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Magnesium alloy material, and method for treatment of surface of magnesium alloy material

A surface treatment, magnesium alloy technology, applied in the field of magnesium alloy materials, can solve the problems of reduced compactness, easy peeling of coating layers, oxidation of magnesium alloy materials, etc., to achieve improved reaction efficiency, good impact resistance and corrosion resistance, The effect of good corrosion and impact resistance

Inactive Publication Date: 2010-09-29
NAT INST OF ADVANCED IND SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the paint is directly applied to the magnesium alloy material, the surface of the magnesium alloy material will still be oxidized.
Oxidation reduces the closeness between the magnesium alloy material and the coating layer, and the coating layer is easy to peel off

Method used

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  • Magnesium alloy material, and method for treatment of surface of magnesium alloy material
  • Magnesium alloy material, and method for treatment of surface of magnesium alloy material
  • Magnesium alloy material, and method for treatment of surface of magnesium alloy material

Examples

Experimental program
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Effect test

Embodiment 1

[0115]Put the magnesium alloy material into a steam curing device at 140° C., and treat it with 20% diammonium hydrogen phosphate solution for 24 hours. Table 1 shows the film thickness, hardness, and corrosion resistance after the treatment. Samples soaked in saline solution such as figure 2 (a) shown. The SEM observation results of the samples after steam curing are as follows: image 3 (a) shown. like image 3 As shown in (a), tiny crystals can be seen after steam curing. also, Figure 4 In the shown X-ray diffraction figure, the peak of tiny Dittmarite can be seen clearly, and the peak of magnesium hydroxide ( Figure 4 A). In addition, according to Figure 5 As a result of elemental analysis shown in (a), it was found that phosphorus (P) was contained at a mass concentration of 1.5%.

Embodiment 2

[0117] The magnesium alloy material was soaked in 10% diammonium hydrogen phosphate solution at 120°C for 2 hours, then placed in a steam curing device at 140°C, and treated with 20% diammonium hydrogen phosphate solution for 24 hours. Table 1 shows the film thickness, hardness, and corrosion resistance after the treatment. Samples soaked in saline solution are shown in figure 2 (b). The SEM observation results of the samples after steam curing are displayed in image 3 (b). like image 3 As shown in (b), plate-like crystals can be seen after steam curing. from Figure 4 In the X-ray diffraction figure shown, can clearly see the peak of Dittmarite and the peak of magnesium hydroxide ( Figure 4 B).

Embodiment 3

[0119] The magnesium alloy material was soaked in 20% diammonium hydrogen phosphate solution at 120°C for 2 hours, then placed in a steam curing device at 140°C, and treated with 20% diammonium hydrogen phosphate solution for 24 hours. Table 1 shows the film thickness, hardness, and corrosion resistance after the treatment. Samples soaked in saline solution are shown in figure 2 (c). The SEM observation results of the samples after steam curing are displayed in image 3 (c). like image 3 As shown in (c), plate-like crystals can be seen after steam curing. from Figure 4 In the X-ray diffraction figure shown, can clearly see the peak of Dittmarite and the peak of magnesium hydroxide ( Figure 4 C). according to Figure 5 As a result of elemental analysis shown in (b), it was found that phosphorus (P) was contained at a mass concentration of 27.4%.

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Abstract

A magnesium alloy material is steam-cured with at least one compound selected from ammonium phosphate dibasic, ammonium dihydrogen phosphate and triammonium phosphate and water to form a complex of a phosphate-containing magnesium (e.g., Dittmarite) and magnesium hydroxide thereon. Thus, provided are: a magnesium alloy material having excellent corrosion resistance, impact resistance and the like; and a method for the treatment of the surface of a magnesium alloy material for producing a magnesium alloy material having excellent corrosion resistance, impact resistance and the like.

Description

technical field [0001] The invention relates to a magnesium alloy material and a surface treatment method for the magnesium alloy material. More specifically, the present invention relates to a magnesium alloy material that forms a phosphate-containing substance such as Dittmarite with a high crystallinity on its surface, and then makes the phosphoric acid-containing substance such as Dittmarite by performing steam curing using diammonium hydrogen phosphate or the like. Salt magnesium and magnesium hydroxide are compounded to form a strong coating. The present invention also relates to a surface treatment method for magnesium alloy materials. The surface treatment method is to form phosphate-containing substances such as Dittmarite with high crystallinity on the surface of magnesium alloy materials, and then use diammonium hydrogen phosphate and the like to perform steam curing, so that Phosphate-containing magnesium such as Dittmarite is composited with magnesium hydroxide t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/28C23C22/07
CPCC23C22/08C25D11/30C22C1/002Y10T428/31678C22C1/11
Inventor 恒松绢江井上耕三恒松修二坂本满
Owner NAT INST OF ADVANCED IND SCI & TECH
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