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Magnesium alloy surface chemical coloring method

A surface chemistry, magnesium alloy technology, applied in the direction of metal material coating process, etc., can solve the problems of poor durability, uneven coloring on the surface of magnesium alloys, and achieve the effects of high corrosion resistance, dense coloring layer, and high bonding strength.

Inactive Publication Date: 2018-08-10
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for chemically coloring the surface of magnesium alloys, which solves the problems of uneven coloring and poor durability of the surface of magnesium alloys existing in the prior art

Method used

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  • Magnesium alloy surface chemical coloring method
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1, weigh Zn(H 2 PO 4 ) 2 and Mn(H 2 PO 4 ) 2 , add water and stir, the temperature of water is 60°C, so that Zn(H 2 PO 4 ) 2 and Mn(H 2 PO 4 ) 2 Completely dissolved, where Zn(H 2 PO 4 ) 2 The mass concentration is 2%, Mn(H 2 PO 4 ) 2 The mass concentration is 2%, then add Na 2 ZrF 6 Keep stirring, Na 2 ZrF 6 The mass concentration is 0.1%, when Na 2 ZrF 6 After complete dissolution, add KMnO 4 , KMnO 4 The mass concentration of the solution is 1%, and the solution is purple at this moment, and it is for subsequent use;

[0025] Step 2, carrying out rust and oil removal on the surface of the magnesium alloy, and then alkali-washing;

[0026] Step 3, put the magnesium alloy after surface derusting and degreasing into the solution prepared in step 1, and soak for 40 minutes;

[0027] Step 4. Take out the magnesium alloy soaked in step 3 and wash it in hot water. The temperature of the hot water is 75°C, and the washing time is 2.5 minutes;

...

Embodiment 2

[0030] Step 1, weigh Zn(H 2 PO 4 ) 2 and Mn(H 2 PO 4 ) 2 , add water and stir, the temperature of water is 50°C, so that Zn(H 2 PO 4 ) 2 and Mn(H2 PO 4 ) 2 Completely dissolved, where Zn(H 2 PO 4 ) 2 The mass concentration is 5%, Mn(H 2 PO 4 ) 2 The mass concentration is 1%, then add Na 2 ZrF 6 Keep stirring, Na 2 ZrF 6 The mass concentration is 0.05%, when Na 2 ZrF 6 After complete dissolution, add KMnO 4 , KMnO 4 The mass concentration of the solution is 0.5%, and the solution is purple at this moment, and it is for subsequent use;

[0031] Step 2, carrying out rust and oil removal on the surface of the magnesium alloy, and then alkali-washing;

[0032] Step 3, putting the magnesium alloy after surface derusting and degreasing into the solution prepared in step 1, and soaking for 0.5 hours;

[0033] Step 4. Take out the magnesium alloy soaked in step 3 and wash it in hot water. The temperature of the hot water is 70°C, and the washing time is 2 minute...

Embodiment 3

[0036] Step 1, weigh Zn(H 2 PO 4 ) 2 and Mn(H 2 PO 4 ) 2 , add water and stir, the temperature of water is 70°C, so that Zn(H 2 PO 4 ) 2 and Mn(H 2 PO 4 ) 2 Completely dissolved, where Zn(H 2 PO 4 ) 2 The mass concentration is 1%, Mn(H 2 PO 4 ) 2 The mass concentration is 5%, then add Na 2 ZrF 6 Keep stirring, Na 2 ZrF 6 The mass concentration is 0.15%, when Na 2 ZrF 6 After complete dissolution, add KMnO 4 , KMnO 4 The mass concentration of the solution is 1.5%, and the solution is purple at this moment, and it is for subsequent use;

[0037] Step 2, carrying out rust and oil removal on the surface of the magnesium alloy, and then alkali-washing;

[0038] Step 3. Put the magnesium alloy after surface derusting and degreasing into the solution prepared in step 1, and soak for 1 hour;

[0039] Step 4. The magnesium alloy soaked in step 3 is taken out and washed in hot water. The temperature of the hot water is 80° C., and the washing time is 3 minutes. ...

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Abstract

The invention discloses a magnesium alloy surface chemical coloring method. The magnesium alloy surface chemical coloring method comprises the steps that firstly, Zn(H2PO4)2 and Mn(H2PO4)2 are weighedand fetched, the Zn(H2PO4)2 and Mn(H2PO4)2 are added to water and stirred, the Zn(H2PO4)2 and the Mn(H2PO4)2 are completely dissolved, and it is guaranteed that the total mass concentration of the Zn(H2PO4)2 and the Mn(H2PO4)2 is 4%-6%; then, Na2ZrF6 is added, stirring continues, and the mass concentration of the Na2ZrF6 is 0.05-0.15%; after the Na2ZrF6 is completely dissolved, KMnO4 is added, the mass concentration of the KMnO4 is 0.5%-1.5%, and the solution is purple at the moment and stands for use; surface rust and oil removal and alkali washing-water washing are conducted on a magnesiumalloy, the magnesium alloy obtained after surface rust and oil removal is placed in the solution prepared in the beginning and is dipped, then the magnesium alloy is taken out and placed in hot waterfor washing, and then the colored magnesium alloy is obtained. The magnesium alloy surface chemical coloring method solves the problem that in the prior art, the color of the colored surface of the magnesium alloy is uneven and poor in durability.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy surface coloring, and in particular relates to a chemical coloring method for the surface of magnesium alloys. Background technique [0002] Magnesium alloy has been widely used in machinery, electronics, architectural decoration and other fields due to its abundant raw materials, low cost and easy processing. However, since the electrode potential of the magnesium alloy material is relatively negative, the magnesium alloy is easily oxidized even in an ordinary atmospheric environment. Due to the poor compactness of magnesium oxide formed after natural oxidation, the surface color of magnesium alloy is uneven, which cannot meet the requirements of modern aesthetic decoration. In order to make the surface color of magnesium alloy equipment and parts consistent, people have colored the surface of magnesium alloy, Anodizing or even micro-arc oxidation treatment, some have to be painted on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/05
CPCC23C22/05
Inventor 冯拉俊马会妮张小欢
Owner XIAN UNIV OF TECH
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