17.6 Corrosion
Rusting treated as galvanic oxidation of metal exposed to water and oxygen, plus protective coatings, galvanizing, and sacrificial anodes.
3 exercises
17.6 Exercise 2
Consider the following metals: Ag, Au, Mg, Ni, and Zn. Which of these metals could be used as a sacrificial anode in the cathodic protection of an underground steel storage tank? Steel is an alloy composed mostly of iron, so use −0.447 V as the standard reduction potential for steel.
17.6 Exercise 4
If a sample of iron and a sample of zinc come into contact, the zinc corrodes but the iron does not. If a sample of iron comes into contact with a sample of copper, the iron corrodes but the copper does not. Explain this phenomenon.
17.6 Exercise 6
Why would a sacrificial anode made of lithium metal be a bad choice
Adapted from General Chemistry © 2019 Rice University. Licensed under CC BY 4.0. Sources: Chemistry 2e, Chemistry: Atoms First 2e. Imported at revision 32c7196.