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Method for performing continuous codeposition on Al-Mn alloy plating layer in molten salt system

An alloy coating and co-deposition technology, applied in the electrolysis process, electrolysis components and other directions, can solve the problem of lack of mass production, and achieve the effects of low production cost, increased probability, and improved metallographic structure

Inactive Publication Date: 2011-05-18
淄博德丰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few research reports in this area in our country, and this kind of domestic research is still in the laboratory stage, and there is no mass production yet.

Method used

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  • Method for performing continuous codeposition on Al-Mn alloy plating layer in molten salt system
  • Method for performing continuous codeposition on Al-Mn alloy plating layer in molten salt system
  • Method for performing continuous codeposition on Al-Mn alloy plating layer in molten salt system

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Experimental program
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Effect test

Embodiment 1

[0036] with NdCl 3 +MnCl 2 +AlCl 3 +NaCl+KCl is the electrolyte system, AlCl 3 150g of NaCl, 19g of NaCl, 25g of KCl; Fe plate is used as cathode, 99% aluminum plate is used as anode, electrolysis temperature is controlled at 180°C, pole distance is 2cm, and current density is controlled at 65mA / cm 2 The tank voltage is controlled at around 2V. For the first plating, add 2.2gMnCl 2 , 0.18gNdCl 3 , After making it dissolve for about 10 minutes, insert the cathode and anode for electroplating, and the electroplating time is 30 minutes. Plating for the second time, add MnCl 2 0.24g, insert the cathode and anode for electroplating, and the electroplating time is 30min. Plating for the third time, add MnCl 2 0.23g, insert the cathode and anode for electroplating, and the electroplating time is 30min. The contents of Al and Mn tend to be similar after three times of plating. NdCl can be added during 3 , but the total amount shall not exceed 0.4% of the total weight.

[0...

Embodiment 2

[0039] with CeCl 3 +MnCl 2 +AlCl 3 +NaCl+KCl is the electrolyte system, AlCl 3 150g of NaCl, 19g of NaCl, 25g of KCl; with steel plate as the cathode and 99% aluminum plate as the anode, the electrolysis temperature is controlled at 180°C, the pole distance is 2cm, and the current density is controlled at 65mA / cm 2 The tank voltage is controlled at around 2V. For the first plating, add 2.1gMnCl 2 , 0.6g CeCl 3 , After making it dissolve for about 10 minutes, insert the cathode and anode for electroplating, and the electroplating time is 30 minutes. Plating for the second time, add MnCl 2 0.24g, insert the cathode and anode for electroplating, and the electroplating time is 30min. Plating for the third time, add MnCl 2 0.237g, insert the cathode and anode for electroplating, and the electroplating time is 30min. The contents of Al and Mn tend to be similar after three times of plating. CeCl can be added during 3 , but the total amount shall not exceed 0.35% of the to...

Embodiment 3

[0042] with LaCl 3 +MnCl 2 +AlCl 3 +NaCl+KCl is the electrolyte system, AlCl 3 150g of NaCl, 19g of NaCl, 25g of KCl; steel plate is used as cathode, 99% aluminum plate is used as anode, electrolysis temperature is controlled at 180°C, pole distance is 2cm, current density is controlled at 69mA / cm 2 The tank voltage is controlled at around 2V. For the first plating, add 2.0gMnCl 2 , 0.25g LaCl 3 , After making it dissolve for about 10 minutes, insert the cathode and anode for electroplating, and the electroplating time is 30 minutes. Plating for the second time, add MnCl 2 0.22g, insert the cathode and anode for electroplating, and the electroplating time is 30min. Plating for the third time, add MnCl 2 0.19g, insert the cathode and anode for electroplating, and the electroplating time is 30min. The contents of Al and Mn tend to be similar after three times of plating. LaCl can be added during 3 , but the total amount shall not exceed 0.38% of the total weight.

[...

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Abstract

The invention relates to a method for performing continuous codeposition on an Al-Mn alloy plating layer in a molten salt system. A metal material (a steel plate) is used as a cathode and a pure aluminum material with the purity of over 99 percent is used as an anode. The method comprises the following steps of: adding a mixture of MnCl2, RClX, AlCl3, NaCl and KCl into an electrolytic bath; heating and melting; electrolyzing electrolytes, wherein R is a rare earth element, the electrolysis temperature is between 160 and 220 DEG C, the cathode-current density is controlled to be between 50 and 100 mA / cm<2>, and the bath voltage is controlled to be between 1.9 and 2.3V; stirring in the electrolytic bath, wherein the electroplating time is between 20 and 30 minutes; and plating for the second time and the third time after finishing plating for the first time, wherein the whole process is performed under the protection of argon. By the method, an Al-Mn plated alloy is directly obtained by one step through molten salt electrolysis and codeposition, and the appearance quality and the corrosion resistance of the plating layer after continuously plating under the environment can remain consistent basically.

Description

technical field [0001] The invention relates to a method for continuously co-depositing an Al-Mn alloy coating in a molten salt system. Background technique [0002] Since the invention of electrodepositing cryolite-alumina melt to prepare aluminum, it is still the main process for producing aluminum. By continuously improving the electrolyte composition and feeding methods, the current efficiency has reached more than 90%, and the power consumption is getting lower and lower. At present, it is developing in the direction of low temperature, energy saving and raw material saving electrodeposition. In 2005, the world's aluminum output ranked first in the world, becoming an important engineering metal second only to steel. Due to its good ductility, corrosion resistance and oxidation resistance, aluminum electrodeposited layers are widely used in anti-corrosion, electronics, decoration, thermal energy, optics, aviation, etc. After adding other elements to the aluminum matri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36C25C7/06
Inventor 梁寒冰颜如和甄美静
Owner 淄博德丰化工有限公司
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