Modified anti-corrosion hydrotalcite, water-based intelligent anti-corrosion coating, preparation method and coating thereof

An anti-corrosion coating and hydrotalcite technology, applied in anti-corrosion coatings, coatings, epoxy resin coatings, etc., can solve the problems of poor anti-corrosion ability of water-based coatings, and achieve the effects of improving anti-corrosion ability, avoiding corrosion and improving dispersibility.

Active Publication Date: 2020-06-09
SHOUGANG CORPORATION
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  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a modified anti-corrosion hydrotalcite, a water-based intelligent anti-corrosion coating, a preparation method and a coating, so as to solve the technical problem of poor anti-corrosion ability of the water-based coating in the prior art

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  • Modified anti-corrosion hydrotalcite, water-based intelligent anti-corrosion coating, preparation method and coating thereof
  • Modified anti-corrosion hydrotalcite, water-based intelligent anti-corrosion coating, preparation method and coating thereof
  • Modified anti-corrosion hydrotalcite, water-based intelligent anti-corrosion coating, preparation method and coating thereof

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preparation example Construction

[0043] refer to figure 1 , the embodiment of the present invention provides a preparation method of modified anti-corrosion hydrotalcite, specifically comprising:

[0044] Step S10: drop the mixed solution of metal nitrate solution, sodium hydroxide and sodium tripolyphosphate into deionized water, stir and centrifuge to obtain anti-corrosion hydrotalcite.

[0045] Layered double hydroxide (Layered Double Hydroxide, LDH) is a general term for hydrotalcite (HT) and hydrotalcite-like compounds (Hydrotalcite-Like Compounds, HTLCs), a series of supramolecular materials assembled by intercalation of these compounds It is called hydrotalcite intercalation material (Layered DoubleHydroxides, LDHs). LDHs have a unique layered structure and are excellent anion exchange materials composed of positively and negatively charged mixed metal hydroxide layers with high metal dispersion. LDHs, especially heat-activated LDHs, are excellent anticorrosion materials because of their positively c...

Embodiment 1

[0084] (1) Preparation of anti-corrosion hydrotalcite: Boil deionized water and cool to 25°C. In parts by weight, 10 parts of Mg(NO 3 ) 2 ·6H 2 O and 5 parts Al(NO 3 ) 3 9H 2 O was dissolved in 50 parts of deionized water to form a metal nitrate solution at room temperature and an inert atmosphere. The content ratio of magnesium and aluminum in the metal nitrate solution was Mg:Al=2:1. At room temperature under an inert atmosphere, mix 3 parts of NaOH and 5 parts of Na 5 P 3 o 10 Dissolve in 50 parts of deionized water to make a mixed solution of sodium hydroxide and sodium tripolyphosphate. Then, the mixed solution of metal nitrate solution, sodium hydroxide and sodium tripolyphosphate was added dropwise into a beaker containing 100 parts of deionized water at the same time until the pH value of the final mixture was adjusted to 9.5 to obtain an alkaline mixture. The alkaline mixture was stirred at 350 rpm and 75°C for 8 hours to obtain a white paste, which was trans...

Embodiment 2

[0088] (1) Preparation of anti-corrosion hydrotalcite: Boil deionized water and cool to 25°C. In parts by weight, 10 parts of Mg(NO 3 ) 2 ·6H 2 O and 5 parts Al(NO 3 ) 3 9H 2 O was dissolved in 80 parts of deionized water to form a metal nitrate solution at room temperature and an inert atmosphere. The content ratio of magnesium and aluminum in the metal nitrate solution was Mg:Al=2:1. At room temperature under an inert atmosphere, mix 3 parts of NaOH and 5 parts of Na 5 P 3 o 10 Dissolve in 80 parts of deionized water to make a mixed solution of sodium hydroxide and sodium tripolyphosphate. Then, the mixed solution of metal nitrate solution, sodium hydroxide and sodium tripolyphosphate was added dropwise into a beaker containing 120 parts of deionized water at the same time until the pH value of the final mixture was adjusted to 9.5 to obtain an alkaline mixture. The alkaline mixture was stirred at 350 rpm and 75° C. for 8 hours to obtain a white paste, which was tra...

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Abstract

The invention discloses modified anti-corrosion hydrotalcite, a water-based intelligent anti-corrosion coating, a preparation method and a coating thereof, the preparation method of the modified anti-corrosion hydrotalcite comprises the following steps: dropwise adding a mixed solution of a metal nitrate solution, sodium hydroxide and sodium tripolyphosphate into deionized water for stirring and centrifuging to obtain anti-corrosion hydrotalcite; and adding the anti-corrosion hydrotalcite and dopamine into a buffer solution, and stirring and centrifuging to obtain the modified anti-corrosion hydrotalcite. According to the invention, the anticorrosion capability is improved by utilizing the capability of passivating metal by tripolyphosphate ions to form a protective film and the lamellar barrier effect of hydrotalcite; the surface of steel is coated with the coating prepared from the modified anti-corrosion hydrotalcite, and when the steel is corroded to generate metal cations, catechol groups on dopamine and the metal cations can form a cross-linked network structure, so that the coating is adsorbed to the surface of a steel matrix, and the effects of automatic protection and intelligent corrosion prevention are achieved.

Description

technical field [0001] The invention relates to a modified anticorrosion hydrotalcite, a water-based intelligent anticorrosion coating, a preparation method and a coating, and belongs to the technical field of coating preparation. Background technique [0002] Metal materials are widely used in many fields such as automobile production, shipbuilding, wire and building construction due to their good ductility, electrical conductivity and mechanical properties. Among them, steel is the basic structural material, known as the "skeleton of industry", which shows the incomparable status of steel materials in industry. However, once the steel material is corroded, its performance in all aspects will drop sharply. Therefore, the anticorrosion work of the steel material is essential. [0003] In terms of corrosion protection, there are methods of changing the internal structure or composition of metals, electrochemical protection methods, adding corrosion inhibitors, and anti-corro...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/04C09C3/08C09D163/00C09D5/08
CPCC09C1/40C09C3/04C09C3/08C09C3/006C09D163/00C09D5/08C08K9/08C08K3/26
Inventor 刁鑫林王胜荣曹建平杨建炜
Owner SHOUGANG CORPORATION
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