Define area effect regarding galvanic corrosion? A. cathodic

define-area-effect-regarding-galvanic-corrosion-a-cathodic

Define area effect regarding galvanic corrosion?

A. cathodic area * anodic area

B. anodic area/cathodic area

C. cathodic area/anodic area

D. cathodic area + anodic area

This question was posed to me in a national level competition.

My question is based upon Eight Forms in portion Eight Forms of Corrosion of Corrosion Engineering

Correct option is C. cathodic area/anodic area

To explain I would say: It is the ratio of cathodic to anodic areas. An unfavorable area ratio with a large cathodic area and small anodic area results in high current density at the anode. The greater the current density at an anodic area the greater the corrosion rate.