CN107573986B - Online maintenance protective agent for electric power and electrical equipment and preparation method and application thereof - Google Patents
Online maintenance protective agent for electric power and electrical equipment and preparation method and application thereof Download PDFInfo
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Abstract
The invention provides an on-line maintenance protective agent for power electrical equipment, which comprises organic sulfur nitrogen compounds, cross-linked silica gel liquid, corrosion inhibitors, surfactants, film forming agents, chelating agents, antioxidants, bi-component antirust agents, insulating agents, polyoxyethylene polyoxypropylene pentaerythritol ether, ethylene glycol monomethyl ether acetate, organic hydrocarbons and solvent naphtha. The protective agent has good various performances through the selection and the synergistic effect of specific components, can be used in the field of protection of power electrical equipment, does not need power failure operation, greatly improves the maintenance efficiency, does not cause any influence on downstream users, and has good application value and popularization potential.
Description
Technical Field
The invention relates to a protective agent and a preparation method and application thereof, in particular to an on-line maintenance protective agent for electric power equipment and a preparation method and application thereof, belonging to the technical field of maintenance for the electric power field.
Background
At present, with the increasing deterioration of the environment, the atmospheric pollution is increasingly serious, a large amount of dust, salt, oil stain, acid or alkaline gas, moist water vapor and other negative components exist in the atmosphere, especially in areas with serious pollution or local areas (such as workshops and the like) of factories and enterprises, and some special industries such as offshore operation, tunnel operation and the like, the negative influence is more serious, which often causes the electric power and electrical equipment to break down, such as fire, trip, local overheating, short circuit and the like, and not only brings serious danger and hidden danger, but also easily causes personnel injury accidents.
Therefore, in order to prevent the type of fault of the power electrical equipment, regular maintenance and maintenance are generally required to be performed on the power electrical equipment, a dirt layer deposited on the surface is removed, phenomena such as resistance reduction, leakage current increase or short circuit are prevented, and further, more serious accidents can be avoided.
In view of this, a great deal of intensive research has been carried out on the protection of electrical power equipment, and results have been obtained, such as:
CN1540681A discloses a Chinese character composed of16-25High boiling point alkane, C8-13The insulating protective agent comprises alkane, tetrachloroethylene, methyl silicone oil, isopropanol and a stabilizer, and can form a layer of protective film on the surface of electric power equipment, so that the effects of preventing electric leakage, preventing moisture, expelling damp and preventing corrosion are achieved, a condensation phenomenon and an ice crystal effect cannot be generated during protection, Ozone Depletion Substances (ODS) are not contained, the use is safe, and the insulating protective agent is an environment-friendly product with a good protection effect.
CN102690545A discloses a moisture-proof, corrosion-proof and insulating protective agent for electrical equipment and a preparation method thereof, wherein the moisture-proof, corrosion-proof and insulating protective agent comprises the following raw materials in percentage by weight: 20-50% of tetrachloroethylene, 1-10% of antirust agent, 0.1-1% of dehydrating agent, 0.5-2% of film-forming agent, 5-10% of transformer oil and the balance of hydrocarbon solvent. The moisture and humidity on the electric equipment can be removed by spraying the protective film on the electric equipment, and a semi-dry protective film is formed on the surface of the electric equipment, and the protective film does not obstruct the contact path. The protective film protects the electrical equipment from moisture and corrosive gas, can improve the insulation strength of the electrical equipment, has a withstand voltage of 20Kv or more, and can be operated and used in an equipment operation state. The water-repellent, moisture-proof and corrosion-proof electric equipment has the functions of water-repelling, moisture-proof and corrosion-proof and improving the insulation strength of the electric equipment by reasonably compounding the solvent, the dehydrating agent, the antirust agent, the film-forming agent and the like.
As described above, the prior art discloses reports of protective agents for electric power and electrical equipment, but to date, such studies have been relatively rare and the protective effect is desired to be further improved and improved. Therefore, the demand still exists for the on-line maintenance protective agent for the electric power equipment with excellent performance and the preparation method thereof, which are the research focus and the focus in the field at present and are the basis and the power for completing the invention.
Disclosure of Invention
In order to research and develop a novel on-line maintenance protective agent for electric power equipment and a preparation method and application thereof, the inventor obtains a brand-new on-line maintenance protective agent for electric power equipment and a preparation method and application thereof through intensive research after a large number of creative experiments are explored, and the protective agent has various good performances, thereby completing the invention.
