CN112663067A - Environment-friendly quick-drying water-based antirust agent and preparation method thereof - Google Patents
Environment-friendly quick-drying water-based antirust agent and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of aqueous antirust agents, in particular to an environment-friendly quick-drying aqueous antirust agent and a preparation method thereof, wherein the environment-friendly quick-drying aqueous antirust agent comprises the following components in parts by weight: 220 parts of 170-sodium silicate, 35-50 parts of deionized water, 9-14 parts of rust remover, 5-8 parts of sodium phosphate powder, 4-6 parts of straight iron wire, 1-2 parts of triethanolamine, 2-4 parts of boric acid, 0.1-0.3 part of ethylene diamine tetraacetic acid and 0.7-1.1 part of sodium tungstate; the rust inhibitor needs to be treated before being coated on the surface of the metal which is easy to rust, so that the on-site operation is inconvenient; therefore, the pre-coating glue and the combined liquid arranged in the water-based antirust agent are matched with the film forming granules, the combined liquid is used for separating metal rusts adhered in the process of coating the pre-coating glue, and then the rusts dissolved in the sodium silicate are separated out under the action of gravity under the action of temperature rise of dissolution of sodium phosphate powder in the film forming granules, so that the rust cleaning operation required before the antirust agent is coated is avoided, and the using effect of the environment-friendly quick-drying water-based antirust agent is improved.
Description
Technical Field
The invention relates to the technical field of aqueous rust inhibitors, in particular to an environment-friendly quick-drying aqueous rust inhibitor and a preparation method thereof.
Background
The water-based antirust agent is a water-based antirust solution, and can effectively protect materials such as steel, iron and the like and prevent rusting. According to different requirements of an antirust period, the antirust agent and water are mixed according to a certain ratio for use so as to achieve the purpose of prolonging the storage or service life of the antirust agent, the commonly used metal anticorrosion measure in the market at present is an antirust agent, and the antirust agent is divided into antirust oil, antirust emulsion, water-based antirust agent and the like, wherein the water-based antirust agent does not influence the appearance and touch of the metal surface, and in addition, the improvement of environmental awareness and the consideration of economic benefits of people, the water-based antirust agent which is environment-friendly and convenient to treat is more prone to use.
Before the antirust agent is coated on the surface of a metal which is easy to rust, the rust of the metal needs to be treated, and the surface is polished to a bright degree so as to ensure that the coated water-based antirust agent can form an effective protective film, but the use steps of the antirust agent are increased, so that the antirust agent is inconvenient to operate on site.
The prior art also discloses some technical schemes related to an environment-friendly quick-drying type water-based antirust agent and a preparation method thereof, for example, a Chinese patent with the application number of 2018104110259 discloses an environment-friendly quick-drying type water-based antirust agent and a preparation method thereof, wherein the environment-friendly quick-drying type water-based antirust agent comprises a main corrosion inhibitor, an auxiliary corrosion inhibitor, a film-forming agent, a thickening agent, a penetrating agent and a defoaming agent, wherein the film-forming agent accounts for 3-10 parts, the penetrating agent accounts for 10-30 parts, the thickening agent accounts for 2-5 parts, the auxiliary corrosion inhibitor accounts for 30-45 parts, the main corrosion inhibitor accounts for 30-50 parts, and the defoaming agent accounts for 1-3 parts by mass; after the water-based antirust agent is distributed on the surface of metal, the water-based antirust agent is quickly volatilized, can be dried in air at normal temperature for about 20min, and is far faster than the drying time (about 3-8 h) of the water-based antirust agent on the market; the film is colorless and transparent after being dried, so the film is suitable for metals with various colors; because the volatilization is fast, the metal is uniformly distributed on the surface of the metal, the sagging phenomenon is avoided, and the condition that the effective components are not uniformly distributed because the metal is not dried completely and then scraped in the process of storing or transporting the metal is not easy to occur; however, the technical scheme does not solve the problem that rust generated by the antirust agent needs to be pretreated before the antirust agent is used for the metal, so that the convenience of the antirust agent is influenced.
In view of the above, in order to overcome the above technical problems, the present invention provides an environment-friendly quick-drying aqueous rust inhibitor and a preparation method thereof, and a special aqueous rust inhibitor and a preparation method thereof are adopted to solve the above technical problems.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides an environment-friendly quick-drying type water-based antirust agent and a preparation method and a production method thereof.
