CN110284141B - Gas phase rust inhibitor and slow-release gas phase rust-inhibiting capsule containing same - Google Patents
Gas phase rust inhibitor and slow-release gas phase rust-inhibiting capsule containing same Download PDFInfo
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- CN110284141B CN110284141B CN201910622748.8A CN201910622748A CN110284141B CN 110284141 B CN110284141 B CN 110284141B CN 201910622748 A CN201910622748 A CN 201910622748A CN 110284141 B CN110284141 B CN 110284141B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
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Abstract
The invention discloses a gas-phase rust inhibitor and a slow-release gas-phase rust-inhibiting capsule containing the same. The gas-phase rust inhibitor comprises a rust inhibitor component, polyvinyl alcohol and a solvent according to the weight ratio of (60-70) - (10-20), wherein the rust inhibitor component comprises 40-50 parts of first aliphatic amino acid, 20-25 parts of organic amine, 5-10 parts of second amino acid alkyl ester and 5-20 parts of benzoate. The gas phase rust-resisting diaphragm of the diaphragm capsule with the slow release function is matched with the gas phase rust inhibitor provided by the invention for use, so that volatile gas phase rust-resisting components are slowly volatilized and are uniform, corrosion inhibition can be carried out for a long time, the service life of the diaphragm capsule is further prolonged on the basis of ensuring the rust resistance, the frequency of dressing change is reduced, and the diaphragm capsule is simple in appearance and can be recycled.
Description
Technical Field
The invention belongs to the field of metal rust-resisting materials, and particularly relates to a gas-phase rust inhibitor and a slow-release gas-phase rust-resisting diaphragm capsule containing the same.
Background
With the implementation of the intelligent power grid plan of the national power grid company, a transformer substation develops into an intelligent transformer substation, primary equipment needs to be upgraded into intelligent power equipment, and secondary equipment becomes an intelligent control unit, so that the realization of the large integration of primary and secondary equipment enterprises is a revolutionary change. However, the problem of corrosion inside electrical equipment is endless, and especially in an electrical cabinet with intelligent electrical equipment, the problem of corrosion once becomes one of the bottlenecks that hinder the development of a smart grid. Under the great revolution, the problem of preventing and controlling the corrosion of metal parts inside power distribution network equipment is an important subject in the development process of the smart power grid, and has non-negligible influence on the service life and the safe operation of the equipment.
The anticorrosion paint is one of the traditional methods which are widely applied and most representative, but the preparation and coating processes can cause environmental pollution, the probability of generating problems such as missing coating and needle holes is very high, missing points are easy to corrode, the long-term use effect is greatly influenced, and even if the missing points appear in a switch-on/off switch or a microswitch, the generated damage and loss can not be estimated. The technology of metal coating rust resistance has been used for over a hundred years, and forms a protective layer on the surface of various easily oxidized metal devices by the principles of anodic dissolution and cathodic adsorption. The disadvantages become more and more obvious with the expansion of the application field of the electroplating technology, and especially, the problem that the rust-resisting effect is affected by uneven thickness, easy generation of cracks and the like caused by the thin thickness (about 8 μm) of the metal coating becomes an obstacle for further development of the coating rust-resisting technology.
The gas phase rust inhibitor is a new high-efficiency and economic metal rust-inhibiting means. The gas-phase antirust agent can automatically volatilize antirust molecules or groups at normal temperature, and the antirust molecules or groups form a protective layer on the surface of metal in a physical or chemical mode, so that the aim of inhibiting the metal corrosion is fulfilled.
