QUESTIONS AND ANSWERS
1. NACE 2008 Student
Manual! START OF
CHAPTER 1
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
ANS d
2. Metal loss or corrosion occurs at the
A) cathode
B) anode
C) electronic path
D) metallic path
ANS b
,3. What are the four parts of the corrosion cell
A) anode, resistor, electrolyte, metallic path
B) anode, cathode, electron, electronic path
C) anode, cathode, electrolyte, metallic path
ANS c
4. True or False (t or f)
Ions exist only in the electrolyte?
ANS t
5. 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
ANS c
6. At the
cathodic surface in a corrosion cell, the electrons from the meet
ions from the solution.
,A) cathode, hydrogen
B) cathode, OH-
C) anode, hydrogen
D) anode, OH-
ANS c
7. Oxidation of the metal occurs at
the
surfaces and reduction of ions occurs at the .
A) anodic, hydrogen, cathodes
B) cathode, OH-, anodic
C) anodic, OH-, cathodes
D) cathode, anodic, electrolyte
E)cathode, hydrogen, electrolyte
ANS a
8. True or false
Is oxidation necessarily associated with oxygen?
ANS f
9. Current flow in a corrosion cell flows which path
, A) anode to metallic path to cathode
B) anode to electronic path to cathode
C) cathode to metallic to anode
D) cathode to electrolyte to anode
E)anode to electrolyte to cathode
Voltage is the measure of the electrochemical difference between two
electrodes
in an electrolyte
ANS e
10. is the measure of the electrochemical difference
between two
electrodes
in an electrolyte
A) current
B) resistance
C) error
D) ohms
E)ohms-cm