|
|
|
|
Multiple Choice Questions on Corrosion Kinetics |
|
| Questions 6 - 10 |
Page 2 of 3 |
|
6. |
In experimentally establishing a polarization diagram, the first measurement is |
|
|
[ ] |
corrosion current |
|
|
[ ] |
corrosion potential |
|
|
[ ] |
exchange current |
|
|
[ ] |
limiting current |
|
|
7. |
When polarization occurs at the cathode, the corrosion is said to be under |
|
|
[ ] |
anodic control |
|
|
[ ] |
cathodic control |
|
|
[ ] |
mixed control |
|
| [ ] | resistance control | |
|
8. |
In polarization measurements, the current is measured |
|
|
[ ] |
between the working electrode and the reference electrode |
|
|
[ ] |
between the working electrode and the counter-electrode |
|
| [ ] |
between the counter-electrode and the reference electrode |
|
| [ ] | only at the counter-electrode | |
|
9. |
The corresponding over-voltage is smaller if |
|
|
[ ] |
the value of Icorr is larger |
|
|
[ ] |
the value of β is larger |
|
|
[ ] |
the value of Io is larger |
|
| [ ] | IR drop is larger | |
|
10. |
Which one of the following increase the exchange current density of hydrogen reduction on a metallic surface? |
|
|
[ ] |
Increasing the temperature |
|
|
[ ] |
Presence of impurity |
|
|
[ ] |
Increased surface area of electrode |
|
|
[ ] |
Lowering the temperature | |
|
|