Specifically, the present invention relates to the following aspects.
In a first aspect, the invention provides an on-line maintenance protective agent for electric power equipment, which comprises an organic sulfur nitrogen compound, a cross-linked silica gel liquid, a corrosion inhibitor, a surfactant, a film forming agent, a chelating agent, an antioxidant, a two-component antirust agent, an insulating agent, polyoxyethylene polyoxypropylene pentaerythritol ether, ethylene glycol monomethyl ether acetate, organic hydrocarbon and solvent oil.
The online maintenance protective agent for the power electrical equipment comprises the following specific components in parts by weight:
in the on-line maintenance protective agent for the power electrical equipment, the composition includes open type, including type, … type and the like.
In the on-line maintenance protective agent for electrical power equipment of the present invention, the organic sulfur nitrogen compound is 0.4 to 0.8 part by weight, for example, 0.4 part, 0.6 part or 0.8 part.
The organic sulfur nitrogen compound is an isothiazolinone compound selected from any one of 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, isothiazolin-3-one or 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one, and most preferably 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one.
The present inventors have found that various properties of the protective agent can be significantly improved by the use of the organic sulfur nitrogen compound, particularly, most preferably, the organic sulfur nitrogen compound, see the following property test.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the crosslinked silica gel liquid is 2-3 parts, for example, 2 parts, 2.5 parts or 3 parts.
The cross-linked silica gel liquid is prepared by the following preparation method:
(1) crushing kaolinite, and sieving with a 50-mesh sieve to obtain kaolinite powder; adding the kaolinite powder into 1-1.5mol/L NaOH aqueous solution, stirring and refluxing for 2-3 hours, and filtering while the solution is hot to obtain filtrate which is alkaline hydrolysis solution filtrate;
(2) adding the alkaline hydrolysis liquid filtrate into absolute ethyl alcohol, fully stirring and mixing for 40-50 minutes, and then standing overnight to obtain a gel liquid; filtering the gel liquid, fully washing the obtained jelly with deionized water for 3-4 times, and completely drying in vacuum to obtain gel;
(3) adding the gel into a mixture of silicone oil and dimethyl ether with the same volume, and stirring the mixture at the speed of 900-1000 r/min in a high-speed shearing machine at the temperature of 50-55 ℃ until the gel is completely dissolved, thus obtaining the cross-linked silicon gel liquid.
Wherein, in the step (1), the mass ratio of the kaolinite powder to the NaOH aqueous solution is 1:2-3, and can be 1:2, 1:2.5 or 1:3, for example.
Wherein, in the step (2), the mass ratio of the alkaline hydrolysis liquid filtrate to the absolute ethyl alcohol is 1:1.2-1.5, and can be 1:1.2, 1:1.3, 1:1.4 or 1:1.5, for example.
Wherein in the step (3), the ratio of the gel in grams (g) by mass to the equal volume mixture of the silicone oil and the dimethyl ether in milliliters (ml) by volume is 1:1.5-2.5, namely, every 1g of the gel is added to 1.5-2.5ml of the equal volume mixture of the silicone oil and the dimethyl ether, such as 1:1.5, 1:2 or 1: 2.5.
In the online maintenance protective agent for the power electrical equipment, the corrosion inhibitor is 0.3-0.7 part by weight, for example, 0.3 part, 0.5 part or 0.7 part.
The corrosion inhibitor is an imidazoline compound or a triazole compound.
Wherein the imidazoline compound is any one of 2- (pyridine-3-yl) -1-aminoethyl imidazoline, 2- (pyridine-3-yl) -1-benzyl imidazoline or 2- (pyridine-3-yl) -1-ethyl imidazoline;
wherein the triazole compound is any one of benzotriazole, 1-methylbenzotriazole or 1-hydroxymethylbenzotriazole.
The corrosion inhibitor is most preferably 2- (pyridin-3-yl) -1-benzylimidazoline.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the surfactant is 1-1.4 parts, for example, 1 part, 1.2 parts or 1.4 parts.
The surfactant is of a structural formula CxF2x+1CH2CH2O(C2H4O)yH, wherein x and y are independently selected from integers of 6-10.
