Technician I Corrosion Training Practice Test

Corrosion inhibitors in open cooling towers are used to manage the water chemistry and protect the metal surfaces from corrosion, while also helping control biological growth. They form protective films on metals, which slows down the electrochemical reactions that cause corrosion (a passivation effect). They also scavenge or neutralize reactive species in the water, such as oxygen or other oxidants, which further reduces corrosion potential. By maintaining appropriate chemistry and surface protection, they help keep equipment from corroding and also help limit biofouling.

The other ideas miss the main purpose: sterilizing water completely isn’t what inhibitors do, they don’t increase mineral content, and they don’t color the water.