AMPP Basic Corrosion Certification Practice Exam 2025 – Comprehensive Prep

Question: 1 / 645

Coating type corrosion inhibitors work by leaching out when?

The coating is heated

The coating contacts moisture

Coating type corrosion inhibitors leach out when the coating comes into contact with moisture. This is primarily because moisture can facilitate the dissolution of the inhibitor within the coating matrix. When water penetrates the coating, it disrupts the bonds holding the inhibitor in place, allowing it to migrate to the surface where it can actively protect the underlying substrate from corrosion.

This mechanism is vital in the corrosion protection strategy, as the leaching of inhibitors helps to maintain a continuous barrier against corrosive agents, extending the service life of the coated material. The ability of the inhibitor to release in the presence of moisture is crucial for its effectiveness, enabling it to actively engage with any corrosive elements that might otherwise initiate a corrosion process.

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The coating is scratched

The coating is applied

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