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23. Passivation Process: This process involves the removal of dirt, grease, or metal oxides from the surface of a material, which can be done chemically or electrochemically.
24. Polishing Process: This is a method of creating a smooth and reflective surface on a material by removing any imperfections or blemishes on its surface.
25. Anodizing Process: In this process, the material is electroplated to increase its corrosion resistance, while at the same time giving it an attractive finish.
26. Plating Process: This is an electrochemical process in which a thin layer of metal is deposited onto the surface of a material to form a protective layer.
27. Bluing Process: This process creates a thin black coating on a material for decorative purposes and to protect it from rust.
28. Heat Treatment Process: This method of surface treatment involves exposing the material to high temperatures in order to increase its strength and durability.
29. Galvanizing Process: This technique involves coating the surface of a material with a layer of zinc to increase its corrosion resistance.
30. Welding Process: This is a process used to join two pieces of metal together by melting them and then allowing them to cool and form a strong bond.
