High-stability multifunctional conductive super-hydrophobic anticorrosive coating, preparation method and application thereof

An anti-corrosion coating and high-stability technology, applied in anti-corrosion coatings, conductive coatings, coatings, etc., can solve the problems of poor processing performance, insufficient compactness, weak binding force, etc., and achieve excellent anti-corrosion performance and anti-corrosion Strong performance and practicability, anti-pitting effect

Active Publication Date: 2021-04-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor processing performance of polyaniline limits its wide application. Electrodeposition can directly form polyaniline film on the surface of stainless steel, which has become a new breakthrough. However, most of the polyaniline coatings obtained at present have weak binding force and poor stability. and the problem of insufficient compactness

Method used

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  • High-stability multifunctional conductive super-hydrophobic anticorrosive coating, preparation method and application thereof
  • High-stability multifunctional conductive super-hydrophobic anticorrosive coating, preparation method and application thereof
  • High-stability multifunctional conductive super-hydrophobic anticorrosive coating, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Preparation of conductive PANI film layer: Use 800# to 1000# water-phase sandpaper to polish the surface of 304SS, then ultrasonically clean it in acetone and ethanol solutions for 10 minutes, and evaporate to dry at room temperature for use. CHI660E three-electrode electrochemical workstation was used for electrodeposition experiments. Platinum wire, SCE and treated 304SS were the counter electrode, reference electrode and working electrode, respectively, with 0.25mol / L DL-MA and 0.2mol / L An aqueous solution As an electrolyte, the cyclic voltammetry (CV) method was used for electrodeposition at room temperature. Dry at 60°C for 12h.

[0041] (2) Preparation of superhydrophobic POS suspension: In 50mL absolute ethanol, add 0.1mL distilled water, 0.1g SiO 2 , 0.01mol / L HDTMS, 0.002mol / L TEOS, 0.002mol / L MPS, and magnetically stirred at 60°C for 24 hours to obtain a white superhydrophobic POS suspension.

[0042](3) Preparation of PANI-PU-POS coating: Spray a layer ...

Embodiment 2

[0044] (1) Preparation of conductive PANI film layer: Use 800# to 1000# water-phase sandpaper to polish the surface of 304SS, then ultrasonically clean it in acetone and ethanol solutions for 10 minutes, and evaporate to dry at room temperature for use. CHI660E three-electrode electrochemical workstation was used for electrodeposition experiments. Platinum wire, SCE and treated 304SS were the counter electrode, reference electrode and working electrode, respectively, with 0.25mol / L DL-MA and 0.2mol / L An aqueous solution As an electrolyte, the cyclic voltammetry (CV) method was used for electrodeposition at room temperature. Dry at 60°C for 12h.

[0045] (2) Preparation of superhydrophobic POS suspension: In 50mL absolute ethanol, add 0.1mL distilled water, 0.1g SiO 2 , 0.015mol / L HDTMS, 0.003mol / L TEOS, 0.003mol / L MPS, and magnetically stirred at 60°C for 24 hours to obtain a white superhydrophobic POS suspension.

[0046] (3) Preparation of PANI-PU-POS coating: Spray a laye...

Embodiment 3

[0048] (1) Preparation of conductive PANI film layer: Use 800# to 1000# water-phase sandpaper to polish the surface of 304SS, then ultrasonically clean it in acetone and ethanol solutions for 10 minutes, and evaporate to dry at room temperature for use. CHI660E three-electrode electrochemical workstation was used for electrodeposition experiments. Platinum wire, SCE and treated 304SS were the counter electrode, reference electrode and working electrode, respectively, with 0.25mol / L DL-MA and 0.2mol / L An aqueous solution As an electrolyte, at room temperature, the cyclic voltammetry (CV) method was used for electrodeposition, the potential range was -0.2 to 1.0 V, the scan rate was 20 mV / s, and the number of cycles was 20. The obtained sample PANI was placed at 60 ℃ drying for 12h.

[0049] (2) Preparation of superhydrophobic POS suspension: In 50mL absolute ethanol, add 0.1mL distilled water, 0.1g SiO 2 , 0.018mol / L HDTMS, 0.004mol / L TEOS, 0.004mol / L MPS, and magnetically sti...

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Abstract

The invention relates to the field of metal corrosion prevention, in particular to a high-stability multifunctional conductive super-hydrophobic anticorrosive coating, a preparation method and application thereof. The coating is a high-stability multifunctional conductive super-hydrophobic anticorrosive coating formed by combining a conductive PANI film layer, a super-hydrophobic layer and a waterborne polyurethane layer which are constructed on the surface of a stainless steel metal matrix through an electrochemical deposition and spraying method. The internal polyaniline layer (PANI) has good electrical conductivity and has the characteristics of spontaneous passivation and pitting corrosion retarding, the external super-hydrophobic layer (POS) can spontaneously form an air film in a corrosive medium, transmission of the corrosive medium and electrons can be efficiently blocked, meanwhile, the binding force between the POS and the PANI is effectively improved by introducing the waterborne polyurethane (PU), and the high-stability multifunctional conductive super-hydrophobic anticorrosive coating has the characteristics of environmental friendliness, high corrosion resistance and high practicability, and has important significance in corrosion prevention of 304SS and other conductive substrates.

Description

technical field [0001] The invention relates to the field of metal anti-corrosion, in particular to a high-stability multifunctional conductive super-hydrophobic anti-corrosion coating, a preparation method and an application. Background technique [0002] Metal corrosion causes huge economic losses and casualties to the world every year, and slowing down metal corrosion has always been a research hotspot in various countries. The current main measure is to build a passivation layer on the metal surface. However, carcinogenic chromate is used in the traditional passivation layer construction, which causes great harm to the environment and the human body. At the same time, coating traditional organic composite coatings is also one of the most commonly used methods, but traditional organic composite coatings have weak effects on electrochemical corrosion, which is the main corrosion type. Therefore, it is of great research significance to develop a new multi-functional anti-c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/02C09D5/08C09D5/24C08G73/02C09D183/08C09D175/04C25D9/02B05D5/00B05D1/38B05D7/14B05D7/24B05D1/02B05D3/00
CPCC09D179/02C09D5/08C09D5/24C08G73/0266C09D183/08C09D7/61C09D175/04C25D9/02B05D5/00B05D7/544B05D7/546B05D7/14B05D7/24B05D1/02B05D3/002C08K2201/011C08K3/36
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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