Preparation method of amino acid ion intercalated ZnAl-LDHs film

A technology of amino acid and znal-ldhs, which is applied in coating, metal material coating process, etc., can solve the problems of poor environmental performance of inorganic ion corrosion inhibitors, non-environmental protection of inorganic ion corrosion inhibitors, and easy pollution of the environment, so as to prevent Further corrosion, improved corrosion resistance, simple manufacturing process

Pending Publication Date: 2021-01-05
CHONGQING UNIV +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, aiming at the disadvantages that inorganic ion corrosion inhibitors are not environmentally friendly and easy to pollute the environment, the present invention provides a method for preparing ZnAl-LDHs film intercalated with amino acid ions, using organic acids as corrosion inhibitors (such as amino acids) , can be degraded in the natural environment, has the advantages of being green and non-toxic, and can overcome the defects of poor environmental performance of the prior art inorganic ion corrosion inhibitors

Method used

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  • Preparation method of amino acid ion intercalated ZnAl-LDHs film

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Embodiment 1

[0032]A method for preparing amino acid ion intercalation ZnAl-LDHs film, which is characterized in that it comprises the following steps:

[0033]Step S001, pretreating the surface of the magnesium alloy, specifically including the following steps: Step S0011, selecting the required size of magnesium alloy and using sandpaper to polish; the selected magnesium alloy is AZ31 magnesium alloy, and the cutting size is 20mm× 25mm×2.0mm, then use 400, 800, 1200, 2000 mesh SiC sandpaper for polishing. Step S0012, placing the polished magnesium alloy in an ethanol solution for ultrasonic cleaning for 15 minutes, and performing a cold air drying process. In step S0013, the magnesium alloy obtained in step S0012 is placed in a 2 mol / L sodium hydroxide solution for ultrasonic cleaning. In step S0014, the magnesium alloy obtained in step S0013 is placed in an ethanol solution for ultrasonic cleaning for 10 minutes, and placed in an oven for drying, and the drying temperature is 60°C. Using this st...

Embodiment 2

[0040]The difference between this embodiment and the first embodiment is that in the step S003, 0.444 g of 0.04 mol / L sodium laurate is specifically added dropwise to the mixed solution. In step S004, a 2mol / L sodium hydroxide solution is added to the solution obtained in step S003, and the pH of the solution is adjusted to 10. In step S005, the magnesium alloy obtained by pretreatment in step S001 and the solution obtained in step S004 are placed in a polytetrafluoroethylene autoclave for heating treatment; wherein the heating temperature of the polytetrafluoroethylene autoclave is 393K and the heating time is 12 hours. In step S006, the magnesium alloy treated in step S005 is cleaned with deionized water and placed in a vacuum for drying at a drying temperature of 60° C. and a drying time of 12 hours to obtain a ZnAl-La-LDHs film.

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Abstract

The invention discloses a preparation method of an amino acid ion intercalated ZnAl-LDHs film. The preparation method comprises the following steps: step S001, pretreating the surface of a magnesium alloy; S002, under the protection of nitrogen, dissolving a zinc nitrate hexahydrate solution and an aluminum nitrate nonahydrate solution in deionized water to form a mixed solution; Step S003, dropwise adding an organic acid solvent into the mixed solution; S004, adding a sodium hydroxide solution into the solution, and adjusting the pH value of the solution to 10; Step S005, putting the solutioninto a polytetrafluoroethylene autoclave for heating treatment; and step S006, cleaning and drying to obtain the amino acid ion intercalated ZnAl-LDHs film. The preparation method is simple; the ASPand La intercalated ZnAlLDHs film is prepared on the magnesium alloy substrate in situ through a hydrothermal method, corrosive liquid can be effectively prevented from permeating the magnesium alloysubstrate, and the corrosion resistance of the magnesium alloy can be remarkably improved.

Description

Technical field[0001]The invention relates to a preparation process of an ion-intercalated ZnAl-LDHs film, in particular to a preparation method of an amino acid ion intercalated ZnAl-LDHs film.Background technique[0002]Magnesium alloys have excellent comprehensive properties and are widely used. However, due to their active chemical properties, they have poor corrosion resistance in humid environments, and ordinary magnesium alloy oxide films are generally loose and porous, which cannot provide effective protection. In order to overcome the defects of poor corrosion resistance of magnesium alloys, anodizing treatment, surface coating treatment and chemical conversion coating treatment technology are usually used to coat a protective film on the magnesium alloy surface to prevent the magnesium alloy matrix from being oxidized, although it can significantly improve the magnesium The corrosion resistance of the alloy, the obtained oxide film and the magnesium alloy matrix have strong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/00
CPCC23C26/00
Inventor 方亮曾宪光吴芳胡佳唐艳宋玉涵
Owner CHONGQING UNIV
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