The invention relates to an environment-friendly quick-drying water-based antirust agent, which comprises the following components in parts by weight: 220 parts of 170-sodium silicate, 35-50 parts of deionized water, 9-14 parts of rust remover, 5-8 parts of sodium phosphate powder, 4-6 parts of straight iron wire, 1-2 parts of triethanolamine, 2-4 parts of boric acid, 0.1-0.3 part of ethylene diamine tetraacetic acid and 0.7-1.1 part of sodium tungstate; the water-based antirust agent also comprises pre-coating glue, a combined liquid and film forming particles; the combined liquid can reduce the viscosity of precoating glue; the film forming particles are used for dissolving the mixture of the combined liquid and the pre-coating glue into fluid liquid; the pre-coating adhesive takes sodium silicate as a main material; the combined liquid is deionized water filled with 15-35% of an antirust agent; the film forming particles are filled with hydrolysis film particles wrapping sodium phosphate powder;
when the antirust agent is used, before the antirust agent is coated on the surface of a metal which is easy to rust, the rust of the metal needs to be treated, and the surface is polished to a bright degree so as to ensure that the coated water-based antirust agent can form an effective protective film, but the use steps of the antirust agent are increased, so that the antirust agent is inconvenient to operate on site; therefore, the invention firstly coats the precoating glue on the metal surface with rust, the precoating glue is adhered to the rust by matching with the self viscosity of the precoating glue in the coating process, the precoating glue is fully contacted with the rust by the coating action, then the combined liquid is coated on the surface of the precoating glue, the deionized water in the combined liquid is mixed with the sodium silicate in the precoating glue, the sodium silicate is dissolved in water, the rust remover in the combined liquid reacts with the rust by the liquid-phase sodium silicate, the rust adhered to the precoating glue is separated from the metal surface, the rust adhered to the metal surface is separated by the rust remover in the combined liquid, finally the film forming particles are coated, and the sodium phosphate powder is exposed and reacts with the deionized water by the dissolution of the hydrolyzed film particles in the combined liquid under the action of the deionized water, the sodium phosphate powder accounts for less than 10% of the mass fraction of the aqueous antirust agent, so that the decomposed sodium hydroxide does not reach the concentration generating corrosivity, meanwhile, the temperature of a liquid phase is increased by the heat generated in the process that trace sodium hydroxide is dissolved in the aqueous solution, the solubility of the sodium silicate in water is further enhanced, rust on the surface of the metal flows and is separated under the action of gravity, and the liquid-phase sodium silicate forms a film on the surface of the metal after the sodium phosphate powder is completely decomposed, so that the antirust effect is achieved; the invention utilizes the matching of the pre-coating glue and the combination liquid in the water-based antirust agent and the film forming granules, under the viscous action of the pre-coating glue on the rust on the metal surface, the metal rust adhered in the process of coating the pre-coating glue is separated by the combination liquid, and then under the heating action in the process of dissolving the sodium phosphate powder in the film forming granules in a liquid phase, the rust in the dissolved sodium silicate is further separated out under the action of gravity, so that the rust on the metal surface is treated, the rust cleaning operation required before coating the antirust agent is avoided, and the using effect of the environment-friendly quick-drying water-based antirust agent is improved.
Preferably, a straight iron wire is further added into the pre-coating glue, and the diameter of the straight iron wire is less than 0.7mm and the length of the straight iron wire is more than 3.5 mm; the weight percentage of the straight iron wire added in the precoating adhesive is 30-40%; when the rust remover is used, the precoating adhesive is difficult to completely separate rust attached to the metal surface in the coating process, the rust is acted by the rust remover in the combined liquid to be separated from the metal surface, and the precoating adhesive and the combined liquid form the surface tension of a liquid-phase film on the metal surface, so that the rust separated from the metal surface is prevented from moving in the liquid-phase film, and the effective process of the rust remover is influenced; through setting up the straight iron wire in gluing of precoating, make it contact with the rust of metal surface at the gluey brush application process of precoating, increase the separation effect of metal surface rust, and after having added the combined liquid, the sodium silicate in the gluing of precoating produces partial dissolution, the liquid phase viscosity attached to metal surface reduces thereupon, straight iron wire can drop from the liquid phase rete of metal surface under the action of gravity, and take away from wherein mixed rust to break away from simultaneously, and then reach the cleaning action to metal surface rust, thereby the result of use of environmental protection quick-drying type waterborne antirust agent has been promoted.
