Preparation method of self-healing magnesium alloy corrosion-resistant coating by in-situ synthesis

An in-situ synthesis and magnesium alloy technology, which is applied in the coating process of metal materials, can solve the problems of combination, industrial adaptability, speed up the corrosion rate of magnesium alloys, and affect the application of magnesium alloys, etc., and achieve high promotional value, The effect of controllable corrosion performance and strong practicability

Active Publication Date: 2020-09-11
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these coatings have problems with the combination with the magnesium alloy substrate and industrial adaptability. Once the coating is damaged, the corrosion rate of the magnesium alloy will be accelerated, which will affect the application of the magnesium alloy.

Method used

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  • Preparation method of self-healing magnesium alloy corrosion-resistant coating by in-situ synthesis
  • Preparation method of self-healing magnesium alloy corrosion-resistant coating by in-situ synthesis
  • Preparation method of self-healing magnesium alloy corrosion-resistant coating by in-situ synthesis

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preparation example Construction

[0027] The preparation method of the self-repairing magnesium alloy corrosion-resistant coating adopting in-situ synthesis adopts the method of in-situ synthesis, which includes a surface pretreatment process, a solution preparation process and a synthesis reaction process, and the specific steps include:

[0028] S1. Magnesium alloy surface pretreatment:

[0029] First, the whole magnesium alloy is cut into a certain number of small magnesium alloy cylindrical substrates with the same shape by using a wire electric discharge machine; then the cut magnesium alloy small cylindrical substrates are used as the base material, and different types of sandpaper are used in four times. Grinding and polishing the magnesium alloy small cylindrical substrate, the first time using 400# sandpaper to grind the magnesium alloy small cylindrical substrate, the second time using 800# sandpaper to polish the magnesium alloy small cylindrical substrate, and the third time using 1500# sandpaper i...

Embodiment 1

[0042] S1. Magnesium alloy surface pretreatment: First, use a wire electric discharge machine to cut the AZ31 magnesium alloy into a small AZ31 magnesium alloy cylindrical substrate with a height of 5mm and a diameter of 10mm; then use the cut AZ31 magnesium alloy small cylindrical substrate as the base material , using different types of sandpaper to grind and polish the AZ31 magnesium alloy small cylinder substrate four times. For the first time, use 400# sandpaper to polish the AZ31 magnesium alloy small cylinder substrate. For the second time, use 800# sandpaper to polish the AZ31 The magnesium alloy small cylinder substrate is polished, the AZ31 magnesium alloy small cylinder substrate is polished with 1500# sandpaper for the third time, and the AZ31 magnesium alloy small cylinder substrate is polished with 2000# sandpaper for the fourth time, and then the AZ31 magnesium alloy small cylinder substrate is polished with a polishing machine. The magnesium alloy small cylindri...

Embodiment 2

[0054] S1. Magnesium alloy surface pretreatment: First, use a wire electric discharge machine to cut the AZ91 magnesium alloy into a small AZ91 magnesium alloy cylindrical substrate with a height of 5mm and a diameter of 10mm; then use the cut AZ91 magnesium alloy small cylindrical substrate as the base material , using different types of sandpaper to grind and polish the AZ91 magnesium alloy small cylinder substrate four times. For the first time, use 400# sandpaper to polish the AZ91 magnesium alloy small cylinder substrate. For the second time, use 800# sandpaper to polish the AZ91 The magnesium alloy small cylindrical substrate is polished, and the AZ91 magnesium alloy small cylindrical substrate is polished with 1500# sandpaper for the third time, and the AZ91 magnesium alloy small cylindrical substrate is polished with 2000# sandpaper for the fourth time, and then the magnesium alloy is polished with a polishing machine. The alloy small cylindrical substrate is polished; ...

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Abstract

The invention provides a preparation method of an in-situ synthesized self-repairing magnesium alloy corrosion-resistant coating. The method comprises the following specific steps: S1, using an electrospark wire cutting machine to cut magnesium alloy into a small cylindrical magnesium alloy matrix=, using different models of abrasive paper to grind and polish the small magnesium alloy cylindricalmatrix for four times, and using absolute ethyl alcohol for cleaning; S2, dissolving weighed protein powder into deionized water in a conical flask, and using a magnetic stirrer to stir a mixed solution so as to prepare a protein solution with a certain concentration; and S3, soaking the small cylindrical magnesium alloy matrix in a prepared protein solution, reacting for 1-12 hours under ultraviolet irradiation, enabling some groups in the protein to react with the surface of the small cylindrical magnesium alloy matrix, carrying out drying in a forced air drying oven after the reaction, andgenerating a layer of composite fiber membrane on the surface of the small cylindrical magnesium alloy matrix in situ. The preparation method is simple and efficient, is suitable for corrosion prevention of all general magnesium alloys, and is especially suitable for long-term corrosion prevention of magnesium alloys in a humid environment.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy surface engineering, in particular to a method for preparing a self-repairing magnesium alloy corrosion-resistant coating by in-situ synthesis. Background technique [0002] Magnesium alloy is the lightest engineering structural material, widely used in electronic communication, automobile transportation and national defense. However, since the electrode potential of magnesium is relatively negative, it is easy to form a primary battery with other impurity elements, and pitting corrosion occurs, resulting in poor corrosion resistance of magnesium and magnesium alloys. Therefore, usually magnesium alloys need anti-corrosion treatment in use to improve the corrosion resistance of magnesium alloys. [0003] The most effective way to improve the corrosion performance of magnesium alloys is the surface coating process. In recent years, the surface protection technology of light metals such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/05C23C22/73
CPCC23C22/05C23C22/73
Inventor 彭秋明冯佳文杨猛李宏凯
Owner YANSHAN UNIV
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