Quiz on Corrosion

During wet corrosion in acidic environment,........

• oxygen absorption occurs

• oxygen evolution occurs

• hydrogen evolution occurs

• hydrogen absorption occurs

During galvanic corrosion, more noble metal acts as....

• anode

• cathode

• anode and cathode

• corroding metal

The metal at the top of electrochemical series is......

• most stable

• more noble

• less active

• more active

The corrosion by the mechanism of oxygen absorption can occur if

• electrolyte is neutral or alkaline

• electrolyte is neutral or acidic

• electrolyte is neither acidic nor acidic

• none of the above

During differential aeration type corrosion, the corrosion.....

• occurs at more oxygenated part

• occurs at less oxygenated part

• is uniform throughout

• occurs at the cathodic part

State whether True or False: In Evolution of Hydrogen mechanism, the anodic area is smaller while the cathodic area is bigger.

• True

• False