Preferably, the straight iron wire is added into the precoating glue and is subjected to acid treatment, and the straight iron wire is also provided with miscellaneous nicks; when the rust remover is used, the roughness of the metal surface is increased by the straight iron wires in the precoating glue in the brushing process, and the straight iron wires can be contacted with rust attached to the metal surface, so that the acting force effect of peeling the rust in the brushing process is enhanced, and meanwhile, the straight iron wires can be bent and deformed, and then the subsequent rust falling process in a liquid phase film is influenced; the straight iron wire is subjected to acid treatment, so that the surface of the straight iron wire is converted into iron ions, the provided nicks are utilized to increase the rust carrying amount of the straight iron wire, and after sodium phosphate powder particles in film forming particles react with water, the sodium phosphate powder particles generate heat and simultaneously generate hydroxide ions which react with the iron ions in the liquid phase film to generate ferric hydroxide precipitates, so that the total weight of the straight iron wire and the rust in the liquid phase film on the metal surface is further increased, the straight iron wire and the rust are ensured to fall out from the liquid phase film under the action of gravity, the rust on the metal surface is cleaned, and the using effect of the environment-friendly quick-drying type aqueous antirust agent is maintained.
Preferably, the use steps of the environment-friendly quick-drying type water-based antirust agent are as follows:
s1, pre-coating; coating the prepared antirust agent precoating adhesive on the surface of the metal with rust through a roller, and controlling the precoating adhesive to form a complete film layer structure; the acting force state of the precoating glue coated on the metal surface is ensured through the precoating glue coated on the roller;
s2, recoating; after the precoating glue in the S1 is coated, the combined liquid is coated on the metal surface in a brushing mode, and the use amount of the combined liquid is ensured to be larger than the coating use amount of the precoating glue; the dissolving level of the sodium silicate is ensured by controlling the adding amount of the combined liquid;
s3, three-coating; after the combined liquid in the S2 is completely coated, standing for 10-15min, spraying the film-forming particles on the metal surface, observing the state of the particles in the liquid-phase film on the metal surface, and stopping adding the film-forming particles after the particles begin to fall off; the process state of the reaction is reversely judged by utilizing the falling state of particles in the liquid-phase film, and the targeted operation is carried out to ensure the effects of three combined components in the antirust agent;
s4, film formation: standing for 5-10min after no particles in the liquid-phase film in the S3 are obviously shed, and finishing the treatment of the multi-metal antirust agent; the film forming quality of the water-based antirust agent is ensured by the cleaning effect of the film forming particles on the rust on the metal surface.
The preparation method of the environment-friendly quick-drying water-based antirust agent is suitable for the environment-friendly quick-drying water-based antirust agent, and comprises the following steps:
I. preparing pre-coating glue: mixing and stirring sodium silicate with equal mass and deionized water, adding triethanolamine and sodium tungstate into the sodium silicate after the sodium silicate is dissolved, stirring and heating the mixture to over 65 ℃, dropwise adding boric acid and ethylene diamine tetraacetic acid into the mixture, and regulating the pH value of the mixture to be 5.5-6.5; the pH value is adjusted after the temperature is raised, so that the pH value is matched with the pH value of the liquid phase membrane after the film forming particles are added, and the reaction process of straight iron wires in the liquid phase membrane is promoted;
II. And (3) stabilizing the combined liquid: mixing an antirust agent into deionized water, controlling the specific gravity of the deionized water to be 20-45%, and then adding a chelating agent into the deionized water and maintaining the chelating agent within the range of 5-15 ℃; preserving the components of the rust remover by using the temperature maintained by the combined liquid;
III, synthesis of film forming particles: selecting sodium phosphate powder, weighing and dividing into 0.3-0.5g of single parts by mass, wrapping the sodium phosphate powder by a hydrolysis membrane, and placing the prepared membrane-forming granules in a baking furnace at 35-45 ℃ to control the water content to be below 10%; the performance of the sodium phosphate powder is maintained by removing the moisture of the film-forming granules;
IV, mixing straight iron wires: installing the straight iron wire on a knurling wheel, quickly forming a needed nick, and then adding the nick into the process step of stirring sodium silicate and deionized water to complete the process step; by adding the straight iron wires after the pre-coating glue is mixed, the uniform distribution state of the iron wires in the pre-coating glue is ensured, and the using effect of the antirust agent is maintained.
