High-efficiency stable nano SiO2-Al2O3 compound water-based antirust agent and preparation method thereof

Abstract

The application discloses a kind of high-efficiency stable nano-SiO2-Al2O3 compound water-based antirust agent and preparation method thereof, the compound water-based antirust agent includes the following mass fraction components: nano-silica 10-20 parts, nano-alumina 5-10 parts, compound dispersing aid 3.0-8.0 parts, compound auxiliary antirust agent 1.0-3.0 parts, compound surfactant 1.0-3.0 parts, compound pH regulator 1.0-4.0 parts, compound defoaming agent 1.0-3.0 parts, compound fungicide 1.0-3.0 parts, deionized water 55-75 parts.The antirust agent not only has excellent antirust and stable performance, but also has the advantages of environmental protection, non-toxic, easy to prepare and the like.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal rust prevention, and particularly relates to a high-efficiency and stable type of nano SiO2-Al2O3 compounded water-based rust inhibitor and a preparation method thereof. BACKGROUND

[0002] Traditional methods for preventing rust on metal surfaces mainly include coating protection, electrochemical protection and alloying. Although these methods can inhibit the corrosion of metal surfaces to some extent, their rust prevention effects are often difficult to guarantee under complex and variable environmental conditions or during long-term use. In recent years, with the rapid development of nanotechnology, the application of nanomaterials in the field of metal rust prevention has gradually attracted widespread attention. Nanomaterials have unique physical and chemical properties, such as high specific surface area, high activity, excellent dispersibility and stability, etc. These properties enable nanomaterials to form a dense protective film on the metal surface, effectively blocking the corrosion of water, oxygen and other corrosive media, thereby improving the corrosion resistance of the metal. Among them, nano-silicon dioxide (SiO2) and nano-aluminum oxide (Al2O3) have attracted much attention due to their excellent performance. Nano-silicon dioxide has good chemical stability and thermal stability, and can form a dense siloxane network structure on the metal surface, effectively inhibiting the corrosion of the metal surface. Nano-aluminum oxide, on the other hand, has high hardness, high melting point and high chemical stability, and can maintain stable rust prevention effect under harsh environments such as high temperature and high pressure. Therefore, by compounding nano-silicon dioxide and nano-aluminum oxide, the synergistic effect of the two types of nanoparticles in rust prevention can be achieved, thereby improving the rust prevention performance of the rust inhibitor. SUMMARY

[0003] The application successfully prepares a water-based nano-rust inhibitor based on the compounding of nano-silicon dioxide and nano-aluminum oxide by optimizing the compounding ratio of nano-silicon dioxide and nano-aluminum oxide, improving the preparation process and adding an appropriate amount of additives, thereby solving the problem of poor rust prevention effect of the rust inhibitor in the prior art. The rust inhibitor not only has excellent rust prevention performance, but also has the advantages of being environmentally friendly, non-toxic, easy to prepare and convenient to use, and can provide good rust prevention effect on the metal surface.

[0004] In order to achieve the above-mentioned application purposes, the application provides a high-efficiency and stable type of nano SiO2-Al2O3 compounded water-based rust inhibitor, which comprises the following components in mass fraction: 10-20 parts of nano-silicon dioxide, 5-10 parts of nano-aluminum oxide, 3.0-8.0 parts of a compounded dispersing aid, 1.0-3.0 parts of a compounded auxiliary rust inhibitor, 1.0-3.0 parts of a compounded surfactant, 1.0-4.0 parts of a compounded pH regulator, 1.0-3.0 parts of a compounded defoaming agent, 1.0-3.0 parts of a compounded bactericide, and 55-75 parts of deionized water.

[0005] In the above technical solution, further, the particle size of the nano-silicon dioxide and nano-aluminum oxide is controlled to be 30-50 nm to ensure that it has the characteristics of nano-materials, so that it has a high specific surface area and excellent physical and chemical properties.

[0006] Further, the complex dispersing aid is prepared by mixing 60-70% sodium polyacrylate and 30-40% polyvinylpyrrolidone by weight; and the complex surfactant is prepared by mixing 70-80% sodium dodecyl sulfate SDS and 20-30% fatty alcohol polyoxyethylene ether AEO by weight. The rust inhibitor takes nano-silicon dioxide and nano-aluminum oxide as the core rust inhibitor component, and significantly improves its rust prevention performance through the characteristics of nano-particles. By adding an appropriate amount of complex dispersing aid and complex surfactant, the water-based nano-rust inhibitor can maintain excellent dispersibility and stability in various application environments.

