Electrometallurgy and Corrosion MCQ Questions and Answers | Metallurgical Engineering

A. Observed with thin highly protective oxide films at low temperature

B. W = E log (Ft + G)

C. Both A and B

D. None of these

A. Silverware

B. Galvanized steel

C. Tin cans

D. Silverware, galvanized steel, and tin cans

A. Primary passive potential

B. Breakdown potential

C. Trans-passive potential

D. Pitting potential

A. A wire or powder through melting flame is blown onto the surface to be protected

B. Coating metal is vaporized electrically to deposit on the metals to be coated

C. Hot rolling of two metals together to get a composite sheet

D. Immersing native metal in a solution of the metal to be plated

A. y² = 2K₁t + K₂

B. y = K₁log(K₂t + K₃)

C. y = K₁f + K₂

D. y = K₁t³ + K₂

A. Alclad

B. Aluminium

C. Galvanized steel

D. Zinc

A. anodic protection

B. cathodic protection

C. using inhibitors

D. using a special alloy resistant to corrosion

A. Rate of reaction is can't be predicted

B. It neglects the impurities of working conditions

C. Stability of metallic species is predicted

D. Rate of reaction is not predicted and it neglects the impurities of working conditions

A. Martensitic steel are less susceptible to pitting corrosion than austenitic steels

B. Pitting corrosion is usually very localised

C. Hydrogen embrittlement is facilitated by tensile stress

D. Stress corrosion cracking is facilitated by tensile stress

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