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Carbon steel surface in-situ self-assembly metal-polyaspartic acid anti-corrosion film and preparation method and application thereof

A polyaspartic acid and self-assembly technology, applied in metal material coating process, measuring device, instrument and other directions, can solve the problem of sodium benzoate toxicity and other problems, and achieve the effect of low price, easy purchase and good corrosion resistance

Pending Publication Date: 2021-03-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, aminotrimethylene phosphonic acid is added to this self-assembled film-forming liquid, and the presence of phosphorus element will lead to eutrophication of the water body, and sodium benzoate contains a small amount of toxicity

Method used

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  • Carbon steel surface in-situ self-assembly metal-polyaspartic acid anti-corrosion film and preparation method and application thereof
  • Carbon steel surface in-situ self-assembly metal-polyaspartic acid anti-corrosion film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of self-assembled film-forming solution Take by weight 0.10% cobalt chloride, 0.10% polyaspartic acid (sodium), dissolve in deionized water, slowly add dropwise the nitric acid of 1mol / L, adjust the pH value, Keep the pH of the film-forming solution at 5.0.

[0022] (2) Carbon steel surface pretreatment The carbon steel samples were polished to a bright finish with 800#, 1200#, and 2000# sandpaper in sequence, and ultrasonicated in anhydrous B for 2 minutes, and then washed with water, rinsed with absolute ethanol, and dried.

[0023] (3) Preparation of cobalt-polyaspartic acid self-assembled film The pretreated carbon steel is vertically immersed in the self-assembled film solution, soaked for 30 minutes, taken out, rinsed with deionized water, absolute ethanol, and dried. Cobalt-polyaspartic acid self-assembled film that can be smooth and uniform on carbon steel surface.

Embodiment 2

[0025] (1) self-assembled film-forming liquid preparation takes by mass percentage 0.20% zinc nitrate, 0.2% polyaspartic acid (sodium), is dissolved in deionized water, slowly drips the nitric acid of 1mol / L, adjusts the pH value, makes The pH value of the film-forming solution was kept at 4.0.

[0026] (2) Carbon steel surface pretreatment The carbon steel samples were polished to a bright finish with 800#, 1200#, and 2000# sandpaper in sequence, and ultrasonicated in anhydrous B for 1 min, and then washed with water, rinsed with absolute ethanol, and dried.

[0027] (3) Preparation of zinc-polyaspartic acid self-assembled film. The pretreated carbon steel was vertically immersed in the self-assembled film-forming solution, soaked for 20 minutes, taken out, rinsed with deionized water, absolute ethanol, and dried. Zinc-polyaspartic acid self-assembled film that can be smooth and uniform on carbon steel surface.

Embodiment 3

[0029] (1) Preparation of self-assembled film-forming solution Take by weight 0.30% cerium nitrate, 0.50% polyaspartic acid (sodium), dissolve in deionized water, slowly add dropwise the nitric acid of 1mol / L, adjust the pH value, make The pH value of the film-forming solution was kept at 6.0.

[0030] (2) Carbon steel surface pretreatment. The carbon steel samples were polished to bright with 800#, 1200#, 2000# sandpaper in sequence, and ultrasonicated in anhydrous B for 0.5min, and then washed with water, rinsed with absolute ethanol, and dried. .

[0031] (3) Preparation of cerium-polyaspartic acid self-assembled film. Immerse the pretreated carbon steel vertically in the self-assembled film-forming solution, take it out after soaking for 10 minutes, wash it with deionized water, absolute ethanol, and dry it. A self-assembled thin film of cerium-polyaspartic acid that can be smooth and uniform on the surface of carbon steel.

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Abstract

The invention provides a carbon steel surface in-situ self-assembly metal-polyaspartic acid anti-corrosion film and a preparation method and application thereof. According to the preparation method, apretreated carbon steel sample is vertically immersed in a self-assembly film forming solution prepared in the step 1, taken out after being immersed for 10-60 min, washed with deionized water and absolute ethyl alcohol in sequence and blow-dried, and the self-assembly metal-polyaspartic acid anti-corrosion film on the surface of carbon steel is obtained. Environment-friendly organic molecule polyaspartic acid and various metal ions are used for preparing a film treatment solution, the metal polyaspartic acid self-assembly film is prepared on the surface of the carbon steel through the simpleand convenient method, the corrosion resistance of the carbon steel is improved, and the service life of the carbon steel is prolonged.

Description

technical field [0001] The invention relates to the technical field of carbon steel surface treatment, and more specifically relates to an in-situ self-assembled metal-polyaspartic acid anti-corrosion film on the surface of carbon steel and its preparation method and application. Background technique [0002] The corrosion and protection of steel has always been a research direction that the industry pays close attention to. The corrosion of steel not only brings serious losses to the national economy, but also causes environmental pollution and personal injury. Therefore, various protective methods against metal corrosion have been developed to slow down the corrosion rate of steel components. Among them, the chemical conversion coating, that is, the multifunctional protective film layer prepared on the metal substrate through the reaction between the metal and the chemical solution, plays an irreplaceable role in the corrosion protection of the metal. The two most widely...

Claims

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Application Information

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IPC IPC(8): C23C22/50G01N27/26G01N27/30
CPCC23C22/50G01N27/26G01N27/308
Inventor 王吉会王登胡文彬
Owner TIANJIN UNIV