[0007] The complex auxiliary rust inhibitor is prepared by mixing 40-50% benzotriazole (BTA), 30-40% decanoic acid, and 20-30% dodecenyl succinic acid by weight. The complex auxiliary rust inhibitor can form a dense protective film on the metal surface, effectively isolating oxygen and moisture.

[0008] The complex pH regulator is prepared by mixing 40-60% citric acid and 40-60% disodium hydrogen phosphate by weight. By adding an appropriate amount of complex pH regulator, the pH value of the rust inhibitor is stably controlled in the range of 6-7, and the complex pH regulator can make the nano water-based rust inhibitor have good compatibility with the metal material surface.

[0009] The complex defoaming agent is prepared by mixing 80-90% silicone defoaming agent and 10-20% polyether defoaming agent by weight; and the complex bactericide is prepared by mixing 25-35% glutaraldehyde, 30-40% triclosan, 20-30% isothiazolinone, and 15-25% phenoxyethanol by weight. The added complex bactericide can effectively kill or inhibit the growth of microorganisms, and protect the rust inhibitor from microbial contamination.

[0010] A preparation method of the above-mentioned high-efficiency and stable nano-SiO2-Al2O3 complex water-based rust inhibitor, the preparation method comprising the following steps:

[0011] ① First, 55-75 parts of deionized water are added to a reaction kettle and heated to 50-60°C, and nano-silicon dioxide and nano-aluminum oxide are added to the reaction kettle, and a stirrer is started, with a stirring speed controlled at 300-500 rpm, and stirring is continued for 30-45 minutes.

[0012] ②Add the complex dispersing aid to the above solution, and increase the stirring speed to 500-700 rpm, and stir for 15-25 minutes.

[0013] ③Add the complex surfactant and the complex auxiliary rust inhibitor to the reaction kettle in sequence, keep the stirring speed at 500-700 rpm, and stir for 30-45 minutes.

[0014] ④Reduce the stirring speed to 200-400 rpm, and slowly drop the complex pH regulator into the reaction kettle until the pH value is stable in the range of 6-7.

[0015] ⑤Add the complex defoaming agent into the reaction kettle, keep the stirring speed at 200-400 rpm, and continuously stir for 5-10 minutes.

[0016] ⑥Finally, add the complex bactericide into the reaction kettle, increase the stirring speed to 400-600 rpm, and continuously stir for 5-10 minutes.

[0017] ⑦After all the components are added, increase the stirring speed to 800-1000 rpm, and stir for 45-60 minutes until the water-based rust inhibitor is cooled to room temperature, and a high-efficiency and stable type of nano SiO2-Al2O3 complex water-based rust inhibitor is obtained.

[0018] Compared with the prior art, the high-efficiency and stable type of nano SiO2-Al2O3 complex water-based rust inhibitor has the following beneficial effects:

[0019] The high-efficiency and stable type of nano SiO2-Al2O3 complex water-based rust inhibitor provided by the application adopts the nano technology and the environment-friendly additive, significantly improves the rust prevention effect, and has a simple and easy-to-implement preparation method and meets the environmental protection requirements. DETAILED DESCRIPTION

[0020] The application is further described below in combination with specific embodiments, but the application is not limited in any way by the embodiments. To avoid redundancy, the raw materials in the following embodiments are all commercially available products if not specifically stated, and the methods used are all conventional methods if not specifically stated.

[0021] A high-efficiency and stable type of nano SiO2-Al2O3 complex water-based rust inhibitor includes the following components in mass fraction: 10-20 parts of nano silicon dioxide, 5-10 parts of nano aluminum oxide, 3.0-8.0 parts of complex dispersing aid, 1.0-3.0 parts of complex auxiliary rust inhibitor, 1.0-3.0 parts of complex surfactant, 1.0-4.0 parts of complex pH regulator, 1.0-3.0 parts of complex defoaming agent, 1.0-3.0 parts of complex bactericide, and 55-75 parts of deionized water.

[0022] A preparation method of the above-mentioned high-efficiency and stable nano-SiO2-Al2O3 compound water-based antirust agent, the preparation method comprising the following steps:

[0023] ①First, 55-75 parts of deionized water are added to a reaction kettle and heated to 50-60°C, and nano-silicon dioxide and nano-aluminum oxide are added to the reaction kettle, and a stirrer is started, with the stirring speed controlled at 300-500 rpm, and the stirring is continued for 30-45 minutes.

[0024] ②The compound dispersing aid is added to the above-mentioned solution, and the stirring speed is increased to 500-700 rpm, and the stirring is continued for 15-25 minutes.

