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Method for preparing corrosion inhibition anion intercalated layered double hydroxides/oxide composite material and application

A technology of anion intercalation and composite materials, which is applied in the field of preparation and application of corrosion-inhibiting anion intercalation hydrotalcite/oxide composite materials, and can solve problems such as human body insecurity

Inactive Publication Date: 2009-04-29
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional anti-corrosion treatment process of metals and their alloys containing chromium or heavy non-ferrous metals is not safe for the human body. The development of chromium-free, effective and environmentally friendly anti-corrosion coatings has been the subject of painstaking research by researchers at home and abroad in the past few decades.

Method used

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  • Method for preparing corrosion inhibition anion intercalated layered double hydroxides/oxide composite material and application
  • Method for preparing corrosion inhibition anion intercalated layered double hydroxides/oxide composite material and application
  • Method for preparing corrosion inhibition anion intercalated layered double hydroxides/oxide composite material and application

Examples

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Embodiment 1

[0019] Implementation 1: Material Synthesis Method

example 1

[0020] Example 1: Preparation of one-step co-precipitation method of molybdate corrosion inhibitor intercalated Zn-Al hydrotalcite / nano-ZnO composite

[0021] Step: take a certain amount of Zn (NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O, ensure Zn / Al = 2.2 ~ 2.5 (molar ratio), dissolve in 200mL to remove CO 2 Distilled water, as a salt solution; make OH - / [Zn 2+ +Al 3+ ]=2.2 (mol ratio) NaOH is made into 2M solution, as alkaline solution; Take a certain amount of Na 2 MoO 4 .2H 2 O, make MoO 4 2- / Al 3+ The molar ratio is 2, dissolved in 100mL to remove CO 2 After distilling water, move it into a three-necked bottle, adjust the pH=9 to 10, and set aside; in a water bath at 75-80°C, add the salt solution and alkali solution drop by drop to the Na 2 MoO 4 In the three-necked bottle of the solution, control the pH value of NaOH to always keep it between 10.0 and 11.0. Nitrogen protection, reflux for 12 hours and then sink for 12 hours. Filter with suction, wash th...

example 2

[0022] Example 2: Molybdate corrosion inhibitor intercalated nickel-aluminum hydrotalcite / nano-nickel oxide composite

[0023]Step: Prepare Ni-Al-CO as Example 1 3 2- The hydrotalcite / nano-nickel oxide precursor was calcined at 620°C for 3h. After roasting, the samples were soaked in CO removal 2 In distilled water, add sodium molybdate salt solution and alkali solution (diluted ammonia water) drop by drop at the same speed at the same time, in N 2 Reaction for 4h under protection, satisfying MoO 4 2- / Al 3+ The molar ratio is 0.8-1.2, and the pH is 9.5. Filtration, CO removal 2 The filter cake was washed with distilled water until neutral, dried in an oven at 80°C, and ground.

[0024] The above examples further describe the technical solutions of the present invention, but the specific methods, formulations and instructions used are not limitations of the present invention.

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Abstract

The invention provides a corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material, a preparation method thereof and application of the corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material. The preparation method is as follows: corrosion-inhibiting anions are directly inserted between hydrotalcite layers by the one-step coprecipitation method and the roasting restoring method; the nano oxide is generated by means of in situ synchronization during the process of generation of hydrotalcite crystals by controlling the mixture ratio of divalent metal ions to trivalent metal ions, the pH value of a reaction solution and the reaction temperature; and the corrosion-inhibiting anionic intercalated hydrotalcite / nano oxide composite material with the anti-corrosive function is prepared. The invention is mainly characterized in that the in situ preparation method for the hydrotalcite / oxide composite material provided with a nano lamellar structure improves the release amount of a corrosion inhibitor and reduces the water absorption of a coating by leading into the corrosion inhibitor with the anti-corrosive function and the nano oxide which is generated in situ during the reaction process. The composite material can be used to be pigment of an anti-corrosive metallic coating system, and particularly has potential application value in improving the anti-corrosive performance of a magnesium alloy anti-corrosive coating.

Description

(1) Technical field [0001] The invention relates to a method for preparing a corrosion inhibitor intercalation hydrotalcite-like / nano-oxide composite material. The invention also relates to an anti-corrosion application method of the composite material. (2) Background technology [0002] The traditional anti-corrosion treatment process of metals and their alloys containing chromium or heavy non-ferrous metals is not safe for the human body. The development of chromium-free, effective and environmentally friendly anti-corrosion coatings has been the subject of painstaking research by researchers at home and abroad in the past few decades. . In recent years, in order to enhance the anti-corrosion performance of metals and their alloys and reduce costs, traditional coating techniques and new materials have been used to achieve anti-corrosion, environmentally friendly, beautiful, camouflage and durable (10 years or longer) coating systems It is a topic worthy of study. Theref...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D163/00C09D5/08C23F11/18
Inventor 王君何洋于湘李丹丹景晓燕张密林
Owner HARBIN ENG UNIV
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