Ampp CP2 Chapter 1 Corrosion Theory
Exam Actual Questions and Answers
2026
Corrosion -
correct answer ✅Electrochemical process involving the flow of
electrons and ions. Metal loss (corrosion) occurs at the anode. No
metal loss occurs at the cathode
Corrosion Cell -
correct answer ✅Anode, cathode, Electrolyte and Electronic path
Galvanic Series -
correct answer ✅Potential difference between metals exposed to
solutions contain the respective ions at unit activity. Metals are
arranged from the most noble to the most active.
Electromotive -
correct answer ✅Two electrodes are placed in the electrolyte,
electrochemical reaction will occur on earth, and each will corrode
and exabit an electrode potential. Metal polarize when connected
together and this affects the voltage between them.
Sources of driving voltage of corrosion cell -
correct answer ✅- Grain structures
,Ampp CP2 Chapter 1 Corrosion Theory
Exam Actual Questions and Answers
2026
-Composition formed during alloying
- Temp differences
- Stress from welding or cold working
Nernst Equation -
correct answer ✅Express the exact electromotive force of an
electrode in terms of the activates of products and reactants of the
electrode.
Ion concertation -
correct answer ✅The higher the concentration of metal ions the
less active or more noble the metal
Temperature Differences -
correct answer ✅Most cases the electrode at the higher
temperature becomes the anode.
Temp differences along metal structure -
correct answer ✅The cooler pipe near the surface piping makes up
the cathode.
, Ampp CP2 Chapter 1 Corrosion Theory
Exam Actual Questions and Answers
2026
Effects of Alloying - Intergranular corrosion and leaching -
correct answer ✅Grain boundaries can become enriched or
depleted of alloying elements. These differences in alloy
composition may cause intergranular corrosion. Some alloys involve
selective leaching.
Metal Fabrication -
correct answer ✅Metals may experience variations in stress.
Higher stressed areas of metal tend to have higher energy levels
thus being more active.
Concentration Cells -
correct answer ✅Responsible for much of the corrosion that takes
place in soil. Occurs when two or more areas of a metal surface in
contact with different concentrations of the same solution.
Concentration Cells - Oxygen Concentration cell -
correct answer ✅Being the most common of the CP depolarizers,
Surfaces in contact with the solution containing a higher
concentration of oxygen will become cathodic as result
Exam Actual Questions and Answers
2026
Corrosion -
correct answer ✅Electrochemical process involving the flow of
electrons and ions. Metal loss (corrosion) occurs at the anode. No
metal loss occurs at the cathode
Corrosion Cell -
correct answer ✅Anode, cathode, Electrolyte and Electronic path
Galvanic Series -
correct answer ✅Potential difference between metals exposed to
solutions contain the respective ions at unit activity. Metals are
arranged from the most noble to the most active.
Electromotive -
correct answer ✅Two electrodes are placed in the electrolyte,
electrochemical reaction will occur on earth, and each will corrode
and exabit an electrode potential. Metal polarize when connected
together and this affects the voltage between them.
Sources of driving voltage of corrosion cell -
correct answer ✅- Grain structures
,Ampp CP2 Chapter 1 Corrosion Theory
Exam Actual Questions and Answers
2026
-Composition formed during alloying
- Temp differences
- Stress from welding or cold working
Nernst Equation -
correct answer ✅Express the exact electromotive force of an
electrode in terms of the activates of products and reactants of the
electrode.
Ion concertation -
correct answer ✅The higher the concentration of metal ions the
less active or more noble the metal
Temperature Differences -
correct answer ✅Most cases the electrode at the higher
temperature becomes the anode.
Temp differences along metal structure -
correct answer ✅The cooler pipe near the surface piping makes up
the cathode.
, Ampp CP2 Chapter 1 Corrosion Theory
Exam Actual Questions and Answers
2026
Effects of Alloying - Intergranular corrosion and leaching -
correct answer ✅Grain boundaries can become enriched or
depleted of alloying elements. These differences in alloy
composition may cause intergranular corrosion. Some alloys involve
selective leaching.
Metal Fabrication -
correct answer ✅Metals may experience variations in stress.
Higher stressed areas of metal tend to have higher energy levels
thus being more active.
Concentration Cells -
correct answer ✅Responsible for much of the corrosion that takes
place in soil. Occurs when two or more areas of a metal surface in
contact with different concentrations of the same solution.
Concentration Cells - Oxygen Concentration cell -
correct answer ✅Being the most common of the CP depolarizers,
Surfaces in contact with the solution containing a higher
concentration of oxygen will become cathodic as result
