organic amine which are commonly used at present pollutes groundwater and the like no matter the oxidation film or the organic matter, so that the development of environment-friendly or plant extracts as main materials of the corrosion inhibitor has become a main development hot spot in the industry.
The existing corrosion inhibitor mainly faces an acidic environment, namely, can realize slow release on steel in the acidic environment, but lacks the corrosion inhibitor aiming at underground mine water and coal working environment, so that development of the corrosion inhibitor applicable to water environment, particularly underground mine water and coal working environment is needed.
Disclosure of Invention
The first aspect of the invention provides a corrosion inhibitor, which aims to solve the problem that the current corrosion inhibitor is low in slow release efficiency aiming at water environment.
The preparation raw materials of the corrosion inhibitor comprise ginkgo leaf extract, glucoside, imidazoline quaternary ammonium salt and emulsifying agent, wherein the mass of the ginkgo leaf extract is more than or equal to 40% and less than or equal to 65% of the total mass of the corrosion inhibitor; the mass percentage of the glucoside is more than or equal to 10 percent and less than or equal to 20 percent of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt is more than or equal to 5% and less than or equal to 10% of the total mass of the corrosion inhibitor; the mass percentage of the emulsifier is more than or equal to 20% and less than or equal to 30% of the total mass of the corrosion inhibitor.
The corrosion inhibitor provided by the invention takes ginkgo leaf extract, glucoside, imidazoline quaternary ammonium salt and emulsifying agent as raw materials, so that the corrosion inhibitor prepared by the invention is more environment-friendly, and the synergistic effect of the components can be fully exerted by controlling the mass fraction of the components, thereby having excellent corrosion inhibition effect in neutral water medium, and the corrosion inhibition efficiency is more than 95%.
In some technical schemes, optionally, the mass percentage of the ginkgo leaf extract in the total mass of the corrosion inhibitor is more than or equal to 50% and less than or equal to 65%.
In some technical schemes, optionally, the mass percentage of the ginkgo leaf extract accounting for the total mass of the corrosion inhibitor is equal to 50%; the mass percentage of the glucoside accounting for 15 percent of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt accounting for the total mass of the corrosion inhibitor is equal to 10 percent; the mass of the emulsifier is equal to 25 percent of the total mass of the corrosion inhibitor.
In some embodiments, optionally, the ginkgo leaf extract comprises flavones, lactones, proteins, sugars, phenols and water, wherein the flavones account for 20% or more and 30% or less of the ginkgo leaf extract by mass; the mass percentage of lactone in ginkgo leaf extract is more than or equal to 4 percent and less than or equal to 10 percent, and the balance is protein, sugar, phenol and water.
In the technical scheme, the ginkgo leaf extract is flavone, lactone, protein, sugar, phenol and water extracted from ginkgo leaves, wherein the flavone accounts for more than or equal to 20 mass percent and less than or equal to 30 mass percent of the ginkgo leaf extract, the lactone accounts for more than or equal to 4 mass percent and less than or equal to 10 mass percent of the ginkgo leaf extract, and the balance is protein, sugar, phenol and water. For example, 24% flavone, 6% lactone, the balance protein, sugar, phenol and water. Wherein, the sugar can be polysaccharide or monosaccharide, the phenol can be condensed polyphenol, and the ginkgo leaf extract can further improve the corrosion inhibition efficiency.
In some embodiments, optionally, the glycoside comprises ascorbyl glucoside or lauroyl glucoside.
In the technical scheme, compared with the conventional alkyl glycoside, the ascorbic acid glucoside or lauric acid glucoside has more adsorption sites, and the more adsorption sites enable the ascorbic acid glucoside or lauric acid glucoside to be adsorbed on the surface of the metal more easily to form an adsorption film, so that the corrosion of the metal is slowed down, and the prepared corrosion inhibitor is more suitable for a neutral aqueous medium.
In some embodiments, the imidazoline quaternary ammonium salt optionally includes heptadecenyl amine ethyl imidazoline quaternary ammonium salt.
In the technical scheme, heptadecenyl amine ethyl imidazoline quaternary ammonium salt is adopted, compared with the conventional rosin imidazoline quaternary ammonium salt, the heptadecenyl amine ethyl imidazoline quaternary ammonium salt has more adsorption sites, and the large pi bond adsorption capacity is stronger, so that the heptadecenyl amine ethyl imidazoline quaternary ammonium salt is easier to adsorb on the surface of metal to form an adsorption film, the corrosion of the metal is facilitated to be slowed down, and the prepared corrosion inhibitor is more suitable for neutral water medium.
