Q. What is the relationship between reaction rate and overvoltage for activation polarization?

View solution

Q. Which of the following is/are correct regarding concentration polarization?

View solution

Q. What is the formula to determine limiting diffusion current density (iL) of concentration polarization?

View solution

Q. Agitation will increase the limiting diffusion current density of concentration polarization.

View solution

Q. Which of the following is/are correct regarding resistance polarization?

View solution

Q. Which two scientists present the first formal presentation on mixed potential theory?

View solution

Q. Which of the following is/are the hypothesis of mixed potential theory?

View solution

Q. Which of the following is/are correct regarding passivation?

View solution

Q. The passive state of a metal is often relatively unstable and subject to damage.

View solution

Q. Which of the following is/are the metal/alloys that demonstrate active-passive transitions?

View solution

Q. Which of the following is/are correct regarding the active region of metals?

View solution

Q. The Trans passive region is the region in which the corrosion rate increases with an increase in potential.

View solution

Q. Which of the following is/are the important characteristics of active-passive transitions of a metal?

View solution

Q. Which of the following metal doesn’t possess a trans passive region?

View solution

Q. Which of the following metals/alloys passivates spontaneously in acid solutions containing oxidizers or dissolved oxygen?

View solution

Q. Which of the following is/are the applications of mixed-potential theory?

View solution

Q. Which of the following is/are correct when oxidizing agents are added to a corrosion system containing a non-passivating metal?

View solution

Q. The corrosion rate is usually dependent at low velocity whereas at high velocities it becomes independent.

View solution

Q. Which of the following type of polarization has a negligible effect on velocity?

View solution

Q. Severe corrosion of metals occurred when coupled with platinum is due to the higher current density for hydrogen evolution but not due to the reversible potential of the platinum-platinum ion electrode.

View solution