A kind of preparation method and application of conductive polysiloxane-polyaniline anticorrosion coating

An anti-corrosion coating, polysiloxane technology, applied in conductive coatings, anti-corrosion coatings, coatings, etc., can solve the problem of insignificant electrochemical corrosion effect, improve anti-corrosion performance and practicability, reduce resource consumption, reduce Effects of Chemical Corrosion

Active Publication Date: 2021-12-31
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The annual loss caused by metal corrosion accounts for about 3% of the world's GDP. It is an urgent problem to be solved in contemporary industry and society. Various anti-corrosion methods such as cathodic protection, building passivation layer, composite coating and corrosion inhibitor have been obtained. Widely used, among which the construction of chromium trioxide passivation layer and organic coating are the two most commonly used methods, the construction of chromium trioxide passivation layer requires the use of carcinogenic chromate, while the traditional organic composite coating only has the function of isolating The effect of the corrosive medium on the metal substrate is not obvious to the electrochemical corrosion which accounts for the main proportion. Therefore, it is of great significance to develop a stable, environmentally friendly and efficient new anti-corrosion coating.

Method used

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  • A kind of preparation method and application of conductive polysiloxane-polyaniline anticorrosion coating
  • A kind of preparation method and application of conductive polysiloxane-polyaniline anticorrosion coating
  • A kind of preparation method and application of conductive polysiloxane-polyaniline anticorrosion coating

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Experimental program
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Effect test

Embodiment 1

[0037] (1) Preparation of PANIC film: use Shanghai CHI660E three-electrode electrochemical workstation, the reference electrode is SCE, the counter electrode is platinum wire, the working electrode is 304 stainless steel, polished with 800#~1000# water-phase sandpaper, and then respectively in acetone and ethanol After ultrasonic cleaning for 10 minutes, evaporate to dry naturally. At room temperature, the conductive PANIC film was prepared by cyclic voltammetry, and the electrolyte was 0.2mol / L H 2 SO 4 The aqueous solution was added with 0.2mol / L An, 0.2mol / L DL-MA and 0.2mol / L CAM, and the electrochemical parameters were -0.2~1.0V, 20mV / s and 20 cycles. The obtained samples were heat-treated at 60°C for 12 h in a blast drying oven.

[0038] (2) Preparation of POS suspension: In 50 mL of absolute ethanol, add 0.1 mL of distilled water, 0.2 g of hydrophobic silica nanoparticles, 0.03 mol / L DTMS, 0.02 mol / L TEOS, 0.05 mol / L GPTS and 0.025mol / L OA, the dissolution of OA requ...

Embodiment 2

[0041] (1) Preparation of PANIC film: use Shanghai CHI660E three-electrode electrochemical workstation, the reference electrode is SCE, the counter electrode is platinum wire, the working electrode is 304 stainless steel, polished with 800#~1000# water-phase sandpaper, and then respectively in acetone and ethanol After ultrasonic cleaning for 10 minutes, evaporate to dry naturally. At room temperature, the conductive PANIC film was prepared by cyclic voltammetry, and the electrolyte was 0.2mol / L H 2 SO 4 The aqueous solution was added with 0.2mol / L An, 0.2mol / L DL-MA and 0.2mol / L CAM, and the electrochemical parameters were -0.2~1.0V, 20mV / s and 20 cycles. The obtained samples were heat-treated at 60°C for 12 h in a blast drying oven.

[0042] (2) Preparation of POS suspension: In 50 mL of absolute ethanol, add 0.1 mL of distilled water, 0.3 g of hydrophobic silica nanoparticles, 0.03 mol / L DTMS, 0.02 mol / L TEOS, 0.05 mol / L GPTS and 0.025mol / L OA, the dissolution of OA requ...

Embodiment 3

[0045] (1) Preparation of PANIC film: use Shanghai CHI660E three-electrode electrochemical workstation, the reference electrode is SCE, the counter electrode is platinum wire, the working electrode is 304 stainless steel, polished with 800#~1000# water-phase sandpaper, and then respectively in acetone and ethanol After ultrasonic cleaning for 10 minutes, evaporate to dry naturally. At room temperature, the conductive PANIC film was prepared by cyclic voltammetry, and the electrolyte was 0.2mol / L H 2 SO 4 The aqueous solution was added with 0.2mol / L An, 0.2mol / L DL-MA and 0.2mol / L CAM, and the electrochemical parameters were -0.2~1.0V, 20mV / s and 20 cycles. The obtained samples were heat-treated at 60°C for 12 h in a blast drying oven.

[0046] (2) Preparation of POS suspension: In 50mL absolute ethanol, add 0.1mL distilled water, 0.4g hydrophobic silica nanoparticles, 0.03mol / L DTMS, 0.02mol / L TEOS, 0.05mol / L GPTS and 0.025mol / L OA, the dissolution of OA requires ultrasonic...

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Abstract

The invention belongs to the field of anti-corrosion of metals in saline solution, and specifically relates to a preparation method and application of a stable superhydrophobic conductive polysiloxane-polyaniline (PANIC-RA-POS) anti-corrosion coating. The method of the present invention utilizes the electrochemical method to construct a dense and stable conductive polyaniline film on the metal surface, adopts a spraying method to construct an external hydrophobic polysiloxane coating, and sprays self-adhesive (RA) between polyaniline and polysiloxane at the same time. ) to form a polysiloxane-polyaniline (PANIC-RA-POS) anti-corrosion coating and apply it to the field of metal surface anti-corrosion. The coating involved in the present invention is divided into internal conductive polyaniline film PANIC and external super-hydrophobic coating POS. PANIC has the unique advantages of spontaneous passivation of metal surfaces and slowing down pitting corrosion, effectively reducing electrochemical corrosion. The characteristic of spontaneously forming an air layer can effectively block the transmission of corrosive media and electrons, and effectively reduce chemical corrosion. The self-adhesive spray SA strengthens the bonding force between PANIC and POS, and effectively improves the metal anti-corrosion performance.

Description

technical field [0001] The invention belongs to the field of anticorrosion of metals in saline solution, and specifically relates to a preparation method and application of a stable superhydrophobic conductive polysiloxane-polyaniline anticorrosion coating. Background technique [0002] The annual loss caused by metal corrosion accounts for about 3% of the world's GDP. It is an urgent problem to be solved in contemporary industry and society. Various anti-corrosion methods such as cathodic protection, building passivation layer, composite coating and corrosion inhibitor have been obtained. Widely used, among which the construction of chromium trioxide passivation layer and organic coating are the two most commonly used methods, the construction of chromium trioxide passivation layer requires the use of carcinogenic chromate, while the traditional organic composite coating only has the function of isolating The effect of the corrosive medium on the metal substrate is not obvi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/08C09D5/24C09D179/02C09D183/04C25D9/02
CPCC09D5/08C09D5/24C09D179/02C09D183/04C25D9/02
Inventor 冯辉霞徐海东陈娜丽谭琳冶琴琴刘亚飞尚琼焦林宏
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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