What is metal finishing? Mention technological importance of metal finishing.

4.A] What is meant by metal finishing? Mention (any five) technological importance of metal finishing.

Answer:-

It is a process in which a specimen metal (article) is coated with another metal or a polymer to modify the surface properties of the specimen.

Technological importance of metal finishing:-

1. To get a decorative surface. Example: Gold plating on copper.
2. To prevent corrosion. Example: Zinc coating on iron.
3. To modify the surface properties such as thermal resistance, hardness, brightness, brittleness, etc. Example: Chromium or nickel coating on iron.
4. To get thermal and electrical conductivity.
5. Manufacture of Electronic components. Example PCB Circuits.