Method for enhancing corrosion resistance of magnesium alloy material
A magnesium alloy, corrosion-resistant technology, applied in metal processing equipment, manufacturing tools, grinding machines, etc., can solve the problems of insufficient strength of the corrosion-resistant structural layer, difficult processing technology, and high processing costs, and achieves good prospects for popularization and application. Economic benefits and the effect of improving corrosion resistance
Pending Publication Date: 2022-07-01
HEFEI UNIV OF TECH
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Problems solved by technology
[0005] In order to solve the problems that the existing magnesium alloy corrosion resistance enhancement method is difficult in processing technology, high in processing cost, insufficient in strength of the corrosion resistance structure layer and easy to cause pollution to the environment; the invention provides a corrosion resistance enhancement method of magnesium alloy materials
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Embodiment 1
[0040] This embodiment provides a method for enhancing corrosion resistance of magnesium alloy materials, such as figure 1 shown, including the following steps:
[0041] S1: Material Preprocessing:
[0042] Surface pretreatment and cleaning are performed on the magnesium alloy material to form a mirror surface on the surface of the magnesium alloy material.
[0043] Specifically, the surface pretreatment process includes two stages of grinding and polishing and mirror surface treatment. In the process of grinding and polishing, 320, 800, 1200 and 2000 mesh abrasives were used to polish the surface of the magnesium alloy. In the process of mirror treatment, wool cloth and velvet are used for fine polishing in order to process the mirror surface on the surface of magnesium alloy.
[0044] In the cleaning process, acetone, anhydrous ethanol and deionized water are successively used to ultrasonically clean the magnesium alloy material, and then dry.
[0045]S2: Surface micros...
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Abstract
The invention belongs to the field of metal material processing, and particularly relates to a method for enhancing the corrosion resistance of a magnesium alloy material. The method comprises the following steps: S1, material pretreatment: carrying out surface pretreatment and cleaning treatment on a magnesium alloy material to form a mirror surface on the surface of the magnesium alloy material; s2, preparing a surface microstructure through femtosecond laser, wherein a femtosecond laser processing system with the laser wavelength being 800 nm, the pulse width being 104 fs and the frequency being 1 kHz is selected; processing parameters are set according to the material size and a preset processing scheme, different scanning strategies are adopted, and a microstructure composed of periodic grooves and ridges is prepared on the surface of the magnesium alloy material with the laser power not lower than 100 mW; and S3, heat treatment surface modification is conducted, specifically, the magnesium alloy material with the surface microstructure machined in the previous step is subjected to heat treatment for 2-4 h at the temperature of 250-300 DEG C. According to the process method, the problems that a traditional magnesium alloy corrosion-resistant treatment process is large in difficulty and high in machining cost, the strength of a corrosion-resistant structural layer is insufficient, and the environment is prone to being polluted are solved.
Description
technical field [0001] The invention belongs to the field of metal material processing, in particular to a method for enhancing corrosion resistance of magnesium alloy materials. Background technique [0002] Magnesium alloys are alloys with magnesium as the base element and other elements added. Magnesium alloys have a low density (1.8g / cm 3 left and right), high strength, large elastic modulus, good heat dissipation, good shock absorption, withstand Impact load Capability and other characteristics. Therefore, it is widely used in aviation, aerospace, transportation, chemical industry, rocket and other fields. The corrosion resistance of magnesium alloys is not outstanding. Therefore, during the application process, technicians usually improve the corrosion resistance of magnesium alloys through surface coating, surface structure modification and chemical treatment modification. [0003] The surface coating technologies used in the prior art mainly include: chemical con...
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IPC IPC(8): C23F15/00B23K26/352B24B1/00B24B27/00C22F1/06
CPCC23F15/00C22F1/06B23K26/355B24B1/00B24B27/0023
Inventor 吴思竹黄玖辉
Owner HEFEI UNIV OF TECH
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