CN110846115A - Anti-rust oil and preparation method thereof - Google Patents

Abstract

The invention discloses anti-rust oil and a preparation method thereof, and relates to the technical field of metal rust prevention. The technical key points are as follows: an anti-rust oil comprises the following components in parts by weight: dodecenylsuccinic acid: 5-10 parts; barium petroleum sulfonate: 50-60 parts; triethanolamine: 15-30 parts; engine oil: 150-200 parts; palmitic acid: 45-60 parts; 4-methylbenzotriazole: 10-20 parts; sodium dodecylbenzenesulfonate: 30-50 parts; buffer solution: 45-60 parts; water: 600 portions and 700 portions, the anti-rust oil prepared by the formula has the advantages of good anti-rust performance and low use cost.

Description

Anti-rust oil and preparation method thereof

Technical Field

The invention relates to the technical field of metal rust prevention, in particular to rust-preventive oil and a preparation method thereof.

Background

Corrosion is one of the main forms of fastener failure, causing significant damage to automobiles, motorcycles, and various vehicles and machinery. In order to prevent corrosion and reduce the loss of metal parts such as fasteners, various methods such as electroplating, hot dip galvanizing, etc. have been used.

Most of fasteners at present often adopt the electroplating process to rust-resistant, the electroplating process is rust-resistant effectual, but has very big shortcoming equally, for example the electroplating energy consumption is big, the electroplating waste liquid that produces pollutes greatly to and the problem that the waste liquid treatment cost is high, this fastener that leads to electroplating is with high costs, and often because its high power consumption high pollution's problem, all do not possess the ability of electroplating with many fastener manufacturing enterprises, then just need entrust the electroplating factory and carry out the electroplating, this also can lead to the problem that fastener cost increases, production cycle extension.

Therefore, a new solution is needed to solve the above problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the anti-rust oil which has the advantages of good anti-rust performance and low use cost.

In order to achieve the first purpose, the invention provides the following technical scheme:

an anti-rust oil comprises the following components in parts by weight:

dodecenylsuccinic acid: 5-10 parts;

barium petroleum sulfonate: 50-60 parts;

triethanolamine: 15-30 parts;

engine oil: 150-200 parts;

palmitic acid: 45-60 parts;

4-methylbenzotriazole: 10-20 parts;

sodium dodecylbenzenesulfonate: 30-50 parts;

buffer solution: 45-60 parts;

water: 600 portions and 700 portions.

By adopting the technical scheme, the dodecenylsuccinic acid has high solubility in engine oil, the same end of a molecule contains two carboxyl groups, the dodecenylsuccinic acid can be strongly adsorbed on a metal surface, the sulfonate in the barium petroleum sulfonate belongs to an electron-withdrawing group, the two groups jointly form the corrosion inhibitor, the electron-withdrawing capability of the sulfonate in the barium petroleum sulfonate is stronger than that of the carboxyl group, the sulfonate has acting force on electrons on the barium petroleum sulfonate and also acts force on electrons in the dodecenylsuccinic acid, the two substances are combined more firmly under the acting force between the molecules, and the dodecenylsuccinic acid can attach the barium petroleum sulfonate to the metal surface to form an effective antirust layer.

The nitrogen atom of the triethanolamine has lone pair electrons and weak alkalinity. The triethanolamine can increase the thickness of an anti-rust layer formed by the dodecenylsuccinic acid and the barium petroleum sulfonate and improve the compactness of a formed film, so that the possibility of rusting the metal surface is reduced; on the other hand, triethanolamine is also a water-soluble antirust agent, and can form an anionic surfactant with subsequent palmitic acid, so that the triethanolamine has good emulsifying capacity, reduces the surface tension in a system, and is beneficial to forming emulsion with water subsequently, so that the antirust agent disclosed by the invention can be better attached to the metal surface.

