Electrolyte and method for preparing ceramic layer on surface of magnesium alloy by using electrolyte

An electrolyte preparation and electrolyte technology, which is applied in the direction of surface reaction electrolytic coating, electrolytic coating, coating, etc., can solve the problems of easy ablation and coking of resin, and achieve avoiding plastic ablation, high efficiency, and excellent binding force Effect

Pending Publication Date: 2021-08-06
西安强微电气设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an electrolyte, which solves the problem of easy ablation and coking of the resin embedded on the surface of the magnesium alloy existing in the prior art

Method used

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  • Electrolyte and method for preparing ceramic layer on surface of magnesium alloy by using electrolyte
  • Electrolyte and method for preparing ceramic layer on surface of magnesium alloy by using electrolyte
  • Electrolyte and method for preparing ceramic layer on surface of magnesium alloy by using electrolyte

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Experimental program
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Effect test

Embodiment 1

[0041] Step 1, add 10g / L sodium silicate, 20g / L sodium hexametaphosphate, 10g / L sodium hydroxide, 5g / L sodium fluoride, 50g / L glycerol, 20g / L potassium tartrate to deionized water in sequence sodium, to obtain the electrolyte; the electrolyte was fully stirred at room temperature for 30min, and set aside;

[0042] Step 2. Put plastic (plastic material: pps) AZ31B magnesium alloy computer keyboard (area is 6dm 2 ) placed in HF with a volume fraction of 15% and H with a volume fraction of 5% 2 SO 4 Wash in the mixed pickling pretreatment solution for 0.5min, and then wash with water;

[0043] Step 3. Put the plastic-containing AZ31B magnesium alloy computer keyboard treated in step 2 in the alkali cleaning pretreatment solution with a concentration of 30g / L trisodium phosphate and 30g / L sodium carbonate. The temperature is controlled at 80°C and cleaned. The time is 5min, and then washed with water;

[0044] Step 4. Place the AZ31B magnesium alloy computer keyboard processed...

Embodiment 2

[0050] Step 1. Add 20g / L potassium dihydrogen phosphate, 10g / L sodium hydroxide, 5g / L potassium fluoride, 80g / L hexamethylenetetramine, 8g / L sodium metavanadate, 2g to deionized water in sequence / L sodium citrate, 10g / L sodium pyrophosphate to obtain the electrolyte; fully stir the electrolyte at room temperature for 30min, and set aside;

[0051] Step 2. Place the AZ91D magnesium alloy computer case containing plastic (plastic material: PPS) (with an area of ​​12dm 2 ) into 8% (volume fraction) HF, 6% (volume fraction) HNO 3 The cleaning time in the pretreatment solution for pickling is 0.2min, and then washed with water;

[0052] Step 3. Then put the plastic-containing AZ91D magnesium alloy computer case treated in step 2 into 60g / L sodium hydroxide, the temperature is controlled at 60°C, the cleaning time is 3min, and then washed with water;

[0053] Step 4. Place the AZ91D magnesium alloy computer case treated in step 3 in the prepared electrolyte, connect the AZ91D mag...

Embodiment 3

[0058] Step 1. Add 15g / L disodium hydrogen phosphate, 10g / L potassium hydroxide, 10g / L sodium fluoride, 30g / L isopropanol, 5g / L ferric citrate, 5g / L vanadium to deionized water in sequence ammonium phosphate, 5g / L sodium gluconate, and 2g / L disodium edetate to obtain the electrolyte; the electrolyte was fully stirred at room temperature for 30min and set aside;

[0059] Step 2. Put plastic (material: PBT) AZ31B magnesium alloy case (area is 12dm 2 ) into 10% (volume fraction) HF, 5% (volume fraction) HNO 3 The cleaning time in the pre-pickling treatment solution is 1min, and then washed with water;

[0060] Step 3. Put the plastic-containing AZ31B magnesium alloy treated in step 2 into the cleaning solution of 40g / L sodium carbonate and 10g / L sodium hydroxide. The temperature is controlled at 85°C, the cleaning time is 4min, and then washed with water;

[0061] Step 4. Place the plastic-containing AZ31B magnesium alloy treated in step 3 in the prepared electrolyte, connect t...

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Abstract

The invention discloses an electrolyte and a method for preparing a ceramic layer on the surface of a magnesium alloy by using the electrolyte. A plastic strip is inlaid on the surface of the magnesium alloy. The method comprises the following steps that the electrolyte is prepared, the electrolyte comprises 6-30g / L of a film-forming agent, 4-10g / L of a passivating agent, 4-20g / L of a pH regulator, 10-50g / L of an ablation inhibitor and 1.5-10g / L of a corrosion inhibitor, and a solvent is deionized water; the magnesium alloy is sequentially subjected to acid washing and alkali washing; the treated magnesium alloy is placed in the electrolyte for micro-arc oxidation, and the ceramic layer is formed on the surface of the magnesium alloy; and the treated magnesium alloy is cleaned, sealed and dried. The ablation phenomenon of the plastic strip embedded on the magnesium alloy can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy treatment methods, relates to an electrolyte, and also relates to a method for preparing a ceramic layer on the surface of a magnesium alloy by using the electrolyte. Background technique [0002] Magnesium alloy has a series of unique advantages such as low density, high specific strength / rigidity, high damping, good thermal conductivity and electromagnetic shielding, and magnesium alloy products are easy to recycle and reuse, and have no pollution to the environment. It is called "21 century green engineering materials". At present, it has been widely used in the 3C field. At the same time, with the advent of the "5G era", although 5G has the advantages of high transmission and low delay, due to its short wavelength and poor ability to pass through obstacles, the use of an all-magnesium alloy shell will cause The signal of electronic products has the problem of weakening or disappearin...

Claims

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Application Information

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IPC IPC(8): C25D11/30
CPCC25D11/30C25D11/026
Inventor 陈鼎李均明
Owner 西安强微电气设备有限公司
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