4.5. Detection and Prevention

Try these first

1. 1.

   What is the purpose of corrosion inhibitors?

   Hint

   Think about how they protect steel in concrete.

2. 2.

   Name one method for detecting corrosion in concrete.

   Hint

   Consider methods that measure electric potentials.

3. 3.

   What does the half-cell potential test measure?

   • Concrete strength
   • Corrosion potential
   • Water permeability

   Hint

   It involves measuring electrical potentials.

4. 4.

   True or False: Low permeability concrete is beneficial because it allows more harmful substances to enter.

   • True
   • False

   Hint

   Think about permeability as a barrier.

5. 5.

   Evaluate the effectiveness of using epoxy-coated rebars in preventing corrosion compared to traditional rebars. Discuss factors that might influence this effectiveness.

   Hint

   Consider both protection and potential failures of coatings.

6. 6.

   Given that a building has shown signs of surface cracking due to corrosion, design a rehabilitation strategy that incorporates both detection and prevention techniques.

   Hint

   Think about the lifecycle of the building and how to extend it.