CN106498404A - A kind of water-based metal anti-rust transparent microemulsion and its preparation method and application - Google Patents

Abstract

The invention belongs to metal rust preventing field, discloses a kind of water-based metal anti-rust transparent microemulsion and preparation method thereof and the application in metal rust preventing.The water-based metal anti-rust transparent microemulsion is prepared from by extraordinary oiliness antirust agent, oiliness co-emulsifier, emulsifying agent and polar organic matter；The quality of oiliness co-emulsifier is 15 times of extraordinary oiliness antirust agent quality；The quality of emulsifying agent is 1 10 times of extraordinary oiliness antirust agent quality；The quality of polar organic matter is 0.5 5 times of extraordinary oiliness antirust agent quality.Gained microemulsion appearance transparent, molecular particle size is below 200 nanometers, it is easy to enter in the micropore of metal surface, forms firm adsorbed film, plays preferable rust-proof effect, with good storage stability.Compared with untreated metal sample, after the aqueous transparent microemulsion for obtaining of the invention dilutes 25 times, the resistance to neutral salt spray time substantially increases.

Description

A kind of water-based metal antirust transparent microemulsion and its preparation method and application

technical field

The invention belongs to the field of metal antirust, and in particular relates to a water-based metal antirust transparent microemulsion, a preparation method thereof and an application in metal antirust.

Background technique

The function of the antirust agent is to form a strong adsorption film on the metal surface to inhibit the contact of oxygen and water, especially water, on the metal surface, so that the metal will not rust. Generally speaking, rust inhibitors used as additives must have sufficient adsorption to metals and solubility in oil, so rust inhibitors are composed of strong polar groups and appropriate lipophilic groups. At present, the following types are widely used and have better effects: sulfonates (calcium sulfonate, sodium sulfonate and barium sulfonate), carboxylic acids and their salts (dodecenylsuccinic acid, zinc naphthenate) )Wait. These anti-rust agents must be dissolved in solvent oil and used by soaking or coating to form an oil film on the surface of the metal workpiece to prevent the rusting effect of oxygen and water on the metal. The recent patents also carry out polar adsorption improvement on the basis of oily anti-rust. For example, CN105602698A prepared by dissolving oily antirust agent in base oil; CN105441174A added composite polyvinyl alcohol and nano silicon dioxide in base oil, so that antirust oil can form a good adsorption film on the surface of pump valve parts, forming The adsorption film is uniform and stable, and the antirust performance is enhanced. CN105482874A is an oily steel antirust oil.

However, the volatilized low-boiling-point solvents in oil-soluble antirust agents will form high VOC, which will have adverse effects on the environment. Higher and higher environmental requirements require the use of water-soluble rust inhibitors. Currently widely used water-soluble rust inhibitors mainly include sodium nitrite, potassium dichromate, trisodium phosphate, diammonium hydrogen phosphate, sodium benzoate, triethanolamine, etc. CN105040006A discloses a water-based antirust agent for the metal outer cover of a generator, which consists of the following components in parts by weight: 3.5-5 parts of phosphoric acid, 2.2-3.5 parts of nitric acid, 3.2-4.2 parts of hydrochloric acid, 6- 10 parts, 3.2-4.5 parts of sodium sulfite, 2.2-3.5 parts of urotropine, 3.3-6.5 parts of sodium dodecylbenzenesulfonate, 6.5-10 parts of zinc sulfate, 40-65 parts of water. But all there is the problem of toxic effect and poor effect.

Someone once emulsified the oil-soluble antirust agent into an emulsion type antirust agent for rust prevention of metal workpieces. However, the molecular particle size of the emulsion formed by the general emulsification method is at the micron level, which is not conducive to storage. Moreover, its wettability to metal is poor, and it is difficult to form a dense adsorption film, which affects its antirust effect.

Contents of the invention

In order to overcome the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a water-based metal antirust transparent microemulsion.

Another object of the present invention is to provide a method for preparing the above-mentioned water-based metal antirust transparent microemulsion.

Another object of the present invention is to provide the application of the above-mentioned water-based metal antirust transparent microemulsion in the antirust of metal workpieces.