[0025] ③The compound surfactant and the compound auxiliary antirust agent are sequentially added to the reaction kettle, the stirring speed is maintained at 500-700 rpm, and the stirring time is 30-45 minutes.

[0026] ④The stirring speed is reduced to 200-400 rpm, and the compound pH regulator is slowly added dropwise to the reaction kettle until the pH value is stabilized in the range of 6-7.

[0027] ⑤The compound defoaming agent is added to the reaction kettle, the stirring speed is maintained at 200-400 rpm, and the stirring is continued for 5-10 minutes.

[0028] ⑥Finally, the compound bactericide is added to the reaction kettle, the stirring speed is increased to 400-600 rpm, and the stirring is continued for 5-10 minutes.

[0029] ⑦After all the components are added, the stirring speed is increased to 800-1000 rpm, and the stirring is continued for 45-60 minutes until the water-based antirust agent is cooled to room temperature, thereby obtaining the high-efficiency and stable nano-SiO2-Al2O3 compound water-based antirust agent.

[0030] In the following examples, the unexplained contents are the same as those described in the above specific embodiments.

[0031] Examples

[0032] A high-efficiency and stable nano-SiO2-Al2O3 compound water-based antirust agent, the component contents (mass parts) of the compound water-based antirust agents of Examples 1-10 are shown in Table 1.

[0033] Table 1 Component contents of the nano-SiO2-Al2O3 compound water-based antirust agents of Examples 1-10

[0034]

[0035] A preparation method of the above-mentioned nano-SiO2-Al2O3 compound water-based antirust agent, the specific process steps of Examples 1-10 are:

[0036] ①First, in the reaction kettle according to the component allocation ratio of each example, 55-75 parts of deionized water is added and heated to 50-60℃, 10-20 parts of nano silicon dioxide and 5-10 parts of nano aluminum oxide are sequentially added into the reaction kettle, and the stirrer is started at the same time, the stirring speed is controlled at 300-500 rpm, and the stirring is continued for 30-45 minutes.

[0037] ②3.0-8.0 parts of the compound dispersing aid is added to the above solution, and the stirring speed is increased to 500-700 rpm, and stirred for 15-25 minutes.

[0038] The compound dispersing aid is prepared by mixing 60% sodium polyacrylate and 40% polyvinylpyrrolidone by weight ratio, stirring at a speed of 500 rpm for 15 minutes.

[0039] ③1.0-3.0 parts of the compound surfactant and 1.0-3.0 parts of the compound auxiliary rust inhibitor are sequentially added into the reaction kettle, the stirring speed is maintained at 500-700 rpm, and the stirring time is 30-45 minutes.

[0040] The compound surfactant is prepared by mixing 80% sodium dodecyl sulfate SDS and 20% fatty alcohol polyoxyethylene ether AEO by weight ratio, stirring at a speed of 400 rpm for 10 minutes.

[0041] The compound auxiliary rust inhibitor is prepared by mixing 40% benzotriazole BTA, 30% decanoic acid and 30% dodecyl succinic acid by weight ratio, stirring at a speed of 500 rpm for 20 minutes.

[0042] ④The stirring speed is reduced to 200-400 rpm, and 1.0-4.0 parts of the compound pH regulator is slowly added into the reaction kettle until the pH value is stable in the range of 6-7.

[0043] The compound pH regulator is prepared by mixing 60% citric acid and 40% disodium hydrogen phosphate by weight ratio, stirring at a speed of 400 rpm for 10 minutes.

[0044] ⑤1.0-3.0 parts of the compound defoaming agent is added into the reaction kettle, the stirring speed is maintained at 200-400 rpm, and the stirring is continued for 15-20 minutes.

[0045] The compound defoaming agent is prepared by mixing 80% silicone defoaming agent and 20% polyether defoaming agent by weight ratio, stirring at a speed of 500 rpm for 15 minutes.

[0046] ⑥ Finally, add 1.0-3.0 parts of the compound bactericide to the reactor, increase the stirring speed to 400-600 rpm, and continue stirring for 15-20 minutes.

[0047] The compound bactericide is prepared by mixing 25% glutaraldehyde, 40% triclosan, 20% isothiazolinone, and 15% phenoxyethanol by weight, and stirring at 400 rpm for 10 minutes.

[0048] ⑦ After all the above components have been added, increase the stirring speed to 1000-1200 rpm and stir for 40-60 minutes. Then stop stirring and air cool to room temperature to obtain a highly efficient and stable nano-SiO2-Al2O3 compound water-based rust inhibitor.