The patent CN201910025513.0 discloses a gas phase rust inhibitor, a preparation method thereof and an application thereof in building corrosion protection, which comprises a rust inhibitor component and a solvent, wherein the weight ratio of the rust inhibitor component to the solvent is (50-60): (40-50), the solvent comprises an organic solvent and an inorganic solvent, and the rust inhibitor component comprises the following raw materials in parts by weight: 45-50 parts of aliphatic amino acid, 20-25 parts of triethanolamine, 3-5 parts of benzotriazole and 25-30 parts of sodium benzoate. Patent CN201610655887.7 discloses a composite gas-phase rust inhibitor and a preparation method of a gas-phase rust-inhibiting plastic film, which is composed of polyaniline 20-40% by mass, organic amine salt 20-40% by mass, and benzoate 20-40% by mass. The vapor phase rust inhibitors disclosed in the above patents are volatile organic compounds, and the rust inhibiting effect is maintained by the volatile vapor phase rust inhibitor component having rust inhibiting activity. However, the above patents do not have a regulation or slow release measure for the rust inhibitor, and the active ingredients of the rust inhibitor volatilize too fast, and the volatilization process is uncontrollable, so that the rust inhibitor volatilizes in a short period, and the expensive rust inhibitor needs to be continuously supplemented, which is not beneficial to saving the cost, and the time and labor are wasted when the rust inhibitor is replaced. Therefore, the development of a rust inhibitor product capable of maintaining the rust inhibitor to exert a rust inhibiting effect for a long time is urgently needed.
Disclosure of Invention
The invention aims to solve the problem of corrosion of metal parts in power distribution network equipment and overcome the defects of the conventional rust inhibitor, provides the rust inhibitor which is slow and uniform in volatilization of gas-phase rust inhibiting components and can inhibit corrosion for a long time, and uses a slow-release gas-phase rust inhibiting membrane box containing the rust inhibitor to protect the interior of the power distribution network equipment.
In order to achieve the purpose, the invention adopts the following technical scheme:
a gas-phase rust inhibitor comprises a rust inhibitor component, polyvinyl alcohol and a solvent according to the weight ratio of (60-70) to (10-20), wherein the rust inhibitor component comprises the following raw materials in parts by weight: 40-50 parts of first aliphatic amino acid, 20-25 parts of organic amine, 5-10 parts of second amino acid alkyl ester and 5-20 parts of benzoate.
Preferably, the weight average molecular weight of the polyvinyl alcohol is 1000-2000; and/or the solvent is a mixed solvent of alcohol and water in a weight ratio of (10-15): (85-90), and the alcohol solvent is preferably at least one of methanol, ethanol, propanol, butanol, pentanol and hexanol.
Preferably, the first aliphatic amino acid is one or more of beta-alanine, glycine, glutamic acid, asparagine or glutamine; and/or the organic amine is one or more of triethanolamine, isopropylamine, diethylamine, cyclohexylamine, octylamine, ethylenediamine, divinyltriamine and trivinyltetramine; and/or the amino acid alkyl ester is at least one of a second aliphatic amino acid alkyl ester and an aromatic amino acid alkyl ester, and the alkyl ester is an alkyl ester with 1-10 carbon atoms, preferably a tertiary alkyl ester with 4-7 carbon atoms; and/or the benzoate is any one or a mixture of more of sodium benzoate, potassium benzoate and ammonium benzoate.
Preferably, the amino acid moiety of the second aliphatic amino acid alkyl ester is selected from glycine, α -alanine, cysteine (cysteine), cystine (cysteine disulfide), lysine, alginic acid, glutamic acid, β -alanine or γ -aminobutyric acid; and/or the amino acid portion of the aromatic amino acid alkyl ester is selected from tryptophan, proline or hydroxyproline.
The preparation method of the gas phase rust inhibitor comprises the following steps:
(1) mixing amino acid alkyl ester and alcohol solvent in proportion, and stirring uniformly;
(2) mixing polyvinyl alcohol, first aliphatic amino acid and benzoate with water in proportion, and uniformly stirring;
(3) and (3) weighing organic amine according to a proportion, and mixing the organic amine with the mixture obtained in the step (1) and the step (2) to obtain the gas-phase rust inhibitor.
A slow-release gas-phase rust resisting capsule containing a gas-phase rust inhibitor comprises: the capsule comprises a capsule body with a gas phase rust-resisting diaphragm and the gas phase rust inhibitor arranged in the capsule body.
The material and shape of the capsule body are not particularly limited, as long as the capsule body can form a certain space for storing the rust inhibitor, the material can be metal, plastic, wood, etc., as long as the gas phase rust inhibitor component volatilized by the rust inhibitor cannot permeate out of the material of the capsule.