The fluorinated alkyl ethoxy polyoxyethylene ether is a well-known conventional substance, and is commercially available from various sources, and is not described in detail herein.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the film forming agent is 0.2-0.5 part, for example, 0.2 part, 0.3 part, 0.4 part or 0.5 part.
The film former is 1-phenoxy-2-propanol or ethylene glycol butyl ether, most preferably 1-phenoxy-2-propanol.
In the on-line maintenance protective agent for the power electrical equipment, the chelating agent is 0.2 to 0.4 part by weight, for example, 0.2 part, 0.3 part or 0.4 part.
The chelating agent is diethylenetriamine pentaacetic acid.
In the on-line maintenance protective agent for the power electrical equipment, the antioxidant is 0.1-0.3 part by weight, for example, 0.1 part, 0.2 part or 0.3 part.
The antioxidant is any one of bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite, tert-butylhydroquinone or bis (octadecyl) pentaerythritol diphosphite, and most preferably bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite.
In the online maintenance protective agent for the power electrical equipment, the weight part of the two-component antirust agent is 0.5-0.9 part, for example, 0.5 part, 0.7 part or 0.9 part.
The double-component antirust agent is an equal-mass mixture of any one of 4- (N, N-dicyclohexyl) aminomethyl morpholine, diisopropylamine nitrite or dicyclohexylamine nitrite and N-oleoyl sarcosine octadecyl amine salt, wherein the most preferable mixture is the equal-mass mixture of 4- (N, N-dicyclohexyl) aminomethyl morpholine and N-oleoyl sarcosine octadecyl amine salt.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the insulating agent is 0.8-1.4 parts, for example, 0.8 part, 1 part, 1.2 parts or 1.4 parts.
The insulating agent is any one of polydimethylsiloxane, hexamethyl siloxane or octamethyl siloxane.
In the on-line maintenance protective agent for electric power equipment of the present invention, the polyoxyethylene polyoxypropylene pentaerythritol ether may be used in an amount of 0.4 to 0.6 parts by weight, for example, 0.4 parts, 0.5 parts, or 0.6 parts.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the ethylene glycol monomethyl ether acetate is 4-5 parts, for example, 4 parts, 4.5 parts or 5 parts.
In the on-line maintenance protective agent for the power electrical equipment, the weight part of the organic hydrocarbon is 20-30 parts, for example, 20 parts, 25 parts or 30 parts.
The organic hydrocarbon is C6-C8The saturated hydrocarbon compound may be, for example, n-hexane, n-heptane, n-octane or all of the isoparaffins of these three normal paraffins.
In the on-line maintenance protective agent for the power electrical equipment, the solvent oil is 50-60 parts by weight, for example, 50 parts, 55 parts or 60 parts.
The mineral spirit may be any one or a mixture of any more of 6# mineral spirit, 120# light mineral spirit, naphtha, 90# petroleum ether, etc. in any ratio, which are all very conventional substances and are commercially available from various commercial sources, and will not be described in detail herein.
As described above, the invention provides the on-line maintenance protective agent for the power electrical equipment, and the protective agent obtains various good performances through unique combination selection, a unique preparation method of certain components and effect synergy among the components, and has good application potential and industrial production prospect.
In a second aspect, the invention relates to a preparation method of the on-line maintenance protective agent for the power electrical equipment, which comprises the following steps:
s1, weighing each component for forming the on-line maintenance protective agent of the power electrical equipment respectively;
s2, adding organic sulfur nitrogen compounds, cross-linked silica gel liquid, corrosion inhibitors, film forming agents, antioxidants, bi-component antirust agents and insulating agents into organic hydrocarbons and ethylene glycol monomethyl ether acetate at room temperature, and then violently stirring until the materials are uniformly mixed to obtain a first mixed solution;
and S3, adding a surfactant, a chelating agent and polyoxyethylene polyoxypropylene pentaerythritol ether into the first mixed solution, heating to 40-50 ℃, stirring for 25-40 minutes, and naturally cooling to room temperature to obtain the on-line maintenance protective agent for the electric power equipment.
In a third aspect, the invention relates to the application of the on-line maintenance protective agent for the electric power equipment in the field of electric power equipment protection. The protective agent can realize online and uninterrupted protection of the electric power and electrical communication equipment, and has the advantages of time saving, labor saving, high efficiency, good effect and the like.