[0049] According to the components and mass content of the nano-SiO2-Al2O3 compound water-based rust inhibitor in Examples 1-10 in Table 1, water-based nano rust inhibitors were prepared using the above process. The test pieces were immersed in the nano-SiO2-Al2O3 compound water-based rust inhibitors prepared in Examples 1-10, and then dried. The rust prevention performance was tested according to SH / T 0533 "Rust Prevention Grease Rust Prevention Test Specimen Rust Evaluation Method". Table 2 shows the implementation technical effects of Examples 1-10.

[0050] Table 2. Implementation technical effects of Examples 1-10

[0051]

[0052] The implementation effects of the nano-SiO2-Al2O3 water-based rust inhibitors prepared in Examples 1-10 above show that these nano-water-based rust inhibitors not only have excellent rust-preventing properties, but also are easy to prepare and convenient to use, providing a new type of environmentally friendly nano-water-based rust inhibitor product for the field of metal rust prevention.

[0053] For anyone skilled in the art, many possible variations and modifications can be made to the technical solutions of this invention, or equivalent embodiments can be modified based on the disclosed technical content, without departing from the scope of the technical solutions of this invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this invention without departing from the content of the technical solutions of this invention should still fall within the protection scope of the technical solutions of this invention.

Claims

1. A high-efficiency stable nano-SiO2-Al2O3 compound water-based antirust agent, characterized in that, The compound water-based rust inhibitor comprises the following components in mass fraction: 10-20 parts of nano-silicon dioxide, 5-10 parts of nano-aluminum oxide, 3.0-8.0 parts of a compound dispersing aid, 1.0-3.0 parts of a compound auxiliary rust inhibitor, 1.0-3.0 parts of a compound surfactant, 1.0-4.0 parts of a compound pH regulator, 1.0-3.0 parts of a compound defoaming agent, 1.0-3.0 parts of a compound bactericide, and 55-75 parts of deionized water; The particle size of the nano-silicon dioxide and the nano-aluminum oxide is controlled to be 30-50 nm; The compound dispersing aid is prepared by mixing 60-70% of sodium polyacrylate and 30-40% of polyvinylpyrrolidone in weight ratio; the compound surfactant is prepared by mixing 70-80% of sodium dodecyl sulfate SDS and 20-30% of fatty alcohol polyoxyethylene ether AEO in weight ratio; The compound auxiliary rust inhibitor is prepared by mixing 40-50% of benzotriazole BTA, 30-40% of decanoic acid, and 20-30% of dodecenyl succinic acid in weight ratio; The compound pH regulator is prepared by mixing 40-60% of citric acid and 40-60% of disodium hydrogen phosphate in weight ratio; The compound defoaming agent is prepared by mixing 80-90% of an organic silicon defoaming agent and 10-20% of a polyether defoaming agent in weight ratio; and the compound bactericide is prepared by mixing 25-35% of glutaraldehyde, 30-40% of triclosan, 20-30% of isothiazolinone, and 15-25% of phenoxyethanol in weight ratio.

2. The preparation method of the nano-SiO2-Al2O3 compound water-based antirust agent according to claim 1, characterized in that, The preparation method comprises the following steps: ①First, 55-75 parts of deionized water is added into a reaction kettle and heated to 50-60°C, and then the nano-silicon dioxide and the nano-aluminum oxide are added into the reaction kettle, and a stirrer is started, with the stirring speed controlled to be 300-500 rpm, and the stirring is continuously performed for 30-45 minutes; ②The compound dispersing aid is added into the above solution, and the stirring speed is increased to 500-700 rpm, and the stirring is performed for 15-25 minutes; ③The compound surfactant and the compound auxiliary rust inhibitor are sequentially added into the reaction kettle, the stirring speed is kept to be 500-700 rpm, and the stirring is performed for 30-45 minutes; ④The stirring speed is reduced to 200-400 rpm, and the compound pH regulator is slowly dropped into the reaction kettle until the pH value is stabilized in the range of 6-7; ⑤The compound defoaming agent is added into the reaction kettle, the stirring speed is kept to be 200-400 rpm, and the stirring is continuously performed for 5-10 minutes; ⑥Finally, the compound bactericide is added into the reaction kettle, the stirring speed is increased to 400-600 rpm, and the stirring is continuously performed for 5-10 minutes; ⑦After all the components are added, the stirring speed is increased to 800-1000 rpm, and the stirring is performed for 45-60 minutes until the water-based rust inhibitor is cooled to room temperature, and a high-efficiency and stable nano-SiO2-Al2O3 compound water-based rust inhibitor is obtained.

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