How do corrosion inhibitors and protective coatings contribute to bridge longevity, and what maintenance concerns can compromise them?

• A. They accelerate corrosion if misapplied.
• B. They have no effect on longevity.
• C. They slow corrosion and extend service life; concerns include coating damage, abrasion, thermal cycling, and inadequate reapplication timing.
• D. They are only for appearance and have no structural impact.

Answer: (C)