The specific cleaning operation, for example by spraying it by atomization, is conventional in the art and will not be described in detail here. Particularly, after the electric power and electric equipment is purchased and installed or cleaned and maintained immediately, the protective agent is sprayed, so that a longer next cleaning and maintaining time interval can be realized, the maintenance cost is greatly reduced, and the electric power and electric equipment has good application value.
As described above, the protective agent for online maintenance of the electric power equipment and the preparation method thereof provided by the invention have good various performances through selection and synergistic effect of specific components, can be used for protection of the electric power equipment, can greatly prolong the maintenance interval time between two times, greatly improves the maintenance efficiency, and has good application value and popularization potential.
Drawings
FIG. 1 is a Transmission Electron Micrograph (TEM) of the gel liquid obtained in step (2) of the preparation example of the present invention, from which it can be seen that the gel particles in the gel liquid have a particle size of 7 to 9nm and a highly uniform particle size distribution.
Detailed Description
The present invention is described in detail below by way of specific examples, but the use and purpose of these exemplary embodiments are merely to exemplify the present invention, and do not set forth any limitation on the actual scope of the present invention in any form, and the scope of the present invention is not limited thereto.
Of these, it is to be noted that the components added in steps S2 to S3 of the following respective examples and comparative examples are each the respective corresponding components in step S1.
Preparation example: preparation of crosslinked silica gel solutions
(1) Crushing kaolinite, and sieving with a 50-mesh sieve to obtain kaolinite powder; adding the kaolinite powder into 1.25mol/L NaOH aqueous solution with the mass 2.5 times of that of the kaolinite powder, stirring and refluxing for 2.5 hours, and filtering while the solution is hot to obtain filtrate which is alkaline hydrolysis solution filtrate;
(2) adding the alkaline hydrolysis solution filtrate into absolute ethyl alcohol (the mass ratio of the alkaline hydrolysis solution filtrate to the absolute ethyl alcohol is 1:1.35), fully stirring and mixing for 45 minutes, and then standing overnight to obtain a gel solution; filtering the gel liquid, fully washing the obtained jelly with deionized water for 3-4 times, and completely drying in vacuum to obtain gel;
(3) adding the gel into a mixture of silicone oil and dimethyl ether with equal volume (the ratio of the gel in grams (g) by mass to the mixture of the silicone oil and dimethyl ether with equal volume in milliliters (ml) by volume is 1:2), and stirring at the speed of 1000 revolutions per minute in a high-speed shearing machine at 53 ℃ until the gel is completely dissolved, thus obtaining the cross-linked silicone gel liquid.
In all of the following examples and comparative examples, the crosslinked silicone gel liquids used were the crosslinked silicone gel liquids obtained in the preparation examples.
Example 1: preparation of the protective agent
S1, respectively weighing 0.4 part by weight of organic sulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazoline-3-ketone, 3 parts by weight of cross-linked silica gel liquid, 0.3 part by weight of corrosion inhibitor 2- (pyridine-3-yl) -1-benzyl imidazoline and 1.4 parts by weight of surfactant (structural formula C)xF2x+1CH2CH2O(C2H4O)yH, fluorine-containing alkyl ethoxy polyoxyethylene ether, wherein x is 6, y is 10), 0.2 part by weight of film-forming agent 1-phenoxy-2-propanol, 0.4 part by weight of chelating agent diethylenetriamine pentaacetic acid, 0.1 part by weight of antioxidant bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate, 0.9 part by weight of bi-component antirust agent (equal mass mixture of 4- (N, N-dicyclohexyl) aminomethyl morpholine and N-oleoyl sarcosine octadecyl amine salt), 0.8 part by weight of insulating agent polydimethylsiloxane, 0.6 part by weight of polyoxyethylene polyoxypropylene pentaerythritol ether, 4 parts by weight of ethylene glycol monomethyl ether acetate, 30 parts by weight of organic hydrocarbon N-hexane and 50 parts by weight of solvent oil No. 6 solvent oil;
s2, adding the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent into the organic hydrocarbon and the ethylene glycol monomethyl ether acetate at room temperature, and then violently stirring until the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent are uniformly mixed to obtain a first mixed solution;
and S3, adding the surfactant, the chelating agent and the polyoxyethylene polyoxypropylene pentaerythritol ether into the first mixed solution, heating to 40 ℃, stirring for 40 minutes, and naturally cooling to room temperature to obtain the on-line maintenance protective agent for the electric power equipment, wherein the name of the on-line maintenance protective agent is B1.
