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Manufacturing method of low-stress-gradient and long-service-life lead-based anode material

An anode material and low-stress technology, applied in metal material coating process, superimposed layer plating, coating, etc., can solve the problems of complex application environment conditions, short service life of lead-based anodes, low stress gradient, etc., to achieve The preparation method is simple, the cost is low, and the effect of stress decay is slow

Active Publication Date: 2018-05-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the many types of lead-based anodes currently on the market, the complex application environment conditions, and the short service life of lead-based anodes used in the field, the purpose of the present invention is to provide a lead-based anode material with low stress gradient and long life The preparation method is based on high-energy micro-arc spark deposition technology, combined with SEM, Raman and XRD detection technology analysis. The preparation method is simple, fast, and low in cost. , The service life of lead-based anodes involved in the electroplating industry ensures continuous production and improves the quality of cathode products

Method used

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  • Manufacturing method of low-stress-gradient and long-service-life lead-based anode material

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Embodiment 1

[0031] In this embodiment, the preparation method of the lead-based anode material with low stress gradient and high service life, the specific steps are as follows:

[0032] 1) Use 800# sandpaper to grind the ferritic stainless steel, then use 20wt% nitric acid to activate its surface, then clean it with acetone, and dry it.

[0033] 2) Using a lead-tin-silver alloy with a diameter of 4mm as the deposition electrode, a high-energy micro-arc cold welding machine is used to perform high-energy micro-arc spark surface infiltration of lead-tin-silver alloy on the surface of ferritic stainless steel. The electrical parameters are medium voltage 90V and medium frequency 900Hz. The deposition process was protected by side blowing 12L / min argon.

[0034] 3) 20wt% Pb-PbO prepared by hot pressing sintering method is used as the deposition electrode, and the PbO-based coating is directly deposited on the ferritic stainless steel substrate after the surface of the lead-infiltrated tin-si...

Embodiment 2

[0041] In this embodiment, the preparation method of the lead-based anode material with low stress gradient and high service life, the specific steps are as follows:

[0042] 1) Use 900# sandpaper to grind the ferritic stainless steel, then use 15wt% nitric acid to activate its surface, then clean it with acetone, and dry it.

[0043] 2) Using a lead-calcium-strontium alloy with a diameter of 4mm as the deposition electrode, a high-energy micro-arc cold welding machine is used to perform high-energy micro-arc spark surface infiltration of lead-calcium-strontium alloy on the ferritic stainless steel. The electrical parameters are medium voltage 80V and medium frequency 1100Hz. The deposition process was protected by side blowing 15L / min argon.

[0044] 3) 25wt% Pb-PbO prepared by the hot pressing sintering method is used as the deposition electrode, and the PbO-based coating is directly deposited on the ferritic stainless steel substrate after the surface lead-calcium-strontium...

Embodiment 3

[0051] In this embodiment, the preparation method of the lead-based anode material with low stress gradient and high service life, the specific steps are as follows:

[0052] 1) Use 1000# sandpaper to grind the ferritic stainless steel, then use nitric acid with a concentration of 10wt% to perform surface activation treatment on it, then clean it with acetone, and dry it.

[0053] 2) Using a lead-calcium alloy with a diameter of 4mm as the deposition electrode, a high-energy micro-arc cold welding machine is used to perform high-energy micro-arc spark surface infiltration of lead-calcium alloy on the ferritic stainless steel. The electrical parameters are medium voltage 70V and medium frequency 1500Hz. The deposition process was protected by side blowing 13L / min argon.

[0054] 3) 30wt% Pb-PbO prepared by hot pressing sintering method was used as the deposition electrode, and the PbO-based coating was directly deposited on the ferritic stainless steel substrate after the surfa...

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Abstract

The invention belongs to the field of wet metallurgy and particularly relates to a manufacturing method of a low-stress-gradient and long-service-life lead-based anode material. The manufacturing method utilizes a high-energy micro-arc spark deposition technology, namely the surface of a work piece is subjected to reinforcement treatment by utilizing electric energy having high energy density so as to form an alloyed or compact oxide surface reinforced layer, and thus the physical, chemical and mechanical properties of the surface of a lead-based anode can be improved. According to the technology, the electric energy is highly centralized in time and time, so a local material in a region is molten, an electrode material is transitioned to the surface of the work piece at a high speed and is diffused into the surface layer of the work piece to form a firmly combined alloy layer, and the binding force between a matrix and a film or between the films is improved. Meanwhile, gases containing different ingredients can be blown in the process, the conditions such as the flow rate, voltage, discharging frequency and output power of the gases are controlled, and the internal stress of an oxidation film can be released to a certain extent in a high-energy and high-temperature state, so the stress gradient is optimized.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to a preparation method of a lead-based anode material with low stress gradient and long service life. Background technique [0002] Because the lead-based anode material has: (1) good electrical conductivity; (2) strong corrosion resistance; (3) good mechanical strength and processing performance; (4) long service life and low cost; Good electrocatalytic performance and other characteristics, it not only has important applications in the field of tin-free steel electroplating, but also in hydrometallurgical fields such as electroplating tin (or zinc), lead-acid batteries, electrolysis (zinc, copper, manganese, etc.) and chlor-alkali industry It also has a wide range of applications. In these fields of hydrometallurgy, lead-based anode materials have long-term service in relatively harsh solution environments under the action of an electric field, such as: strong acid sol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C26/02
CPCC23C26/02C23C28/021C23C28/027
Inventor 王运凯李建中田彦文杨中东
Owner NORTHEASTERN UNIV
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