NACE CIP 1 Exam Review
Corrosion
Correct Answer:
The deterioration of a substance, usually a metal from a reaction with its environment
Passivation
Correct Answer:
A layer of oxides formed on the surface of a metal that provides corrosion protection.
The elements of a corrosion cell
Correct Answer:
Anode, cathode, metallic pathway, electrolyte
What happens at the anode?
Correct Answer:
The metal dissolves into the electrolyte
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The function of the metallic pathway
Correct Answer:
Allows the flow of electrons to connect the corrosion cell
galvanic series
Correct Answer:
A listing in order of reactivity (more or less noble) in seawater 25c
The general rules of galvanic corrosion
Correct 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.
Correct Answer:
Humidity, oxygen, chemical salts, pollutants, temperature
General corrosion
Correct 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.
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