Corrosion Engineering Modern Theory Principles Passivity Online Exam Quiz
Corrosion Engineering Modern Theory Principles Passivity GK Quiz. Question and Answers related to Corrosion Engineering Modern Theory Principles Passivity. MCQ (Multiple Choice Questions with answers about Corrosion Engineering Modern Theory Principles Passivity
What is depicted in the given polarization curve?
Options
A : Cathodic dissolution of typical active-passive transition metal
B : Anodic dissolution of typical active-passive transition metal
C : Anodic dissolution of a metal
D : Cathodic dissolution of a metal
Which of the following metals/alloys passivates spontaneously in acid solutions containing oxidizers or dissolved oxygen?
Options
A : Copper
B : Titanium
C : Stainless steels and titanium
D : Nickel
Which of the following is/are correct regarding the active region of metals?
Options
A : Corrosion rates increase exponentially
B : Corrosion rates increase linearly
C : It follows typical Tafel behavior
D : It follows typical Tafel behavior and corrosion rates increases exponentially
Which of the following statements is/are correct regarding the given schematic?
Options
A : Increase in acid concentration and temperature increase the passive potential
B : Increase in acid concentration and temperature increase critical current density
C : The relative reduction in the size of the passive region
D : Increase in acid concentration and temperature increase critical current density, passive potential and we can observe a relative reduction in the size of the passive region
Which of the following metal doesn’t possess a trans passive region?
Options
A : Iron
B : Titanium
C : Nickel
D : Aluminum
Which of the following is/are the metal/alloys that demonstrate active-passive transitions?
Options
A : Iron and stainless steels
B : Nickel and its alloys
C : Iron, stainless steels, nickels, titanium, and its alloys
D : Titanium and its alloys
Which of the following is/are correct regarding passivation?
Options
A : It is defined as the loss of reactivity at certain conditions
B : Usually results in the formation of the oxide layer
C : The corrosion rates are relatively low
D : It is defined as loss of reactivity at certain conditions usually due to the formation of the oxide layer and corrosion rates are relatively low
Which of the following is/are the important characteristics of active-passive transitions of a metal?
Options
A : Passive potential (Epp)
B : Critical anodic current density (ic)
C : Passive potential (Epp) and Critical anodic current density (ic)
D : Neither passive potential nor critical anodic current density
The passive state of a metal is often relatively unstable and subject to damage.
Options
A : True
B : False
C :
D :
The Trans passive region is the region in which the corrosion rate increases with an increase in potential.
Options
A : True
B : False
C :
D :
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