Sherardising process involve

Explanation:

Prevention of corrosion:

Commonly used metallic corrosion-resisting coatings:

• Hot dipping (galvanizing)
• Electroplating
• Cladding
• Metal spraying
• Cementation

Cementation:

There are three types of cementation processes for protecting metal surfaces:

1. Sherardising (Zinc coating)
2. Calorising (Aluminum coating)
3. Chromizing (Chromium coating)

Sherardizing

• This process is used for galvanizing those small parts having intricate shapes
• In this process, there is a box or container filled with fine zinc powder
• The parts are placed in this box, surrounded by the powder; The box is then heated in an oxygen
• Zinc powder vaporizes; Zinc vapor comes in contact with the surface of the workpiece and zinc is deposited on the workpiece
• The workpiece is then taken out and it is allowed to cool down to room temperature; In this way galvanizing of the workpiece can be completed.