2. Understanding Corrosion

2.6 A Look at Polarization [3/3]

 Points to Remember:

hc < heq

ha > heq

  • The potential of the polarized cell is smaller than the potential at equilibrium

  • hcell > heq


    1. Current: Polarization will increase with increasing current

    2. Area: The larger the area, the smaller would be the polarization

    3. Temperature: The higher the temperature, the lower is the polarization

    4. Agitation: The higher the agitation, the higher is the polarization

    5. Concentration: For cathodic reactions involving dilute electrolytes polarize rapidly. In anodic reactions, polarization is the highest with concentrated electrolyte.