Preferably, the straight iron wire is subjected to heat preservation treatment in advance before the pre-coating adhesive is added, and is placed in an oven at the temperature of 80-90 ℃; when the straight iron wire is added with the pre-coating glue in the mixing preparation process, the stirring and heating process after the working procedure steps can reduce the heat conduction effect of the pre-coating glue and influence the stability of the straight iron wire shape; the straight iron wire is subjected to preheating treatment, so that the interference of the straight iron wire to the temperature rise process of the pre-coating adhesive is weakened, the change of the form of the straight iron wire caused by the strength change in the temperature rise process is avoided, and the using effect of the environment-friendly quick-drying type water-based antirust agent is maintained.
The invention has the following beneficial effects:
1. according to the invention, the pre-coating glue and the combined liquid which are arranged in the water-based antirust agent are matched with the film forming granules, under the viscous action of the pre-coating glue on metal surface rusts, the metal rusts adhered in the process of coating the pre-coating glue are separated by the combined liquid, and then under the heating action in the process of dissolving sodium phosphate powder in the film forming granules in a liquid phase, the rusts in the dissolved sodium silicate are further separated out under the action of gravity, so that the rusts cleaning operation which is required before coating the antirust agent is avoided.
2. The straight iron wires arranged in the precoating glue are contacted with the rust on the metal surface in the brushing process of the precoating glue, after the combination liquid is added, the sodium silicate in the precoating glue is partially dissolved, the viscosity of the liquid phase attached to the metal surface is reduced, the straight iron wires can deflect under the action of the gravity of the end flange pieces and tend to the vertical direction of the action of the gravity, and meanwhile, the increased surface area of the end flange pieces can be attached to the straight iron wires under the action of the tension of the liquid phase surface, so that the straight iron wires are perpendicular to the surface of the liquid phase film, namely perpendicular to the metal surface, and the separation track of the free rust in the liquid phase film is guided.
Drawings
The invention is further described with reference to the following figures and embodiments.
FIG. 1 is a flow chart showing the steps of using the environmentally friendly quick-drying aqueous rust inhibitor of the present invention;
FIG. 2 is a flow chart of a method for preparing the environmentally friendly quick-drying aqueous rust inhibitor of the present invention;
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in figures 1 to 2, the environment-friendly quick-drying water-based antirust agent comprises the following components in parts by weight: 220 parts of 170-sodium silicate, 35-50 parts of deionized water, 9-14 parts of rust remover, 5-8 parts of sodium phosphate powder, 4-6 parts of straight iron wire, 1-2 parts of triethanolamine, 2-4 parts of boric acid, 0.1-0.3 part of ethylene diamine tetraacetic acid and 0.7-1.1 part of sodium tungstate; the water-based antirust agent also comprises pre-coating glue, a combined liquid and film forming particles; the combined liquid can reduce the viscosity of precoating glue; the film forming particles are used for dissolving the mixture of the combined liquid and the pre-coating glue into fluid liquid; the pre-coating adhesive takes sodium silicate as a main material; the combined liquid is deionized water filled with 15-35% of an antirust agent; the film forming particles are filled with hydrolysis film particles wrapping sodium phosphate powder;
when the antirust agent is used, before the antirust agent is coated on the surface of a metal which is easy to rust, the rust of the metal needs to be treated, and the surface is polished to a bright degree so as to ensure that the coated water-based antirust agent can form an effective protective film, but the use steps of the antirust agent are increased, so that the antirust agent is inconvenient to operate on site; therefore, the invention firstly coats the precoating glue on the metal surface with rust, the precoating glue is adhered to the rust by matching with the self viscosity of the precoating glue in the coating process, the precoating glue is fully contacted with the rust by the coating action, then the combined liquid is coated on the surface of the precoating glue, the deionized water in the combined liquid is mixed with the sodium silicate in the precoating glue, the sodium silicate is dissolved in water, the rust remover in the combined liquid reacts with the rust by the liquid-phase sodium silicate, the rust adhered to the precoating glue is separated from the