Surface Finishing Treatments (6)

Question 1

Pickling

Answer 1

An acid wash to prepare for Plating or Cladding.

- Removes foreign matter + promote hardening

Question 2

Etching

Answer 2

To prepare for further operations. Use of chemical acids, administered to remove thin surface layers for the application of coatings.

• Promotes Bonding
• Removes metal smearing after abrasive mechanical cleaning or machining

Question 3

Plating/Cladding

Answer 3

An electrolytic process that bonds a protective/decorative metal to the surface of either a metal or plastic material.
- Typical materials; chrome, nickel, silver

Question 4

Galvanizing

Answer 4

Applying a zinc coating

• Corrosion resistance, appearance
• Serves as a sacrificial anode

Question 5

Anodizing

Answer 5

Material is treated electrically in a suitable electrolyte to produce a corrosion resistant coating.