Example 2: preparation of the protective agent
S1, respectively weighing 0.8 part by weight of organic sulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazoline-3-ketone, 2 parts by weight of cross-linked silica gel liquid and 0.7 part by weight of corrosion inhibitor 2- (pyridine-3)-radical) -1-benzyl imidazoline, 1 weight part of surfactant (structural formula is C)xF2x+1CH2CH2O(C2H4O)yH, fluorine-containing alkyl ethoxy polyoxyethylene ether, wherein x is 10, y is 6), 0.5 part by weight of film-forming agent 1-phenoxy-2-propanol, 0.2 part by weight of chelating agent diethylenetriamine pentaacetic acid, 0.3 part by weight of antioxidant bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate, 0.5 part by weight of bi-component antirust agent (equal mass mixture of 4- (N, N-dicyclohexyl) aminomethyl morpholine and N-oleoyl sarcosine octadecyl amine salt), 1.4 parts by weight of insulating agent hexamethyl siloxane, 0.4 part by weight of polyoxyethylene polyoxypropylene pentaerythritol ether, 5 parts by weight of ethylene glycol monomethyl ether acetate, 20 parts by weight of organic hydrocarbon N-hexane and 60 parts by weight of solvent oil # 120 light solvent oil;
s2, adding the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent into the organic hydrocarbon and the ethylene glycol monomethyl ether acetate at room temperature, and then violently stirring until the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent are uniformly mixed to obtain a first mixed solution;
and S3, adding the surfactant, the chelating agent and the polyoxyethylene polyoxypropylene pentaerythritol ether into the first mixed solution, heating to 50 ℃, stirring for 25 minutes, and naturally cooling to room temperature to obtain the on-line maintenance protective agent for the electric power equipment, wherein the name of the on-line maintenance protective agent is B2.
Example 3: preparation of the protective agent
S1, respectively weighing 0.6 part by weight of organic sulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazoline-3-ketone, 2.5 parts by weight of cross-linked silica gel liquid, 0.5 part by weight of corrosion inhibitor 2- (pyridine-3-yl) -1-benzyl imidazoline and 1.2 parts by weight of surfactant (structural formula is C)xF2x+1CH2CH2O(C2H4O)yH fluorine-containing alkyl ethoxy polyoxyethylene ether, wherein x is 8, y is 8), 0.35 part by weight of film-forming agent 1-phenoxy-2-propanol, 0.3 part by weight of chelating agent diethylenetriamine pentaacetic acid, 0.2 part by weight of antioxidant bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate, 0.7 part by weight of bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphateComponent rust inhibitor (equal mass mixture of 4- (N, N-dicyclohexyl) aminomethyl morpholine and N-oleoyl sarcosine octadecyl amine salt), 1.1 weight parts of insulating agent octamethyl siloxane, 0.5 weight parts of polyoxyethylene polyoxypropylene pentaerythritol ether, 4.5 weight parts of ethylene glycol monomethyl ether acetate, 25 weight parts of organic hydrocarbon N-hexane and 55 weight parts of solvent naphtha;
s2, adding the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent into the organic hydrocarbon and the ethylene glycol monomethyl ether acetate at room temperature, and then violently stirring until the organic sulfur nitrogen compound, the cross-linked silica gel liquid, the corrosion inhibitor, the film forming agent, the antioxidant, the two-component antirust agent and the insulating agent are uniformly mixed to obtain a first mixed solution;
and S3, adding the surfactant, the chelating agent and the polyoxyethylene polyoxypropylene pentaerythritol ether into the first mixed solution, heating to 45 ℃, stirring for 35 minutes, and naturally cooling to room temperature to obtain the on-line maintenance protective agent for the electric power equipment, wherein the name of the on-line maintenance protective agent is B3.
Comparative examples 1 to 9: preparation of D1-D9
Comparative examples 1 to 3: comparative examples 1-3 were obtained by changing the organosulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one of examples 1-3 to 2-methyl-4-isothiazolin-3-one, respectively, without changing the other operations, and the resulting protective agents were sequentially named as D1, D2 and D3.
