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Preparation method of water-soluble polyaniline nano particles serving as corrosion inhibitor

A technology of nano-particles and polyaniline, applied in the field of metal anti-corrosion, can solve the problems of hidden dangers to the health of workers, chromate pollution of the environment, etc., and achieve the effects of simple use, easy cleaning, and simple preparation methods

Inactive Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Before 1980, a large number of chromate and nitrite were used as water-soluble corrosion inhibitors at home and abroad. Although the anti-rust effect was relatively good, chromate polluted the environment, and nitrite would pose serious health risks to workers.

Method used

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  • Preparation method of water-soluble polyaniline nano particles serving as corrosion inhibitor
  • Preparation method of water-soluble polyaniline nano particles serving as corrosion inhibitor
  • Preparation method of water-soluble polyaniline nano particles serving as corrosion inhibitor

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preparation example Construction

[0029] The preparation method of water-soluble polyaniline nano particle corrosion inhibitor of the present invention specifically comprises the following steps:

[0030] First, add deionized water to the template agent PVP, and use an ultrasonic cleaner to completely dissolve the template agent; then add aniline to the completely dissolved template agent, and stir evenly at room temperature to obtain solution 1; add oxidant to solution 1, oxidant It is a mixture of ammonium sulfate and hydrochloric acid. Aniline undergoes oxidative polymerization reaction under the action of an oxidant. The reaction temperature is 2°C. After the reaction, centrifuge for 30 minutes in a centrifuge, remove the supernatant, and then neutralize it with dilute ammonia solution. Excess hydrochloric acid in the oxidizing agent, absolute ethanol and deionized water were washed until the solution was neutral, and vacuum-dried at 60° C. to obtain polyaniline nanoparticles as the final product.

[0031]...

Embodiment 1

[0035] The present invention, the preparation method of water-soluble polyaniline nanoparticle, comprises the following steps:

[0036] Step 1. Add 4.06g of polyvinylpyrrolidone and 60mL of deionized water into a 250mL three-neck flask equipped with a stirring paddle, use an ultrasonic cleaner to sonicate until completely dissolved, add 2mL of aniline, and stir at room temperature for 1 hour to obtain solution 1;

[0037] Step 2. Weigh 2.04g of ammonium persulfate and 40mL of 1mol / L hydrochloric acid solution to prepare an oxidant solution, slowly add it dropwise to solution 1, and stir at 2°C for 5h. The reaction formula is shown in formula (1);

[0038] Step 3. After the reaction is over, centrifuge for 30 minutes on a centrifuge (AXTG16G), remove the supernatant, then neutralize the excess hydrochloric acid with dilute ammonia solution, wash with absolute ethanol and deionized water until the solution is neutral. Vacuum drying, take a small amount of polyaniline powder and ...

Embodiment 2

[0040] The present invention, the preparation method of water-soluble polyaniline nanoparticle, comprises the following steps:

[0041] Step 1: Weigh 3.89g of polyvinylpyrrolidone and 50mL of deionized water into a 250mL three-necked flask, use an ultrasonic cleaner to sonicate until completely dissolved, add 2mL of aniline, and stir at room temperature for 1 hour to obtain solution 1;

[0042] Step 2. Weigh 3.21g of ammonium persulfate and 40mL of 1mol / L phosphoric acid solution to prepare an oxidant solution, slowly add it dropwise to solution 1, and stir at 0°C for 4h;

[0043] Step 3, after the reaction is finished, after neutralization with sodium bicarbonate solution, after centrifugal cleaning, the concentration of the corrosion inhibitor is prepared into a hydrochloric acid washing solution with a concentration of 0.5g / L, and the slow release efficiency to carbon steel after 2h is as high as 95.6%. , polarization curve (see Figure 4 ).

[0044] Parts not mentioned i...

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Abstract

The invention discloses a preparation method of water-soluble polyaniline nano particles serving as a corrosion inhibitor. The preparation method comprises the following steps: adding deionized water into a template agent; completely dissolving the template agent under the action of ultrasonic; adding aniline into the completely dissolved template agent, and carrying out uniform stirring at the room temperature to obtain a solution I; adding an oxidizing agent into the solution I to ensure that aniline participates an oxypolymerization reaction under the action of the oxidizing agent, wherein the reaction temperature is 0 to 2 DEG C; after the reaction is finished, carrying out refining and drying to obtain the final product, namely the polyaniline nano particles. Compared with the prior art, the corrosion inhibitor contains no nitrite, is simple to use, and can be used as long as being diluted with water, thereby being safe and environmentally friendly. The corrosion inhibitor obtained according to the preparation method is used after being diluted by 50 to 300 times of water; when the concentration of the corrosion inhibitor is 0.5 g / L, the corrosion inhibiting effect on carbon steel reaches up to 95.6 percent.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a preparation method of a water-soluble polyaniline nano particle corrosion inhibitor. Background technique [0002] The "China Corrosion Survey Report" shows that in 2003, the total loss of corrosion in my country reached more than 497.9 billion yuan, which was about 5% of the GDP of that year. The economic loss will be as high as 1.8 trillion yuan. Mr. Hou Baorong, a well-known marine protection expert and academician of the Academy of Engineering, and Professor Li Xiaogang of Beijing University of Science and Technology pointed out at the 2013 Marine Protection Materials and Engineering Application Symposium that the annual direct and indirect economic losses caused by corrosion in the country are more than typhoons, earthquakes, droughts, and floods. The sum of the economic loss caused by the fire and the fire is even greater. With the depletion of petroleum reso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02
Inventor 程庆利刘栓赵海超陶彬张卫华
Owner CHINA PETROLEUM & CHEM CORP
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