In some embodiments, optionally, the emulsifier comprises an OP-type emulsifier, such as OP-10.
In the technical scheme, the pitting corrosion inhibition capacity can be obviously enhanced through OP-10 compounding, and further the corrosion inhibition efficiency in a neutral aqueous medium is improved.
In some embodiments, optionally, the imidazolinium quaternary ammonium salt has a purity of 99% or greater and a PH of 3-5.
In the technical scheme, the purity and the PH value of the imidazoline quaternary ammonium salt are controlled, so that the corrosion inhibition efficiency of the corrosion inhibitor can be further improved. For example, the imidazoline quaternary ammonium salt has a pH of 4.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of embodiments according to the present invention will be apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows one of the schematic flow diagrams of the preparation of the corrosion inhibitor provided by the embodiment of the invention;
FIG. 2 shows a second schematic diagram of a preparation process of the corrosion inhibitor according to the embodiment of the present invention;
FIG. 3 shows a third schematic diagram of a preparation process of the corrosion inhibitor according to the embodiment of the present invention;
FIG. 4 shows a fourth schematic diagram of a preparation flow of the corrosion inhibitor provided by the embodiment of the invention;
FIG. 5 shows a fifth schematic diagram of a preparation flow of a corrosion inhibitor provided by an embodiment of the present invention;
FIG. 6 shows a sixth schematic diagram of a preparation flow of the corrosion inhibitor provided by the embodiment of the invention;
FIG. 7 shows one of the schematic flow diagrams of the preparation of the corrosion inhibitor provided in the comparative example of the present invention;
FIG. 8 shows a second schematic diagram of the preparation process of the corrosion inhibitor provided by the comparative example of the present invention;
FIG. 9 shows a third schematic diagram of the preparation flow of the corrosion inhibitor provided by the comparative example of the present invention;
FIG. 10 shows a fourth schematic diagram of the preparation flow of the corrosion inhibitor provided by the comparative example of the present invention;
FIG. 11 shows a fifth schematic diagram of the preparation flow of the corrosion inhibitor provided by the comparative example of the present invention.
Detailed Description
In order that the above-recited aspects, features and advantages of embodiments according to the present invention can be more clearly understood, a further detailed description of embodiments according to the present invention will be rendered by reference to the appended drawings and detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments according to the invention, however, embodiments according to the invention may be practiced otherwise than as described herein, and thus the scope of protection according to embodiments of the invention is not limited by the specific embodiments disclosed below.
Example 1:
as shown in fig. 1, the invention provides a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water media, which comprises the following steps:
s102: mixing ginkgo leaf extract, ascorbyl glucoside, heptadecenyl amine ethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 20%, 10% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor;
wherein the ginkgo leaf extract comprises the following components in percentage by mass: 24% of flavone, 6% of lactone, 15% of protein, 15% of sugar, 5% of phenol and the balance of water, and the total amount is 100%.
The obtained compound corrosion inhibitor is added into 100g of neutral water corrosion medium, si-Mn steel test pieces are placed in the solution added with and without the compound corrosion inhibitor, corrosion inhibition rate test is carried out after soaking for 24 hours at room temperature, the result is shown in a table I, and after the corrosion inhibitor is added, the self corrosion inhibition rate of the test pieces is obviously reduced, so that the corrosion inhibitor has excellent corrosion inhibition effect.
List one
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 73.14％ | 81.75％ | 93.77％ | 95.17％ |
Example 2:
as shown in fig. 2, the invention provides a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water media, which comprises the following steps:
s202: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 20%, 10% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
The obtained compound corrosion inhibitor is added into 100g of neutral water corrosion medium, si-Mn steel test pieces are placed in the solution added with and without the compound corrosion inhibitor, corrosion inhibition rate test is carried out after soaking for 24 hours at room temperature, the result is shown in a table II, and after the corrosion inhibitor is added, the self corrosion inhibition rate of the test pieces is obviously reduced, so that the corrosion inhibitor has excellent corrosion inhibition effect.
