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Do you know what are the classifications of electroplating?

               
Date:2022-08-23 15:29:47 Tuesday
Summary: Single Metal Plating Single-metal electroplating has a history of more than 170 years, and there are 33 metals on the periodic table that can be prepared by electrodeposition from aqueous solutions. Commonly used are more than 10 kinds of electro-ga......
Single Metal Plating
Single-metal electroplating has a history of more than 170 years, and there are 33 metals on the periodic table that can be prepared by electrodeposition from aqueous solutions. Commonly used are more than 10 kinds of electro-galvanized, nickel, chromium, copper, tin, iron, cobalt, cadmium, lead, gold, silver and so on. The plating layer formed by simultaneously depositing two or more elements on the cathode is an alloy plating layer. The alloy coating has the structure and properties that a single metal coating does not have, such as amorphous Ni-P alloy, each core Sn alloy that is not on the phase diagram, and has a special decorative appearance, particularly high corrosion resistance and excellent weldability. , Magnetic alloy coating, etc.

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Composite plating
Composite plating is a process in which solid particles are added to the plating solution and co-deposited with metals or alloys to form a metal-based surface composite material to meet special application requirements. According to the classification of the electrochemical properties between the coating and the base metal, the electroplating layer can be divided into two categories: anodic coating and cathodic coating. When the potential of the coating metal relative to the base metal is negative, the coating is an anode when forming a corrosion microbattery, so it is called an anodic coating, such as the galvanized layer on steel parts; and when the potential of the coating metal relative to the base metal is positive, When the corrosion microbattery is formed, the coating is the cathode, so it is called cathodic coating, such as the nickel-plated layer and the tin-plated layer on the steel parts.