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Method for regulating and controlling brightness of nickel button appearance

A bright, nickel button technology, applied in the field of nickel electrolysis, can solve the problem of changing the physical appearance of nickel buttons, and achieve the effect of changing the physical appearance

Active Publication Date: 2021-06-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The discovery and use of inorganic oxidation and reduction substances are used to significantly change the physical appearance of the nickel buckle. During use, the stress balance of the nickel buckle and the separation of the plates will not be disturbed. At present, this preparation process for changing the physical appearance of the nickel buckle has not been reported in domestic and foreign literature.

Method used

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  • Method for regulating and controlling brightness of nickel button appearance
  • Method for regulating and controlling brightness of nickel button appearance
  • Method for regulating and controlling brightness of nickel button appearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add the inorganic reducing agent sodium pyrosulfate and hydrogen sulfide to the nickel button electrolyte, adjust the redox potential of the electrolyte to -75mv, filter and remove the solid precipitate, and prepare the nickel button electrolyte with a reducing environment.

[0021] (2) The nickel button electrolytic growth additive was dissolved in the electrolyte, and the oxidation-reduction potential of the electrolyte was -75mv after the additive was added.

[0022] (3) After installing the cathode and anode in the electrolytic cell, turn on the power and the current density is 250A / m 2 Under the condition of electrolysis for 48h.

[0023] (4) After the electrolytic growth of the nickel button is completed, take out the nickel button and wash the electrolyte on the surface with water, then soak in hot water at 90°C for 10 minutes, take out the nickel button and quickly dry the surface moisture to obtain a matte surface nickel button. The analysis results of imp...

Embodiment 2

[0027] (1) Add the inorganic reducing agent sodium sulfite to the nickel button electrolyte, adjust the oxidation-reduction potential of the electrolyte to -60mv, and filter to remove the solid precipitate. A nickel button electrolyte with a reducing environment was prepared.

[0028] (2) The nickel button electrolytic growth additive is dissolved in the electrolyte, and the oxidation-reduction potential of the electrolyte is -60mv after the additive is added.

[0029] (3) After installing the cathode and anode in the electrolytic cell, turn on the power and the current density is 300A / m 2 Under the condition of electrolysis for 48h.

[0030] (4) After the electrolytic growth of the nickel button is completed, take out the nickel button and wash the electrolyte on the surface with water, then soak in hot water at 95°C for 5 minutes, take out the nickel button and quickly dry the surface moisture to obtain a matte surface nickel button. The analysis results of impurity compon...

Embodiment 3

[0034] (1) Add sodium hypochlorite, an inorganic oxidant, into the nickel button electrolyte, adjust the oxidation-reduction potential of the electrolyte to 300mv, and filter to remove solid precipitates. A nickel button electrolyte with an oxidizing environment was prepared.

[0035] (2) The nickel button electrolytic growth additive is dissolved in the electrolyte, and the oxidation-reduction potential of the electrolyte is 300mv after the additive is added.

[0036] (3) After installing the cathode and anode in the electrolytic cell, turn on the power and the current density is 200A / m 2 Under the condition of electrolysis for 24h.

[0037] (4) After the electrolytic growth of the nickel button is completed, take out the nickel button and wash the electrolyte on the surface with water, then soak in 80°C hot water for 5 minutes, take out the nickel button and quickly dry the surface moisture to obtain a bright surface nickel button. The analysis results of impurity componen...

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PUM

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Abstract

The invention provides a method for regulating and controlling brightness of nickel button appearance. The method comprises the following steps that an inorganic oxidizing agent is added into a nickel button electrolyte, and when the redox potential of the electrolyte is controlled to be 200 mv to 680 mv, the surface of the prepared nickel button is metal bright; and an inorganic reducing agent is added into the nickel button electrolyte, and when the redox potential of the electrolyte is regulated to be smaller than -50 mv, the surface of the prepared nickel button is matte. According to the method, the prepared matte nickel button is fine and smooth in texture, the redox potential of the electrolyte is changed through the added reducing agent and oxidizing agent, and stress control of nickel button growth, the use frequency of a nickel button polar plate and nickel button stripping are not affected.

Description

technical field [0001] The invention belongs to the technical field of nickel electrolysis, and in particular relates to a method for regulating the brightness of the appearance of a nickel button. Background technique [0002] Nickel button is a high value-added extension product of electrolytic nickel, with high technological content, and is widely used in national defense technology and fine electroplating industry abroad. Nickel button is an indispensable raw material in the precision electroplating industry. Compared with electrolytic nickel block, it has the advantages of good activity, fast dissolution, low residual electrode rate, and less bridging phenomenon. The physical appearance of the nickel button can be changed by the use of organic brighteners. Reducing the use of brighteners can reduce the surface gloss of the material, and it also destroys the balance of the original additives in controlling the stress of the nickel button. The discovery and use of inorga...

Claims

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Application Information

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IPC IPC(8): C25C1/08C25C7/06
CPCC25C1/08C25C7/06Y02P10/20
Inventor 郭勇李亦婧卢晓锋王旭生王磊王立成
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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