WorksheetsCorrosion
Total questions: 25
Worksheet time: 5mins
Corrosion of Metals involves
Physical reactions
chemical reactions
Both
None
The following factors plays a vital role in corrosion process
Temperature
Solute Concentrations
Both
None
Following equation is related to corrosion rate
Nernst equation
Faraday's equation
Either
Neither
Passivity is due to
Higher EMF
Lower EMF
oxide film
All
Which of the following can be used for cathodic protection
Al
Cd
Cu
None
When Pt and Co are electrically connected, which one gets corroded
Pt
Co
Both
Can't decide
Difficult to monitor and very dangerous form of corrosion
Galvanic Corrosion
Pitting Corrosion
Crevice
Stress
Passivity is not the reason for inertness of the following
Au
Al
Ti
Ni
Main form of ceramic degradation is
Corrosion
Weathering
Dissolution
Swelling
Rusting of iron is
Oxidation Corrosion
Liquid metal corrosion
Wet corrosion
Corrosion by other gases
Lower is pH, corrosion is
Greater
Lower
Constant
None of the above
Volatile oxidation product of a metal is
Iron oxide
Molybdenum oxide
Both a & b
None of the above
Process of corrosion is enhanced by
Air & Moisture
Electrolytes in water
Metallic impurities
All of the above
Which of the following material does not resist the corrosion
Cu
Ni
Pb
Fe
Electrochemical corrosion takes place on
Anodic area
cathodic area
Near cathode
Near anode
Corrosion of material by furnace gases is classified as
Dry corrosion
Wet corrosion
Crevice corrosion
Galvanic corrosion
Chemical action of flowing liquid metal at high temperature is
Liquid metal corrosion
corrosion by other gases
Oxidation corrosion
Wet corrosion
Corrosion between the dissimilar metal is called as
Dry corrosion
Oxidation corrosion
Galvanic corrosion
Concentration cell corrosion
Corrosion along the grain boundaries is called
Stress corrosion
Intergranular corrosion
Water line corrosion
Pitting corrosion
Corrosion can be prevented by
Alloying
Tinning
Galvanizing
All of the above
The erosion corrosion can be controlled by
Increase the flow velocity through pipes
Increase temperature of fluid
Minimizing turbulence
None of the above
Which type of chemical reaction is observed at cathode in electrochemical corrosion
Oxidation reaction
Peritectic reaction
Reduction reaction
None of the above
Corrosion fatigue is combined effect of
Corrosion environment and mechanical stresses
Cyclic loading and corrosion
Velocity and mechanical stresses
None of the above
Knife line attack is a type of
Bi metal corrosion
Intergranular corrosion
Localized corrosion
Uniform corrosion
When zinc is plated on steel the anode is made up of
steel
Carbon
Oxygen
Zinc
