1. NACE 2008 Student Manual!
b b b b
START OF CHAPTER 1
b b b
Corrosion is an electrochemical process involving
b b b b b
A) flow of protons and electrons
b b b b
B) flow of neutrons and ions
b b b b
C) flow of protons and ions
b b b b
D) flow of electrons and ions
b b b b
E) flow of resistance and resistivity: d
b b b b b
2. Metal loss or corrosion occurs at the
b b b b b b
A) cathode
B) anode
C) electronic path b
D) metallic path: b b b
3. What are the four parts of the corrosion cell
b b b b b b b b
A) anode, resistor, electrolyte, metallic path
b b b b
B) anode, cathode, electron, electronic path
b b b b
C) anode, cathode, electrolyte, metallic path: c
b b b b b
4. True or False (t or f)
b b b b b
1b/b100
,Ions exist only in the electrolyte?: t
b b b b b b
5. Electrons flow in a corrosion cell by which of the following paths?
b b b b b b b b b b b
A) anode to cathode via electrolyte
b b b b
B) cathode to anode via electronic path
b b b b b
C) anode to cathode via electronic path: c
b b b b b b
6. At the cathodic surface in a corrosion cell, the electrons from the
b b b b b b b b b b b bb
b meet ions from the solution. b b b
A) cathode, hydrogen b
B) cathode, OH- b
C) anode, hydrogen b
D) anode, OH-: c b b
7. Oxidation of the metal occurs at the
b b b b b b bb
surfaces and reduction of
b b b ions occurs at the
b b b .
2b/b100
,A) anodic, hydrogen, cathodes b b
B) cathode, OH-, anodic b b
C) anodic, OH-, cathodes b b
D) cathode, anodic, electrolyte b b
E) cathode, hydrogen, electrolyte: a b b b
8. True or false b b
Is oxidation necessarily associated with oxygen?: f
b b b b b b
9. Current flow in a corrosion cell flows which path:
b b b b b b b b
A) anode to metallic path to cathode
b b b b b
B) anode to electronic path to cathode
b b b b b
C) cathode to metallic to anode b b b b
D) cathode to electrolyte to anode b b b b
E) anode to electrolyte to cathode
b b b b
Voltage is the measure of the electrochemical difference between two elec-
b b b b b b b b b b
trodes
b
in an electrolyte: e
b b b
10. b
is the measure of the electrochemical difference between twoelectro
b b b b b b b b b
des
in an electrolyte
b b
3b/b100
, A) current
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage: f b
11. The bb
represents the reversible work to move a unit charge from the electrodes
b b b b b b b b b b b b
urface
through the solution to the reference electrode
b b b b b b
A) current potential
b
B) electrode potential b
4b/b100