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Polyaniline modified metal-ceramic nano coating and preparation method thereof

A cermet and nano-coating technology, applied in the field of coatings, can solve problems such as hard precipitation hardness, and achieve the effects of preventing hard precipitation, high corrosion resistance and mechanical strength, and improving penetration resistance

Active Publication Date: 2010-02-10
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention overcomes the problems of easy formation of hard precipitates and low hardness of coating base material components in the prior art, and provides a polyaniline modified cermet nano coating that can be cured at room temperature and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Nano-quartz whisker treatment method: prepare 3wt% ethanol solution of silane coupling agent KH-560 (manufactured by Nanjing Shuguang Chemical Group Co., Ltd.), soak nano-quartz whisker in it for 24 hours, then filter and dry for later use.

[0053] Prepare polyaniline modified zinc powder as follows:

[0054] (a) Prepare a mixed aqueous solution of phosphoric acid and phytic acid: wherein the phosphoric acid is 2 mol / liter; the phytic acid is 0.5 mol / liter.

[0055] (b) Add aniline to the mixed aqueous solution of phosphoric acid and phytic acid, the concentration of aniline after mixing is: 0.5 mol / liter. Stirring was continued for 0.5 hours. Take 500ml of mixed aqueous solution of phosphoric acid, phytic acid and aniline, add 70g of 325 mesh zinc powder, and stir for 10 minutes, then pre-cool to 8°C.

[0056] (c) Prepare an aqueous solution of an oxidizing agent: select benzoyl peroxide as an oxidizing agent, and prepare a concentration of benzoyl peroxide of 1.5 m...

Embodiment 2

[0062] Nano-silicon carbide whisker treatment method: prepare 5wt% ethanol solution of silane coupling agent KH-570 (produced by Nanjing Shuguang Chemical Group Co., Ltd.), put nano-silicon carbide whiskers into it and soak for 24 hours, then filter and dry for backup use.

[0063] Add in the E44 epoxy resin of 55g and 25g xylene in the container, stir 10 minutes under 1000rpm with high-speed disperser. Then add 40g of 325-mesh conductive polyaniline prepared by the method mentioned in Example 1 and phytic acid-modified zinc powder, and continue stirring for 10 minutes at 1000rpm with a high-speed disperser to achieve uniformity. Component 1 of the paint.

[0064] Add 50g of NX-2040 curing agent and 40g of toluene into the container, and stir at 400rpm with a high-speed disperser for 15 minutes to achieve uniformity; then slowly add 25g of nano-silicon carbide whiskers, and stir with a high-speed disperser at 400rpm for 60 minutes, To achieve uniformity; use a three-roll mac...

Embodiment 3

[0067] Nano-silicon nitride whisker treatment method: prepare 5wt% ethanol solution of titanate coupling agent NDZ-105 (produced by Nanjing Shuguang Chemical Group Co., Ltd.), put nano-silicon nitride whiskers into it and soak for 45 hours, then Filter and dry for later use.

[0068] Add in the E44 epoxy resin of 70g and 25g xylene in the container, stir 10 minutes under 600rpm with high-speed disperser, reach uniform. Then add 70g of 325-mesh conductive polyaniline prepared by the method mentioned in Example 1 and phytic acid-modified zinc powder, and continue stirring for 40 minutes at 600rpm with a high-speed disperser to achieve uniformity. Component 1 of the paint.

[0069] Add 90g of 590 type curing agent and 70g of cyclohexanone in the container, and stir at 600rpm for 15 minutes with a high-speed disperser to achieve uniformity; then slowly add 45g of nano-silicon nitride whiskers, and stir at 600rpm for 40 Minutes to achieve uniformity; use a three-roll machine or a...

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Abstract

The invention relates to coating technology, in particular to a polyaniline modified metal-ceramic nano coating and a preparation method thereof to solve the problems that compositions of a base stockof the coating existing in the prior art are easy to form hard precipitation, and the coating has low hardness. The polyaniline modified metal-ceramic nano coating mainly comprises nano-whisker, polyaniline and phytic acid modified zinc powder, epoxy resin and a curing agent. The preparation method takes the epoxy resin as a binder and organically combines the metal zinc and the nono ceramic whisker, so that the coating has ductility. The nano-whisker ceramic material reinforces the epoxy coating, strengthens the ductility and the permeability resistance of the epoxy coating; and the polyaniline modified zinc powder improves the corrosion resistance of the coating. The coating is widely used for heavy-duty anticorrosion of petrochemical equipment, maritime facilities and traffic facilities.

Description

technical field [0001] The invention relates to coating technology, in particular to a polyaniline modified metal ceramic nano coating and a preparation method thereof. Background technique [0002] Zinc-rich coatings are widely used in the corrosion protection of petrochemical, marine facilities, and transportation facilities. Zinc-rich coatings can be divided into organic zinc-rich coatings and inorganic zinc-rich coatings according to different film-forming substances. Epoxy zinc-rich coatings are the most important type of organic zinc-rich coatings. The electrode potential of zinc is lower than that of iron, so the zinc in the epoxy zinc-rich coating can play the role of sacrificial anode protection; on the other hand, the epoxy zinc-rich coating also hinders the penetration of corrosive media, making the epoxy zinc-rich coating The coating has a very good anti-corrosion effect. [0003] Chinese patent CN1357581 reports an anti-corrosion and anti-static method for a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D7/12
Inventor 刘福春郝永胜韩恩厚柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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