CIP Level 2-Nace. Exam 2 Questions With 100%
Verified Correct Answers.
Anode
The negatively charged electrode of an electrochemical cell where oxidation occurs. Electrons
flow away from the Anode
Cathode
The positively charged electrode of an electrochemical cell where reduction is the principal
reaction. Electrons flow towards the cathode in the external circuit.
Cathodic Protection
A technique to reduce the corrosion of a metal surface by making that surface the cathode of an
electrochemical cell.
Corrosion
The deterioration of a material, usually a metal, that results from a reaction with its environment.
Crevice Corrosion
Localized corrosion of a metal surface at, or immediately adjacent to, an area that is shielded
from full exposure to the environment because of close proximity of the metal to the surface of
another material.
Electrolyte
A chemical substance containing ions that migrate in an electric field.
Galvanic Corrosion
The electrochemical action of two dissimilar metals in contact in the presence of an electrolyte,
and an electron conductive path.
Generalized Corrosion
Corrosion that is disturbed more or less uniformly over the surface of a material.
,Localized Corrosion
Corrosion that occurs at discrete sites on the metal surface.
Return Path (Metallic Pathway)
Path that connects the anode and cathode, allowing passage of electrons, generated at the anode,
to the cathode.
The principal component of mild carbon steel is ________.
A. Iron (Fe)
B. Carbon (C)
C. Chromium (Cr)
D. Silicon (Si)
A. Iron (Fe)
The formation of a thin surface layer on metals, whether an oxide, carbonate, or other
compound, that slows the rate of corrosion process is called?
A. Electro-osmosis
B. Electro-deposition
C. Faying surface
D. Passivation
D. Passivation
Which is the part of the corrosion cell where metal dissolves?
A. Anode
B. Cathode
C. Ionic pathway
D. Electrolyte
A. Anode
,Which of these elements is likely to accelerate corrosion on a steel structure? (Select all that
apply)
A. Salts
B. Low temperatures
C. High temperatures
D. Pollutants
A. Salts
C. High temperatures
D. Pollutants
In a cathodic protection system, the metal being protected is the _______?
A. Anode
B. Cathode
C. Ground bed
D. Rectifier
B. Cathode
When parts of a metal surface are shielded from full exposure to the environment because
of the close proximity of another metal, corrosion at that location is identified as _______?
A. Fretting corrosion
B. Cavitation-erosion corrosion
C. Pitting corrosion
D. Crevice corrosion
D. Crevice corrosion
Cathodic protection using impressed current is most commonly used on ______?
A. Off-shore drilling platforms
B. High voltage transmission towers
, C. Pipelines
D. Trucks
C. Pipelines
Impressed current ground bed anodes are likely to include ________? (Select all that
apply)
A. Graphite
B. Zinc
C. High silicon cast iron
D. Aluminum
A. Graphite
C. High silicon cast iron
ADsorbent Desiccants
Desiccants in their LIQUID form are called "ADsorbent desiccants". This includes common
sulfuric acid (used in chemical manufacturing), lithium chloride, or polymeric materials, such as
triethylene glycol.
ABsorbent Desiccants
Desiccants in their SOLD form are called "ABsorbent desiccants". Moisture is adsorbed onto the
surface of a granular material, such as silico gel, which is capable of holding large quantities of
moisture.
Boundry Layer
The layer of air immediately adjacent to the steel surface.
Desiccant(s)
Substances that naturally have a high affinity for water. They draw moisture directly from the
surrounding environment.
You are a coating inspector on a project with dehumidification provided by a rotating bed
type dehumidifier. The silica gel has become contaminated. What do you expect to happen
Verified Correct Answers.
Anode
The negatively charged electrode of an electrochemical cell where oxidation occurs. Electrons
flow away from the Anode
Cathode
The positively charged electrode of an electrochemical cell where reduction is the principal
reaction. Electrons flow towards the cathode in the external circuit.
Cathodic Protection
A technique to reduce the corrosion of a metal surface by making that surface the cathode of an
electrochemical cell.
Corrosion
The deterioration of a material, usually a metal, that results from a reaction with its environment.
Crevice Corrosion
Localized corrosion of a metal surface at, or immediately adjacent to, an area that is shielded
from full exposure to the environment because of close proximity of the metal to the surface of
another material.
Electrolyte
A chemical substance containing ions that migrate in an electric field.
Galvanic Corrosion
The electrochemical action of two dissimilar metals in contact in the presence of an electrolyte,
and an electron conductive path.
Generalized Corrosion
Corrosion that is disturbed more or less uniformly over the surface of a material.
,Localized Corrosion
Corrosion that occurs at discrete sites on the metal surface.
Return Path (Metallic Pathway)
Path that connects the anode and cathode, allowing passage of electrons, generated at the anode,
to the cathode.
The principal component of mild carbon steel is ________.
A. Iron (Fe)
B. Carbon (C)
C. Chromium (Cr)
D. Silicon (Si)
A. Iron (Fe)
The formation of a thin surface layer on metals, whether an oxide, carbonate, or other
compound, that slows the rate of corrosion process is called?
A. Electro-osmosis
B. Electro-deposition
C. Faying surface
D. Passivation
D. Passivation
Which is the part of the corrosion cell where metal dissolves?
A. Anode
B. Cathode
C. Ionic pathway
D. Electrolyte
A. Anode
,Which of these elements is likely to accelerate corrosion on a steel structure? (Select all that
apply)
A. Salts
B. Low temperatures
C. High temperatures
D. Pollutants
A. Salts
C. High temperatures
D. Pollutants
In a cathodic protection system, the metal being protected is the _______?
A. Anode
B. Cathode
C. Ground bed
D. Rectifier
B. Cathode
When parts of a metal surface are shielded from full exposure to the environment because
of the close proximity of another metal, corrosion at that location is identified as _______?
A. Fretting corrosion
B. Cavitation-erosion corrosion
C. Pitting corrosion
D. Crevice corrosion
D. Crevice corrosion
Cathodic protection using impressed current is most commonly used on ______?
A. Off-shore drilling platforms
B. High voltage transmission towers
, C. Pipelines
D. Trucks
C. Pipelines
Impressed current ground bed anodes are likely to include ________? (Select all that
apply)
A. Graphite
B. Zinc
C. High silicon cast iron
D. Aluminum
A. Graphite
C. High silicon cast iron
ADsorbent Desiccants
Desiccants in their LIQUID form are called "ADsorbent desiccants". This includes common
sulfuric acid (used in chemical manufacturing), lithium chloride, or polymeric materials, such as
triethylene glycol.
ABsorbent Desiccants
Desiccants in their SOLD form are called "ABsorbent desiccants". Moisture is adsorbed onto the
surface of a granular material, such as silico gel, which is capable of holding large quantities of
moisture.
Boundry Layer
The layer of air immediately adjacent to the steel surface.
Desiccant(s)
Substances that naturally have a high affinity for water. They draw moisture directly from the
surrounding environment.
You are a coating inspector on a project with dehumidification provided by a rotating bed
type dehumidifier. The silica gel has become contaminated. What do you expect to happen