Preferably, the vapor phase rust inhibiting separator includes: a base layer coated with a non-woven fabric including polyvinylidene fluoride;
a waterproof gas barrier layer with a microporous structure having a pore diameter of 0.05-0.15 μm and a porosity of 30-80%,
bubble point pressure of 5-20KPa, gas phase rust-resisting component transmittance of 4-5g/m2·d；
The gas phase rust inhibitor is organic gas with rust inhibiting effect volatilized by the rust inhibitor.
Preferably, the thickness of the gas phase rust-resisting diaphragm is 100-450 μm, preferably 250-300 μm; and/or the non-woven fabric is filament or staple fiber; and/or the porosity of the waterproof gas barrier layer is 55-65%, the bubble point pressure is 15-20KPa, and the gas phase rust-resisting component transmittance is 4.21-4.8g/m2·d。
Preferably, the gas phase rust-resisting diaphragm is obtained by a preparation method comprising the following steps:
dissolving polyvinylidene fluoride in an organic solvent, stirring, heating in a water bath, preserving heat, adding an additive containing polyvinylpyrrolidone and 2-mercaptoethanol, standing, and realizing complete defoaming to obtain a precursor solution;
and (2) pouring the precursor solution obtained in the step (1) on non-woven fabric to form a film, firstly, soaking the film in flowing water, rolling, then, soaking in water, taking out, and airing to obtain the gas phase rust-resisting diaphragm.
The invention also provides the application of the slow-release gas-phase rust resisting capsule, which is used for protecting metal parts in power grid equipment. The dosage of the gas phase rust inhibitor and the area of the gas phase rust-resisting diaphragm are determined according to the size of the internal space of the equipment needing rust resistance and the rust-resisting time.
Compared with the prior art, the slow-release gas-phase rust-resisting film box adopting the gas-phase rust inhibitor provided by the invention has the following beneficial effects:
1. the slow-release gas-phase rust-resisting diaphragm capsule prepared by the invention has a slow-release gas-phase rust-resisting diaphragm, so that volatile gas-phase rust-resisting components are slowly and uniformly volatilized, the rust-resisting components are dispersed in the air, a protective layer can be supplemented for metal at any time, and the slow-release gas-phase rust-resisting diaphragm capsule has a long-term corrosion inhibition effect.
2. The inventor unexpectedly found that the addition of a certain amount of polyvinyl alcohol to the gas phase rust inhibitor can adjust and control the volatilization rate of the gas phase rust inhibitor, so that the release of the gas phase volatile components is more durable and uniform.
3. The gas-phase rust inhibitor provided by the invention is a compound of various rust inhibitors, comprises a plurality of high electronegativity heteroatoms N, O, functional groups of ester groups and carboxyl groups, is favorable for nucleophilic chemical adsorption of molecules on metals on the metal surface to form chelates, the chelates form molecular protection layers and are dynamically adsorbed on the metal surface, and finally a metastable structure is formed, so that the metals can be protected for a long time and can be prevented from being rusted. And the proper proportion of the compound rust inhibitor is screened out, so that the effective rust inhibitor component volatilized by the rust inhibitor in a long time is continuously and stably, and the volatilization rate is kept in a relatively constant range.
4. The gas-phase rust-resisting film box further prolongs the service life of the slow-release gas-phase rust-resisting film box on the basis of ensuring rust resistance, reduces the frequency of changing the medicine and saves the labor cost. In addition, the slow-release gas-phase rust-resisting capsule is safe, environment-friendly and simple in appearance, can be placed in power grid equipment, does not need complex operation, and can be recycled.
Detailed Description
The invention is further explained by combining with the specific embodiment, the distribution network equipment related to the specific implementation process is an electrical cabinet, and the weight-average molecular weight of the polyvinyl alcohol used is 1800.
Reference is made to the applicant's prior application No. CN201910530135.1 for a gas phase rust barrier membrane and its preparation as used in the examples of the present invention.
The vapor phase rust inhibiting separator includes:
a base layer coated with a non-woven fabric including polyvinylidene fluoride;
a waterproof gas barrier layer having a microporous structure with a pore diameter of 0.13 μm and a porosity of 63.4%,
the bubble point pressure was 17.5KPa, and the gas phase rust inhibitor transmittance was 4.75g/m2·d；
The gas phase rust inhibitor is organic gas with rust inhibiting effect volatilized by the rust inhibitor.
