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A kind of magnesium alloy anodic oxidation electrolytic solution and magnesium alloy anodic oxidation method

An anodic oxidation and magnesium alloy technology, applied in the field of electrolyte, can solve the problems of polluting the environment, difficult control of processing voltage, and easy cracks

Active Publication Date: 2019-07-23
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of this, the present invention provides a magnesium alloy anodic oxidation electrolyte and a magnesium alloy anodic oxidation method. The technical problem to be solved is to overcome the pollution of the environment in the electrolyte for magnesium alloy anodic oxidation in the prior art, resulting in poor corrosion resistance, attached The force is not strong, the film formation is uneven, cracks are easy to occur, and the processing voltage is not easy to control, and defects such as local ablation are easy to occur

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  • A kind of magnesium alloy anodic oxidation electrolytic solution and magnesium alloy anodic oxidation method
  • A kind of magnesium alloy anodic oxidation electrolytic solution and magnesium alloy anodic oxidation method
  • A kind of magnesium alloy anodic oxidation electrolytic solution and magnesium alloy anodic oxidation method

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Effect test

Embodiment 1

[0065] Magnesium alloy sample: AZ31 magnesium alloy sheet;

[0066] Magnesium alloy anodizing electrolyte: the magnesium alloy anodizing electrolyte of Example 1 in Table 1;

[0067] Step 1: Prepare the magnesium alloy anodic oxidation electrolyte in Example 1: According to the concentration of each component of the magnesium alloy anodic oxidation electrolyte in Example 1 in Table 1, prepare the magnesium alloy anodic oxidation electrolyte to obtain;

[0068] Step 2: The magnesium alloy material is made into a sample through the following pretreatments: grinding, drilling, cleaning with distilled water, acetone ultrasound, cleaning with distilled water, and drying;

[0069] Step 3: Anodize the magnesium alloy sample in the magnesium alloy anodizing electrolyte prepared in step 1. Stainless steel is used as cathode and magnesium alloy is used as anode. Under stirring conditions, constant current anodic oxidation is carried out. The temperature of the electrolyte is controlled at 20°C ...

Embodiment 2

[0072] Magnesium alloy sample: AZ31 magnesium alloy sheet;

[0073] Magnesium alloy anodizing electrolyte: the magnesium alloy anodizing electrolyte of Example 2 in Table 1;

[0074] Step 1: Preparation of the magnesium alloy anodic oxidation electrolyte in Example 2: According to the concentration of each component of the magnesium alloy anodic oxidation electrolyte in Example 2 in Table 1, the magnesium alloy anodic oxidation electrolyte is prepared to obtain;

[0075] Step 2: The magnesium alloy material is made into a sample through the following pretreatments: grinding, drilling, cleaning with distilled water, acetone ultrasound, cleaning with distilled water, and drying;

[0076] Step 3: Anodize the magnesium alloy sample in the magnesium alloy anodizing electrolyte prepared in step 1. Stainless steel is used as cathode and magnesium alloy is used as anode. Under stirring conditions, constant current anodic oxidation is carried out. The temperature of the electrolyte is controll...

Embodiment 3

[0079] Magnesium alloy sample: AZ31 magnesium alloy sheet;

[0080] Magnesium alloy anodizing electrolyte: the magnesium alloy anodizing electrolyte of Example 3 in Table 1;

[0081] Step 1: Preparation of the magnesium alloy anodic oxidation electrolyte in Example 3: According to the concentration of each component of the magnesium alloy anodic oxidation electrolyte in Example 3 in Table 1, the magnesium alloy anodic oxidation electrolyte is prepared to obtain;

[0082] Step 2: The magnesium alloy material is made into a sample through the following pretreatments: grinding, drilling, cleaning with distilled water, acetone ultrasound, cleaning with distilled water, and drying;

[0083] Step 3: Anodize the magnesium alloy sample in the magnesium alloy anodizing electrolyte prepared in step 1. Stainless steel is used as cathode and magnesium alloy is used as anode. Under stirring conditions, constant current anodic oxidation is carried out. The temperature of the electrolyte is controll...

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Abstract

The invention provides a magnesium alloy anodic oxidation electrolyte and a magnesium alloy anodic oxidation method. The magnesium alloy anodic oxidation electrolyte comprises deionized water and thefollowing components including 5-80g / L of sodium hydroxide, 5-80g / L of sodium silicate, 10-70g / L of sodium tetraborate, 0.3-15g / L of tungsten carbide, 0.3-15g / L of polytetrafluoroethylene dispersion liquid and 0.1-5g / L of an anionic surfactant which are added into the deionized water according to the volume of the deionized water. The magnesium alloy anodic oxidation electrolyte provided by the invention is used for conducting magnesium alloy anodic oxidation and is simple in technology, the film forming process is easy to control, a smooth and uniform oxidation layer which is good in corrosion resistance is generated on the surface of magnesium alloy, in addition, the electrolyte does not contain harmful elements and meets the environment friendly requirements, and environment pollution is avoided.

Description

Technical field [0001] The invention relates to the technical field of electrolytes, in particular to a magnesium alloy anodic oxidation electrolyte and a magnesium alloy anodic oxidation method. Background technique [0002] Magnesium alloys are alloys based on magnesium and other elements. Its characteristic is: low density (1.8g / cm 3 Magnesium alloy or so), high strength, large elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than aluminum alloy, and good resistance to organics and alkali corrosion. The main alloying elements are aluminum, zinc, manganese, cerium, thorium, and a small amount of zirconium or cadmium. Currently the most widely used is magnesium aluminum alloy, followed by magnesium manganese alloy and magnesium zinc zirconium alloy. Mainly used in aviation, aerospace, transportation, chemical, rocket and other industrial sectors. It is the lightest metal among practical metals. The specific gravity of magnesium is ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30
CPCC25D11/30
Inventor 屠晓华
Owner JIAXING UNIV
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