NACE (National Association of Corrosion Engineers) CP2 EXAM
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NACE 2008 Student Manual!
START OF CHAPTER 1
Corrosion is an electrochemical process
involving
d
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
Metal loss or corrosion occurs at the
A) cathode
b
B) anode
C) electronic path
D) metallic path
What are the four parts of the corrosion
cell
A) anode, resistor, electrolyte, metallic
path c
B) anode, cathode, electron, electronic
path
C) anode, cathode, electrolyte, metallic
path
True or False (t or f):
t
Ions exist only in the electrolyte?
Electrons flow in a corrosion cell by
which of the following paths?
c
A) anode to cathode via electrolyte
B) cathode to anode via electronic path
C) anode to cathode via electronic path
At the cathodic surface in a corrosion
cell, the electrons from the ____ meet
____ ions from the solution.
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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A) cathode, hydrogen
B) cathode, OH- c
C) anode, hydrogen
D) anode, OH-
Oxidation of the metal occurs at the ____
surfaces and reduction of ____ ions oc-
curs at the ____.
A) anodic, hydrogen, cathodes a
B) cathode, OH-, anodic
C) anodic, OH-, cathodes
D) cathode, anodic, electrolyte
E) cathode, hydrogen, electrolyte
True or false
f
Is oxidation necessarily associated with
oxygen?
_____ is the measure of the electro-
chemical difference between two elec-
trodes
in an electrolyte
A) current f
B) resistance
C) error
D) ohms
E) ohms-cm
F) voltage
The ________
represents the reversible work to move a
unit charge from the electrode surface
through the solution to the reference
electrode b
A) current potential
B) electrode potential
C) resistance potential
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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D) ohms potential
E) Faraday potential
Metals occur in nature in the form of
various chemical compounds referred to
as
___
a
A) ores
B) anodic metals
C) cathodic metals
D) carbohydrates
The amount of energy required by a met-
al during the refining
process determines the ___ or _______
of the metal.
b
A) current, active state
B) voltage, active state
C) active resistance, voltage
D) resistance, active state
E) current, active resistance
During the refining stage of metal the
____ the energy, the more ____
the metal and the more tendency it has
to corrode.
c
A) higher, inactive
B) lower, active
C) higher, active
D) lower, inactive
What is the most common iron ore?
A) hemophite
B) hematite b
C) magnesium
D) calcium
E) aluminum
, NACE (National Association of Corrosion Engineers) CP2 EXAM
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True or false
t
Iron is considered thermodynamically
unstable?
True or false
t
Gold is more noble than zinc?
Which of the following metals is most
active?
A) magnesium
a
B) copper
C) iron
D) nickel
E) platinum
Electromotive force (emf), is ____ in sign
and magnitude to the electrode potential
of the ___ less the electrode potential of
the ____.
d
A) unequal, cathode, anode
B) unequal, anode, cathode
C) equal, cathode, anode
D) equal, anode, cathode
The driving force for electrochemical cor-
rosion is ____
A) current
b
B) voltage
C) resistance
D) ohms
E) siemens-cm
In relation to a corrosion cell, ____ is the
net transfer of electric charge per unit
time a
A) current