metal surface, the rust adhered to the metal surface is separated by the rust remover in the combined liquid, finally the film forming particles are coated, and the sodium phosphate powder is exposed and reacts with the deionized water by the dissolution of the hydrolyzed film particles in the combined liquid under the action of the deionized water, the sodium phosphate powder accounts for less than 10% of the mass fraction of the aqueous antirust agent, so that the decomposed sodium hydroxide does not reach the concentration generating corrosivity, meanwhile, the temperature of a liquid phase is increased by the heat generated in the process that trace sodium hydroxide is dissolved in the aqueous solution, the solubility of the sodium silicate in water is further enhanced, rust on the surface of the metal flows and is separated under the action of gravity, and the liquid-phase sodium silicate forms a film on the surface of the metal after the sodium phosphate powder is completely decomposed, so that the antirust effect is achieved; the invention utilizes the matching of the pre-coating glue and the combination liquid in the water-based antirust agent and the film forming granules, under the viscous action of the pre-coating glue on the rust on the metal surface, the metal rust adhered in the process of coating the pre-coating glue is separated by the combination liquid, and then under the heating action in the process of dissolving the sodium phosphate powder in the film forming granules in a liquid phase, the rust in the dissolved sodium silicate is further separated out under the action of gravity, so that the rust on the metal surface is treated, the rust cleaning operation required before coating the antirust agent is avoided, and the using effect of the environment-friendly quick-drying water-based antirust agent is improved.
As an embodiment of the invention, the precoating glue is also added with straight iron wires, the diameter of the straight iron wires is less than 0.7mm, and the length of the straight iron wires is more than 3.5 mm; the weight percentage of the straight iron wire added in the precoating adhesive is 30-40%; when the rust remover is used, the precoating adhesive is difficult to completely separate rust attached to the metal surface in the coating process, the rust is acted by the rust remover in the combined liquid to be separated from the metal surface, and the precoating adhesive and the combined liquid form the surface tension of a liquid-phase film on the metal surface, so that the rust separated from the metal surface is prevented from moving in the liquid-phase film, and the effective process of the rust remover is influenced; through setting up the straight iron wire in gluing of precoating, make it contact with the rust of metal surface at the gluey brush application process of precoating, increase the separation effect of metal surface rust, and after having added the combined liquid, the sodium silicate in the gluing of precoating produces partial dissolution, the liquid phase viscosity attached to metal surface reduces thereupon, straight iron wire can drop from the liquid phase rete of metal surface under the action of gravity, and take away from wherein mixed rust to break away from simultaneously, and then reach the cleaning action to metal surface rust, thereby the result of use of environmental protection quick-drying type waterborne antirust agent has been promoted.
As an embodiment of the invention, the straight iron wire is treated with acid after being added into the precoating adhesive, and the straight iron wire is also provided with miscellaneous nicks; when the rust remover is used, the roughness of the metal surface is increased by the straight iron wires in the precoating glue in the brushing process, and the straight iron wires can be contacted with rust attached to the metal surface, so that the acting force effect of peeling the rust in the brushing process is enhanced, and meanwhile, the straight iron wires can be bent and deformed, and then the subsequent rust falling process in a liquid phase film is influenced; the straight iron wire is subjected to acid treatment, so that the surface of the straight iron wire is converted into iron ions, the provided nicks are utilized to increase the rust carrying amount of the straight iron wire, and after sodium phosphate powder particles in film forming particles react with water, the sodium phosphate powder particles generate heat and simultaneously generate hydroxide ions which react with the iron ions in the liquid phase film to generate ferric hydroxide precipitates, so that the total weight of the straight iron wire and the rust in the liquid phase film on the metal surface is further increased, the straight iron wire and the rust are ensured to fall out from the liquid phase film under the action of gravity, the rust on the metal surface is cleaned, and the using effect of the environment-friendly quick-drying type aqueous antirust agent is maintained.