Comparative examples 4 to 6: comparative examples 4-6 were obtained by changing the organosulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one of examples 1-3 to 5-chloro-2-methyl-4-isothiazolin-3-one, respectively, without changing the other operations, and the resulting protective agents were named D4, D5 and D6 in this order.
Comparative examples 7 to 9: comparative examples 7 to 9 were obtained by changing the organosulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one of examples 1 to 3 to isothiazolin-3-one, respectively, and the resulting protective agents were named D7, D8 and D9 in this order.
Comparative examples 10 to 14: preparation of D10-D14
Examples 1-3 were repeated except that the corrosion inhibitor 2- (pyridin-3-yl) -1-benzylimidazoline was replaced with the other corrosion inhibitors of Table 1 below, thus obtaining comparative examples 10-14, the corrosion inhibitors used, the correspondence and the resulting protectant nomenclature being shown in Table 1 below:
TABLE 1
Comparative examples 15 to 17: preparation of D15-D17
Comparative examples 15-17 were obtained by replacing the film-forming agent 1-phenoxy-2-propanol of examples 1-3 with butyl glycol ether, respectively, and the resulting protective agents were designated as D15, D16, and D17 in that order.
Comparative examples 18 to 23: preparation of D18-D23
Comparative examples 18 to 20: comparative examples 18-20 were obtained by replacing the antioxidant bis (2, 4-di-t-butylphenyl) pentaerythritol diphosphate in examples 1-3 with t-butylhydroquinone, respectively, and the resulting protectors were named D18, D19 and D20 in this order.
Comparative examples 21 to 23: comparative examples 21 to 23 were obtained by replacing the antioxidant bis (2, 4-di-t-butylphenyl) pentaerythritol diphosphite in examples 1 to 3 with bis (octadecyl) pentaerythritol diphosphite, respectively, and the resulting protectors were named D21, D22 and D23 in this order.
Comparative examples 24 to 29: preparation of D24-D29
Comparative examples 24 to 26: comparative examples 24 to 26 were obtained by changing 4- (N, N-dicyclohexyl) aminomethylmorpholine in the two-component rust preventives of examples 1 to 3 to diisopropylamine nitrite, respectively, without changing the other operations, and the obtained protectors were named D24, D25 and D26 in this order.
Comparative examples 27 to 29: comparative examples 27 to 29 were obtained by changing 4- (N, N-dicyclohexyl) aminomethylmorpholine in the two-component rust preventives of examples 1 to 3 to dicyclohexylamine nitrite, respectively, without changing the other operations, and the obtained protectors were named D27, D28 and D29 in this order.
Comparative examples 30 to 32: preparation of D30-D32
Comparative examples 30 to 32 were obtained by omitting the organic sulfur nitrogen compound 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one from examples 1 to 3, respectively, and designating the resulting protective agents as D30, D31 and D32 in that order.
Comparative examples 33 to 35: preparation of D33-D35
Comparative examples 33 to 35 were obtained by omitting the crosslinked silica gel liquids of examples 1 to 3, respectively, and designating the obtained protective agents as D33, D34 and D35 in this order.
Comparative examples 36 to 41: preparation of D36-D41
Comparative examples 36 to 38: comparative examples 36-38 were obtained by replacing the two-component rust inhibitors of examples 1-3 with the same amount of the single component, 4- (N, N-dicyclohexyl) aminomethylmorpholine, respectively, and the other operations were not changed, and the obtained protective agents were named D36, D37, and D38 in this order.
Comparative examples 39 to 41: comparative examples 39 to 41 were obtained by replacing the two-component rust preventives of examples 1 to 3 with the same amount of the single-component octadecylamine salt of N-oleoyl sarcosinate, respectively, and the other operations were not changed, and the obtained protectors were named D39, D40 and D41 in this order.
Performance testing
The protective agents obtained in the above examples and comparative examples were measured for various performance indexes immediately after the preparation, and the results are as follows.
1. Electrical Performance testing
Insulation resistance, pollution flashover voltage and breakdown voltage were measured for electrical properties, and the measurement methods for these indices are well-known methods and will not be described in detail herein, and the results are shown in table 2 below.
