NACE CP1 – Questions & Answers 100%
Correct
corrosion - ANSWER-The deterioration of a substance, usually a metal from a reaction
with its environment
Passivation - ANSWER-A layer of oxides formed on the surface of a metal that provides
corrosion protection.
the elements of a corrosion cell - ANSWER-Anode, cathode, metallic pathway,
electrolyte
what happens at the anode - ANSWER-The metal dissolves into the electrolyte
the function of the metallic pathway - ANSWER-Allows the flow of electrons to connect
the corrosion cell
galvanic series - ANSWER-A listing in order of reactivity ( more or less noble) in
seawater 25c
The general rules of galvanic corrosion - ANSWER-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. - ANSWER-Humidity,
oxygen, chemical salts, pollutants, temperature
General corrosion - ANSWER-Results in a relatively uniform loss of material over the
entire surface. Results in a general thinning of the affected surface. Realively easy to
inspect. Does not cause catastrophic failures.
Localized corrosion - ANSWER-Typically pitting and crevice corrosion. It is typically of
the most concern as damage is concentrated and loss of integrity or structure failure
can result.
Common tool/ methods used for corrosion control. - ANSWER-Design, inhibitors,
material selection, cathodic protection, protective coatings, splash zone systems,
alteration of the environment
Anode - ANSWER-The electrode of an electrochemical cell at which oxidation occurs.
Electrons flow away from the anode in the external circuit. Corrosion usually occurs and
metal ions enter the solution at the anode.
Correct
corrosion - ANSWER-The deterioration of a substance, usually a metal from a reaction
with its environment
Passivation - ANSWER-A layer of oxides formed on the surface of a metal that provides
corrosion protection.
the elements of a corrosion cell - ANSWER-Anode, cathode, metallic pathway,
electrolyte
what happens at the anode - ANSWER-The metal dissolves into the electrolyte
the function of the metallic pathway - ANSWER-Allows the flow of electrons to connect
the corrosion cell
galvanic series - ANSWER-A listing in order of reactivity ( more or less noble) in
seawater 25c
The general rules of galvanic corrosion - ANSWER-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. - ANSWER-Humidity,
oxygen, chemical salts, pollutants, temperature
General corrosion - ANSWER-Results in a relatively uniform loss of material over the
entire surface. Results in a general thinning of the affected surface. Realively easy to
inspect. Does not cause catastrophic failures.
Localized corrosion - ANSWER-Typically pitting and crevice corrosion. It is typically of
the most concern as damage is concentrated and loss of integrity or structure failure
can result.
Common tool/ methods used for corrosion control. - ANSWER-Design, inhibitors,
material selection, cathodic protection, protective coatings, splash zone systems,
alteration of the environment
Anode - ANSWER-The electrode of an electrochemical cell at which oxidation occurs.
Electrons flow away from the anode in the external circuit. Corrosion usually occurs and
metal ions enter the solution at the anode.
