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Method for reducing coating hydrogen embrittlement degree

A level, coating technology, applied in the field of electroplating, can solve problems such as hydrogen embrittlement, achieve the effects of improving production efficiency, preventing hydrogen embrittlement, and increasing speed

Inactive Publication Date: 2005-06-29
徐菁
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

In order to prevent hydrogen ions from being reduced, the current practice is to strictly control the tank voltage to be lower than the reduction potential of hydrogen. A small amount of hydrogen is reduced, resulting in hydrogen embrittlement

Method used

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  • Method for reducing coating hydrogen embrittlement degree

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Embodiment Construction

[0008] As shown in the figure, an ultrasonic generator 3 is arranged at the cathode end of the electroplating tank 1, that is, the end where the plated piece is located, and emits ultrasonic waves to the plated piece during the electroplating process. The ultrasonic frequency used in the embodiment is 45KHz, and the power intensity per square meter It is 300W.

[0009] During electroplating, the ultrasonic generator works, and the ultrasonic wave begins to bombard the surface of the plated piece. At this time, the plating solution also begins to roll along with the vibration. Due to the cavitation effect generated by the ultrasonic wave, the small molecule hydrogen generated on the surface of the bombarded plated piece is detached, and the plated piece The small molecular hydrogen on the surface is eliminated, which increases the density of the coating and enhances the bonding force. The overall reflection is that the brightness of the coating is improved, the shear strength is...

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Abstract

A method for reducing the degree of hydrogen embrittlement of the coating is to install an ultrasonic generator at the cathode end of the electroplating tank, and emit ultrasonic waves to the plated parts during the electroplating process. Utilize the cavitation effect generated by ultrasonic waves to bombard the small molecular hydrogen generated on the surface of the plated piece to make it detach, reduce the small molecular hydrogen on the surface of the plated piece, facilitate the deposition of metal atoms in the coating, produce a dense coating, and prevent hydrogen embrittlement. At the same time, it is beneficial to increase the speed of coating formation and improve production efficiency.

Description

technical field [0001] This invention relates to electroplating, and in particular to methods of increasing the strength of coatings. Background technique [0002] In the electroplating process, the plated piece is the cathode, and the hydrogen ions in the plating solution gather around the plated piece. If the potential is higher than its reduction potential, the hydrogen ions get electrons and are reduced to hydrogen molecules. At the beginning, the molecules are attached to the surface of the plated piece. When condensed As the number increases, it becomes the release of bubbles and detaches from the surface of the plated parts. Due to the accumulation of a large number of small hydrogen molecules on the surface of the plated part, it affects the adhesion of the plated metal and makes it loose. The overall reflection is that the plated layer is brittle, that is, the phenomenon of hydrogen embrittlement of the plated layer. In order to prevent hydrogen ions from being red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/20
Inventor 徐菁
Owner 徐菁
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