NACE CP1 – Key Questions And Answers
2025\2026 A+ Grade
Corrosion
- accurate answers-The deterioration of a substance, usually a metal from a
reaction with its environment
Passivation
- accurate answers-A layer of oxides formed on the surface of a metal that
provides corrosion protection.
The elements of a corrosion cell
- accurate answers-Anode, cathode, metallic pathway, electrolyte
what happens at the anode
- accurate answers-The metal dissolves into the electrolyte
The function of the metallic pathway
- accurate answers-Allows the flow of electrons to connect the corrosion cell
Galvanic series
- accurate answers-A listing in order of reactivity ( more or less noble) in
seawater 25c
The general rules of galvanic corrosion
- accurate answers-The less noble (more reactive) metal when connected to a
more noble (or less reactive metal) will corrode preferentially.
the five most important factors that affect the rate of corrosion.
- accurate answers-Humidity, oxygen, chemical salts, pollutants, temperature
General corrosion
- accurate answers-Results in a relatively uniform loss of material over the
entire surface. Results in a general thinning of the affected surface. Relatively
easy to inspect. Does not cause catastrophic failures.
Localized corrosion
- accurate answers-Typically pitting and crevice corrosion. It is typically of the
2025\2026 A+ Grade
Corrosion
- accurate answers-The deterioration of a substance, usually a metal from a
reaction with its environment
Passivation
- accurate answers-A layer of oxides formed on the surface of a metal that
provides corrosion protection.
The elements of a corrosion cell
- accurate answers-Anode, cathode, metallic pathway, electrolyte
what happens at the anode
- accurate answers-The metal dissolves into the electrolyte
The function of the metallic pathway
- accurate answers-Allows the flow of electrons to connect the corrosion cell
Galvanic series
- accurate answers-A listing in order of reactivity ( more or less noble) in
seawater 25c
The general rules of galvanic corrosion
- accurate answers-The less noble (more reactive) metal when connected to a
more noble (or less reactive metal) will corrode preferentially.
the five most important factors that affect the rate of corrosion.
- accurate answers-Humidity, oxygen, chemical salts, pollutants, temperature
General corrosion
- accurate answers-Results in a relatively uniform loss of material over the
entire surface. Results in a general thinning of the affected surface. Relatively
easy to inspect. Does not cause catastrophic failures.
Localized corrosion
- accurate answers-Typically pitting and crevice corrosion. It is typically of the