The thickness of the film was 250 μm; the non-woven fabric is staple fiber; the porosity of the water-repellent gas barrier layer was 63.5%.
The preparation method of the gas phase rust-resisting diaphragm comprises the following steps:
(1) dissolving 20-40 parts by weight of polyvinylidene fluoride in 50-150 parts by weight of dimethylformamide, stirring for 5-12 hours, heating in a water bath for 30-40 ℃, keeping the temperature of the water bath constant for 1.5-5 hours to form a stable mixed solution, adding 3-7 parts by weight of an additive, wherein the additive contains polyvinylpyrrolidone and 2-mercaptoethanol, the mass percentage of the 2-mercaptoethanol in the additive is 2-15 wt%, and standing for 2-6 hours to realize complete defoaming to obtain a film liquid precursor; preferred additives are polyethylene glycol, ethanol, polyvinylpyrrolidone, polymethyl (meth) acrylate and 2-mercaptoethanol in a weight ratio of 33-48:8-15:15-25:5-40: 4-7.
(2) Pouring the film liquid precursor obtained in the step (1) on a non-woven fabric, scraping a liquid film by using a scraper to form a film with the thickness of 100-450 mu m, soaking the film in flowing water with the water temperature of 20-30 ℃ and the water speed of 2-10m/min for 5-15min, rolling, soaking in water with the temperature of 25-35 ℃ for 12-36h, taking out, and airing for 1-3d to obtain the film with the gas phase rust resistance, wherein the thickness of the film is about 100-450 mu m.
The preparation method of the amino acid alkyl ester comprises the following steps:
mixing 0.8-1mol of amino acid and 1.2-3mol of concentrated hydrochloric acid, reacting at 20-80 ℃ for 0.5-8h to obtain amino acid hydrochloride, adding 1.2-3mol of tertiary alcohol, introducing hydrogen chloride gas, performing esterification reaction at 45-90 ℃ for 2-8h, filtering, washing and drying to obtain the pure product of the tertiary alkyl amino acid ester. The amino acid can be glycine, alpha-alanine, cysteine (cysteine sulfydryl alanine), cystine (disulfo alanine), lysine, alginic acid, glutamic acid, beta-alanine, gamma-butyric acid, tryptophan, proline or hydroxyproline, and the tertiary alcohol can be tertiary alcohol with 4-7 carbon atoms. The amino acid is esterified with a tertiary alcohol in order to prevent polycondensation between alcohols, and the resulting tertiary alkyl amino acid ester exhibits a long-lasting gas-phase corrosion inhibition effect.
In the embodiment of the invention, the amino acid alkyl ester adopts the tert-butyl aminoacetate, so that the influence of other rust-resisting components on the rust-resisting effect can be conveniently researched, and other amino acid alkyl ester rust inhibitors can generate similar technical effects, so that the specific amino acid alkyl ester, namely the tert-butyl aminoacetate, is not understood to limit the protection scope of the invention, and other amino acid alkyl ester rust inhibitors can play the same role. The same applies to the aliphatic amino acid, organic amine corrosion inhibitor and benzoate corrosion inhibitor used in the examples, and although specific corrosion inhibitors are used in the following specific examples, they should not be construed as limiting the scope of the present invention, and corrosion inhibitors having similar structures and the same functions in the art are within the scope of the present invention.
Preparation of vapor phase Corrosion inhibitor
Preparation example 1
The formula is as follows:
the gas phase rust inhibitor consists of 60 parts of rust inhibiting components, 15 parts of polyvinyl alcohol and 20 parts of solvent;
the rust-resisting component comprises glutamic acid, triethanolamine, tert-butyl aminoacetate and sodium benzoate with the weight ratio of 40:25:5: 15;
the solvent is a mixed solvent of ethanol and water, and the weight ratio is 15: 85.
The preparation method comprises the following steps:
(1) weighing amino acid alkyl ester, adding into ethanol, stirring and mixing uniformly;
(2) adding polyvinyl alcohol, glutamic acid and sodium benzoate into water according to a certain proportion, stirring and mixing uniformly;
(3) mixing the mixture obtained in the step (1) and the step (2) until the mixture is uniform;
(4) and (4) weighing triethanolamine, adding the triethanolamine into the mixture obtained in the step (3), and mixing to finally obtain the required gas phase rust inhibitor.