Watch II
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 57.17％ | 60.37％ | 73.14％ | 81.55％ |
Example 3:
as shown in fig. 3, the invention provides a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water media, which comprises the following steps:
s302: mixing ginkgo leaf extract, ascorbyl glucoside, heptadecenyl amine ethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 15%, 10% and 25%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The results are shown in Table III, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
Watch III
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 68.17％ | 78.15％ | 86.66％ | 88.34％ |
Example 4:
as shown in fig. 4, the invention provides a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water media, which comprises the following steps:
s402: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 15%, 10% and 25%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The results are shown in Table IV, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
Table four
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 63.19％ | 72.12％ | 80.91％ | 85.10％ |
Example 5:
as shown in fig. 5, the present embodiment provides a preparation method of an environment-friendly plant extract compound corrosion inhibitor applicable to pure water media, which comprises the following steps:
s502: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 40%, 20%, 10% and 30%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The results are shown in Table five, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
TABLE five
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 64.23％ | 70.15％ | 79.56％ | 84.35％ |
Example 6:
as shown in fig. 6, the preparation method of the environment-friendly plant extract compound corrosion inhibitor applicable to pure water media is provided in the embodiment as follows:
s602: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 65%, 10%, 7% and 18%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The results are shown in Table six, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
TABLE six
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 70.26％ | 75.14％ | 80.26％ | 88.65％ |
Comparative example 1:
as shown in fig. 7, this comparative example proposes a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water medium, as follows:
s702: mixing ginkgo leaf extract, alkyl glycoside, heptadecenyl amine ethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 20%, 10% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The results are shown in Table seven, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
Watch seven
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 27.37％ | 35.19％ | 50.87％ | 61.55％ |
Comparative example 2:
as shown in fig. 8, this comparative example proposes a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water medium, as follows:
s802: mixing ginkgo leaf extract, ascorbyl glucoside, rosin imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 50%, 20%, 10% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The test results are shown in a table eight, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has an excellent corrosion inhibition effect.
Table eight
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 30.18％ | 39.66％ | 47.67％ | 71.43％ |
Comparative example 3:
as shown in fig. 9, this comparative example proposes a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water medium, as follows:
s902: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 65%, 5%, 10% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
And adding the obtained compound corrosion inhibitor into 100g of neutral water corrosion medium, placing a Si-Mn steel test piece in the solution with and without the compound corrosion inhibitor, and carrying out corrosion inhibition rate test after soaking for 24 hours at room temperature.
The test results are shown in the following Table nine, and the self-corrosion inhibition rate of the test piece is obviously reduced after the corrosion inhibitor is added, so that the corrosion inhibitor has excellent corrosion inhibition effect.
Table nine
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 45.16％ | 53.48％ | 64.93％ | 80.11％ |
Comparative example 4:
as shown in fig. 10, this comparative example proposes a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water medium, as follows:
s1002: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 58%, 20%, 2% and 20%, wherein the sum of the percentages of the components is 100%, thus obtaining the compound corrosion inhibitor.
The obtained compound corrosion inhibitor is added into 100g of neutral water corrosion medium, si-Mn steel test pieces are placed in the solution added with and without the compound corrosion inhibitor, corrosion inhibition rate test is carried out after soaking for 24 hours at room temperature, the result is shown in Table ten, and after the corrosion inhibitor is added, the self corrosion inhibition rate of the test pieces is obviously reduced, thus indicating that the corrosion inhibitor has excellent corrosion inhibition effect.
Ten meters
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 44.71％ | 57.93％ | 65.27％ | 84.94％ |
Comparative example 5:
as shown in fig. 11, this comparative example proposes a preparation method of an environment-friendly plant extract compound corrosion inhibitor suitable for pure water medium, as follows:
s1102: mixing ginkgo leaf extract, lauric acid glucoside, heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt and OP-10 according to the mass fractions of 30%, 20% and 20%, wherein the sum of the percentages of the components is 100%, and obtaining the compound corrosion inhibitor.
The obtained compound corrosion inhibitor is added into 100g of neutral water corrosion medium, si-Mn steel test pieces are placed in the solution with and without the compound corrosion inhibitor, corrosion inhibition rate test is carried out after soaking for 24 hours at room temperature, the result is shown in Table eleven, and after the corrosion inhibitor is added, the self corrosion inhibition rate of the test pieces is obviously reduced, thus indicating that the corrosion inhibitor has excellent corrosion inhibition effect.