TABLE 2
It can be seen from this that: 1. the protective agent B1-B3 has very excellent electrical properties; 2. when the organic sulfur nitrogen compound was changed or omitted, the electrical properties were reduced (D1-D9) or even significantly reduced (D30-D32), which proved that the selection of the kind and the necessity of use thereof were not obvious; 3. when the type of film forming agent is changed, a significant decrease in electrical properties (D15-D17) is caused, especially the breakdown voltage is the lowest, which should be the decrease in film forming properties, so that the electrical properties are decreased; 4. when the cross-linked silica gel is omitted, the electrical property degradation is very significant, especially the insulation voltage and the pollution flashover voltage are the lowest (D33-D35), which should be a uniform distribution of the cross-linked silica gel, greatly improving the insulation ability and the pollution flashover resistance.
2. Guard interval time testing
Taking a transformer outdoors in an oil refinery with a severe environment as an example, after the transformer is thoroughly and completely cleaned, a plurality of protective agents of the present invention are sprayed in the same operation in equal amount (each protective agent can be sprayed on one transformer, or different protective agents can be sprayed on different areas of one transformer) immediately, and then the transformer is normally used, and the surface fouling deposition condition of the transformer is observed at different periods, as shown in table 3 below.
TABLE 3
Wherein the "+ + +" stage indicates a small amount of fouling deposition, the "+" stage indicates a small amount of fouling deposition, and the "+" stage indicates a significant amount of fouling deposition, i.e. the order of the amount of fouling deposition from large to small is: a "+ + +" -stage, a "+" -stage, and a "+" stage.
It can be seen from this that: 1. the protective agent B1-B3 has excellent antifouling deposition performance, and the fouling amount is in a grade of "+ +" at 24 months in a highly polluted environment; 2. when the organic sulfur nitrogen compounds were changed or omitted, scale deposition of "+ +" grade had occurred at month 12; 3. when the variety of film forming agents is changed, dirt deposition of a plus grade level is already generated at the 12 th month, and dirt deposition is very obvious at the 24 th month, which proves that the 1-phenoxy-2-propanol has the best film forming property, can promote each component to effectively form a surface antifouling film and prevent dirt deposition; 4. when the cross-linked silicone gel was omitted, soil deposition of the "+" scale had occurred at month 12 and was very significant at month 24, demonstrating that the presence of the cross-linked silicone gel improves the surface soil resistance of the protective film formed by the protective agent.
3. Storage stability test
After the preparation is finished, each initial protective agent presenting light amber color is sealed, the protective agent is stored in a dark place at normal temperature, the existence form of the protective agent is observed by eyes every 2 days, the storage stability of each protective agent is investigated, and the results show that:
A. B1-B3 was a clear, light amber, homogeneous liquid at 150 days, with excellent storage stability.
B. On day 128, D1-D9 showed some flocs at the bottom.
C. D10-D17, D24-D29 and D36-D41 were clear, homogeneous liquids at 150 days, but the color was slightly darker.
D. D18-D23 were still clear, homogeneous liquids at 150 days, but were darker in color than group C.
E. At day 100, D30-D32 showed a few bottom floes, while at day 136, the floes increased significantly and were a dark color similar to group D.
F. D33-D35 remained a clear, light amber, homogeneous liquid at 150 days. This demonstrates equally excellent storage stability, but as described in the above examination of the electrical properties and the protection time, these two properties are significantly reduced from those of B1-B3, which demonstrates their indispensable properties in the protective agent of the invention.
4. Corrosivity test
The corrosion of plastics and metals (copper, iron and tin, respectively) by the protective agents obtained in the above examples and comparative examples was tested according to the corrosion test carried out in accordance with standard JB/T4323.2, the results of which are given in Table 4 below.
TABLE 4
Wherein the severity of the "micro-corrosion" is stronger than the "micro-corrosion".
It can be seen that when the components of the corrosion inhibitor, the antioxidant and the antirust are changed, slight corrosion to metal is caused; when the dual-component antirust agent is replaced by the single-component antirust agent, the corrosion degree is increased, which proves that the two components can exert a synergistic effect mutually and can obtain excellent anti-corrosion performance.
As described above, the protective agent for online maintenance of the electric power equipment and the preparation method thereof provided by the invention have good various performances through selection and synergistic effect of specific components, can be used in the field of protection of the electric power equipment, does not need power failure operation, greatly improves the maintenance efficiency, does not cause any influence on downstream users, and has good application value and popularization potential.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should also be understood that various alterations, modifications and/or variations can be made to the present invention by those skilled in the art after reading the technical content of the present invention, and all such equivalents fall within the protective scope defined by the claims of the present application.
