Cadmium plating is the process of metal finishing in which layer of cadmium is deposited on the metal workpiece to improve its exterior properties. Cadmium coating is deposited on the substrate using electric current, which is called electrodeposition. In this process, the substrate is dipped into the solution containing dissolved metal ions and electric current is passed through the solution to deposit the metallic coating over the substrate.
Cadmium plating is used for the finishing of the metal parts which are designed to use in harsh environments, such as low-pressure areas and salt-water environments. Hence, it is a preferred choice for the metal coating in the Aerospace Industry and Marine Industry. However, cadmium plating is not used for the metal coating of the domestic use metal products because of the highly toxic nature of the cadmium.
Due to highly toxic nature, its use is also prohibited in the food processing industry but other industries are utilizing its benefits for very long. Hence, it is the most popular choice for the electroplating of the metal.
Here are the key benefits of cadmium plating:
Cadmium metal coating functions as the sacrificial coating and corrodes before the substrate. It enhances the corrosion resistance of substrate and protects it from corroding. Due to high corrosion resistance in marine environments, it is a preferred choice of the surface coating for aquatic settings.
Cadmium coating is highly durable. It does not chip off easily. Due to its high durability, it is preferred for harsh weather conditions. Aircraft parts are electroplated with cadmium and made highly durable against tough environmental conditions.
Cadmium plating can significantly improve the lubricity and reduce the friction of metal parts. That’s why it is used for the metal finishing of bolts and moving machinery parts. Its natural lubricity and favorable galvanic coupling with aluminum make it the perfect choice for the surface coating of machinery parts. It reduces the wear and tear and improves the working of machinery parts.
Cadmium coating improves the adhesive properties of the substrate. It offers an exceptional bonding surface for the adhesives. Adhesives make a strong bond with the surface coated with a layer of cadmium. It also works really well as a paint base. Paint can retain its original appearance for a long duration. It also reduces the growth of molds and bacteria on the surface of metal therefore also works well as a final surface of the substrate.
Cadmium plating improves the electrical conductivity of the metal. It offers low electrical resistance to the current. Therefore, it can be used for the electroplating of metals, such as steel, aluminum, and iron.
If you are looking for the metal finishing of your metal products in tough environments, then no doubt cadmium plating is one of the best in the business.