What is one primary reason for using epoxy-coated reinforcing bars?

• A. To increase tensile strength beyond carbon steel
• B. To reduce cost of reinforcement
• C. To resist corrosion in aggressive or chloride-rich environments
• D. To improve bonding with concrete significantly

Answer: (C)

Epoxy-coated reinforcing bars are used mainly to protect the steel from corrosion in harsh or chloride-rich environments. The epoxy coating acts as a barrier, keeping moisture, oxygen, and chlorides away from the steel surface so rusting is slowed or prevented. This extends the life of reinforced concrete in places like coastal areas or where de-icing salts are common. The coating doesn’t increase the steel’s tensile strength, nor is it intended to cut costs; it also isn’t primarily about improving bonding with concrete (and bonding can be affected if the coating is damaged).