Chemical deplating liquid for nickel-plating layer of copper busbar and application method of chemical deplating liquid

A technology of deplating solution and nickel plating layer, which is applied in the field of rework and deplating formula, which can solve the problems of formula 2, such as high temperature, high production cost, difficult maintenance and control, etc., and achieve the effect of smooth surface, low cost and fast speed

Inactive Publication Date: 2012-12-26
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0014] (3) Recipe 2 requires high temperature, high production cost, and difficult to maintain and control

Method used

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  • Chemical deplating liquid for nickel-plating layer of copper busbar and application method of chemical deplating liquid
  • Chemical deplating liquid for nickel-plating layer of copper busbar and application method of chemical deplating liquid
  • Chemical deplating liquid for nickel-plating layer of copper busbar and application method of chemical deplating liquid

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Below in conjunction with specific embodiment the present invention is further explained and illustrated

[0041] 1.1 Experimental reagents

[0042] Table 1 Names and grades of experimental reagents

[0043]

[0044] 1.2 Experimental Analysis

[0045] In order to comprehensively consider the influence of various components on the effect of nickel removal, the above-mentioned several components were used to carry out orthogonal optimization experiments, and 4 tests were performed at each level. The orthogonal test design is shown in Table 2.

[0046] Table 2 Orthogonal test factor level table

[0047]

[0048] 1.3 Experimental Discussion

[0049] Table 3 Recipe optimization test orthogonal table L 16 (4 5 )

[0050]

[0051]

[0052] Note: A indicates the corrosion condition, AAAAA is serious, A is slight, descending in order.

[0053] 1.3.1 Analysis of substrate corrosion

[0054] First, analyze the influence of the nitric acid factor on the corrosio...

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Abstract

The invention belongs to rework deplating formula of nickel-plating layer products on copper, and discloses a chemical deplating liquid for a nickel-plating layer of a copper busbar. The deplating liquid comprises nitric acid, sodium chloride, alkylphenol polyoxyethylene ether and aqueous solution of urea, wherein each liter of the liquid comprises 600-900ml / L of nitric acid, 10-60g / L of sodium chloride, 0.5-3ml / L of alkylphenol polyoxyethylene ether and 10-40g / L of urea. The formula of the deplating liquid does not contain highly toxic chemical component, and is an environment-friendly formula harmless to human environment. By the formula, the original highly toxic chemical component containing cyanide is broken through, unqualified nickel-plating products on the surface of copper can be realized during deplating, and secondary plating of a copper substrate can be assisted better.

Description

technical field [0001] This formula involves the rework and deplating formula of all nickel-plated layer products on copper, specifically a chemical deplating solution for nickel-plated copper busbars and its application method, especially the chemical stripping of nickel-plated copper busbars for rail transit products liquid and its method of use. Background technique [0002] Nickel plating is widely used in copper busbars inside rail transit products because of its good thermal conductivity, hardness and wear resistance. For the unqualified coating, such as the removal of nickel layer, some traditional processes use cyanide method, which has better effect and is not easy to corrode the substrate. However, cyanide is highly toxic, and the residual liquid is not easy to handle, which is seriously harmful to human body and environmental pollution. In addition, the storage and distribution requirements of such highly toxic substances are relatively strict, and the responsib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/28
Inventor 彭亚平毛波肖信开褚仁利李永红俞鹏程范志豪闫跃谢建良刘雄谭永强
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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