The object of the present invention is achieved through the following technical solutions:

A water-based metal antirust transparent microemulsion, which is prepared from a special oily antirust agent, an oily co-emulsifier, an emulsifier and a polar organic substance; the quality of the oily coemulsifier is the special oily antirust 1-5 times the quality of the rust agent; the quality of the emulsifier is 1-10 times the quality of the special oil-based rust inhibitor; the quality of the polar organic matter is 0.5-5 times the quality of the special oil-based rust inhibitor.

Preferably, the quality of the oily co-emulsifier is 2-3 times of the quality of the special oily antirust agent; the quality of the emulsifier is 3-5 times of the quality of the special oily antirust agent; 1-3 times the mass of rust agent.

The special oily antirust agent is more than one of sodium petroleum sulfonate, barium petroleum sulfonate, dodecenylsuccinic acid and triethanolamine borate; the oily co-emulsifier is stearic acid and oleic acid More than one of them; the emulsifier is a nonionic surfactant and/or anionic surfactant, wherein the nonionic surfactant is fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene One or more of ether, fatty amine polyoxyethylene ether, Span, Tween, alkyl glycoside and fatty acyldiethanolamine, and the anionic surfactant is fatty alcohol polyoxyethylene ether sulfate (AES), fatty acid methyl ester sulfonate salt (MES), secondary alkyl sulfonate (SAS) and sodium dihexyl sulfonate; the polar organic matter is alcohol amine compounds, specifically monoethanolamine, triethanolamine and One or more types of triethanolamine borate.

The preparation method of above-mentioned a kind of water-based metal antirust transparent microemulsion, according to the following steps:

(1) Heat the special oily antirust agent and oily co-emulsifier at 50-80°C to form a clear and transparent solution;

(2) Add the clear and transparent solution obtained in step (1) to the emulsifier under stirring conditions to obtain a mixed solution;

(3) adding the polar organic matter into the mixed solution obtained in step (2), and stirring at 50-80°C under heat preservation conditions until a clear and transparent solution is obtained;

(4) Continue adding hot water under agitation to obtain a water-based metal antirust transparent microemulsion.

The amount of hot water in step (4) is 10-100 times the quality of the special oil-based rust inhibitor, and the temperature of the hot water is 50-80°C.

The application of the above-mentioned water-based metal anti-rust transparent micro-emulsion in metal anti-rust, the application follows the following steps: dilute the water-based metal anti-rust transparent micro-emulsion with water to 2-5 times the volume to obtain an anti-corrosion solution; iron metal workpieces or nickel-plated Put the iron-based metal workpiece into the antiseptic solution prepared above and soak for more than 15 minutes, take it out, and dry it.

The above-mentioned metal parts that have undergone anti-rust treatment are subjected to a neutral salt spray test at 35°C with a 5% sodium chloride solution in accordance with the requirements of GB/T10125-1997.

Compared with the prior art, the present invention has the following advantages and beneficial effects: since the special oil rust preventive used in the present invention is an oil-soluble emulsifier, it should generally be used under solvent oil dissolution conditions, while general water-based rust preventives With poisonous reagents such as sodium nitrite, all can not reach environmental protection requirement; If adopt conventional emulsification method, the emulsion that obtains is easy to layer, and particle size is big, influences antirust effect; And the microemulsion that the present invention obtains, outward appearance is transparent Colloidal solution, stored at room temperature for more than three months without delamination, has good storage stability. Its particle size is small, and it is easy to enter the micropores of the metal surface, forming a firm adsorption film, which has a good antirust effect; the microemulsion has a good anticorrosion effect on the metal nickel plating layer, and can replace the existing anticorrosion Rust oil is used for anti-corrosion of metals such as iron products, iron-based nickel-plated products and chrome-plated products.

detailed description

The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

Example 1

(1) 4 grams of stearic acid, 3.2 grams of dodecenylsuccinic acid, and 2 grams of oleic acid are heated at 60° C. under stirring conditions to form a brownish-yellow clear and transparent solution;

(2) under stirring condition, add step (1) gained clear transparent solution in 4 gram alkyl glucoside (APG), 4 gram dihexyl succinate sodium sulfonate (MAS) and 4 gram Span 80, stir five Minutes to obtain a transparent mixed solution;

(3) Add 12 grams of triethanolamine borate to the mixed solution obtained in step (2), and stir at 60°C under heat preservation conditions until a clear and transparent solution is obtained;

(4) Continue to add hot water at 60° C. under agitation to a weight of 250 grams to obtain a water-based metal antirust transparent microemulsion. The obtained product is a light yellow transparent liquid, which is not delaminated for 3 months at room temperature.

