Material Addition

1
Material Addition

• Chapter 8

2
Electroplating

• Anode
• Electrical potential drives ions to cathode.
• Electrolyte
• Contains metal ions of the metal you want
  deposited on the cathode.
• Cathode
• Cathode collects ions from the electrolyte as the
  plating.

3
Brush Plating

• Electrode Brush
• Saturate with plating solution
• Electrode
• Charged work piece. (see page 151)

4
Electroforming

• Plating on a pattern
• Remove pattern by dissolving or breaking up.

5
Chemical Plating

• Low activity metal in solution
• High activity metal work piece
• Low activity metal plates to the High activity
  metal.

6
Dipping

• Dip part in molten metal to be plated.
• Molten metal solidifies to the part.

7
Hardfacing

• Deposit material on to part by melting material
  with a torch

8
Metallizing

• Fine spray of melted material is added to part.
• Processes
• Oxy-fuel flame spraying
• Electric arc spraying
• Plasma arc spraying
• Detonation Spraying

9
Vapor-Deposited Coatings

• Vacuum Coating
• Sputtering

10
Uses of Sprayed Metal Coating

• Corrosion Protection
• Apply thin hardface
• Rebuild worn material
• Apply expensive coating materials efficiently
• Change surface properties