After the anti-rust oil is coated on the surface of the metal, the 4-methyl benzotriazole is positioned on the outermost layer and has an isolation effect on the anti-rust oil and the outside, and the 4-methyl benzotriazole forms a fine film structure on the surface of the anti-rust oil through subsequent treatment, so that the anti-rust oil can be attached to the surface of the metal for a longer time and more stably. The sodium dodecyl benzene sulfonate is an anionic surfactant, so that the engine oil, the palmitic acid and the water can be dispersed more uniformly, the interfacial tension between liquid and liquid is reduced, and the sodium dodecyl benzene sulfonate is helpful for crushing particles and preventing the particles from agglomerating so as to keep the stability of a dispersion system.

More preferably, the anti-rust oil also comprises 10-30 parts by weight of an antibacterial agent.

By adopting the technical scheme, the silver ions can destroy the breathing and cell division of bacteria, in addition, the silver ions can catalyze the oxygen activation in air and water to generate hydroxyl free radicals or active oxygen ions with strong oxidizing capability, bacteria can be prefabricated or killed, and the carrier nano silver is added, so that the anti-rust oil has strong antibacterial property, thereby providing a sterile and safe environment for the anti-rust oil to protect metal and avoiding the corrosion damage of microbial bacteria and the metal surface.

More preferably, the preparation method of the antibacterial agent is as follows:

adding 1g of carboxymethyl chitosan into 250mL of deionized water, uniformly stirring, adding 250mL of silver nitrate solution, stirring and heating to 50-60 ℃, reacting for 1h, cooling to 20-25 ℃, dropwise adding 1mmol/L sodium borohydride solution, and stirring and reacting for 0.5h to obtain the carboxymethyl chitosan.

By adopting the technical scheme, when the antibacterial agent is prepared, a great amount of-NH existing in carboxymethyl chitosan is mainly utilized₂With Ag⁺The coordination reaction occurs, the macromolecular chains of the carboxymethyl chitosan are stretched to form a porous cavity matrix material, and simultaneously, under the action of heating and stirring, silver ions can enter the internal structure of the carboxymethyl chitosan macromolecules and react with-NH on the molecular chains₂And carrying out coordination reaction to form stable carboxymethyl chitosan-nano silver.

More preferably, the concentration of the silver nitrate is 2 mmol/L.

By adopting the technical scheme, the carboxymethyl chitosan is as nontoxic as chitosan, has basic performances of good film forming property, degradability, biocompatibility and the like, has good adsorption capacity on metal ion silver due to the existence of amino in the chitosan, and can react with silver nitrate with proper concentration and the carboxymethyl chitosan to produce the antibacterial agent with good effect.

More preferably, the rust preventive oil further comprises 0.01 to 0.1 parts by weight of silver powder.

By adopting the technical scheme, the silver has a strong bactericidal effect, can prevent microorganisms from breeding and destroy DNA structures of the microorganisms, thereby killing most of bacteria and microorganisms in the anti-rust oil, greatly inhibiting the microbial corrosion destructive effect of the bacteria and metal parts, improving the content of the silver in the antibacterial agent by directly adding the silver powder, and improving the bactericidal effect.

More preferably, the silver powder has a particle diameter of 0.01 to 10 μm.

By adopting the technical scheme, the silver powder with smaller particle size can form a large amount of tiny spherical or approximately spherical particles in the antirust oil, the particles have large specific surface area and strong adhesion performance with metal, can stably adsorb a large amount of oil molecules, form a stable antirust oil film on the metal surface, and better prevent the corrosion of harmful substances such as water, oxygen, acid, alkali, salt and the like in the environment on metal parts, thereby improving the antirust capacity of the metal parts.

More preferably, the buffer solution is a mixture of sodium carbonate and sodium bicarbonate, and the pH is controlled to be between 10 and 11.5.

By adopting the technical scheme, the corrosion of the metal is a galvanic reaction in nature, hydrogen ions or ions in a high oxidation state are required to participate, and the corrosion resistance of the metal in an alkaline solution is good because the hydrogen ion concentration is low and the ions in the high oxidation state are not contained generally under the alkaline environment, namely the pH value is more than 7 (at normal temperature).

The invention aims to provide a preparation method of anti-rust oil, and the anti-rust oil prepared by the method has the advantages of good anti-rust performance and low use cost.