As an embodiment of the invention, the environmental-friendly quick-drying type water-based antirust agent is used by the following steps:
s1, pre-coating; coating the prepared antirust agent precoating adhesive on the surface of the metal with rust through a roller, and controlling the precoating adhesive to form a complete film layer structure; the acting force state of the precoating glue coated on the metal surface is ensured through the precoating glue coated on the roller;
s2, recoating; after the precoating glue in the S1 is coated, the combined liquid is coated on the metal surface in a brushing mode, and the use amount of the combined liquid is ensured to be larger than the coating use amount of the precoating glue; the dissolving level of the sodium silicate is ensured by controlling the adding amount of the combined liquid;
s3, three-coating; after the combined liquid in the S2 is completely coated, standing for 10-15min, spraying the film-forming particles on the metal surface, observing the state of the particles in the liquid-phase film on the metal surface, and stopping adding the film-forming particles after the particles begin to fall off; the process state of the reaction is reversely judged by utilizing the falling state of particles in the liquid-phase film, and the targeted operation is carried out to ensure the effects of three combined components in the antirust agent;
s4, film formation: standing for 5-10min after no particles in the liquid-phase film in the S3 are obviously shed, and finishing the treatment of the multi-metal antirust agent; the film forming quality of the water-based antirust agent is ensured by the cleaning effect of the film forming particles on the rust on the metal surface.
The preparation method of the environment-friendly quick-drying water-based antirust agent is suitable for the environment-friendly quick-drying water-based antirust agent, and comprises the following steps:
I. preparing pre-coating glue: mixing and stirring sodium silicate with equal mass and deionized water, adding triethanolamine and sodium tungstate into the sodium silicate after the sodium silicate is dissolved, stirring and heating the mixture to over 65 ℃, dropwise adding boric acid and ethylene diamine tetraacetic acid into the mixture, and regulating the pH value of the mixture to be 5.5-6.5; the pH value is adjusted after the temperature is raised, so that the pH value is matched with the pH value of the liquid phase membrane after the film forming particles are added, and the reaction process of straight iron wires in the liquid phase membrane is promoted;
II. And (3) stabilizing the combined liquid: mixing an antirust agent into deionized water, controlling the specific gravity of the deionized water to be 20-45%, and then adding a chelating agent into the deionized water and maintaining the chelating agent within the range of 5-15 ℃; preserving the components of the rust remover by using the temperature maintained by the combined liquid;
III, synthesis of film forming particles: selecting sodium phosphate powder, weighing and dividing into 0.3-0.5g of single parts by mass, wrapping the sodium phosphate powder by a hydrolysis membrane, and placing the prepared membrane-forming granules in a baking furnace at 35-45 ℃ to control the water content to be below 10%; the performance of the sodium phosphate powder is maintained by removing the moisture of the film-forming granules;
IV, mixing straight iron wires: installing the straight iron wire on a knurling wheel, quickly forming a needed nick, and then adding the nick into the process step of stirring sodium silicate and deionized water to complete the process step; by adding the straight iron wires after the pre-coating glue is mixed, the uniform distribution state of the iron wires in the pre-coating glue is ensured, and the using effect of the antirust agent is maintained.
As an embodiment of the invention, the straight iron wire is subjected to heat preservation treatment in advance before the pre-coating adhesive is added, and is placed in an oven at the temperature of 80-90 ℃; when the straight iron wire is added with the pre-coating glue in the mixing preparation process, the stirring and heating process after the working procedure steps can reduce the heat conduction effect of the pre-coating glue and influence the stability of the straight iron wire shape; the straight iron wire is subjected to preheating treatment, so that the interference of the straight iron wire to the temperature rise process of the pre-coating adhesive is weakened, the change of the form of the straight iron wire caused by the strength change in the temperature rise process is avoided, and the using effect of the environment-friendly quick-drying type water-based antirust agent is maintained.