Preparation example 2
The rest is the same as the preparation example 1, except that the rust-resisting components of the formula are glutamic acid, triethanolamine, tert-butyl aminoacetate and sodium benzoate in a weight ratio of 45:20:8: 20.
Preparation example 3
The rest is the same as the preparation example 1, except that the rust-resisting components in the formula comprise glutamic acid, triethanolamine, tert-butyl aminoacetate and sodium benzoate in a weight ratio of 50:23:10: 15.
Comparative preparation example 1
The rest is the same as the preparation example 1, except that the rust-resisting components of the formula are glutamic acid, triethanolamine and sodium benzoate in a weight ratio of 40:20: 15.
Comparative preparation example 2
Otherwise the same as in preparation 1, except that the rust inhibitor in the formulation comprises triethanolamine, t-butyl carbamate and sodium benzoate in a weight ratio of 25:5: 15.
Preparation example 4
The other points are the same as preparation example 2, except that the gas phase rust inhibitor in the formulation consists of 60 parts of rust inhibitor, 10 parts of polyvinyl alcohol and 20 parts of solvent.
Preparation example 5
The other points are the same as preparation example 2, except that the gas phase rust inhibitor in the formulation consists of 60 parts of rust inhibitor, 20 parts of polyvinyl alcohol and 20 parts of solvent.
Preparation example 6
The other points are the same as in preparation example 2 except that the gas phase rust inhibitor in the formulation consists of 60 parts of a rust inhibitor component, 25 parts of polyvinyl alcohol and 20 parts of a solvent.
Preparation example 7
Otherwise as in preparation 2, except that glutamic acid was replaced by glycine in the rust inhibiting composition in the formulation.
Comparative preparation example 3
The rest is the same as preparation example 2 except that the gas phase rust inhibitor in the formulation consists of 60 parts of rust inhibitor component and 20 parts of solvent.
Example Assembly of sustained Release gas phase Rust resistant Capsule
The gas phase rust inhibitor prepared by the preparation examples 1-7 and the comparative preparation examples 1-3 is assembled into a slow-release gas phase rust inhibitor diaphragm box, the sizes of the diaphragm and the body are cuboids of 4cm multiplied by 3cm, the top or the side surface of the diaphragm box is provided with an opening, the opening area can be regulated and controlled according to the area of a gas phase rust inhibitor diaphragm, and the opening area is generally slightly smaller than the area of the gas phase rust inhibitor diaphragm. In the embodiment of the invention, the addition amount of the rust inhibitor is 7g, and the area of the gas phase rust-resisting diaphragm is 10cm2The slow-release gas phase rust-resisting film box obtained in the preparation examples 1-7 is correspondingly numbered as 1-7, and the slow-release gas phase rust-resisting film box obtained in the comparative preparation examples 1-3 is correspondingly numbered as (r) -c.
Comparative example 1
The rust inhibitor of preparation example 2 was placed in a capsule, but the capsule was not provided with a gas phase rust inhibiting membrane, and the capsule was numbered (r) as comparative example 1.
The gas phase rust-resisting capsule obtained above is subjected to the following tests to detect the slow-release rust-resisting effect of the capsule, and the specific method is as follows:
test 1 closed space evaporation reduction test:
the weight loss rate obtained by the volatilization decrement experiment of the gas phase rust inhibitor in a closed space mainly corresponds to the vapor pressure of the gas phase rust inhibitor. Generally, the vapor phase rust inhibitor with high vapor pressure can be quickly volatilized and adsorbed to the surface of metal to inhibit the early corrosion process, and the vapor phase rust inhibitor with low vapor pressure has a lasting corrosion inhibition effect. However, vapor pressure of the vapor phase rust inhibitor is usually very small (0.133-0.013 Pa at normal temperature), and the vapor phase rust inhibitor is not easy to measure by using instruments, and the vapor pressure is different from the vapor pressure of the vapor phase rust inhibitor in literature. In the volatilization decrement experiment, the vapor pressure of the vapor phase corrosion inhibitor is indirectly compared by comparing the volatilization weight loss rate of the vapor phase rust inhibitor, so that the error of measurement by an instrument can be avoided, and several vapor phase corrosion inhibitors sequentially pass through 24 hours, 48 hours and 72 hours. And (3) testing the weight loss of the rust inhibitor in the rust-resisting film box to calculate the weight loss rate of the gas-phase rust inhibitor in the semi-closed space of the volatilization reduction experiment of the gas-phase rust inhibitor.
