Corrosions Chapter 6: Cathodic
Protection Exam Actual Questions and
Answers 2026
The corrosion rate and represents the number of electrons
removed from the surface of the metal -
correct answer ✅Icorr
How is cathodic protection achieved? -
correct answer ✅By supplying electrons to the metal structure to
be protected
Corrosion can be stopped or reduced by what? -
correct answer ✅By providing an adequate supply of electrons so
that no positive metal ions can form
There can be little or no corrosion when what is done? -
correct answer ✅When the metals are kept near or below its E
value.
the protective potential, E, will shift depending on what? -
correct answer ✅The ferrous ion concentration
To achieve total corrosion protection, it is necessary to do what two
things? -
, Corrosions Chapter 6: Cathodic
Protection Exam Actual Questions and
Answers 2026
correct answer ✅Monitor the ferrous ion concentration around
the structure AND maintain its potential at or below its E value
What are the two ways to provide electrons and lower its
potential? -
correct answer ✅Galvanic Couple and an external power source
called a Rectifier System
What is the Galvanic Protection Method? -
correct answer ✅This method consists of simply connecting the
metal to be protected with a metal which is above it in the galvanic
series. The result is that the corrosion rate of the more active metal
increases while that of the other metal is reduced.
The more active metal in the Galvanic Protection method is
_________ while the less active one is now ____________. -
correct answer ✅anodic and cathodic
Is it possible to use the mixed potential theory to explain what
happens to the anodic and cathodic curves -
correct answer ✅YES
Protection Exam Actual Questions and
Answers 2026
The corrosion rate and represents the number of electrons
removed from the surface of the metal -
correct answer ✅Icorr
How is cathodic protection achieved? -
correct answer ✅By supplying electrons to the metal structure to
be protected
Corrosion can be stopped or reduced by what? -
correct answer ✅By providing an adequate supply of electrons so
that no positive metal ions can form
There can be little or no corrosion when what is done? -
correct answer ✅When the metals are kept near or below its E
value.
the protective potential, E, will shift depending on what? -
correct answer ✅The ferrous ion concentration
To achieve total corrosion protection, it is necessary to do what two
things? -
, Corrosions Chapter 6: Cathodic
Protection Exam Actual Questions and
Answers 2026
correct answer ✅Monitor the ferrous ion concentration around
the structure AND maintain its potential at or below its E value
What are the two ways to provide electrons and lower its
potential? -
correct answer ✅Galvanic Couple and an external power source
called a Rectifier System
What is the Galvanic Protection Method? -
correct answer ✅This method consists of simply connecting the
metal to be protected with a metal which is above it in the galvanic
series. The result is that the corrosion rate of the more active metal
increases while that of the other metal is reduced.
The more active metal in the Galvanic Protection method is
_________ while the less active one is now ____________. -
correct answer ✅anodic and cathodic
Is it possible to use the mixed potential theory to explain what
happens to the anodic and cathodic curves -
correct answer ✅YES