Claims (3)
1. The utility model provides an electric power electrical equipment online maintenance protective agent which characterized in that: the antirust coating comprises organic sulfur nitrogen compounds, cross-linked silica gel liquid, corrosion inhibitors, surfactants, film forming agents, chelating agents, antioxidants, double-component antirust agents, insulating agents, polyoxyethylene polyoxypropylene pentaerythritol ether, ethylene glycol monomethyl ether acetate, organic hydrocarbons and solvent oil;
the power electrical equipment on-line maintenance protective agent comprises the following specific components in parts by weight:
the organic sulfur nitrogen compound is 4, 5-dichloro-2-n-octyl-4-isothiazoline-3-ketone;
the cross-linked silica gel liquid is prepared by the following preparation method:
(1) crushing kaolinite, and sieving with a 50-mesh sieve to obtain kaolinite powder; adding the kaolinite powder into 1-1.5mol/L NaOH aqueous solution, stirring and refluxing for 2-3 hours, and filtering while the solution is hot to obtain filtrate which is alkaline hydrolysis solution filtrate;
(2) adding the alkaline hydrolysis liquid filtrate into absolute ethyl alcohol, fully stirring and mixing for 40-50 minutes, and then standing overnight to obtain a gel liquid; filtering the gel liquid, fully washing the obtained jelly with deionized water for 3-4 times, and completely drying in vacuum to obtain gel;
(3) adding the gel into a mixture of silicone oil and dimethyl ether with the same volume, and stirring the mixture at the speed of 900-1000 r/min in a high-speed shearing machine at the temperature of 50-55 ℃ until the gel is completely dissolved, thus obtaining the crosslinked silicon gel liquid;
the corrosion inhibitor is 2- (pyridine-3-yl) -1-benzyl imidazoline;
the surfactant is of a structural formula CxF2x+1CH2CH2O(C2H4O)yH, fluorine-containing alkyl ethoxy polyoxyethylene ether, wherein x and y are independently selected from integers of 6-10;
the film forming agent is 1-phenoxy-2-propanol;
the chelating agent is diethylenetriamine pentaacetic acid;
the antioxidant is bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphate;
the bi-component antirust agent is an equal-mass mixture of 4- (N, N-dicyclohexyl) aminomethyl morpholine and N-oleoyl sarcosine octadecyl amine salt.
2. The method for preparing the on-line maintenance protective agent for the power electrical equipment as claimed in claim 1, which comprises the following steps:
s1, weighing each component for forming the on-line maintenance protective agent of the power electrical equipment respectively;
s2, adding organic sulfur nitrogen compounds, cross-linked silica gel liquid, corrosion inhibitors, film forming agents, antioxidants, bi-component antirust agents and insulating agents into organic hydrocarbons and ethylene glycol monomethyl ether acetate at room temperature, and then violently stirring until the materials are uniformly mixed to obtain a first mixed solution;
and S3, adding a surfactant, a chelating agent and polyoxyethylene polyoxypropylene pentaerythritol ether into the first mixed solution, heating to 40-50 ℃, stirring for 25-40 minutes, and naturally cooling to room temperature to obtain the on-line maintenance protective agent for the electric power equipment.
3. Use of the on-line maintenance protective agent for electric power equipment of claim 1 in the field of electric power equipment protection.
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| CN1292833A (en) * | 1998-02-18 | 2001-04-25 | 新日本制铁株式会社 | Anticorrosive coating material and method of rust prevention |
| CN102690545A (en) * | 2012-06-14 | 2012-09-26 | 华阳新兴科技（天津）集团有限公司 | Electric equipment moisture resistance, corrosion resistance and insulation protection agent and preparation method thereof |
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| CN1292833A (en) * | 1998-02-18 | 2001-04-25 | 新日本制铁株式会社 | Anticorrosive coating material and method of rust prevention |
| CN102690545A (en) * | 2012-06-14 | 2012-09-26 | 华阳新兴科技（天津）集团有限公司 | Electric equipment moisture resistance, corrosion resistance and insulation protection agent and preparation method thereof |
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