很遗憾,因您的浏览器版本过低导致无法获得最佳浏览体验,推荐下载安装谷歌浏览器!

What is electroplating?

2020-01-15  From: Xiamen Yijing Technology CO.,LTD Browsing times:399

Electroplating refers to a surface processing method in which a salt of a pre-plated metal is used as a cathode, and the cations of the pre-plated metal are deposited on the surface of the base metal by electrolysis to form a coating. 

Fundamental

Electroplating is an electrochemical process and a redox process. The basic process of electroplating is to immerse a part in a solution of a metal salt as the cathode and a metal plate as the anode. After connecting the DC power supply, the required Plating.

For example: when nickel plating, the cathode is the part to be plated, and the anode is a pure nickel plate. The following reactions occur at the cathode and anode respectively:

Cathode (plating): Ni2 ++ 2e → Ni (main reaction)

2H ++ 2e → H2 ↑ (Side reaction)

Anode (nickel plate): Ni -2e → Ni2 + (main reaction)

4OH--4e → 2H2O + O2 (side reaction)

Not all metal ions can be deposited from an aqueous solution. If the side reaction of reduction of hydrogen ions to hydrogen on the cathode is dominant, metal ions are difficult to precipitate on the cathode. According to experiments, the possibility of metal ions being electrodeposited from aqueous solutions , Can be obtained from the periodic table of elements.

The anodes are divided into soluble anodes and insoluble anodes. Most anodes are soluble anodes corresponding to the plating layer, such as: zinc anodes for zinc plating, silver anodes for silver plating, and tin-lead alloys for tin-lead alloy anodes. Due to the difficulty of dissolving the anode, insoluble anodes are used. For acid gold plating, platinum or titanium anodes are mostly used. The main salt ions of the plating solution are supplemented by adding a prepared standard gold-containing solution. The chromium-plated anodes use pure lead, lead-tin alloy, Insoluble anodes such as lead-antimony alloys.

Keywords: electroplating           

Contact

  • Contacter:

    郑福南

    Hotline:

    15359026585

  • Email:

    1612614469@qq.com

  • Address:

    101 Cen Xi road, Jimei district, Xiamen, Fujian Province, China

Xiamen Yijing Technology CO.,LTD,Monopoly Rope saw Electroplated saw blade Sandpaper Electroplated grinding plate Sand Belt Hand Rub And other business,Interested customers please contact us,Phone:15359026585

CopyRight © All Rights Reserved: Xiamen Yijing Technology CO.,LTD Site Map XML


Follow us