Table eleven
| Corrosion inhibitor content | 0.1g | 0.2g | 0.4g | 0.8g |
| Corrosion inhibition efficiency | 32.65％ | 42.31％ | 56.32％ | 60.63％ |
As is clear from the data analysis of examples 1 to 6 and comparative examples 1 to 5, the corrosion inhibition efficiency was good in all of examples 1 to 6, however, the conventional alkyl glycoside was used as the glycoside in comparative example 1, so that the corrosion inhibition efficiency was low because the conventional alkyl glycoside was low in adsorption site, which was unfavorable for the formation of an adsorption film on the metal surface, while the conventional rosin imidazoline quaternary ammonium salt was used as the imidazoline quaternary ammonium salt in comparative example 2, so that the conventional rosin imidazoline quaternary ammonium salt was low in adsorption site, and the adsorption capacity was weak, which was difficult to adsorb on the metal surface to form an adsorption film, and the corrosion inhibition efficiency was low in comparative example 3, and the use amount of lauric acid glucoside was low because the lauric acid glucoside was effective in forming an adsorption film on the metal surface in the corrosion inhibitor, and the use amount of heptadecylethylimidazoline quaternary ammonium salt was low in comparative example 4, which was effective in forming an adsorption film on the metal surface in the corrosion inhibitor, and the corrosion inhibition efficiency was low because the heptadecylethylimidazoline quaternary ammonium salt was effective. In comparative example 5, however, the amounts of the lauric acid glucoside and the heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt are too much, and test results prove that too much lauric acid glucoside and heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt are not beneficial to protecting metals, and the corresponding corrosion inhibition efficiency is relatively low.
The invention further provides a corrosion inhibitor, wherein the preparation raw materials of the corrosion inhibitor comprise ginkgo leaf extract, glycoside, imidazoline quaternary ammonium salt and emulsifying agent, and the mass percentage of the ginkgo leaf extract is more than or equal to 40% and less than or equal to 65% of the total mass of the corrosion inhibitor; the mass percentage of the glucoside is more than or equal to 10 percent and less than or equal to 20 percent of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt is more than or equal to 5% and less than or equal to 10% of the total mass of the corrosion inhibitor; the mass percentage of the emulsifier is more than or equal to 20 percent and less than or equal to 30 percent of the total mass of the corrosion inhibitor, and the sum of the percentages of the components is 100 percent. For example, the mass of ginkgo leaf extract accounts for 40%, 45%, 50%, 55%, 65% of the total mass of the corrosion inhibitor; the mass percentage of the glucoside is 10%, 15%, 20% and the like of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt to the total mass of the corrosion inhibitor is 5%, 7%, 10% and the like; the mass of the emulsifier accounts for 20%, 25%, 30% of the total mass of the corrosion inhibitor.
The corrosion inhibitor provided by the invention takes ginkgo leaf extract, glucoside, imidazoline quaternary ammonium salt and emulsifying agent as raw materials, so that the corrosion inhibitor prepared by the invention is more environment-friendly, and the synergistic effect of the components can be fully exerted by controlling the mass fraction of the components, thereby having excellent corrosion inhibition effect in neutral water medium, and the corrosion inhibition efficiency is more than 95%. Optionally, the mass percentage of the ginkgo leaf extract is more than or equal to 50% and less than or equal to 65% of the total mass of the corrosion inhibitor.
In some embodiments, optionally, the mass of ginkgo leaf extract is equal to 50% by mass of the total mass of the corrosion inhibitor; the mass percentage of the glucoside accounting for 15 percent of the total mass of the corrosion inhibitor; the mass percentage of the imidazoline quaternary ammonium salt accounting for the total mass of the corrosion inhibitor is equal to 10 percent; the mass of the emulsifier is equal to 25 percent of the total mass of the corrosion inhibitor.
In some embodiments, optionally, the ginkgo leaf extract comprises flavones, lactones, proteins, sugars, phenols and water, wherein the flavones comprise greater than or equal to 20% and less than or equal to 30% of the ginkgo leaf extract by mass; the mass percentage of lactone in ginkgo leaf extract is more than or equal to 4 percent and less than or equal to 10 percent, and the balance is protein, sugar, phenol and water.
In the technical scheme, the ginkgo leaf extract is flavone, lactone, protein, sugar, phenol and water extracted from ginkgo leaves, wherein the flavone accounts for more than or equal to 20 mass percent and less than or equal to 30 mass percent of the ginkgo leaf extract, the lactone accounts for more than or equal to 4 mass percent and less than or equal to 10 mass percent of the ginkgo leaf extract, and the balance is protein, sugar, phenol and water. For example, 24% flavone, 6% lactone, the balance protein, sugar, phenol and water. Wherein, the sugar can be polysaccharide or monosaccharide, the phenol can be condensed polyphenol, and the ginkgo leaf extract can further improve the corrosion inhibition efficiency.
