Electrical Discharge Machining

Hydrophilic surface is a surface that has the ability to repel water

• True

• False

Hydrophobic means .....

• Positive towards water

• Negative towards water

• Both

EDM typically works on every metal as long as it is electrically conductive.

• True

• False

In this work, the polarity of the electrode was set to be positive, and the workpiece to be negative.

• True

• True

What is the advantage of using EDM to produce hydrophobic surface?

• Low machining speed

• Low cost

• No additional surface treatment is needed

• Hydrophilic surfaces are obtained immediately aftermachining.