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WorksheetsCorrosion of Metals
Total questions: 15
Worksheet time: 9mins
Corrosion can be divided into different classes. Choose the correct classes.
Dry corrosion
Wet corrosion
Humid corrosion
Hot corrosion
Choose correct statement(s) for dry corrosion.
Absence of liquid
Occurs when a liquid present
Vapors and gases are usually corrosive
Low temperature corrosion
Choose statement(s) related to wet corrosion.
Also known as galvanic corrosion
High temperature corrosion
Transmission of positive and negative ions
Occurs above dew point of the environment
Oxidation occurs at ...............................
Anode
Cathode
Metal ion deposition is a cathodic reaction.
True
False
Corrosion takes place at anode.
True
False
Not enough information
A more positive potential material will act as
Anode
Cathode
Choose statement(s) related to uniform attack.
Occur randomly over the surface
Result in scale or deposit
Penetrate from the top downward
Associated with small volumes of stagnant solution
Choose statement(s) related to pitting corrosion
Formation of small pits and holes
Result in scale or deposit
Penetrate from the top downward
Associated with small volumes of stagnant solution
Choose statement(s) related to stress corrosion cracking
Occurs in same part/metal
Result in scale or deposit
Penetrate from the top downward
Area with high stress in anodic
- Occurs in alloy metals
- Occurs at grain boundaries
These statements are referring to .........................
Galvanic corrosion
Pitting corrosion
Intergranular corrosion
Stress corrosion
The picture shows an example of ........................ corrosion.
Pitting
Crevice
Galvanic
Intergranular
This is an example of ...................................... corrosion.
Crevice
Uniform attach
Galvanic
Pitting
Z corrosion occurs when 2 metals/alloys having different compositions are electrically coupled while exposed to an electrolyte. What is Z?
Galvanic
Crevice
Pitting
Stress
This is an example of ...................................... corrosion.
Crevice
Uniform attack
Galvanic
Pitting
