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Method for increasing deposition rate of electroplated layer by applying magnetic field

A technology of external magnetic field and deposition rate, applied in the field of electroplating, can solve problems such as burning, destroying tin-zinc alloy plating characteristics, rough deposition of electroplating, etc.

Inactive Publication Date: 2014-05-21
WUXI SANZHOU COLD ROLLED SILICON STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the conventional methods using these electroplating baths, when processing at a high current density in order to shorten the processing time, rough deposition, yellowing, burning, etc. of the plating occur, and the characteristics of the tin-zinc alloy plating are destroyed. Therefore, Practical application of high-speed electroplating is difficult

Method used

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  • Method for increasing deposition rate of electroplated layer by applying magnetic field
  • Method for increasing deposition rate of electroplated layer by applying magnetic field
  • Method for increasing deposition rate of electroplated layer by applying magnetic field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] After the pretreatment of the steel sheet, electroplating was performed using the following plating bath under the conditions of a plating bath temperature of 60° C., a steady-state magnetic field of 1.2 T, and a stirring speed of the plating solution of 50 m / min.

[0028]

[0029] The methyl ester was reacted at 85°C for 60 minutes to obtain

[0030] product, so that 1 part of the product and

[0031] 0.5 parts of phthalic anhydride reacted at 95°C

[0032] The product should be obtained in 90 minutes

[0033] pH4 (adjusted with ammonia water)

Embodiment 2

[0035] After the steel plate was pretreated, 5 g / L of Nymin NAG-1001 manufactured by NOF Co., Ltd. was added as a nonionic surfactant in the plating bath of Example 1, and the temperature of the plating bath was 60° C., and 1.3 T was applied. The electroplating treatment was carried out under the conditions of a steady magnetic field and a stirring speed of the plating solution of 30 m / min.

Embodiment 3

[0037] After the pretreatment of the steel sheet, electroplating was performed using the following plating bath under the conditions of a plating bath temperature of 60° C., a steady-state magnetic field of 1.4 T, and a stirring speed of the plating solution of 30 m / min.

[0038]

[0039] Chlorine is produced by reacting at 85°C for 180 minutes

[0040] product

[0041] 1 mole of diethylenetriamine and 1 mole of 2-chloroethane 1g / L

[0042] Alcohol reacted at 100°C for 90 minutes

[0043] product

[0044] pH14

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PUM

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Abstract

The invention relates to a method for increasing the deposition rate of an electroplated layer by applying a magnetic field. An electroplated object is pretreated through at least one operation of dipping and degreasing, acid pickling, electrolytic washing and activation, and then subjected to an electroplating process, wherein a 1.2-1.5T stable magnetic field is applied during the electroplating process. By applying the magnetic field and using a specific alloy electroplating bath, the electroplating of tin-zinc alloy within a short time becomes possible.

Description

technical field [0001] The invention relates to an electroplating method, in particular to a method for increasing the deposition rate of an electroplating layer by applying an external magnetic field. Background technique [0002] Tin-zinc alloy plating is excellent in corrosion resistance, workability, and solderability, so it is attracting attention and widely used as industrial plating for automotive parts and electronic parts. Alkaline cyanide baths, pyrophosphoric acid baths, fluoboric acid baths, sulfonic acid baths, carboxylic acid baths, and the like have been proposed as plating baths used in the tin-zinc alloy plating, and some of them have been put into practical use. [0003] In the conventional methods using these electroplating baths, when processing at a high current density in order to shorten the processing time, rough deposition, yellowing, burning, etc. of the plating occur, and the characteristics of the tin-zinc alloy plating are destroyed. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/00C25D3/60C25D3/56
Inventor 刘茂见
Owner WUXI SANZHOU COLD ROLLED SILICON STEEL