NACE CP2 EXAM VERSION 1 AND 2 NEWEST 2026 ACTUAL
EXAM COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS WITH EXPLANATIONS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Corrosion is an electrochemical process involving:
A. Flow of protons and electrons
B. Flow of neutrons and ions
C. Flow of protons and ions
D. Flow of electrons and ions
E. Flow of resistance and resistivity
Correct Answer: D. Flow of electrons and ions
Rationale: Corrosion is an electrochemical oxidation-reduction process. Electrons are
transferred through the metallic portion of the corrosion cell, while ions move through the
electrolyte. This movement of electrons and ions enables the electrochemical reactions that
cause metal deterioration.
Question 2
Metal loss or corrosion occurs at the:
A. Cathode
B. Anode
C. Electronic path
D. Metallic path
Correct Answer: B. Anode
Rationale: Oxidation occurs at the anode, where metal atoms lose electrons and enter the
electrolyte as ions. Because metal is consumed at this location, the anode is the site where
corrosion or metal loss occurs. The cathode, in contrast, is where the reduction reaction
occurs.
Question 3
What are the four parts of a corrosion cell?
A. Anode, cathode, electrolyte, and metallic/electronic path
B. Anode, resistor, battery, and electrolyte
,C. Cathode, proton, neutron, and electron
D. Metal, oxygen, water, and heat
Correct Answer: A. Anode, cathode, electrolyte, and metallic/electronic path
Rationale: A functioning corrosion cell requires four essential components: an anode, where
oxidation and metal loss occur; a cathode, where reduction occurs; an electrolyte, which
permits ionic movement; and a metallic/electronic path, which allows electrons to flow
between the anode and cathode. Removing any one of these components can interrupt the
corrosion process.
2
anode, resistor, electrolyte, metallic path
,3
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path -
(answers)c
True or False (t or f):
Ions exist only in the electrolyte? - (answers)t
Electrons flow in a corrosion cell by which of the
following paths?
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
, C) anode to cathode via electronic path - (answers)c
At the cathodic surface in a corrosion cell, the electronsmeet
from the ions from the solution.
A) cathode, hydrogen
B) cathode, OH-
C) anode, hydrogen
D) anode, OH- - (answers)c
Oxidation of the metal occurs at the
4
surfaces and reduction of ions occurs at the .
EXAM COMPLETE QUESTIONS AND CORRECT DETAILED
ANSWERS WITH EXPLANATIONS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Corrosion is an electrochemical process involving:
A. Flow of protons and electrons
B. Flow of neutrons and ions
C. Flow of protons and ions
D. Flow of electrons and ions
E. Flow of resistance and resistivity
Correct Answer: D. Flow of electrons and ions
Rationale: Corrosion is an electrochemical oxidation-reduction process. Electrons are
transferred through the metallic portion of the corrosion cell, while ions move through the
electrolyte. This movement of electrons and ions enables the electrochemical reactions that
cause metal deterioration.
Question 2
Metal loss or corrosion occurs at the:
A. Cathode
B. Anode
C. Electronic path
D. Metallic path
Correct Answer: B. Anode
Rationale: Oxidation occurs at the anode, where metal atoms lose electrons and enter the
electrolyte as ions. Because metal is consumed at this location, the anode is the site where
corrosion or metal loss occurs. The cathode, in contrast, is where the reduction reaction
occurs.
Question 3
What are the four parts of a corrosion cell?
A. Anode, cathode, electrolyte, and metallic/electronic path
B. Anode, resistor, battery, and electrolyte
,C. Cathode, proton, neutron, and electron
D. Metal, oxygen, water, and heat
Correct Answer: A. Anode, cathode, electrolyte, and metallic/electronic path
Rationale: A functioning corrosion cell requires four essential components: an anode, where
oxidation and metal loss occur; a cathode, where reduction occurs; an electrolyte, which
permits ionic movement; and a metallic/electronic path, which allows electrons to flow
between the anode and cathode. Removing any one of these components can interrupt the
corrosion process.
2
anode, resistor, electrolyte, metallic path
,3
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path -
(answers)c
True or False (t or f):
Ions exist only in the electrolyte? - (answers)t
Electrons flow in a corrosion cell by which of the
following paths?
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
, C) anode to cathode via electronic path - (answers)c
At the cathodic surface in a corrosion cell, the electronsmeet
from the ions from the solution.
A) cathode, hydrogen
B) cathode, OH-
C) anode, hydrogen
D) anode, OH- - (answers)c
Oxidation of the metal occurs at the
4
surfaces and reduction of ions occurs at the .
