AMPP Corrosion Technologist Practice Questions - AMPP Corrosion Technologist Certification Exam

Which of the following correctly describes the Pourbaix diagram for iron at 25°C?

A single corroding region over all pH Regions of immunity (below about -0.62 V SHE), passivity (intermediate pH with oxide), and corrosion (low pH or very high pH) Only a passive region Only a corroding region

Correct Answer:

Regions of immunity (below about -0.62 V SHE), passivity (intermediate pH with oxide), and corrosion (low pH or very high pH)

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