Example 2

(1) 5 grams of stearic acid and 3.2 grams of dodecenylsuccinic acid are heated at 60° C. under stirring conditions to form a brownish-brown clear and transparent solution;

(2) Under stirring conditions, add the clear and transparent solution obtained in step (1) to 9 grams of fatty alcohol polyoxyethylene ether (AE09), 6 grams of nonylphenol polyoxyethylene ether (TX-10), and 4 grams of Span 80 , to obtain a transparent mixed solution;

(3) Add 12 grams of triethanolamine borate to the mixed solution obtained in step (2), and stir at 60°C under heat preservation conditions until a clear and transparent solution is obtained;

(4) Continue to add hot water at 60° C. under stirring conditions to a weight of 100 grams to obtain a water-based metal antirust transparent microemulsion. The obtained product is a yellow transparent liquid, which is not delaminated for 3 months at room temperature.

Example 3

(1) 6 grams of stearic acid, 5 grams of petroleum ether barium sulfonate, 5 grams of dodecenyl succinic acid, and 4 grams of oleic acid are heated at 60° C. with stirring to form a brownish-yellow clear and transparent solution;

(2) Under stirring conditions, add the clear and transparent solution obtained in step (1) to 5 grams of octylphenol polyoxyethylene ether (OP10) and 5 grams of secondary alkyl sulfonate (SAS), and stir to obtain a transparent mixed solution;

(3) Add 5 grams of triethanolamine to the mixed solution obtained in step (2), and stir at 60°C under heat preservation conditions until a clear and transparent solution is obtained;

(4) Continue to add hot water at 60° C. under stirring conditions to a weight of 100 grams to obtain a water-based metal antirust transparent microemulsion. The obtained product is a brownish-yellow transparent liquid, which is not delaminated for 3 months at room temperature.

Example 4

(1) 2 grams of stearic acid, 0.5 grams of dodecenylsuccinic acid, and 0.5 grams of oleic acid are heated at 60° C. under stirring conditions to form a brownish-yellow clear and transparent solution;

(2) Under stirring conditions, add step (1) gained clear and transparent solution in 3 grams of octylphenol polyoxyethylene ethers (OP10), 3 grams of sulfosuccinate disodium (MES) and 3 grams of Span 80, Stir to obtain a transparent mixed solution;

(3) Add 5 grams of triethanolamine to the mixed solution obtained in step (2), and stir at 60°C under heat preservation conditions until a clear and transparent solution is obtained;

(4) Continue to add hot water at 60° C. under stirring conditions to a weight of 100 grams to obtain a water-based metal antirust transparent microemulsion. The obtained product is a light yellow transparent liquid, which is not delaminated for 3 months at room temperature.

Example 5

(1) 4 grams of stearic acid, 3 grams of sodium petroleum ether sulfonate, 3 grams of triethanolamine borate, and 2 grams of oleic acid are heated at 60° C. under stirring conditions to form a brownish-yellow clear and transparent solution;

(2) under agitation, add step (1) gained clear transparent solution in 4 gram dihexyl sulfosuccinate sodium, 4 gram monosodium sulfosuccinate disodium (MES) and 4 gram Span 80, After stirring for five minutes, a transparent mixed solution was obtained;

(3) Add 10 grams of triethanolamine borate to the mixed solution obtained in step (2), and stir at 60° C. until a clear and transparent solution is obtained;

(4) Continue to add hot water at 60° C. under stirring conditions to a weight of 100 grams to obtain a water-based metal antirust transparent microemulsion. The obtained product is a light yellow transparent liquid, which is not delaminated for 3 months at room temperature.