In some embodiments, optionally, the glycoside comprises ascorbyl glucoside or lauroyl glucoside.
In this example, ascorbyl glucoside or lauroyl glucoside was used to make the prepared corrosion inhibitors more compatible with neutral aqueous media than conventional alkyl glucosides.
In some embodiments, optionally, the imidazoline quaternary ammonium salt comprises a heptadecenyl amine ethyl imidazoline quaternary ammonium salt.
In this example, heptadecenyl amine ethyl imidazoline quaternary ammonium salt is used to make the prepared corrosion inhibitor more suitable for neutral aqueous medium than conventional rosin imidazoline quaternary ammonium salt.
In some embodiments, optionally, the emulsifier comprises an OP-type emulsifier, such as OP-10.
In the embodiment, the pitting corrosion inhibition capacity can be obviously enhanced through OP-10 compounding, so that the corrosion inhibition efficiency in a neutral aqueous medium is improved.
In some embodiments, the imidazolinium salt optionally has a purity of 99% or greater and a PH of 3-5.
In this embodiment, the purity and pH of the imidazoline quaternary ammonium salt can be controlled to further increase the corrosion inhibition efficiency of the corrosion inhibitor. Alternatively, the imidazoline quaternary ammonium salt has a pH of 4.
The beneficial effects of the invention are as follows:
1. the ginkgo leaf extract of the invention is environment-friendly and the final compound corrosion inhibitor has better water solubility;
2. the imidazoline quaternary ammonium salt is easy to purchase and low in energy consumption;
3. the ginkgo leaf extract, the glucoside and the imidazoline quaternary ammonium salt have good water solubility;
4. the compound of the invention and OP-10 can obviously enhance the pitting corrosion inhibition capability;
5. the invention fully exerts the synergistic effect of each component by a method of compounding and synergy of the corrosion inhibitor, thereby having excellent corrosion inhibition effect in neutral water medium, and the corrosion inhibition efficiency is more than 95%.
6. The compounding method is simple, and the synergistic effect of the components in the compound corrosion inhibitor ensures that the consumption of the components is low, so that the compound corrosion inhibitor has high corrosion inhibition efficiency.
The invention relates to an application of an environment-friendly plant extract compound corrosion inhibitor, which comprises the following steps: the compound corrosion inhibitor is added into the neutral water corrosion medium according to the proportion that each 100g of corrosion medium contains 0.1g-1g of compound corrosion inhibitor.
The ginkgo leaf extract, ascorbyl glucoside and lauroyl glucoside of the present invention are purchased from Henan certain biological limited company.
Heptadecenyl amine ethyl imidazoline quaternary ammonium salt and heptadecenyl hydroxyethyl imidazoline quaternary ammonium salt are purchased from Qin Royal island certain technology Co.
In embodiments according to the invention, the terms "first," "second," "third," and the like are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments according to the present invention can be understood by those of ordinary skill in the art according to specific circumstances.
Moreover, although operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the invention. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.
The above is only a preferred embodiment according to the embodiment of the present invention and is not intended to limit the embodiment according to the present invention, and various modifications and variations may be possible to the embodiment according to the present invention for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments according to the present invention should be included in the protection scope of the embodiments according to the present invention.
Claims (10)
1. A corrosion inhibitor is characterized in that the preparation raw materials of the corrosion inhibitor comprise ginkgo leaf extract, glucoside, imidazoline quaternary ammonium salt and emulsifying agent,
the mass of the ginkgo leaf extract accounts for 40% or more and 65% or less of the total mass of the corrosion inhibitor;
the mass percentage of the glucoside is more than or equal to 10% and less than or equal to 20% of the total mass of the corrosion inhibitor;
the mass percentage of the imidazoline quaternary ammonium salt is more than or equal to 5% and less than or equal to 10% of the total mass of the corrosion inhibitor;
the mass of the emulsifier is more than or equal to 20% and less than or equal to 30% of the total mass of the corrosion inhibitor.