When in use, pre-coating glue, combined liquid and film forming particles arranged in the water-based antirust agent are firstly coated on the surface of metal with rust, the pre-coating glue is adhered to the rust in a matched manner in the coating process, the pre-coating glue is fully contacted with the rust in a coating action, then the combined liquid is coated on the surface of the pre-coating glue, deionized water in the combined liquid is mixed with sodium silicate in the pre-coating glue, the sodium silicate is dissolved in water, the rust remover in the combined liquid reacts with the rust through the liquid-phase sodium silicate, the rust adhered to the pre-coating glue is separated from the metal surface, the rust adhered to the metal surface is separated by the rust remover in the combined liquid, finally the film forming particles are coated, and sodium phosphate powder in the film forming particles is exposed and reacts with the deionized water through the dissolution of the hydrolyzed film particles in the combined liquid under the action of the deionized water, the sodium phosphate powder accounts for less than 10% of the mass fraction of the aqueous antirust agent, so that the decomposed sodium hydroxide does not reach the concentration generating corrosivity, meanwhile, the temperature of a liquid phase is increased by the heat generated in the process that trace sodium hydroxide is dissolved in the aqueous solution, the solubility of the sodium silicate in water is further enhanced, rust on the surface of the metal flows and is separated under the action of gravity, and the liquid-phase sodium silicate forms a film on the surface of the metal after the sodium phosphate powder is completely decomposed, so that the antirust effect is achieved; the straight iron wires arranged in the precoating glue are contacted with the rusts on the metal surface in the coating process of the precoating glue, so that the separation effect of the rusts on the metal surface is improved, and after the combination liquid is added, the sodium silicate in the precoating glue is partially dissolved, the viscosity of a liquid phase attached to the metal surface is reduced, the straight iron wires can fall off from the liquid phase film on the metal surface under the action of gravity and are simultaneously separated from the mixed rusts to be separated, and further the cleaning effect on the rusts on the metal surface is achieved; performing acid treatment on the straight iron wire to convert the surface of the straight iron wire into iron ions, increasing the rust carrying amount of the straight iron wire by utilizing the arranged nicks, generating heat and hydroxyl ions at the same time after sodium phosphate powder particles in film forming particles react with water, and reacting with the iron ions in the liquid phase film to generate ferric hydroxide precipitate, further increasing the total weight of the straight iron wire and the rust in the liquid phase film on the metal surface, ensuring that the straight iron wire and the rust fall out of the liquid phase film under the action of gravity, and finishing the cleaning of the rust on the metal surface; the straight iron wire is preheated, so that the interference of the straight iron wire to the temperature rise process of the pre-coating adhesive is weakened, and the form change caused by the strength change in the temperature rise process is avoided.
In order to verify the actual use effect of the environment-friendly quick-drying water-based antirust agent, the following experiments are carried out.
Investigating corresponding measures of rust treatment of a steel plate by a certain steel plate manufacturer, dividing the used rust inhibitor into four groups according to the same-grade steel plates produced in the same batch, testing 15 steel plates in each group, respectively using the water-based rust inhibitor in the invention, removing straight iron wires, continuing to use the water-based rust inhibitor and replacing the water-based rust inhibitor with a brand, and recording the working hours consumed by rust treatment of the steel plate, the rust inhibiting effect of the steel plate and the effective time of the rust inhibitor; the rust prevention effect of the steel plate is judged by detecting the quality change of the steel plate, and the effective time of the rust inhibitor is changed by observing the corrosion increment on the surface of the steel plate;
experimental group 1, using the aqueous rust inhibitor of the present invention:
experiment group 2, the water-based rust inhibitor of the present invention was used and straight iron wires were removed:
experimental group 3, aqueous rust inhibitor continuously used in the same:
experiment group 4, brand-changed aqueous rust inhibitor:
from the results recorded in the above experimental groups, it was found that the rust state of the steel sheet varies to various degrees by using the aqueous rust inhibitor of the present invention, and the straight iron wires removed, the aqueous rust inhibitor continued to be used, and the brand-changed aqueous rust inhibitor; taking the data recorded in which the aqueous rust inhibitor in use is continuously used as a reference for comparison; the water-based antirust agent of the brand is replaced, and the recorded data shows that the state change of the steel plate after 20 days is slightly better than that of the water-based antirust agent in use; when the aqueous antirust agent is used, the working hours of antirust treatment of the steel plate and the protection effect of the steel plate state are obviously improved; the water-based antirust agent of the invention removes the water-based antirust agent of straight iron wires, so the labor of the rust-proof treatment of the steel plate is increased, but the water-based antirust agent is still better than the water-based antirust agent in use, but the protection of the state of the steel plate has the worst effect in the sample of the experiment; then, it was found that the aqueous rust inhibitor of the present invention has a certain effect of improving the man-hour of rust-proofing treatment of steel sheets and the protection of steel sheet conditions.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. An environment-friendly quick-drying water-based antirust agent is characterized by comprising the following components in parts by weight: 220 parts of 170-sodium silicate, 35-50 parts of deionized water, 9-14 parts of rust remover, 5-8 parts of sodium phosphate powder, 4-6 parts of straight iron wire, 1-2 parts of triethanolamine, 2-4 parts of boric acid, 0.1-0.3 part of ethylene diamine tetraacetic acid and 0.7-1.1 part of sodium tungstate; the water-based antirust agent also comprises pre-coating glue, a combined liquid and film forming particles; the combined liquid can reduce the viscosity of precoating glue; the film forming particles are used for dissolving the mixture of the combined liquid and the pre-coating glue into fluid liquid; the pre-coating adhesive takes sodium silicate as a main material; the combined liquid is deionized water filled with 15-35% of an antirust agent; and the film forming particles are filled with hydrolysis film particles wrapping sodium phosphate powder.
