Method for preparing novel conductive composite anticorrosive coating

A technology of anti-corrosion coating and preparation process, which is applied in the field of preparation of new conductive composite anti-corrosion coatings, and can solve problems such as poor solubility, difficult processing, and reduced efficiency

Active Publication Date: 2012-10-03
常熟市通顺纺织有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the rigidity of the chain and the strong interaction between the chains, the polypyrrole and polyaniline coatings prepared separately have the disadvantages of poor solubility and difficult processing,

Method used

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  • Method for preparing novel conductive composite anticorrosive coating
  • Method for preparing novel conductive composite anticorrosive coating
  • Method for preparing novel conductive composite anticorrosive coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1:: 0.01mol p-toluenesulfonic acid is dissolved in 200ml water and is mixed with solution, adjusts the pH of this solution with NaOH solution to be 1.0, obtains solution A;

[0027] 2: Add 0.01M pyrrole and 0.1M aniline monomer to solution A, and pass nitrogen gas for 10 minutes to obtain solution B;

[0028] 3: In the three-electrode electrolytic cell, the treated copper substrate is used as the working electrode, the platinum sheet is used as the auxiliary electrode, the saturated calomel electrode is used as the reference electrode, and the solution B is used as the supporting electrolyte, and the cyclic voltammetry is used for polymerization, scanning Speed: 10mV / s, cycle times: 5 times. Rinse with distilled water after synthesis and dry to obtain a layer of high-density composite conductive polymer film C on the copper surface to be protected.

Embodiment 2

[0030] 1:: 0.02mol p-toluenesulfonic acid is dissolved in 200ml water and is prepared into a solution, and the pH of the solution is adjusted to 2.0 with NaOH solution to obtain solution A;

[0031] 2: Add 0.02M pyrrole and 0.1M aniline monomer to solution A, and pass nitrogen gas for 10 minutes to obtain solution B;

[0032] 3: In the three-electrode electrolytic cell, the treated copper substrate is used as the working electrode, the platinum sheet is used as the auxiliary electrode, the saturated calomel electrode is used as the reference electrode, and the solution B is used as the supporting electrolyte, and the cyclic voltammetry is used for polymerization, scanning Speed: 20mV / s, number of cycles: 10 times. Rinse with distilled water after synthesis and dry to obtain a layer of high-density composite conductive polymer film C on the copper surface to be protected.

Embodiment 3

[0034] 1:: 0.03mol p-toluenesulfonic acid was dissolved in 200ml water to prepare a solution, and the pH of the solution was adjusted to 3.0 with NaOH solution to obtain solution A;

[0035] 2: Add 0.02M pyrrole and 0.04M aniline monomer to solution A, and pass nitrogen gas for 10 minutes to obtain solution B;

[0036] 3: In the three-electrode electrolytic cell, the treated copper substrate is used as the working electrode, the platinum sheet is used as the auxiliary electrode, the saturated calomel electrode is used as the reference electrode, and the solution B is used as the supporting electrolyte, and the cyclic voltammetry is used for polymerization, scanning Speed: 30mV / s, cycle times: 15 times. Rinse with distilled water after synthesis and dry to obtain a layer of high-density composite conductive polymer film C on the copper surface to be protected.

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Abstract

The invention relates to a method for preparing a novel conductive polypyrrole/polyaniline composite anticorrosive coating. The method comprises the following steps of: dissolving p-toluenesulfonic acid into water, regulating the pH value of a solution to be an appropriate value, and adding pyrrole and aniline monomers to obtain a mixed solution; performing electrochemical synthesis by using a three-electrode system, wherein copper is taken as a working electrode, a platinum sheet is taken as an auxiliary electrode, and a reference electrode is a saturated calomel electrode; and performing electrochemical polymerization under certain electrical parameters by cyclic voltammetry to obtain a layer of conductive polypyrrole/polyaniline composite anticorrosive coating on the surface of the copper electrode. The conductive polymer coating generated on the surface of the copper has high adhesion and is uniform and compact; medium corrosion ions can be effectively hindered from penetrating the coating and permeating into the surface of a metal matrix for a long time; the composite coating effectively improves the corrosion potential of a copper matrix and reduces corrosion current; and in addition, after the prepared coating is damaged, a layer of passivating film can be quickly generated on the surface of the matrix so as to ensure that metal is free of corrosion.

Description

technical field [0001] The invention relates to a preparation method of a novel conductive composite anticorrosion coating, which belongs to the field of surface anticorrosion. Background technique [0002] With the gradual depletion of the three major fossil energy sources, energy issues have been receiving much attention in recent years, and the development of clean, efficient and sustainable new energy sources has become the trend of the situation. Proton exchange membrane fuel cell (PEMFC) has become a research hotspot because of its high energy conversion rate; low temperature fast start; environment friendly, zero emission; small size, easy to carry and so on. The bipolar plate is a key component for connecting PEMFC single cells in series to form a battery stack, which requires high electrical and thermal conductivity, good corrosion resistance and low cost. Metal materials have become the first choice, but the main challenge it faces is corrosion, which leads to a d...

Claims

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Application Information

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IPC IPC(8): C25D9/02
Inventor 潘太军汪涛薛文龙
Owner 常熟市通顺纺织有限责任公司
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