2. The corrosion inhibitor according to claim 1, wherein,
the mass of the ginkgo leaf extract accounts for 50% of the total mass of the corrosion inhibitor;
the mass percentage of the glucoside accounting for the total mass of the corrosion inhibitor is equal to 15 percent;
the mass of the imidazoline quaternary ammonium salt is equal to 10% of the total mass of the corrosion inhibitor;
the mass of the emulsifier is 25% of the total mass of the corrosion inhibitor.
3. The corrosion inhibitor according to claim 1, wherein the ginkgo leaf extract comprises flavones, lactones, proteins, sugars, phenols and water,
the flavonoid accounts for more than or equal to 20 mass percent and less than or equal to 30 mass percent of the ginkgo leaf extract;
the mass percentage of the lactone in the ginkgo leaf extract is more than or equal to 4% and less than or equal to 10%.
4. The corrosion inhibitor according to claim 1, wherein the glycoside comprises ascorbyl glucoside or lauroyl glucoside.
5. The corrosion inhibitor according to claim 1, wherein the imidazoline quaternary ammonium salt comprises heptadecenyl amine ethyl imidazoline quaternary ammonium salt.
6. The corrosion inhibitor according to claim 1, wherein,
the emulsifier comprises OP type emulsifier.
7. The corrosion inhibitor according to claim 6, wherein,
the emulsifier comprises OP-10.
8. The corrosion inhibitor according to claim 1, wherein the imidazoline quaternary ammonium salt has a purity of 99% or more.
9. The corrosion inhibitor according to claim 1, wherein the imidazoline quaternary ammonium salt has a PH of 3-5.
10. The corrosion inhibitor according to claim 9, wherein the imidazoline quaternary ammonium salt has a PH of 4.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017067094A1 (en) * | 2015-10-21 | 2017-04-27 | 深圳市广昌达石油添加剂有限公司 | Iimidazoline compound corrosion inhibitor and preparation method thereof |
| CN106978603A (en) * | 2017-04-12 | 2017-07-25 | 西南林业大学 | A kind of plant compound corrosion inhibitor and preparation method and application |
| CN107142481A (en) * | 2017-06-22 | 2017-09-08 | 西南石油大学 | A kind of method that ginkgo leaf compounding prepares corrosion inhibiter |
| CN111663143A (en) * | 2020-07-02 | 2020-09-15 | 重庆电力高等专科学校 | Acid-washing compound corrosion inhibitor for thermal equipment and preparation method thereof |
| BR102019010579A2 (en) * | 2019-05-23 | 2020-12-01 | Fundação Universidade Federal Do Pampa | WATER SOLUTION CONTAINING EUPHORBIA TIRUCALLI EXTRACT AS NATURAL CORROSION INHIBITOR |
| CN115044909A (en) * | 2022-06-20 | 2022-09-13 | 郑州市新郑梅久实业有限公司 | Corrosion inhibitor for chemical pipeline |
-
2024
- 2024-01-25 CN CN202410103238.0A patent/CN117684177A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017067094A1 (en) * | 2015-10-21 | 2017-04-27 | 深圳市广昌达石油添加剂有限公司 | Iimidazoline compound corrosion inhibitor and preparation method thereof |
| CN106978603A (en) * | 2017-04-12 | 2017-07-25 | 西南林业大学 | A kind of plant compound corrosion inhibitor and preparation method and application |
| CN107142481A (en) * | 2017-06-22 | 2017-09-08 | 西南石油大学 | A kind of method that ginkgo leaf compounding prepares corrosion inhibiter |
| BR102019010579A2 (en) * | 2019-05-23 | 2020-12-01 | Fundação Universidade Federal Do Pampa | WATER SOLUTION CONTAINING EUPHORBIA TIRUCALLI EXTRACT AS NATURAL CORROSION INHIBITOR |
| CN111663143A (en) * | 2020-07-02 | 2020-09-15 | 重庆电力高等专科学校 | Acid-washing compound corrosion inhibitor for thermal equipment and preparation method thereof |
| CN115044909A (en) * | 2022-06-20 | 2022-09-13 | 郑州市新郑梅久实业有限公司 | Corrosion inhibitor for chemical pipeline |
Non-Patent Citations (1)
| Title |
|---|
| 易云莉;陈永强;陶艳;余梦;李向红;: "银杏叶提取物对冷轧钢在H_3PO_4溶液中的缓蚀性能", 清洗世界, no. 09, 30 September 2016 (2016-09-30), pages 30 - 34 * |
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