2. The environment-friendly quick-drying water-based antirust agent as claimed in claim 1, wherein: a straight iron wire is also added into the pre-coating adhesive, and the diameter of the straight iron wire is less than 0.7mm and the length of the straight iron wire is more than 3.5 mm; the weight percentage of the straight iron wires added in the pre-coating adhesive is 30-40%.
3. The environment-friendly quick-drying water-based antirust agent as claimed in claim 2, wherein: the straight iron wire is added into the precoating glue and is subjected to acid treatment, and the straight iron wire is also provided with miscellaneous nicks.
4. The environment-friendly quick-drying water-based antirust agent as claimed in claim 3, wherein: the use steps of the environment-friendly quick-drying water-based antirust agent are as follows:
s1, pre-coating; coating the prepared antirust agent precoating adhesive on the surface of the metal with rust through a roller, and controlling the precoating adhesive to form a complete film layer structure;
s2, recoating; after the precoating glue in the S1 is coated, the combined liquid is coated on the metal surface in a brushing mode, and the use amount of the combined liquid is ensured to be larger than the coating use amount of the precoating glue;
s3, three-coating; after the combined liquid in the S2 is completely coated, standing for 10-15min, spraying the film-forming particles on the metal surface, observing the state of the particles in the liquid-phase film on the metal surface, and stopping adding the film-forming particles after the particles begin to fall off;
s4, film formation: and (5) standing for 5-10min after the particles in the liquid-phase film in the S3 have not fallen off obviously, and finishing the treatment of the multi-metal antirust agent.
5. A preparation method of an environment-friendly quick-drying water-based antirust agent is characterized in that the preparation method is suitable for the environment-friendly quick-drying water-based antirust agent of any one of claims 1 to 4, and comprises the following steps:
I. preparing pre-coating glue: mixing and stirring sodium silicate with equal mass and deionized water, adding triethanolamine and sodium tungstate into the sodium silicate after the sodium silicate is dissolved, stirring and heating the mixture to over 65 ℃, dropwise adding boric acid and ethylene diamine tetraacetic acid into the mixture, and regulating the pH value of the mixture to be 5.5-6.5;
II. And (3) stabilizing the combined liquid: mixing an antirust agent into deionized water, controlling the specific gravity of the deionized water to be 20-45%, and then adding a chelating agent into the deionized water and maintaining the chelating agent within the range of 5-15 ℃;
III, synthesis of film forming particles: selecting sodium phosphate powder, weighing and dividing into 0.3-0.5g of single parts by mass, wrapping the sodium phosphate powder by a hydrolysis membrane, and placing the prepared membrane-forming granules in a baking furnace at 35-45 ℃ to control the water content to be below 10%;
IV, mixing straight iron wires: installing the straight iron wire on a knurling wheel, quickly forming the needed nick, and then adding the nick into the sodium silicate and deionized water to complete the stirring process.
6. The method for preparing the environment-friendly quick-drying water-based antirust agent according to claim 5, characterized in that: the straight iron wire is subjected to heat preservation treatment in advance before the pre-coating adhesive is added, and is placed in an oven at the temperature of 80-90 ℃.
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