In order to achieve the second purpose, the invention provides the following technical scheme:

a preparation method of anti-rust oil comprises the following steps:

(1) adding dodecenylsuccinic acid and barium petroleum sulfonate into engine oil at the same time, stirring for 1.5-2h, adding triethanolamine, heating to 50-80 ℃, and stirring for dissolving for 1-2 h;

(2) adding palmitic acid into the emulsification system in the step (1), heating to 40-50 ℃, stirring for 0.5-1h, then adding sodium dodecyl benzene sulfonate, and stirring uniformly;

(3) and (3) adding water and the buffer solution into the emulsification system in the step (2), stirring for 0.5-1h, adding 4-methylbenzotriazole, and stirring for 1-2h to obtain the anti-rust oil.

In summary, compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, dodecenylsuccinic acid and barium petroleum sulfonate are jointly used for forming the corrosion inhibitor, the combination of the two substances is firmer under the action force between molecules, and the dodecenylsuccinic acid can attach the barium petroleum sulfonate to the metal surface to form an effective antirust layer;

(2) the invention also adds the antibacterial agent, and the carrier nano silver is added, so that the anti-rust oil has stronger antibacterial property, thereby providing a sterile and safe environment for the anti-rust oil to protect metals and avoiding the corrosion damage of microbial bacteria and the metal surface;

(3) the invention also adds silver powder with particle diameter between 0.01-10 μm, the particles have large specific surface area and strong adhesion property with metal, can stably adsorb a large amount of oil molecules, forms stable antirust oil film on the metal surface, and can better prevent the corrosion of harmful substances such as water, oxygen, acid, alkali, salt and the like in the environment to parts, thereby improving the antirust capability.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention is described in detail below with reference to the figures and examples. It is to be noted that those not indicated for specific conditions, carried out under the conventional conditions or conditions recommended by the manufacturer, and those not indicated for the reagents or equipment, are conventional products which can be obtained by commercially purchasing them.

Example 1: the rust preventive oil comprises the components in parts by weight shown in Table 1 and is prepared by the following steps:

(1) adding dodecenylsuccinic acid and barium petroleum sulfonate into engine oil at the same time, stirring for 2h, adding triethanolamine, heating to 50 ℃, and stirring for dissolving for 2 h;

(2) adding palmitic acid into the emulsification system in the step (1), heating to 40 ℃, stirring for 1h, then adding sodium dodecyl benzene sulfonate, and stirring uniformly;

(3) and (3) adding water and the buffer solution into the emulsification system in the step (2), stirring for 1h, adding 4-methylbenzotriazole, and stirring for 2h to obtain the anti-rust oil.

Wherein the buffer solution is a mixed solution of sodium carbonate and sodium bicarbonate, and the pH is controlled between 10 and 11.5.

Examples 2 to 6: an anti-rust oil which is different from that of example 1 in that each component and the corresponding parts by weight thereof are shown in Table 1.

TABLE 1 Components and parts by weight of examples 1-6

Example 7: a method for producing an anti-rust oil, which is different from that of example 1 in that 10 parts of an antibacterial agent is further added in step (3), and the antibacterial agent is obtained by the following production steps:

adding 1g of carboxymethyl chitosan into 250mL of deionized water, uniformly stirring, adding 250mL of silver nitrate solution with the concentration of 2mmol/L, stirring and heating to 60 ℃, reacting for 1h, cooling to 25 ℃, dropwise adding sodium borohydride solution with the concentration of 1mmol/L, and stirring and reacting for 0.5h to obtain the antibacterial agent.

Example 8: a method for producing an anti-rust oil, which is different from that of example 6 in that 30 parts of an antibacterial agent is further added in step (3), and the antibacterial agent is obtained by the following production steps:

adding 1g of carboxymethyl chitosan into 250mL of deionized water, uniformly stirring, adding 250mL of silver nitrate solution with the concentration of 2mmol/L, stirring and heating to 50 ℃, reacting for 1h, cooling to 20 ℃, dropwise adding sodium borohydride solution with the concentration of 1mmol/L, and stirring and reacting for 0.5h to obtain the antibacterial agent.

Example 9: a method for producing a rust preventive oil, which is different from example 1 in that 0.01 part of silver powder having a particle diameter of 0.01 to 10 μm is further added in step (3).

