CHP21

Cathodic Protection can supplement a coating system, especially as the coatings deteriorate?

• Not true

• True

• Only in soil

• Only in water

Corrosion is what kind of process?

• Magnetic

• Slow

• Electronic

• Electrochemical

For corrosion to occur it is necessary to have the simultaneous presence of oxygen and _________?

• Water

• Dirt

• Oil

• Gas

The Electrolyte can generally be water or ________?

• Brick

• Soil

• Gas

• Steam

No corrosion occurs at the ________ area?

• Anodic

• Hot

• Cold

• Cathodic

The two types of cathodic protection are sacrificial and ________ current?

• Independent

• Positive

• Impressed

• High

If no electrons are generated by the anodic reaction, the entire metal surface will exhibit the _________ reaction?

• Impressed

• Galvanic

• Cathodic

• Corrosion

Galvanic anodes are ________ voltage?

• Low

• High

• Electronic

• Stable

Power is supplied by an external DC power unit, what kind of cathodic protection system?

• Sacrificial

• Power

• Impressed current

• Low voltage

Galvanic anodes can be specially designed to suit the shape of the structure?

• True

• Only true for pipelines

• Only true for sub-sea structures

• Not true