9.3. Cathodic Protection Systems

Try these first

1. 1.

   What is the main purpose of cathodic protection?

   Hint

   Think about what happens to metals in water.

2. 2.

   Name one type of cathodic protection system.

   Hint

   One uses different metals to corrode instead.

3. 3.

   What is the function of sacrificial anodes?

   • To heal concrete
   • To corrode instead of protected metal
   • To enhance strength

   Hint

   Think about what a 'sacrificial' item does.

4. 4.

   Impressed current systems are generally more effective than sacrificial anodes.

   • True
   • False

   Hint

   Consider long-term protection versus short-term solutions.

5. 5.

   Given the scenario of a marine bridge experiencing corrosion, recommend a type of cathodic protection system and justify your choice.

   Hint

   Think about the challenges specific to marine environments.

6. 6.

   Analyze the effectiveness of sacrificial anodes over a five-year period. What factors would you consider?

   Hint

   Consider what happens to the anodes over time in relation to corrosion rates.