Al-Ni alloy electroplating method in low-temperature salt melting system

A low-temperature molten salt and system technology, applied in the field of electroplating, can solve problems such as difficult alloy plating, and achieve the effects of reducing the rate of defective products, improving ease of casting, and refining grains

Active Publication Date: 2012-03-28
淄博鸿润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have shown that Ni is electrodeposited on the cathode substrate from the molten salt system through an instantaneous nucleation mechanism in the early stage of crystal growth; sin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] Example 1:

[0017] SmCl 3 +NiCl 2 +AlCl 3 +NaCl+KCl is the electrolyte system, AlCl 3 It is 150g, NaCl is 19g, KCl is 25g; with 1mm thick low-carbon steel sheet as cathode, 99% aluminum plate as anode, current density is 55mA·cm -2 , The plating temperature is controlled at 460K, the plating time is controlled at 20min, and the cell voltage is controlled at 2V. For the first plating, add 1.6g NiCl 2 , 0.18g SmCl 3 After dissolving for 10 minutes, insert the cathode and anode for electroplating. The electroplating time is 20 minutes. For the second plating, add NiCl 2 It is 0.3g, insert the cathode and anode for electroplating, and the electroplating time is 20min. For the third plating, add NiCl 2 0.3g, insert cathode and anode for electroplating, electroplating time is 20min. SmCl can be added during the period 3 , But the total amount cannot exceed 0.4% of the total weight.

Example Embodiment

[0018] Example 2:

[0019] CeCl 3 +MnCl 2 +AlCl 3 +NaCl+KCl is the electrolyte system, AlCl 3 It is 150g, NaCl is 19g, KCl is 25g; with 1mm thick low-carbon steel sheet as cathode, 99% aluminum plate as anode, current density is 55mA·cm -2 , The plating temperature is controlled at 460K, the plating time is controlled at 20min, and the cell voltage is controlled at 2V. For the first plating, add 1.5g NiCl 2 , 0.6gCeCl 3 After dissolving for 10 minutes, insert the cathode and anode for electroplating. The electroplating time is 20 minutes. For the second plating, add NiCl 2 It is 0.3g, insert the cathode and anode for electroplating, and the electroplating time is 20min. For the third plating, add NiCl 2 0.3g, insert cathode and anode for electroplating, electroplating time is 20min. CeCl can be added during the period 3 , But the total amount cannot exceed 0.35% of the total weight.

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Abstract

The invention relates to an electroplating method, in particular to an Al-Ni alloy electroplating method in a low-temperature salt melting system. The Al-Ni alloy electroplating method in the low-temperature salt melting system is characterized in that in a pre- electrolyzing process, both a negative pole and a positive pole adopt aluminium sheets with the purity of 99 percent; and in an electroplating process, a mild steel sheet with the thickness of 1mm is taken as the negative pole, a pure aluminium material with the purity of more than 99 percent is taken as the positive pole, and an NiCl2+RClX+AlCl3+NaCl+KCl mixture is added into an electrolysis bath and is heated and melted into an electrolyte for electroplating. The invention has the advantages that aluminium and nickel chlorides are adopted as raw materials, and an additive is added, so that aluminium ions and nickel ions are electrolyzed and deposit together on negative-pole materials to generate a uniform and dense Al-Ni alloy plating; and through the adoption of the Al-Ni alloy electroplating method provided by the invention, low heat energy is required for producing the plating, the oxidation loss of the alloy metal is small, and the production cost is low.

Description

technical field [0001] The invention relates to an electroplating method, in particular to a method for electroplating an Al-Ni alloy in a low-temperature molten salt system. Background technique [0002] Molten salt electroplating is a new process that emerged with the development and application of molten salt electrochemistry. The so-called molten salt electroplating is a material treatment process in which a solid metal coating is obtained on the base material by using an external current in molten salt. Davis et al. reported in 1956 that in NaLiB 2 o 4 -NaLiWO 4 -WO 3 The refractory metal tungsten is electroplated in oxide molten salt, the working temperature is 900℃, and the thickness of the obtained coating is up to 20μm. In the 1960s, S.Senderoff and others successfully electroplated refractory metals in LiP-NaF-KF molten salt for the first time, and N.C.CooK and others also succeeded in alloying metal surfaces in molten salts, which is also a sign that molten s...

Claims

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Application Information

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IPC IPC(8): C25D3/66
Inventor 张晖甄美静耿加强陈立娇于兵谷城吴云霞张明明韩涛冯旭高新陈静
Owner 淄博鸿润新材料有限公司
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