The experimental method comprises the following steps:
gas containing 7g of vapor phase corrosion inhibitor and film boxThe area of the phase-rust-resisting diaphragm is 10cm2The gas-phase antirust box is continuously heated for 72 hours in the same oven at the constant temperature of 50 ℃, a fan of the oven is opened, the box is weighed every 24 hours, the weight loss rate is calculated, and the experimental result shows
Table 1:
experiment 2 gas phase discrimination experiment and gas phase corrosion inhibition performance experiment, the experiment is tested according to standard GB/T19532-2004.
1) Gas phase screening experiment:
the experiment is carried out in a 250ml conical flask with a rubber stopper, 7g of the gas phase rust inhibitor of the invention is firstly filled in the flask, and the area of a gas phase rust-resisting diaphragm on the diaphragm box is 10cm2After keeping the temperature of the treated smooth sample in a constant-temperature water bath at 50 ℃ for 2 hours, (wherein the sample is about 10-15mm away from the upper end of the gas-phase corrosion inhibitor), taking out the conical flask from the constant-temperature water bath, adding 15ml of distilled water into the conical flask in order to keep the temperature in the conical flask, then placing the conical flask in the constant-temperature water bath, keeping the temperature of the conical flask at 50 ℃, heating for 8 hours every day, stopping heating for 16 hours, and recording the earliest occurrence time of rust in a cycle of every 24 hours.
2) Gas phase corrosion inhibition performance experiment:
7g of gas phase rust inhibitor is filled in the film box, and the area of a gas phase rust-resisting diaphragm on the film box is 10cm2The membrane cassettes 1 to 7 and (r) to (r) were placed in a 1000ml large beaker, and the grey cast iron sample was placed above the large beaker. The whole beaker was prefixed in a thermostated (40 ℃) water bath for 3 days, then 100ml of NaHCO were added to the beaker3+ NaCl + anhydrous Na2SO4The concentration of the electrolyte solution is 100mg, the experimental time is 3 days, the electrolyte solution is heated in a constant-temperature water bath for 12 hours at constant temperature (40 ℃) every day, and the electrolyte solution is naturally cooled at other times. After the experiment is finished, removing corrosion products by the same method, cleaning, drying, weighing and calculating the corrosion inhibition rate.
The corrosion inhibition rate is calculated according to the formula:
R＝(△G0-△Gi1)/△G0×100％
wherein R is corrosion inhibition rate (%); delta G0The mass difference (g) between the front and the back of the test of the cast iron sample without the gas phase corrosion inhibitor is as follows: and delta G is the mass difference (G) between the samples of the gas-added phase corrosion inhibitor before and after the experiment.
TABLE 2
The experimental results in tables 1 and 2 show that the slow-release gas-phase rust-resisting capsule provided by the invention has good rust-resisting effect and high corrosion inhibition rate, and is suitable for long-term rust and corrosion prevention. The inventor unexpectedly discovers that the slow release effect of the rust inhibitor can be further improved by adding a certain amount of polyvinyl alcohol, the concentration of the gas phase rust inhibiting active ingredient in the air can not be reduced after long-term use, the weight loss rate of the slow release gas phase rust inhibiting film box is reduced slowly, the slow release purpose of the gas phase rust inhibiting ingredient can be effectively achieved, the release of the gas phase volatile ingredient is more lasting and uniform, the gas phase volatile ingredient can not be completely volatilized in a short time, namely, the rusting time is later, the gas phase volatile ingredient can fully play a rust inhibiting function, and therefore, the corrosion inhibition rate is high. But the content of the polyvinyl alcohol is not too high, otherwise, the effective components in the rust inhibitor are difficult to release from the rust inhibitor, and the rust inhibiting effect is reduced; in addition, the content of polyvinyl alcohol cannot be too low, otherwise, the purpose of slowly releasing the rust inhibitor cannot be achieved. Therefore, the amount of polyvinyl alcohol used in the present invention should be limited to a reasonable range. In addition, in order to further improve the rust-resisting slow-release effect, the rust-resisting film box also adopts a gas-phase rust-resisting diaphragm with a specific shape and gas transmittance, so that the transmission rate of gas-phase volatile components can be controlled, and the release of the gas-phase volatile components is further more durable and uniform.
