Problem 7.1: Name the four components of a corrosion cell

From Chapter 7 Problem Set. Level 1: Conceptual Mastery.

Question

Name the four components of a corrosion cell. Which single component is most difficult to remove in an open cooling system, and why?

Answer

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Anode (metal dissolves), cathode (electrons consumed by oxidizer), electrolyte (ionic conduction through water), metallic path (electron conduction through metal). In an open cooling tower, the cathodic reactant (oxygen) is most difficult to remove because it is continuously replenished from the atmosphere.