After diluting the water-based metal antirust transparent microemulsion obtained in Examples 1-5 by 2-5 times, put the iron-based nickel-plated workpiece into it for soaking. After soaking for 15 minutes, put it into a 120°C oven to dry for half an hour. Then, at 35°C, use a sodium chloride solution with a mass concentration of 5% to conduct a neutral salt spray test according to the requirements of GB/T 10125-1997, and record the surface corrosion time. At the same time, deionized water was used as a comparative test for comparison. The results are shown in Table 1, the salt spray resistance time of the samples immersed in the water-based metal anti-rust transparent microemulsion prepared by the present invention is significantly improved compared with the untreated comparative example.

Table 1 The time for the samples to start to rust in the neutral salt spray test

sample number Dilution factor Salt spray test corrosion time Example 1 2 4 Example 2 5 4 Example 2 3 6 Example 4 2 2 Example 5 3 4 comparative example - 1

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (7)

1. a kind of water-based metal anti-rust transparent microemulsion, it is characterised in that：The water-based metal anti-rust transparent microemulsion is by extraordinary oil Property antirust agent, oiliness co-emulsifier, emulsifying agent and polar organic matter are prepared from；The quality of oiliness co-emulsifier is extraordinary oiliness 1-5 times of antirust agent quality；The quality of emulsifying agent is 1-10 times of extraordinary oiliness antirust agent quality；The quality of polar organic matter is 0.5-5 times of extraordinary oiliness antirust agent quality.

2. a kind of water-based metal anti-rust transparent microemulsion according to claim 1, it is characterised in that：The oiliness helps emulsifying The quality of agent is 2-3 times of extraordinary oiliness antirust agent quality；The quality of emulsifying agent is 3-5 times of extraordinary oiliness antirust agent quality； The quality of polar organic matter is 1-3 times of extraordinary oiliness antirust agent quality.

3. a kind of water-based metal anti-rust transparent microemulsion according to claim 1, it is characterised in that：The extraordinary oiliness is prevented Rust agent is one or more of petroleum sodium sulfonate, barium mahogany sulfonate, dodecenylsuccinic acid and triethanolamine borate；The oil Property co-emulsifier be one or more of stearic acid and Oleic acid；The emulsifying agent is nonionic surfactant and/or anion Surfactant, wherein nonionic surfactant are fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, fatty acid polyoxy One or more of vinyl Ether, aliphatic amine polyoxyethylene ether, span, tween, alkyl polyglucoside and diethanolamine of fat acyl, anion Surfactant be fatty alcohol polyoxyethylene ether sulfate, MES, secondary alkyl sulfonate and succinic acid two oneself One or more of ester sodium sulfonate；The polar organic matter is alcamine compound.

4. a kind of water-based metal anti-rust transparent microemulsion according to claim 1, it is characterised in that：The alcaminess chemical combination Thing is more than one of monoethanolamine, triethanolamine and triethanolamine borate.

5. the preparation method of a kind of water-based metal anti-rust transparent microemulsion according to any one of claim 1-4, its feature It is according to following operating procedure：

(1) extraordinary oiliness antirust agent and oiliness co-emulsifier are heated into clear transparent solutions at 50-80 DEG C；

(2) under agitation, step (1) gained clear transparent solutions are added in emulsifying agent, obtains mixed solution；

(3) again polar organic matter is added in step (2) gained mixed solution, stirring under 50-80 DEG C of heat-retaining condition is until obtain Arrive clear transparent solutions；

(4) continue to add hot water under agitation, obtain water-based metal anti-rust transparent microemulsion.

6. preparation method according to claim 5, it is characterised in that：The consumption of step (4) hot water is extraordinary oiliness 10-100 times of antirust agent quality, the temperature of hot water is 50-80 DEG C.

7. a kind of water-based metal anti-rust transparent microemulsion according to any one of claim 1-4 in metal rust preventing should With, it is characterised in that：The application is according to following steps：By water-based metal anti-rust transparent microemulsion 2-5 times of volume of dilute with water, Obtain impregnating fluid；Ferrous metal workpiece or nickel plating ferrous metals workpiece are put in the impregnating fluid of above-mentioned preparation soak 15 minutes with On, take out, dry.