The preferred embodiment of the invention has high corrosion inhibition rate and moderate volatilization speed of gas-phase volatile components, and is suitable for preventing corrosion for a long time.
However, the above detailed description is specific to one possible embodiment of the present invention, and the preferred embodiment is not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention should be included in the technical scope of the present invention.
Claims (11)
1. A slow-release gas-phase rust resisting film box containing a gas-phase rust resisting agent is characterized by comprising: the film box comprises a film box body with a gas phase rust resisting diaphragm and a gas phase rust inhibitor arranged in the film box body;
the gas-phase rust inhibitor comprises a rust inhibiting component, polyvinyl alcohol and a solvent in a weight ratio of (60-70) - (10-20), wherein the rust inhibiting component comprises the following raw materials in parts by weight: 40-50 parts of first aliphatic amino acid, 20-25 parts of organic amine, 5-10 parts of amino acid alkyl ester and 5-20 parts of benzoate;
the vapor phase rust inhibiting separator includes: a base layer coated with a non-woven fabric including polyvinylidene fluoride;
the waterproof gas barrier layer is provided with a microporous structure, the pore diameter of the microporous structure is 0.05-0.15 mu m, the porosity is 30-80%, the bubble point pressure is 5-20KPa, and the gas phase rust-resisting component transmittance is 4-5g/m2·d；
The gas phase rust inhibitor is organic gas with rust inhibiting effect volatilized by the rust inhibitor;
the gas phase rust-resisting diaphragm is prepared by a preparation method comprising the following steps:
(1) dissolving polyvinylidene fluoride in an organic solvent, stirring, heating in a water bath, preserving heat, adding an additive containing polyvinylpyrrolidone and 2-mercaptoethanol, standing, and realizing complete defoaming to obtain a precursor solution;
(2) and (2) pouring the precursor solution obtained in the step (1) on non-woven fabric to form a film, firstly, soaking the film in flowing water, rolling, then, soaking in water, taking out, and airing to obtain the gas phase rust-resisting diaphragm.
2. The slow-release gas-phase rust-resisting capsule as claimed in claim 1, wherein the weight-average molecular weight of the polyvinyl alcohol is 1000-2000; and/or the solvent is a mixed solvent of alcohol and water in a weight ratio of (10-15) to (85-90).
3. The sustained-release vapor phase rust-resistant capsule as claimed in claim 2, wherein said alcoholic solvent is at least one selected from methanol, ethanol, propanol, butanol, pentanol and hexanol.
4. The slow release gas phase rust-resistant capsule as claimed in claim 1, wherein said first aliphatic amino acid is one or more of beta-alanine, glycine, glutamic acid, asparagine or glutamine; and/or the organic amine is one or more of triethanolamine, isopropylamine, diethylamine, cyclohexylamine, octylamine, ethylenediamine, divinyltriamine and trivinyltetramine; and/or the amino acid alkyl ester is at least one of a second aliphatic amino acid alkyl ester and an aromatic amino acid alkyl ester, and the alkyl ester is an alkyl ester with 1-10 carbon atoms; and/or the benzoate is any one or a mixture of more of sodium benzoate, potassium benzoate and ammonium benzoate.
5. The slow release gas phase rust-resistant capsule as claimed in claim 4, wherein said alkyl ester is a tertiary alkyl ester having 4-7 carbon atoms.
6. The sustained-release gas-phase rust-blocking capsule as claimed in claim 4, wherein the amino acid portion of said second aliphatic amino acid alkyl ester is selected from the group consisting of glycine, α -alanine, cysteine, cystine, lysine, alginic acid, glutamic acid, β -alanine or γ -aminobutyric acid; and/or the amino acid portion of the aromatic amino acid alkyl ester is selected from tryptophan, proline or hydroxyproline.