Example 10: a method for producing a rust preventive oil, which is different from that in example 6, in that 0.1 part of silver powder having a particle diameter of 0.01 to 10 μm is further added in step (3).

Comparative example 1: the difference from example 1 is that this comparative example does not add triethanolamine.

Comparative example 2: the difference from example 1 is that this comparative example uses a general commercially available rust preventive oil.

Test of rust inhibitive Property

The same batch of metals are selected, the metals are averagely divided into 12 groups after being polished, the 12 groups of metals are respectively coated by the anti-rust oil obtained in the examples 1-10 and the comparative examples 1-2, then the metals are completely placed in a salt spray box for neutral salt spray test, the test temperature is 35 ℃, the pH is adjusted to 6.5-7, the test time is 72h, the corrosion degree of each group of metals is detected after the salt spray test is finished, the corrosion degree is sequentially divided into 1-10 grades from light to heavy, and the test results are included in the following list 2.

And (3) testing results: as can be seen from the data in Table 2, examples 7 and 8 are the most preferable examples, comparative example 1 and comparative example 2 are the worst in rust inhibitive effect, while examples 1, 2, 3, 5 and 6 are better in rust inhibitive effect than comparative example 1 and comparative example 2, examples 9 and 10 are slightly worse in rust inhibitive effect than examples 7 and 8, and the rust inhibitive oil prepared by the formulation of the present invention has a good rust inhibitive effect.

Table 2 results of performance testing

Test object	Degree of corrosion (grade)
		Example 1	4
Example 2	4
		Example 3	4
Example 4	3
		Example 5	4
Example 6	4
		Example 7	2
Example 8	2
		Example 9	3
Example 10	3
		Comparative example 1	5
Comparative example 2	6

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (8)

1. The anti-rust oil is characterized by comprising the following components in parts by weight:

dodecenylsuccinic acid: 5-10 parts;

barium petroleum sulfonate: 50-60 parts;

triethanolamine: 15-30 parts;

engine oil: 150-200 parts;

palmitic acid: 45-60 parts;

4-methylbenzotriazole: 10-20 parts;

sodium dodecylbenzenesulfonate: 30-50 parts;

buffer solution: 45-60 parts;

water: 600 portions and 700 portions.

2. The rust preventive oil according to claim 1, further comprising 10 to 30 parts by weight of an antibacterial agent.

3. The rust preventive oil according to claim 2, characterized in that the antibacterial agent is prepared by the following method:

adding 1g of carboxymethyl chitosan into 250mL of deionized water, uniformly stirring, adding 250mL of silver nitrate solution, stirring and heating to 50-60 ℃, reacting for 1h, cooling to 20-25 ℃, dropwise adding 1mmol/L sodium borohydride solution, and stirring and reacting for 0.5h to obtain the carboxymethyl chitosan.

4. The rust preventive oil according to claim 3, wherein the concentration of silver nitrate is 2 mmol/L.

5. The rust preventive oil according to claim 1, further comprising 0.01 to 0.1 parts by weight of silver powder.

6. The rust preventive oil according to claim 5, wherein the silver powder has a particle diameter of 0.01 to 10 μm.

7. The rust preventive oil according to claim 1, wherein the buffer solution is a mixture of sodium carbonate and sodium bicarbonate, and the pH is controlled to be between 10 and 11.5.

8. The method for producing a rust preventive oil according to any one of claims 1 to 7, characterized by comprising the steps of:

(1) adding dodecenylsuccinic acid and barium petroleum sulfonate into engine oil at the same time, stirring for 1.5-2h, adding triethanolamine, heating to 50-80 ℃, and stirring for dissolving for 1-2 h;

(2) adding palmitic acid into the emulsification system in the step (1), heating to 40-50 ℃, stirring for 0.5-1h, then adding sodium dodecyl benzene sulfonate, and stirring uniformly;

(3) and (3) adding water and the buffer solution into the emulsification system in the step (2), stirring for 0.5-1h, adding 4-methylbenzotriazole, and stirring for 1-2h to obtain the anti-rust oil.

Images