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
CN110938814BActive Publication Date: 2020-09-11YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2020-09-11

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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.
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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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