7. The slow release gas phase rust-resistant capsule as claimed in any one of claims 1 to 6, wherein the preparation method of the gas phase rust-resistant comprises the following steps:
(S1) mixing the amino acid alkyl ester and the alcohol solvent in proportion, and stirring uniformly;
(S2) mixing the polyvinyl alcohol, the first aliphatic amino acid and the benzoate with water in proportion, and uniformly stirring;
(S3) weighing organic amine according to the proportion, and mixing the organic amine with the mixture obtained in the step (1) and the step (2) to obtain the gas-phase rust inhibitor.
8. The slow-release gas-phase rust-resisting capsule as claimed in claim 1, wherein the thickness of the gas-phase rust-resisting capsule is 100-450 μm; and/or the non-woven fabric is filament or staple fiber; and/or the porosity of the waterproof gas barrier layer is 55-65%, the bubble point pressure is 15-20KPa, and the gas phase rust-resisting component transmittance is 4.21-4.8g/m2·d。
9. The slow-release gas-phase rust-resisting capsule as claimed in claim 8, wherein the thickness of the gas-phase rust-resisting capsule is 250-300 μm.
10. Use of a slow release gas phase rust-inhibiting capsule as claimed in any one of claims 1 to 6 or claim 8 or claim 9, for the protection of metallic components inside electrical network equipment.
11. The use of the slow-release gas-phase rust-resisting capsule as recited in claim 7, which is used for protecting metal parts inside power grid equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622748.8A CN110284141B (en) | 2019-07-11 | 2019-07-11 | Gas phase rust inhibitor and slow-release gas phase rust-inhibiting capsule containing same |
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| CN111526683B (en) * | 2020-04-30 | 2021-05-07 | 中电保力（北京）科技有限公司 | Passive moisture-proof and rust-proof method for electrical cabinet |
| CN114075052B (en) * | 2020-08-18 | 2022-07-12 | 博特新材料泰州有限公司 | Composite electromigration reinforcing steel bar corrosion inhibitor and preparation method thereof |
| CN114427096B (en) * | 2020-10-10 | 2024-02-09 | 中国石油化工股份有限公司 | Compound corrosion inhibitor applicable to storage tank gas phase area corrosive medium and preparation method thereof |
| CN114105511B (en) * | 2021-11-10 | 2022-12-27 | 国网电子商务有限公司 | Corrosion-resistant gas-phase rust inhibitor, preparation method thereof and gas-phase rust-resistant film box |
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| CN103507342A (en) * | 2012-06-27 | 2014-01-15 | 沈阳防锈包装材料有限责任公司 | Protective and rustproof packaging material for condensation-proof steel coil and production method thereof |
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| CN2784341Y (en) * | 2004-11-25 | 2006-05-31 | 上海电力学院 | Self adhesive gas-phase antirust box |
| CN102614786B (en) * | 2012-04-24 | 2013-11-20 | 柳州森淼环保技术开发有限公司 | Preparation method of polyvinylidene fluoride ultramicro-filtration dry membrane for flat-plate MBR (membrane bioreactor) |
| WO2015196197A1 (en) * | 2014-06-20 | 2015-12-23 | Clifford Lee | An improved vapor corrosion inhibitor and methods for using same |
| CN105316687A (en) * | 2014-07-01 | 2016-02-10 | 蒋寿悟 | Improved gas-phase antirust agent and preparation method thereof |
| CN206719848U (en) * | 2017-03-29 | 2017-12-08 | 深圳市易洁包装制品有限公司 | Volatile rust prevention antistatic bag |
| CN207791646U (en) * | 2017-12-27 | 2018-08-31 | 东莞市厚威包装科技股份有限公司 | A kind of VCI volatile rust preventions bag layer |
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| CN109811346A (en) * | 2019-01-11 | 2019-05-28 | 东南大学 | A kind of gas phase corrosion inhibitor and preparation method thereof and the application in terms of building iron corrosion protection |
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| EP2347897A1 (en) * | 2011-02-08 | 2011-07-27 | Nordenia Deutschland Gronau GmbH | Packaging material for metallic objects susceptible to corrosion |
| CN103507342A (en) * | 2012-06-27 | 2014-01-15 | 沈阳防锈包装材料有限责任公司 | Protective and rustproof packaging material for condensation-proof steel coil and production method thereof |
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