Tin Anodes

Tin Metal Anode

Chemical symbol: Sn

Purity: the rolled (or laminated) tin anodes have a purity between 99.85% and 99.9%. We also offer 100 ppm and 50 ppm “lead-free” tin.

Dimensions: cross-section 100 x 10 mm, 200 x 10 mm, 100x1200x10 mm

Galvanization with tin anodes involves immersing the tin anode and the metal part in an electrolyte solution. Then, an electric current passes through the liquid. The tin is connected to the positively charged anode electrode, and the metal part to the negatively charged cathode electrode.
The tin is attracted to the cathode by direct current and dissolves in the electrolyte solution. The tin anode can be used in various galvanization processes.
For delicate parts, the vibration coating is a costlier method to coat metal components, where the parts are placed in baskets containing metal balls filled with electrolytes, and the basket is vibrated.
The barrel coating is applied to smaller parts by rotating a barrel containing the electrolyte. This is the most cost-effective coating method.
The rack coating is used for large metal parts, where the metal is hung on a rack and immersed in the electrolyte. This process is more expensive than barrel coating but cheaper than vibration coating.
Applications of tin metal anodes include: Reduced friction: Tin is alloyed with lead and copper and used to coat motor bearings. This tin coating allows easy sliding in the direction of movement with reduced friction. Bearing wear and damage can cause severe and sudden failures without a tin anode. Corrosion resistance: In outdoor applications with high environmental stress, tin plating acts as a sacrificial anode to protect metals from corrosion. The corrosive environment corrodes the tin first, not the metal. Improved electrical and thermal conductivity: To increase electrical or thermal conductivity, e.g., for electronic components and semiconductors, parts are tin-plated.
Surface protection:
In the food industry, metals are made non-toxic; therefore, tin anodes are galvanically applied on machine parts as protective coatings to prevent contamination. To improve thickness and uniformity: depending on the application, a metal part’s surface may be uneven or too thin. Tin galvanization makes the thickness uniform without affecting the properties of the metal parts. Metal finish: In some applications, the tin anode is plated to improve appearance. Tin provides a soft and ductile surface to the part.
Tin metal
Conclusion:
The benefits of tin galvanization are found in many applications on different metal parts. Special attention should be paid to the type of electrolyte, the thickness of the tin layers, and the application requirements. Additionally, manufacturers must decide whether to alloy the tin with other metals, such as lead, bismuth, silver, copper, zinc, or lead/copper, during the galvanic separation process.
Product description: our rolled tin anodes are made from primary tin, i.e., “not recycled” material. Cold lamination changes the mechanical properties and metallurgical structure of the tin, including grain orientation extension and modification. These properties are sometimes necessary for technical surface treatments.

Application: rolled tin anodes are used in methanesulfonic acid, sulfate, and tetrafluoroborate baths. They are also suitable for alkaline baths containing potassium stannate and sodium stannate. Their main applications are in electrical, electronic, connector, automotive, and food industry tin plating. For filtration, it is recommended to use a polypropylene bag placed directly on the tin anode.

Packaging: on pallets